Fixed conflicts after merge with master

resources/localization/list.txt

@@ -87,6 +87,7 @@ src/slic3r/GUI/UpdateDialogs.cpp
 src/slic3r/GUI/WipeTowerDialog.cpp
 src/slic3r/GUI/wxExtensions.cpp
 src/slic3r/Utils/AstroBox.cpp
+src/slic3r/Utils/AppUpdater.cpp
 src/slic3r/Utils/Duet.cpp
 src/slic3r/Utils/FixModelByWin10.cpp
 src/slic3r/Utils/FlashAir.cpp
@@ -101,6 +102,7 @@ src/libslic3r/ExtrusionEntity.cpp
 src/libslic3r/Flow.cpp
 src/libslic3r/Format/3mf.cpp
 src/libslic3r/Format/AMF.cpp
+src/libslic3r/Format/SLAArchiveReader.cpp
 src/libslic3r/GCode/PostProcessor.cpp
 src/libslic3r/miniz_extension.cpp
 src/libslic3r/Preset.cpp
@@ -113,3 +115,4 @@ src/libslic3r/PrintBase.cpp
 src/libslic3r/PrintConfig.cpp
 src/libslic3r/Zipper.cpp
 src/libslic3r/PrintObject.cpp
+src/libslic3r/PrintObjectSlice.cpp

resources/profiles/Anker.idx

@@ -1,3 +1,5 @@
+min_slic3r_version = 2.6.0-alpha4
+1.1.1 Initial official version
+1.0.1 Initial Version
 min_slic3r_version = 2.6.0-alpha1
-1.0.1 Disabled thick bridges.
 1.0.0 Initial Version

resources/profiles/Anker.ini

@@ -1,14 +1,14 @@
 # Print profiles for the AnkerMake printers.
-# https://github.com/prusa3d/PrusaSlicer/pull/9075 by @just-trey
 
 [vendor]
 # Vendor name will be shown by the Config Wizard.
-name = Anker
+name = AnkerMake
 # Configuration version of this file. Config file will only be installed, if the config_version differs.
 # This means, the server may force the PrusaSlicer configuration to be downgraded.
-config_version = 1.0.1
+config_version = 1.1.1
 # Where to get the updates from?
 config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/Anker/
+# changelog_url = https://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
 
 # The printer models will be shown by the Configuration Wizard in this order,
 # also the first model installed & the first nozzle installed will be activated after install.
@@ -20,8 +20,9 @@ variants = 0.4
 technology = FFF
 family = AnkerMake
 bed_model = M5-bed.stl
-bed_texture = M5-texture.svg
+bed_texture = M5-texture_v2.svg
-default_materials = Generic PLA+ @ANKER; Generic PLA @ANKER; Generic PET @ANKER; Generic ABS @ANKER 
+thumbnail = M5_thumbnail_v2.png
+default_materials = Generic PLA+ @ANKER; Generic PLA @ANKER; Generic PET @ANKER; Generic ABS @ANKER; 
 
 # All presets starting with asterisk, for example *common*, are intermediate and they will
 # not make it into the user interface.
@@ -31,8 +32,8 @@ default_materials = Generic PLA+ @ANKER; Generic PLA @ANKER; Generic PET @ANKER;
 avoid_crossing_perimeters = 0
 bridge_acceleration = 2500
 bridge_angle = 0
-bridge_flow_ratio = 0.95
+bridge_flow_ratio = 1
-bridge_speed = 150
+bridge_speed = 50
 brim_separation = 0.1
 brim_type = outer_only
 brim_width = 0
@@ -40,32 +41,36 @@ clip_multipart_objects = 1
 complete_objects = 0
 default_acceleration = 2500
 dont_support_bridges = 1
-elefant_foot_compensation = 0.1
+elefant_foot_compensation = 0.2
 ensure_vertical_shell_thickness = 1
 external_perimeter_speed = 150
 external_perimeters_first = 0
 extra_perimeters = 0
 extruder_clearance_height = 30
 extruder_clearance_radius = 45
+extrusion_width = 0.4
+external_perimeter_extrusion_width = 0.44
+
 fill_angle = 45
-fill_density = 15%
+fill_density = 10%
-fill_pattern = cubic
+fill_pattern = grid
 first_layer_acceleration = 2500
 first_layer_acceleration_over_raft = 0
-first_layer_extrusion_width = 200%
+first_layer_extrusion_width = 0.4
 first_layer_speed = 50%
 first_layer_speed_over_raft = 30
 gap_fill_enabled = 1
 gap_fill_speed = 150
 gcode_comments = 0
 infill_acceleration = 2500
-infill_anchor = 600%
+infill_anchor = 2.5
-infill_anchor_max = 50
+infill_anchor_max = 12
 infill_every_layers = 1
 infill_extruder = 1
 infill_first = 0
+infill_extrusion_width = 0.4
 infill_only_where_needed = 0
-infill_overlap = 23%
+infill_overlap = 10%
 infill_speed = 250
 interface_shells = 0
 max_print_speed = 250
@@ -76,18 +81,18 @@ min_skirt_length = 4
 notes = 
 only_retract_when_crossing_perimeters = 0
 ooze_prevention = 0
-output_filename_format = {input_filename_base}_{digits(layer_height,1,2)}mm_{filament_type[0]}_{printer_model}.gcode
+output_filename_format = {input_filename_base}_{layer_height}mm_{initial_filament_type}_{printer_model}.gcode
 overhangs = 1
 perimeter_acceleration = 2500
 perimeter_extruder = 1
-perimeter_extrusion_width = 0
+perimeter_extrusion_width = 0.4
-perimeter_generator = arachne
+perimeter_generator = classic
 perimeter_speed = 250
 perimeters = 3
 post_process = 
 print_settings_id = 
 raft_layers = 0
-resolution = 0
+resolution = 0.01
 seam_position = aligned
 single_extruder_multi_material_priming = 0
 skirt_distance = 3
@@ -97,32 +102,37 @@ small_perimeter_speed = 150
 solid_infill_below_area = 0
 solid_infill_every_layers = 0
 solid_infill_extruder = 1
-solid_infill_speed = 175
+solid_infill_extrusion_width = 0.4
+solid_infill_speed = 250
 spiral_vase = 0
 standby_temperature_delta = -5
+support_material_auto = 0
 support_material = 0
 support_material_angle = 0
 support_material_buildplate_only = 0
-support_material_contact_distance = 0.15
+support_material_contact_distance = 0.1
 support_material_enforce_layers = 0
 support_material_extruder = 0
 support_material_interface_contact_loops = 0
 support_material_interface_extruder = 0
 support_material_interface_layers = 2
 support_material_interface_spacing = 0.2
-support_material_interface_speed = 100%
+support_material_interface_speed = 80%
 support_material_pattern = rectilinear
 support_material_spacing = 2
-support_material_speed = 125
+support_material_speed = 150
 support_material_synchronize_layers = 0
-support_material_threshold = 40
+support_material_threshold = 55
 support_material_with_sheath = 0
-support_material_xy_spacing = 60%
+support_material_xy_spacing = 50%
 thick_bridges = 0
 thin_walls = 0
 top_solid_infill_speed = 150
-travel_speed = 300
+top_infill_extrusion_width = 0.4
-travel_speed_z = 10
+top_fill_pattern = rectilinear
+bottom_fill_pattern = rectilinear
+travel_speed = 250
+travel_speed_z = 0
 wipe_tower = 0
 wipe_tower_bridging = 10
 wipe_tower_rotation_angle = 0
@@ -131,86 +141,49 @@ wipe_tower_x = 170
 wipe_tower_y = 140
 xy_size_compensation = 0
 
-[print:*0.08mm*]
-inherits = *common*
-layer_height = 0.08
-first_layer_height = 0.12
-bottom_solid_layers = 9
-top_solid_layers = 11
-bridge_flow_ratio = 0.70
-
 [print:*0.10mm*]
 inherits = *common*
 layer_height = 0.10
-first_layer_height = 0.14
+first_layer_height = 0.10
 bottom_solid_layers = 7
 top_solid_layers = 9
-bridge_flow_ratio = 0.70
+bridge_flow_ratio = 1
-
-[print:*0.12mm*]
-inherits = *common*
-layer_height = 0.12
-first_layer_height = 0.16
-bottom_solid_layers = 6
-top_solid_layers = 7
-bridge_flow_ratio = 0.70
-
-[print:*0.16mm*]
-inherits = *common*
-layer_height = 0.16
-first_layer_height = 0.20
-bottom_solid_layers = 5
-top_solid_layers = 7
-bridge_flow_ratio = 0.85
 
 [print:*0.20mm*]
 inherits = *common*
 layer_height = 0.20
-first_layer_height = 0.24
+first_layer_height = 0.14
 bottom_solid_layers = 4
 top_solid_layers = 5
 
-[print:*0.24mm*]
+[print:*0.30mm*]
 inherits = *common*
-layer_height = 0.24
+layer_height = 0.30
-first_layer_height = 0.28
+first_layer_height = 0.21
 bottom_solid_layers = 3
 top_solid_layers = 4
 
-[print:*0.28mm*]
-inherits = *common*
-layer_height = 0.28
-first_layer_height = 0.28
-bottom_solid_layers = 3
-top_solid_layers = 4
-
-[print:0.08 mm SUPERDETAIL (0.4 mm nozzle) @ANKER]
-inherits = *0.08mm*
-compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
 
 [print:0.10 mm HIGHDETAIL (0.4 mm nozzle) @ANKER]
 inherits = *0.10mm*
 compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
 
-[print:0.12 mm DETAIL (0.4 mm nozzle) @ANKER]
-inherits = *0.12mm*
-compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
-
-[print:0.16 mm OPTIMAL (0.4 mm nozzle) @ANKER]
-inherits = *0.16mm*
-compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
-
 [print:0.20 mm NORMAL (0.4 mm nozzle) @ANKER]
 inherits = *0.20mm*
 compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
 
-[print:0.24 mm DRAFT (0.4 mm nozzle) @ANKER]
+
-inherits = *0.24mm*
+[print:0.30 mm SUPERDRAFT (0.4 mm nozzle) @ANKER]
+inherits = *0.30mm*
 compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
 
-[print:0.28 mm SUPERDRAFT (0.4 mm nozzle) @ANKER]
+# When submitting new filaments please print the following temperature tower at 0.1mm layer height:
-inherits = *0.28mm*
+#   https://www.thingiverse.com/thing:2615842
-compatible_printers_condition = printer_model=~/(M5).*/ and nozzle_diameter[0]==0.4
+# Pay particular attention to bridging, overhangs and retractions.
+# Also print the following bed adhesion test at 0.1 layer height as well:
+#   https://www.prusaprinters.org/prints/4634-bed-adhesion-warp-test
+# At least for PLA, please keep bed temp at 60, as many Creality printers do not have any ABL
+# So having some leeway to get good bed adhesion is not a luxury for many users
 
 [filament:*common*]
 cooling = 0
@@ -235,47 +208,47 @@ filament_type = PLA
 filament_density = 1.24
 filament_cost = 20
 first_layer_bed_temperature = 60
-first_layer_temperature = 210
+first_layer_temperature = 230
 fan_always_on = 1
 max_fan_speed = 100
 min_fan_speed = 100
 bridge_fan_speed = 100
-disable_fan_first_layers = 2
+disable_fan_first_layers = 1
-temperature = 205
+temperature = 200
 
 [filament:*PLA+*]
 inherits = *common*
 bed_temperature = 60
 fan_below_layer_time = 100
 filament_colour = #DDDDDD
-filament_type = PLA
+filament_type = PLA+
 filament_density = 1.24
 filament_cost = 20
 first_layer_bed_temperature = 60
-first_layer_temperature = 220
+first_layer_temperature = 230
 fan_always_on = 1
 max_fan_speed = 100
 min_fan_speed = 100
 bridge_fan_speed = 100
-disable_fan_first_layers = 2
+disable_fan_first_layers = 1
-temperature = 210
+temperature = 200
 
 [filament:*PET*]
 inherits = *common*
-bed_temperature = 70
+bed_temperature = 80
 disable_fan_first_layers = 2
 fan_below_layer_time = 20
 filament_colour = #DDDDDD
 filament_type = PETG
 filament_density = 1.27
 filament_cost = 30
-first_layer_bed_temperature = 70
+first_layer_bed_temperature = 80
-first_layer_temperature = 240
+first_layer_temperature = 260
 fan_always_on = 1
 max_fan_speed = 50
 min_fan_speed = 50
 bridge_fan_speed = 100
-temperature = 240
+temperature = 260
 
 [filament:*ABS*]
 inherits = *common*
@@ -286,14 +259,14 @@ filament_colour = #DDDDDD
 filament_type = ABS
 filament_density = 1.04
 filament_cost = 20
-first_layer_bed_temperature = 100
+first_layer_bed_temperature = 90
-first_layer_temperature = 245
+first_layer_temperature = 260
 fan_always_on = 0
 max_fan_speed = 0
 min_fan_speed = 0
 bridge_fan_speed = 30
 top_fan_speed = 0
-temperature = 245
+temperature = 260
 
 [filament:Generic PLA @ANKER]
 inherits = *PLA*
@@ -324,8 +297,8 @@ deretract_speed = 60
 extruder_colour = #FCE94F
 extruder_offset = 0x0
 gcode_flavor = marlin
-silent_mode = 0
+silent_mode = 1
-remaining_times = 0
+remaining_times = 1
 machine_max_acceleration_e = 2500
 machine_max_acceleration_extruding = 2500
 machine_max_acceleration_retracting = 2500
@@ -338,8 +311,8 @@ machine_max_feedrate_x = 300
 machine_max_feedrate_y = 300
 machine_max_feedrate_z = 20
 machine_max_jerk_e = 3
-machine_max_jerk_x = 30
+machine_max_jerk_x = 15
-machine_max_jerk_y = 30
+machine_max_jerk_y = 15
 machine_max_jerk_z = 0.3
 machine_min_extruding_rate = 0
 machine_min_travel_rate = 0
@@ -347,10 +320,10 @@ layer_gcode = ;AFTER_LAYER_CHANGE\n;{layer_z}
 max_print_height = 250
 printer_notes = 
 printer_settings_id = 
-retract_before_travel = 2
+retract_before_travel = 3
-retract_before_wipe = 70%
+retract_before_wipe = 0
 retract_layer_change = 1
-retract_length_toolchange = 1
+retract_length_toolchange = 4
 retract_lift = 0
 retract_lift_above = 0
 retract_lift_below = 0
@@ -365,10 +338,10 @@ use_firmware_retraction = 0
 use_relative_e_distances = 0
 use_volumetric_e = 0
 variable_layer_height = 1
-wipe = 1
+wipe = 0
 z_offset = 0
-default_filament_profile = "Generic PLA+ @ANKER"
+default_filament_profile = Generic PLA+ @ANKER
-start_gcode = M104 S{first_layer_temperature[0]} ; set final nozzle temp\nM190 S{first_layer_bed_temperature[0]} ; set and wait for nozzle temp to stabilize\nM109 S{first_layer_temperature[0]} ; wait for nozzle temp to stabilize\nG28 ;Home\nG1 E10 F3600; push out retracted filament(fix for over retraction after prime)
+start_gcode = M104 S{first_layer_temperature[0]} ; set final nozzle temp\nM190 S{first_layer_bed_temperature[0]} ; set and wait for bed temp to stabilize\nM109 S{first_layer_temperature[0]} ; wait for nozzle temp to stabilize\nG28 ;Home\nM420 S1; restore saved Auto Bed Leveling data\nG1 E10 F3600; push out retracted filament(fix for over retraction after prime)
 end_gcode = M104 S0\nM140 S0\n;Retract the filament\nG92 E1\nG1 E-1 F300\nG28 X0 Y0\nM84
 
 [printer:*M5*]
@@ -376,12 +349,12 @@ inherits = *common*
 bed_shape = 0x0,235-0,235x235,0x235
 max_print_height = 250
 printer_model = M5
-retract_length = 1.25
+retract_length = 3
 retract_speed = 60
 deretract_speed = 60
-retract_before_travel = 1
+retract_before_travel = 3
 retract_before_wipe = 0%
-printer_notes = Don't remove the following keywords! These keywords are used in the "compatible printer" condition of the print and filament profiles to link the particular print and filament profiles to this printer profile.\nPRINTER_VENDOR_ANKERMAKE\nPRINTER_MODEL_M5
+printer_notes = Don not remove the following keywords! These keywords are used in the "compatible printer" condition of the print and filament profiles to link the particular print and filament profiles to this printer profile.\nPRINTER_VENDOR_ANKERMAKE\nPRINTER_MODEL_M5
 
 [printer:AnkerMake M5 (0.4 mm nozzle)]
 inherits = *M5*
@@ -389,5 +362,5 @@ nozzle_diameter = 0.4
 printer_variant = 0.4
 min_layer_height = 0.08
 max_layer_height = 0.32
-retract_lift_above = 0.2
+retract_lift_above = 0
-default_print_profile = "0.16 mm OPTIMAL (0.4 mm nozzle) @ANKER"
+default_print_profile = 0.2 mm OPTIMAL (0.4 mm nozzle) @ANKER

resources/profiles/PrusaResearch.idx

@@ -1,9 +1,21 @@
+min_slic3r_version = 2.6.0-alpha5
+1.9.0-alpha1 Added profiles for Original Prusa MK4.
+1.9.0-alpha0 Updated output filename format.
+1.7.0-alpha2 Updated compatibility condition in some filament profiles (Prusa XL).
+1.7.0-alpha1 Added profiles for Original Prusa XL. Added filament profile for Prusament PETG Tungsten 75%.
 min_slic3r_version = 2.6.0-alpha1
 1.7.0-alpha0 Added profiles for Print With Smile filaments.
 1.6.0-alpha2 Added profile for Prusament PETG Carbon Fiber and Fiberthree F3 PA-GF30 Pro. Updated acceleration settings for Prusa MINI.
 1.6.0-alpha1 Updated FW version notification. Decreased min layer time for PLA.
 1.6.0-alpha0 Default top fill set to monotonic lines. Updated infill/perimeter overlap values. Updated output filename format. Enabled dynamic overhang speeds.
+min_slic3r_version = 2.5.1-rc0
+1.6.3 Added SLA materials.
+1.6.2 Updated compatibility condition in some filament profiles (Prusa XL).
+1.6.1 Added filament profile for Prusament PETG Tungsten 75%. Updated Prusa XL profiles.
+1.6.0 Added Original Prusa XL profiles. Updated acceleration settings for Prusa MINI. Updated infill/perimeter overlap values.
 min_slic3r_version = 2.5.0-alpha0
+1.5.9 Added SLA materials.
+1.5.8 Added filament profile for Prusament PETG Tungsten 75%. Updated FW version notification.
 1.5.7 Added filament profile for Prusament PETG Carbon Fiber and Fiberthree F3 PA-GF30 Pro.
 1.5.6 Updated FW version notification (MK2.5/MK3 family). Added filament profile for Kimya PEBA-S.
 1.5.5 Added new Prusament Resin material profiles. Enabled g-code thumbnails for MK2.5 family printers.
@@ -15,6 +27,7 @@ min_slic3r_version = 2.5.0-alpha0
 1.5.0-alpha1 Added filament profile for Prusament PA11 Carbon Fiber. Added profiles for multiple 3D-Fuel filaments.
 1.5.0-alpha0 Added parameters for Arachne perimeter generator. Changed default seam position. Updated output filename format.
 min_slic3r_version = 2.4.0-rc
+1.4.10 Updated FW version notification.
 1.4.9 Updated FW version notification.
 1.4.8 Added filament and SLA material profiles. Updated settings.
 1.4.7 Added filament profile for Prusament PA11 Carbon Fiber. Added profiles for multiple 3D-Fuel filaments.
@@ -45,6 +58,7 @@ min_slic3r_version = 2.4.0-alpha0
 1.3.0-alpha1 Added Prusament PCCF. Increased travel acceleration for Prusa MINI. Updated start g-code for Prusa MINI. Added multiple add:north and Extrudr filament profiles. Updated Z travel speed values.
 1.3.0-alpha0 Disabled thick bridges, updated support settings.
 min_slic3r_version = 2.3.2-alpha0
+1.3.9 Updated FW version notification.
 1.3.8 Updated FW version notification.
 1.3.7 Updated firmware version.
 1.3.6 Updated firmware version.
@@ -55,6 +69,7 @@ min_slic3r_version = 2.3.2-alpha0
 1.3.1 Added multiple add:north and Extrudr filament profiles. Updated support head settings (SL1S).
 1.3.0 Added SL1S SPEED profiles.
 min_slic3r_version = 2.3.0-rc1
+1.2.14 Updated FW version notification.
 1.2.13 Updated FW version notification.
 1.2.12 Updated firmware version.
 1.2.11 Updated firmware version.

resources/profiles/PrusaResearch/mk4.svg

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg id="svg3128" xmlns="http://www.w3.org/2000/svg" width="710.1" height="596.7" viewBox="0 0 710.1 596.7">
+  <line id="line2794" x1=".7" y1=".7" x2=".7" y2="596" style="fill: none; stroke: #fff; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.4px;"/>
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+</svg>

src/libnest2d/include/libnest2d/geometry_traits.hpp

@@ -871,7 +871,7 @@ template<class P> auto rcend(const P& p) -> decltype(_backward(cbegin(p)))
 
 template<class P> TPoint<P> front(const P& p) { return *shapelike::cbegin(p); }
 template<class P> TPoint<P> back (const P& p) {
-    return *backward(shapelike::cend(p));
+    return *std::prev(shapelike::cend(p));
 }
 
 // Optional, does nothing by default

src/libnest2d/include/libnest2d/nester.hpp

@@ -70,6 +70,7 @@ class _Item {
     
     int binid_{BIN_ID_UNSET}, priority_{0};
     bool fixed_{false};
+    std::function<void(_Item&)> on_packed_;
 
 public:
 
@@ -205,6 +206,23 @@ public:
         sl::vertex(sh_, idx) = v;
     }
 
+    void setShape(RawShape rsh)
+    {
+        sh_ = std::move(rsh);
+        invalidateCache();
+    }
+
+    void setOnPackedFn(std::function<void(_Item&)> onpackedfn)
+    {
+        on_packed_ = onpackedfn;
+    }
+
+    void onPacked()
+    {
+        if (on_packed_)
+            on_packed_(*this);
+    }
+
     /**
      * @brief Calculate the shape area.
      *

src/libnest2d/include/libnest2d/placers/nfpplacer.hpp

@@ -157,26 +157,34 @@ template<class RawShape> class EdgeCache {
 
     void createCache(const RawShape& sh) {
         {   // For the contour
-            auto first = shapelike::cbegin(sh);
+            auto first = sl::cbegin(sh);
-            auto next = std::next(first);
+            auto endit = sl::cend(sh);
-            auto endit = shapelike::cend(sh);
+            auto next = first == endit ? endit : std::next(first);
 
-            contour_.distances.reserve(shapelike::contourVertexCount(sh));
+            contour_.distances.reserve(sl::contourVertexCount(sh));
 
             while(next != endit) {
                 contour_.emap.emplace_back(*(first++), *(next++));
                 contour_.full_distance += length(contour_.emap.back());
                 contour_.distances.emplace_back(contour_.full_distance);
             }
+
+            if constexpr (ClosureTypeV<RawShape> == Closure::OPEN) {
+                if (sl::contourVertexCount(sh) > 0) {
+                    contour_.emap.emplace_back(sl::back(sh), sl::front(sh));
+                    contour_.full_distance += length(contour_.emap.back());
+                    contour_.distances.emplace_back(contour_.full_distance);
+                }
+            }
         }
 
         for(auto& h : shapelike::holes(sh)) { // For the holes
-            auto first = h.begin();
+            auto first = sl::cbegin(h);
-            auto next = std::next(first);
+            auto endit = sl::cend(h);
-            auto endit = h.end();
+            auto next = first == endit ? endit :std::next(first);
 
             ContourCache hc;
-            hc.distances.reserve(endit - first);
+            hc.distances.reserve(sl::contourVertexCount(h));
 
             while(next != endit) {
                 hc.emap.emplace_back(*(first++), *(next++));
@@ -184,6 +192,14 @@ template<class RawShape> class EdgeCache {
                 hc.distances.emplace_back(hc.full_distance);
             }
 
+            if constexpr (ClosureTypeV<RawShape> == Closure::OPEN) {
+                if (sl::contourVertexCount(h) > 0) {
+                    hc.emap.emplace_back(sl::back(sh), sl::front(sh));
+                    hc.full_distance += length(hc.emap.back());
+                    hc.distances.emplace_back(hc.full_distance);
+                }
+            }
+
             holes_.emplace_back(std::move(hc));
         }
     }
@@ -206,7 +222,6 @@ template<class RawShape> class EdgeCache {
         contour_.corners.reserve(N / S + 1);
         contour_.corners.emplace_back(0.0);
         auto N_1 = N-1;
-        contour_.corners.emplace_back(0.0);
         for(size_t i = 0; i < N_1; i += S) {
             contour_.corners.emplace_back(
                     contour_.distances.at(i) / contour_.full_distance);
@@ -886,6 +901,7 @@ public:
 
         if(can_pack) {
             ret = PackResult(item);
+            item.onPacked();
             merged_pile_ = nfp::merge(merged_pile_, item.transformedShape());
         } else {
             ret = PackResult(best_overfit);

src/libslic3r/AABBTreeLines.hpp

@@ -165,9 +165,9 @@ inline std::vector<std::pair<VectorType, size_t>> get_intersections_with_line(si
 // Epsilon is applied to the bounding boxes of the AABB Tree to cope with numeric inaccuracies
 // during tree traversal.
 template<typename LineType>
-inline AABBTreeIndirect::Tree<2, typename LineType::Scalar> build_aabb_tree_over_indexed_lines(const std::vector<LineType> &lines)
+inline AABBTreeIndirect::Tree<LineType::Dim, typename LineType::Scalar> build_aabb_tree_over_indexed_lines(const std::vector<LineType> &lines)
 {
-    using TreeType = AABBTreeIndirect::Tree<2, typename LineType::Scalar>;
+    using TreeType = AABBTreeIndirect::Tree<LineType::Dim, typename LineType::Scalar>;
     //    using              CoordType      = typename TreeType::CoordType;
     using VectorType  = typename TreeType::VectorType;
     using BoundingBox = typename TreeType::BoundingBox;

src/libslic3r/AppConfig.cpp

@@ -340,12 +340,6 @@ std::string AppConfig::load(const std::string &path)
             // Error while parsing config file. We'll customize the error message and rethrow to be displayed.
             // ! But to avoid the use of _utf8 (related to use of wxWidgets) 
             // we will rethrow this exception from the place of load() call, if returned value wouldn't be empty
-            /*
-            throw Slic3r::RuntimeError(
-                _utf8(L("Error parsing PrusaSlicer config file, it is probably corrupted. "
-                        "Try to manually delete the file to recover from the error. Your user profiles will not be affected.")) +
-                "\n\n" + AppConfig::config_path() + "\n\n" + ex.what());
-            */
             return ex.what();
         }
     }

src/libslic3r/Arachne/SkeletalTrapezoidation.cpp

@@ -522,44 +522,6 @@ static bool has_missing_twin_edge(const SkeletalTrapezoidationGraph &graph)
     return false;
 }
 
-inline static std::unordered_map<Point, Point, PointHash> try_to_fix_degenerated_voronoi_diagram_by_rotation(
-    Geometry::VoronoiDiagram                     &voronoi_diagram,
-    const Polygons                               &polys,
-    Polygons                                     &polys_rotated,
-    std::vector<SkeletalTrapezoidation::Segment> &segments,
-    const double                                  fix_angle)
-{
-    std::unordered_map<Point, Point, PointHash> vertex_mapping;
-    for (Polygon &poly : polys_rotated)
-        poly.rotate(fix_angle);
-
-    assert(polys_rotated.size() == polys.size());
-    for (size_t poly_idx = 0; poly_idx < polys.size(); ++poly_idx) {
-        assert(polys_rotated[poly_idx].size() == polys[poly_idx].size());
-        for (size_t point_idx = 0; point_idx < polys[poly_idx].size(); ++point_idx)
-            vertex_mapping.insert({polys_rotated[poly_idx][point_idx], polys[poly_idx][point_idx]});
-    }
-
-    segments.clear();
-    for (size_t poly_idx = 0; poly_idx < polys_rotated.size(); poly_idx++)
-        for (size_t point_idx = 0; point_idx < polys_rotated[poly_idx].size(); point_idx++)
-            segments.emplace_back(&polys_rotated, poly_idx, point_idx);
-
-    voronoi_diagram.clear();
-    construct_voronoi(segments.begin(), segments.end(), &voronoi_diagram);
-
-#ifdef ARACHNE_DEBUG_VORONOI
-    {
-        static int iRun = 0;
-        dump_voronoi_to_svg(debug_out_path("arachne_voronoi-diagram-rotated-%d.svg", iRun++).c_str(), voronoi_diagram, to_points(polys), to_lines(polys));
-    }
-#endif
-
-    assert(Geometry::VoronoiUtilsCgal::is_voronoi_diagram_planar_intersection(voronoi_diagram));
-
-    return vertex_mapping;
-}
-
 inline static void rotate_back_skeletal_trapezoidation_graph_after_fix(SkeletalTrapezoidationGraph                       &graph,
                                                                        const double                                       fix_angle,
                                                                        const std::unordered_map<Point, Point, PointHash> &vertex_mapping)
@@ -626,6 +588,56 @@ VoronoiDiagramStatus detect_voronoi_diagram_known_issues(const Geometry::Voronoi
     return VoronoiDiagramStatus::NO_ISSUE_DETECTED;
 }
 
+inline static std::pair<std::unordered_map<Point, Point, PointHash>, double> try_to_fix_degenerated_voronoi_diagram_by_rotation(
+    Geometry::VoronoiDiagram                     &voronoi_diagram,
+    const Polygons                               &polys,
+    Polygons                                     &polys_rotated,
+    std::vector<SkeletalTrapezoidation::Segment> &segments,
+    const std::vector<double>                    &fix_angles)
+{
+    const Polygons                              polys_rotated_original = polys_rotated;
+    double                                      fixed_by_angle         = fix_angles.front();
+    std::unordered_map<Point, Point, PointHash> vertex_mapping;
+
+    for (const double &fix_angle : fix_angles) {
+        vertex_mapping.clear();
+        polys_rotated  = polys_rotated_original;
+        fixed_by_angle = fix_angle;
+
+        for (Polygon &poly : polys_rotated)
+            poly.rotate(fix_angle);
+
+        assert(polys_rotated.size() == polys.size());
+        for (size_t poly_idx = 0; poly_idx < polys.size(); ++poly_idx) {
+            assert(polys_rotated[poly_idx].size() == polys[poly_idx].size());
+            for (size_t point_idx = 0; point_idx < polys[poly_idx].size(); ++point_idx)
+                vertex_mapping.insert({polys_rotated[poly_idx][point_idx], polys[poly_idx][point_idx]});
+        }
+
+        segments.clear();
+        for (size_t poly_idx = 0; poly_idx < polys_rotated.size(); poly_idx++)
+            for (size_t point_idx = 0; point_idx < polys_rotated[poly_idx].size(); point_idx++)
+                segments.emplace_back(&polys_rotated, poly_idx, point_idx);
+
+        voronoi_diagram.clear();
+        construct_voronoi(segments.begin(), segments.end(), &voronoi_diagram);
+
+#ifdef ARACHNE_DEBUG_VORONOI
+        {
+            static int iRun = 0;
+            dump_voronoi_to_svg(debug_out_path("arachne_voronoi-diagram-rotated-%d.svg", iRun++).c_str(), voronoi_diagram, to_points(polys), to_lines(polys));
+        }
+#endif
+
+        if (detect_voronoi_diagram_known_issues(voronoi_diagram, segments) == VoronoiDiagramStatus::NO_ISSUE_DETECTED)
+            break;
+    }
+
+    assert(Geometry::VoronoiUtilsCgal::is_voronoi_diagram_planar_intersection(voronoi_diagram));
+
+    return {vertex_mapping, fixed_by_angle};
+}
+
 void SkeletalTrapezoidation::constructFromPolygons(const Polygons& polys)
 {
 #ifdef ARACHNE_DEBUG
@@ -670,7 +682,8 @@ void SkeletalTrapezoidation::constructFromPolygons(const Polygons& polys)
     // When any Voronoi vertex is missing, the Voronoi diagram is not planar, or some voronoi edge is
     // intersecting input segment, rotate the input polygon and try again.
     VoronoiDiagramStatus      status         = detect_voronoi_diagram_known_issues(voronoi_diagram, segments);
-    const double         fix_angle = PI / 6;
+    const std::vector<double> fix_angles     = {PI / 6, PI / 5, PI / 7, PI / 11};
+    double                    fixed_by_angle = fix_angles.front();
 
     std::unordered_map<Point, Point, PointHash> vertex_mapping;
     // polys_copy is referenced through items stored in the std::vector segments.
@@ -683,16 +696,15 @@ void SkeletalTrapezoidation::constructFromPolygons(const Polygons& polys)
         else if (status == VoronoiDiagramStatus::VORONOI_EDGE_INTERSECTING_INPUT_SEGMENT)
             BOOST_LOG_TRIVIAL(warning) << "Detected Voronoi edge intersecting input segment, input polygons will be rotated back and forth.";
 
-        vertex_mapping = try_to_fix_degenerated_voronoi_diagram_by_rotation(voronoi_diagram, polys, polys_copy, segments, fix_angle);
+        std::tie(vertex_mapping, fixed_by_angle) = try_to_fix_degenerated_voronoi_diagram_by_rotation(voronoi_diagram, polys, polys_copy, segments, fix_angles);
 
-        assert(!detect_missing_voronoi_vertex(voronoi_diagram, segments));
+        VoronoiDiagramStatus status_after_fix = detect_voronoi_diagram_known_issues(voronoi_diagram, segments);
-        assert(Geometry::VoronoiUtilsCgal::is_voronoi_diagram_planar_angle(voronoi_diagram, segments));
+        assert(status_after_fix == VoronoiDiagramStatus::NO_ISSUE_DETECTED);
-        assert(!detect_voronoi_edge_intersecting_input_segment(voronoi_diagram, segments));
+        if (status_after_fix == VoronoiDiagramStatus::MISSING_VORONOI_VERTEX)
-        if (detect_missing_voronoi_vertex(voronoi_diagram, segments))
             BOOST_LOG_TRIVIAL(error) << "Detected missing Voronoi vertex even after the rotation of input.";
-        else if (!Geometry::VoronoiUtilsCgal::is_voronoi_diagram_planar_angle(voronoi_diagram, segments))
+        else if (status_after_fix == VoronoiDiagramStatus::NON_PLANAR_VORONOI_DIAGRAM)
             BOOST_LOG_TRIVIAL(error) << "Detected non-planar Voronoi diagram even after the rotation of input.";
-        else if (detect_voronoi_edge_intersecting_input_segment(voronoi_diagram, segments))
+        else if (status_after_fix == VoronoiDiagramStatus::VORONOI_EDGE_INTERSECTING_INPUT_SEGMENT)
             BOOST_LOG_TRIVIAL(error) << "Detected Voronoi edge intersecting input segment even after the rotation of input.";
     }
 
@@ -760,7 +772,7 @@ process_voronoi_diagram:
     if (status == VoronoiDiagramStatus::NO_ISSUE_DETECTED && has_missing_twin_edge(this->graph)) {
         BOOST_LOG_TRIVIAL(warning) << "Detected degenerated Voronoi diagram, input polygons will be rotated back and forth.";
         status                                   = VoronoiDiagramStatus::OTHER_TYPE_OF_VORONOI_DIAGRAM_DEGENERATION;
-        vertex_mapping = try_to_fix_degenerated_voronoi_diagram_by_rotation(voronoi_diagram, polys, polys_copy, segments, fix_angle);
+        std::tie(vertex_mapping, fixed_by_angle) = try_to_fix_degenerated_voronoi_diagram_by_rotation(voronoi_diagram, polys, polys_copy, segments, fix_angles);
 
         assert(!detect_missing_voronoi_vertex(voronoi_diagram, segments));
         if (detect_missing_voronoi_vertex(voronoi_diagram, segments))
@@ -784,7 +796,7 @@ process_voronoi_diagram:
     }
 
     if (status != VoronoiDiagramStatus::NO_ISSUE_DETECTED)
-        rotate_back_skeletal_trapezoidation_graph_after_fix(this->graph, fix_angle, vertex_mapping);
+        rotate_back_skeletal_trapezoidation_graph_after_fix(this->graph, fixed_by_angle, vertex_mapping);
 
 #ifdef ARACHNE_DEBUG
     assert(Geometry::VoronoiUtilsCgal::is_voronoi_diagram_planar_intersection(voronoi_diagram));

src/libslic3r/Arrange.cpp

@@ -583,8 +583,12 @@ static void process_arrangeable(const ArrangePolygon &arrpoly,
     outp.emplace_back(std::move(p));
     outp.back().rotation(rotation);
     outp.back().translation({offs.x(), offs.y()});
+    outp.back().inflate(arrpoly.inflation);
     outp.back().binId(arrpoly.bed_idx);
     outp.back().priority(arrpoly.priority);
+    outp.back().setOnPackedFn([&arrpoly](Item &itm){
+        itm.inflate(-arrpoly.inflation);
+    });
 }
 
 template<class Fn> auto call_with_bed(const Points &bed, Fn &&fn)

src/libslic3r/Emboss.cpp

@@ -1264,15 +1264,17 @@ ExPolygons Emboss::text2shapes(FontFileWithCache    &font_with_cache,
     return result;
 }
 
-void Emboss::apply_transformation(const FontProp &font_prop,
+void Emboss::apply_transformation(const FontProp &font_prop, Transform3d &transformation){
-                                  Transform3d    &transformation)
+    apply_transformation(font_prop.angle, font_prop.distance, transformation);
-{
+}
-    if (font_prop.angle.has_value()) {
+
-        double angle_z = *font_prop.angle;
+void Emboss::apply_transformation(const std::optional<float>& angle, const std::optional<float>& distance, Transform3d &transformation) {
+    if (angle.has_value()) {
+        double angle_z = *angle;
         transformation *= Eigen::AngleAxisd(angle_z, Vec3d::UnitZ());
     }
-    if (font_prop.distance.has_value()) {
+    if (distance.has_value()) {
-        Vec3d translate = Vec3d::UnitZ() * (*font_prop.distance);
+        Vec3d translate = Vec3d::UnitZ() * (*distance);
         transformation.translate(translate);
     }
 }
@@ -1540,60 +1542,95 @@ std::optional<Vec2d> Emboss::ProjectZ::unproject(const Vec3d &p, double *depth)
     return Vec2d(p.x() / SHAPE_SCALE, p.y() / SHAPE_SCALE);
 }
 
-Transform3d Emboss::create_transformation_onto_surface(const Vec3f &position,
+
-                                                       const Vec3f &normal,
+Vec3d Emboss::suggest_up(const Vec3d normal, double up_limit) 
-                                                       float        up_limit)
 {
-    // up and emboss direction for generated model
+    // Normal must be 1
-    Vec3d text_up_dir     = Vec3d::UnitY();
+    assert(is_approx(normal.squaredNorm(), 1.));
-    Vec3d text_emboss_dir = Vec3d::UnitZ();
 
     // wanted up direction of result
-    Vec3d wanted_up_side = Vec3d::UnitZ();
+    Vec3d wanted_up_side = 
-    if (std::fabs(normal.z()) > up_limit) wanted_up_side = Vec3d::UnitY();
+        (std::fabs(normal.z()) > up_limit)?
-
+        Vec3d::UnitY() : Vec3d::UnitZ();
-    Vec3d wanted_emboss_dir = normal.cast<double>();
-    // after cast from float it needs to be normalized again
-    wanted_emboss_dir.normalize(); 
 
     // create perpendicular unit vector to surface triangle normal vector
     // lay on surface of triangle and define up vector for text
-    Vec3d wanted_up_dir = wanted_emboss_dir
+    Vec3d wanted_up_dir = normal.cross(wanted_up_side).cross(normal);
-        .cross(wanted_up_side)
-        .cross(wanted_emboss_dir);
     // normal3d is NOT perpendicular to normal_up_dir
     wanted_up_dir.normalize();
 
+    return wanted_up_dir;
+}
+
+std::optional<float> Emboss::calc_up(const Transform3d &tr, double up_limit)
+{
+    auto tr_linear = tr.linear();
+    // z base of transformation ( tr * UnitZ )
+    Vec3d normal = tr_linear.col(2);
+    // scaled matrix has base with different size
+    normal.normalize();
+    Vec3d suggested = suggest_up(normal);
+    assert(is_approx(suggested.squaredNorm(), 1.));
+
+    Vec3d up = tr_linear.col(1); // tr * UnitY()
+    up.normalize();
+    
+    double dot = suggested.dot(up);
+    if (dot >= 1. || dot <= -1.)
+        return {}; // zero angle
+
+    Matrix3d m;
+    m.row(0) = up;
+    m.row(1) = suggested;
+    m.row(2) = normal;
+    double det = m.determinant();
+
+    return -atan2(det, dot);
+}
+
+Transform3d Emboss::create_transformation_onto_surface(const Vec3d &position,
+                                                       const Vec3d &normal,
+                                                       double       up_limit)
+{
+    // is normalized ?
+    assert(is_approx(normal.squaredNorm(), 1.));
+
+    // up and emboss direction for generated model
+    Vec3d up_dir     = Vec3d::UnitY();
+    Vec3d emboss_dir = Vec3d::UnitZ();
+
+    // after cast from float it needs to be normalized again
+    Vec3d wanted_up_dir = suggest_up(normal, up_limit);
+
     // perpendicular to emboss vector of text and normal
     Vec3d axis_view;
     double angle_view;
-    if (wanted_emboss_dir == -Vec3d::UnitZ()) {
+    if (normal == -Vec3d::UnitZ()) {
         // text_emboss_dir has opposit direction to wanted_emboss_dir
         axis_view = Vec3d::UnitY();
         angle_view = M_PI;
     } else {
-        axis_view = text_emboss_dir.cross(wanted_emboss_dir);
+        axis_view = emboss_dir.cross(normal);
-        angle_view = std::acos(text_emboss_dir.dot(wanted_emboss_dir)); // in rad
+        angle_view = std::acos(emboss_dir.dot(normal)); // in rad
         axis_view.normalize();
     }
 
     Eigen::AngleAxis view_rot(angle_view, axis_view);
     Vec3d wanterd_up_rotated = view_rot.matrix().inverse() * wanted_up_dir;
     wanterd_up_rotated.normalize();
-    double angle_up = std::acos(text_up_dir.dot(wanterd_up_rotated));
+    double angle_up = std::acos(up_dir.dot(wanterd_up_rotated));
 
-    // text_view and text_view2 should have same direction
+    Vec3d text_view = up_dir.cross(wanterd_up_rotated);
-    Vec3d text_view2 = text_up_dir.cross(wanterd_up_rotated);
+    Vec3d diff_view  = emboss_dir - text_view;
-    Vec3d diff_view  = text_emboss_dir - text_view2;
     if (std::fabs(diff_view.x()) > 1. ||
         std::fabs(diff_view.y()) > 1. ||
         std::fabs(diff_view.z()) > 1.) // oposit direction
         angle_up *= -1.;
 
-    Eigen::AngleAxis up_rot(angle_up, text_emboss_dir);
+    Eigen::AngleAxis up_rot(angle_up, emboss_dir);
 
     Transform3d transform = Transform3d::Identity();
-    transform.translate(position.cast<double>());
+    transform.translate(position);
     transform.rotate(view_rot);
     transform.rotate(up_rot);
     return transform;

src/libslic3r/Emboss.hpp

@@ -193,6 +193,7 @@ namespace Emboss
     /// Z-rotation as angle to Y axis(FontProp::angle)</param>
     /// <param name="transformation">In / Out transformation to modify by property</param>
     void apply_transformation(const FontProp &font_prop, Transform3d &transformation);
+    void apply_transformation(const std::optional<float> &angle, const std::optional<float> &distance, Transform3d &transformation);
 
     /// <summary>
     /// Read information from naming table of font file
@@ -274,6 +275,22 @@ namespace Emboss
     /// <returns>Projected shape into space</returns>
     indexed_triangle_set polygons2model(const ExPolygons &shape2d, const IProjection& projection);
     
+    /// <summary>
+    /// Suggest wanted up vector of embossed text by emboss direction
+    /// </summary>
+    /// <param name="normal">Normalized vector of emboss direction in world</param>
+    /// <param name="up_limit">Is compared with normal.z to suggest up direction</param>
+    /// <returns>Wanted up vector</returns>
+    Vec3d suggest_up(const Vec3d normal, double up_limit = 0.9);
+        
+    /// <summary>
+    /// By transformation calculate angle between suggested and actual up vector
+    /// </summary>
+    /// <param name="tr">Transformation of embossed volume in world</param>
+    /// <param name="up_limit">Is compared with normal.z to suggest up direction</param>
+    /// <returns>Rotation of suggested up-vector[in rad] in the range [-Pi, Pi], When rotation is not zero</returns>
+    std::optional<float> calc_up(const Transform3d &tr, double up_limit = 0.9);
+
     /// <summary>
     /// Create transformation for emboss text object to lay on surface point
     /// </summary>
@@ -282,7 +299,7 @@ namespace Emboss
     /// <param name="up_limit">Is compared with normal.z to suggest up direction</param>
     /// <returns>Transformation onto surface point</returns>
     Transform3d create_transformation_onto_surface(
-        const Vec3f &position, const Vec3f &normal, float up_limit = 0.9f);
+        const Vec3d &position, const Vec3d &normal, double up_limit = 0.9);
 
     class ProjectZ : public IProjection
     {

src/libslic3r/Extruder.cpp

@@ -37,6 +37,7 @@ std::pair<double, double> Extruder::extrude(double dE)
    value supplied will overwrite the previous one if any. */
 std::pair<double, double> Extruder::retract(double retract_length, double restart_extra)
 {
+    assert(restart_extra >= 0);
     // in case of relative E distances we always reset to 0 before any output
     if (m_config->use_relative_e_distances)
         m_E = 0.;
@@ -64,6 +65,24 @@ std::pair<double, double> Extruder::unretract()
     return std::make_pair(dE, emitE);
 }
 
+// Setting the retract state from the script.
+// Sets current retraction value & restart extra filament amount if retracted > 0.
+void Extruder::set_retracted(double retracted, double restart_extra)
+{
+    if (retracted < - EPSILON)
+        throw Slic3r::RuntimeError("Custom G-code reports negative z_retracted.");
+    if (restart_extra < - EPSILON)
+        throw Slic3r::RuntimeError("Custom G-code reports negative z_restart_extra.");
+
+    if (retracted > EPSILON) {
+        m_retracted     = retracted;
+        m_restart_extra = restart_extra < EPSILON ? 0 : restart_extra;
+    } else {
+        m_retracted     = 0;
+        m_restart_extra = 0;
+    }
+}
+
 // Used filament volume in mm^3.
 double Extruder::extruded_volume() const
 {

src/libslic3r/Extruder.hpp

@@ -37,6 +37,19 @@ public:
     // Used filament length in mm.
     double used_filament() const;
 
+    // Getters for the PlaceholderParser.
+    // Get current extruder position. Only applicable with absolute extruder addressing.
+    double position() const { return m_E; }
+    // Get current retraction value. Only non-negative values.
+    double retracted() const { return m_retracted; }
+    // Get extra retraction planned after
+    double restart_extra() const { return m_restart_extra; }
+    // Setters for the PlaceholderParser.
+    // Set current extruder position. Only applicable with absolute extruder addressing.
+    void   set_position(double e) { m_E = e; }
+    // Sets current retraction value & restart extra filament amount if retracted > 0.
+    void   set_retracted(double retracted, double restart_extra);
+    
     double filament_diameter() const;
     double filament_crossection() const { return this->filament_diameter() * this->filament_diameter() * 0.25 * PI; }
     double filament_density() const;

src/libslic3r/ExtrusionRole.cpp

@@ -1,10 +1,10 @@
 #include "ExtrusionRole.hpp"
+#include "I18N.hpp"
 
 #include <string>
 #include <string_view>
 #include <cassert>
 
-#define L(s) (s)
 
 namespace Slic3r {
 

src/libslic3r/Fill/Fill.cpp

@@ -16,6 +16,7 @@
 #include "FillLightning.hpp"
 #include "FillConcentric.hpp"
 #include "FillEnsuring.hpp"
+#include "Polygon.hpp"
 
 namespace Slic3r {
 
@@ -486,14 +487,6 @@ void Layer::make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive:
 
 	size_t first_object_layer_id = this->object()->get_layer(0)->id();
     for (SurfaceFill &surface_fill : surface_fills) {
-		//skip patterns for which additional input is nullptr
-		switch (surface_fill.params.pattern) {
-			case ipLightning: if (lightning_generator == nullptr) continue; break;
-			case ipAdaptiveCubic: if (adaptive_fill_octree == nullptr) continue; break;
-			case ipSupportCubic: if (support_fill_octree == nullptr) continue; break;
-			default: break;
-		}
-
         // Create the filler object.
         std::unique_ptr<Fill> f = std::unique_ptr<Fill>(Fill::new_from_type(surface_fill.params.pattern));
         f->set_bounding_box(bbox);
@@ -647,7 +640,7 @@ void Layer::make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive:
 #endif
 }
 
-Polylines Layer::generate_sparse_infill_polylines_for_anchoring() const
+Polylines Layer::generate_sparse_infill_polylines_for_anchoring(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive::Octree* support_fill_octree,  FillLightning::Generator* lightning_generator) const
 {
     std::vector<SurfaceFill>  surface_fills = group_fills(*this);
     const Slic3r::BoundingBox bbox          = this->object()->bounding_box();
@@ -656,14 +649,17 @@ Polylines Layer::generate_sparse_infill_polylines_for_anchoring() const
     Polylines sparse_infill_polylines{};
 
     for (SurfaceFill &surface_fill : surface_fills) {
-        // skip patterns for which additional input is nullptr
+		if (surface_fill.surface.surface_type != stInternal) {
+			continue;
+		}
+
         switch (surface_fill.params.pattern) {
-        case ipLightning: continue; break;
-        case ipAdaptiveCubic: continue; break;
-        case ipSupportCubic: continue; break;
         case ipCount: continue; break;
         case ipSupportBase: continue; break;
         case ipEnsuring: continue; break;
+        case ipLightning:
+		case ipAdaptiveCubic:
+        case ipSupportCubic:
         case ipRectilinear:
         case ipMonotonic:
         case ipMonotonicLines:
@@ -688,10 +684,16 @@ Polylines Layer::generate_sparse_infill_polylines_for_anchoring() const
         f->layer_id = this->id();
         f->z        = this->print_z;
         f->angle    = surface_fill.params.angle;
-        // f->adapt_fill_octree   = (surface_fill.params.pattern == ipSupportCubic) ? support_fill_octree : adaptive_fill_octree;
+        f->adapt_fill_octree   = (surface_fill.params.pattern == ipSupportCubic) ? support_fill_octree : adaptive_fill_octree;
         f->print_config        = &this->object()->print()->config();
         f->print_object_config = &this->object()->config();
 
+        if (surface_fill.params.pattern == ipLightning) {
+            auto *lf            = dynamic_cast<FillLightning::Filler *>(f.get());
+            lf->generator       = lightning_generator;
+            lf->num_raft_layers = this->object()->slicing_parameters().raft_layers();
+        }
+
         // calculate flow spacing for infill pattern generation
         double link_max_length = 0.;
         if (!surface_fill.params.bridge) {

src/libslic3r/Flow.cpp

@@ -6,9 +6,6 @@
 
 #include <boost/algorithm/string/predicate.hpp>
 
-// Mark string for localization and translate.
-#define L(s) Slic3r::I18N::translate(s)
-
 namespace Slic3r {
 
 FlowErrorNegativeSpacing::FlowErrorNegativeSpacing() : 
@@ -58,7 +55,7 @@ static inline FlowRole opt_key_to_flow_role(const std::string &opt_key)
 
 static inline void throw_on_missing_variable(const std::string &opt_key, const char *dependent_opt_key) 
 {
-	throw FlowErrorMissingVariable((boost::format(L("Cannot calculate extrusion width for %1%: Variable \"%2%\" not accessible.")) % opt_key % dependent_opt_key).str());
+	throw FlowErrorMissingVariable((boost::format(_u8L("Cannot calculate extrusion width for %1%: Variable \"%2%\" not accessible.")) % opt_key % dependent_opt_key).str());
 }
 
 // Used to provide hints to the user on default extrusion width values, and to provide reasonable values to the PlaceholderParser.

src/libslic3r/Format/3mf.cpp

@@ -296,11 +296,6 @@ bool is_valid_object_type(const std::string& type)
 
 namespace Slic3r {
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) (s)
-#define _(s) Slic3r::I18N::translate(s)
-
     // Base class with error messages management
     class _3MF_Base
     {
@@ -957,7 +952,7 @@ namespace Slic3r {
 
         try
         {
-            res = mz_zip_reader_extract_file_to_callback(&archive, stat.m_filename, [](void* pOpaque, mz_uint64 file_ofs, const void* pBuf, size_t n)->size_t {
+            res = mz_zip_reader_extract_to_callback(&archive, stat.m_file_index, [](void* pOpaque, mz_uint64 file_ofs, const void* pBuf, size_t n)->size_t {
                 CallbackData* data = (CallbackData*)pOpaque;
                 if (!XML_Parse(data->parser, (const char*)pBuf, (int)n, (file_ofs + n == data->stat.m_uncomp_size) ? 1 : 0) || data->importer.parse_error()) {
                     char error_buf[1024];
@@ -991,7 +986,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading cut information data to buffer");
                 return;
@@ -1053,7 +1048,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading config data to buffer");
                 return;
@@ -1073,7 +1068,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading layer heights profile data to buffer");
                 return;
@@ -1135,7 +1130,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading layer config ranges data to buffer");
                 return;
@@ -1192,7 +1187,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading sla support points data to buffer");
                 return;
@@ -1274,7 +1269,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer(size_t(stat.m_uncomp_size), 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading sla support points data to buffer");
                 return;
@@ -1379,7 +1374,7 @@ namespace Slic3r {
             return false;
         }
 
-        mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, parser_buffer, (size_t)stat.m_uncomp_size, 0);
+        mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, parser_buffer, (size_t)stat.m_uncomp_size, 0);
         if (res == 0) {
             add_error("Error while reading config data to buffer");
             return false;
@@ -1399,7 +1394,7 @@ namespace Slic3r {
     {
         if (stat.m_uncomp_size > 0) {
             std::string buffer((size_t)stat.m_uncomp_size, 0);
-            mz_bool res = mz_zip_reader_extract_file_to_mem(&archive, stat.m_filename, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
+            mz_bool res = mz_zip_reader_extract_to_mem(&archive, stat.m_file_index, (void*)buffer.data(), (size_t)stat.m_uncomp_size, 0);
             if (res == 0) {
                 add_error("Error while reading custom Gcodes per height data to buffer");
                 return;
@@ -1875,9 +1870,9 @@ namespace Slic3r {
         if (m_curr_metadata_name == SLIC3RPE_3MF_VERSION) {
             m_version = (unsigned int)atoi(m_curr_characters.c_str());
             if (m_check_version && (m_version > VERSION_3MF_COMPATIBLE)) {
-                // std::string msg = _(L("The selected 3mf file has been saved with a newer version of " + std::string(SLIC3R_APP_NAME) + " and is not compatible."));
+                // std::string msg = _u8L("The selected 3mf file has been saved with a newer version of " + std::string(SLIC3R_APP_NAME) + " and is not compatible.");
                 // throw version_error(msg.c_str());
-                const std::string msg = (boost::format(_(L("The selected 3mf file has been saved with a newer version of %1% and is not compatible."))) % std::string(SLIC3R_APP_NAME)).str();
+                const std::string msg = (boost::format(_u8L("The selected 3mf file has been saved with a newer version of %1% and is not compatible.")) % std::string(SLIC3R_APP_NAME)).str();
                 throw version_error(msg);
             }
         } else if (m_curr_metadata_name == "Application") {
@@ -1888,15 +1883,15 @@ namespace Slic3r {
         } else if (m_curr_metadata_name == SLIC3RPE_FDM_SUPPORTS_PAINTING_VERSION) {
             m_fdm_supports_painting_version = (unsigned int) atoi(m_curr_characters.c_str());
             check_painting_version(m_fdm_supports_painting_version, FDM_SUPPORTS_PAINTING_VERSION,
-                _(L("The selected 3MF contains FDM supports painted object using a newer version of PrusaSlicer and is not compatible.")));
+                _u8L("The selected 3MF contains FDM supports painted object using a newer version of PrusaSlicer and is not compatible."));
         } else if (m_curr_metadata_name == SLIC3RPE_SEAM_PAINTING_VERSION) {
             m_seam_painting_version = (unsigned int) atoi(m_curr_characters.c_str());
             check_painting_version(m_seam_painting_version, SEAM_PAINTING_VERSION,
-                _(L("The selected 3MF contains seam painted object using a newer version of PrusaSlicer and is not compatible.")));
+                _u8L("The selected 3MF contains seam painted object using a newer version of PrusaSlicer and is not compatible."));
         } else if (m_curr_metadata_name == SLIC3RPE_MM_PAINTING_VERSION) {
             m_mm_painting_version = (unsigned int) atoi(m_curr_characters.c_str());
             check_painting_version(m_mm_painting_version, MM_PAINTING_VERSION,
-                _(L("The selected 3MF contains multi-material painted object using a newer version of PrusaSlicer and is not compatible.")));
+                _u8L("The selected 3MF contains multi-material painted object using a newer version of PrusaSlicer and is not compatible."));
         }
 
         return true;
@@ -2963,6 +2958,8 @@ namespace Slic3r {
 
         unsigned int object_cnt = 0;
         for (const ModelObject* object : model.objects) {
+            if (!object->is_cut())
+                continue;
             object_cnt++;
             pt::ptree& obj_tree = tree.add("objects.object", "");
 

src/libslic3r/Format/AMF.cpp

@@ -57,10 +57,6 @@ const char* SLIC3R_CONFIG_TYPE = "slic3rpe_config";
 namespace Slic3r
 {
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) (s)
-#define _(s) Slic3r::I18N::translate(s)
 
 struct AMFParserContext
 {
@@ -965,7 +961,7 @@ bool extract_model_from_archive(mz_zip_archive& archive, const mz_zip_archive_fi
 
     try
     {
-        res = mz_zip_reader_extract_file_to_callback(&archive, stat.m_filename, [](void* pOpaque, mz_uint64 file_ofs, const void* pBuf, size_t n)->size_t {
+        res = mz_zip_reader_extract_to_callback(&archive, stat.m_file_index, [](void* pOpaque, mz_uint64 file_ofs, const void* pBuf, size_t n)->size_t {
             CallbackData* data = (CallbackData*)pOpaque;
             if (!XML_Parse(data->parser, (const char*)pBuf, (int)n, (file_ofs + n == data->stat.m_uncomp_size) ? 1 : 0) || data->ctx.error())
             {
@@ -997,7 +993,7 @@ bool extract_model_from_archive(mz_zip_archive& archive, const mz_zip_archive_fi
     {
         // std::string msg = _(L("The selected amf file has been saved with a newer version of " + std::string(SLIC3R_APP_NAME) + " and is not compatible."));
         // throw Slic3r::FileIOError(msg.c_str());
-        const std::string msg = (boost::format(_(L("The selected amf file has been saved with a newer version of %1% and is not compatible."))) % std::string(SLIC3R_APP_NAME)).str();
+        const std::string msg = (boost::format(_u8L("The selected amf file has been saved with a newer version of %1% and is not compatible.")) % std::string(SLIC3R_APP_NAME)).str();
         throw Slic3r::FileIOError(msg);
     }
 

src/libslic3r/Format/SLAArchiveReader.cpp

@@ -1,13 +1,13 @@
 #include "SLAArchiveReader.hpp"
 #include "SL1.hpp"
 #include "SL1_SVG.hpp"
+#include "I18N.hpp"
 
 #include "libslic3r/SlicesToTriangleMesh.hpp"
 
 #include <boost/filesystem/path.hpp>
 #include <boost/algorithm/string.hpp>
 
-constexpr const char * L(const char * str) { return str; }
 
 #include <array>
 #include <map>
@@ -37,8 +37,8 @@ static const std::map<std::string, ArchiveEntry> REGISTERED_ARCHIVES {
          [] (const std::string &fname, SLAImportQuality quality, const ProgrFn &progr) { return std::make_unique<SL1Reader>(fname, quality, progr); } }
     },
     {
-        "SL2",
+        "SL1SVG",
-        { L("SL2 archive files"), {"sl2", "sl1_svg"/*, "zip"*/}, // also a zip but unnecessary hassle to implement single extension for multiple archives
+        { L("SL1SVG archive files"), {"sl1_svg"/*, "zip"*/}, // also a zip but unnecessary hassle to implement single extension for multiple archives
          [] (const std::string &fname, SLAImportQuality quality, const ProgrFn &progr) { return std::make_unique<SL1_SVGReader>(fname, quality, progr); }}
     },
     // TODO: pwmx and future others.

src/libslic3r/Format/SLAArchiveWriter.cpp

@@ -25,9 +25,13 @@ static const std::map<std::string, ArchiveEntry> REGISTERED_ARCHIVES {
         "SL1",
         { "sl1",  [] (const auto &cfg) { return std::make_unique<SL1Archive>(cfg); } }
     },
+    {
+        "SL1SVG",
+        { "sl1_svg",  [] (const auto &cfg) { return std::make_unique<SL1_SVGArchive>(cfg); } }
+    },
     {
         "SL2",
-        { "sl2",  [] (const auto &cfg) { return std::make_unique<SL1_SVGArchive>(cfg); } }
+        { "sl1_svg",  [] (const auto &cfg) { return std::make_unique<SL1_SVGArchive>(cfg); } }
     },
     {
         "pwmx",

src/libslic3r/Format/ZipperArchiveImport.cpp

@@ -18,7 +18,7 @@ boost::property_tree::ptree read_ini(const mz_zip_archive_file_stat &entry,
 {
     std::string buf(size_t(entry.m_uncomp_size), '\0');
 
-    if (!mz_zip_reader_extract_file_to_mem(&zip.arch, entry.m_filename,
+    if (!mz_zip_reader_extract_to_mem(&zip.arch, entry.m_file_index,
                                            buf.data(), buf.size(), 0))
         throw Slic3r::FileIOError(zip.get_errorstr());
 
@@ -35,7 +35,7 @@ EntryBuffer read_entry(const mz_zip_archive_file_stat &entry,
 {
     std::vector<uint8_t> buf(entry.m_uncomp_size);
 
-    if (!mz_zip_reader_extract_file_to_mem(&zip.arch, entry.m_filename,
+    if (!mz_zip_reader_extract_to_mem(&zip.arch, entry.m_file_index,
                                            buf.data(), buf.size(), 0))
         throw Slic3r::FileIOError(zip.get_errorstr());
 

src/libslic3r/GCode.cpp

@@ -71,11 +71,6 @@ using namespace std::literals::string_view_literals;
 
 namespace Slic3r {
 
-    //! macro used to mark string used at localization,
-    //! return same string
-#define L(s) (s)
-#define _(s) Slic3r::I18N::translate(s)
-
 // Only add a newline in case the current G-code does not end with a newline.
     static inline void check_add_eol(std::string& gcode)
     {
@@ -424,7 +419,7 @@ namespace Slic3r {
     std::string WipeTowerIntegration::finalize(GCode& gcodegen)
     {
         std::string gcode;
-        if (std::abs(gcodegen.writer().get_position()(2) - m_final_purge.print_z) > EPSILON)
+        if (std::abs(gcodegen.writer().get_position().z() - m_final_purge.print_z) > EPSILON)
             gcode += gcodegen.change_layer(m_final_purge.print_z);
         gcode += append_tcr(gcodegen, m_final_purge, -1);
         return gcode;
@@ -434,6 +429,91 @@ namespace Slic3r {
 
 #define EXTRUDER_CONFIG(OPT) m_config.OPT.get_at(m_writer.extruder()->id())
 
+void GCode::PlaceholderParserIntegration::reset()
+{
+    this->failed_templates.clear();
+    this->output_config.clear();
+    this->opt_position = nullptr;
+    this->opt_zhop      = nullptr;
+    this->opt_e_position = nullptr;
+    this->opt_e_retracted = nullptr;
+    this->opt_e_restart_extra = nullptr;
+    this->num_extruders = 0;
+    this->position.clear();
+    this->e_position.clear();
+    this->e_retracted.clear();
+    this->e_restart_extra.clear();
+}
+
+void GCode::PlaceholderParserIntegration::init(const GCodeWriter &writer)
+{
+    this->reset();
+    const std::vector<Extruder> &extruders = writer.extruders();
+    if (! extruders.empty()) {
+        this->num_extruders = extruders.back().id() + 1;
+        this->e_retracted.assign(num_extruders, 0);
+        this->e_restart_extra.assign(num_extruders, 0);
+        this->opt_e_retracted = new ConfigOptionFloats(e_retracted);
+        this->opt_e_restart_extra = new ConfigOptionFloats(e_restart_extra);
+        this->output_config.set_key_value("e_retracted", this->opt_e_retracted);
+        this->output_config.set_key_value("e_restart_extra", this->opt_e_restart_extra);
+        if (! writer.config.use_relative_e_distances) {
+            e_position.assign(num_extruders, 0);
+            opt_e_position = new ConfigOptionFloats(e_position);
+            this->output_config.set_key_value("e_position", opt_e_position);
+        }
+    }
+
+    // Reserve buffer for current position.
+    this->position.assign(3, 0);
+    this->opt_position = new ConfigOptionFloats(this->position);
+    this->output_config.set_key_value("position", this->opt_position);
+    // Store zhop variable into the parser itself, it is a read-only variable to the script.
+    this->opt_zhop = new ConfigOptionFloat(writer.get_zhop());
+    this->parser.set("zhop", this->opt_zhop);
+}
+
+void GCode::PlaceholderParserIntegration::update_from_gcodewriter(const GCodeWriter &writer)
+{
+    memcpy(this->position.data(), writer.get_position().data(), sizeof(double) * 3);
+    this->opt_position->values = this->position;
+    this->opt_zhop->value = writer.get_zhop();
+
+    if (this->num_extruders > 0) {
+        const std::vector<Extruder> &extruders = writer.extruders();
+        assert(! extruders.empty() && num_extruders == extruders.back().id() + 1);
+        this->e_retracted.assign(num_extruders, 0);
+        this->e_restart_extra.assign(num_extruders, 0);
+        for (const Extruder &e : extruders) {
+            this->e_retracted[e.id()]     = e.retracted();
+            this->e_restart_extra[e.id()] = e.restart_extra();
+        }
+        opt_e_retracted->values = this->e_retracted;
+        opt_e_restart_extra->values = this->e_restart_extra;
+        if (! writer.config.use_relative_e_distances) {
+            this->e_position.assign(num_extruders, 0);
+            for (const Extruder &e : extruders)
+                this->e_position[e.id()] = e.position();
+            this->opt_e_position->values = this->e_position;
+        }
+    }
+}
+
+// Throw if any of the output vector variables were resized by the script.
+void GCode::PlaceholderParserIntegration::validate_output_vector_variables()
+{
+    if (this->opt_position->values.size() != 3)
+        throw Slic3r::RuntimeError("\"position\" output variable must not be resized by the script.");
+    if (this->num_extruders > 0) {
+        if (this->opt_e_position && this->opt_e_position->values.size() != this->num_extruders)
+            throw Slic3r::RuntimeError("\"e_position\" output variable must not be resized by the script.");
+        if (this->opt_e_retracted->values.size() != this->num_extruders)
+            throw Slic3r::RuntimeError("\"e_retracted\" output variable must not be resized by the script.");
+        if (this->opt_e_restart_extra->values.size() != this->num_extruders)
+            throw Slic3r::RuntimeError("\"e_restart_extra\" output variable must not be resized by the script.");
+    }
+}
+
 // Collect pairs of object_layer + support_layer sorted by print_z.
 // object_layer & support_layer are considered to be on the same print_z, if they are not further than EPSILON.
 GCode::ObjectsLayerToPrint GCode::collect_layers_to_print(const PrintObject& object)
@@ -487,8 +567,8 @@ GCode::ObjectsLayerToPrint GCode::collect_layers_to_print(const PrintObject& obj
         // first layer may result in skirt/brim in the air and maybe other issues.
         if (layers_to_print.size() == 1u) {
             if (!has_extrusions)
-                throw Slic3r::SlicingError(_(L("There is an object with no extrusions in the first layer.")) + "\n" +
+                throw Slic3r::SlicingError(_u8L("There is an object with no extrusions in the first layer.") + "\n" +
-                                           _(L("Object name")) + ": " + object.model_object()->name);
+                                           _u8L("Object name") + ": " + object.model_object()->name);
         }
 
         // In case there are extrusions on this layer, check there is a layer to lay it on.
@@ -518,14 +598,14 @@ GCode::ObjectsLayerToPrint GCode::collect_layers_to_print(const PrintObject& obj
         std::string warning;
         size_t i = 0;
         for (i = 0; i < std::min(warning_ranges.size(), size_t(3)); ++i)
-            warning += Slic3r::format(_(L("Empty layer between %1% and %2%.")),
+            warning += Slic3r::format(_u8L("Empty layer between %1% and %2%."),
                                       warning_ranges[i].first, warning_ranges[i].second) + "\n";
         if (i < warning_ranges.size())
-            warning += _(L("(Some lines not shown)")) + "\n";
+            warning += _u8L("(Some lines not shown)") + "\n";
         warning += "\n";
-        warning += Slic3r::format(_(L("Object name: %1%")), object.model_object()->name) + "\n\n"
+        warning += Slic3r::format(_u8L("Object name: %1%"), object.model_object()->name) + "\n\n"
-            + _(L("Make sure the object is printable. This is usually caused by negligibly small extrusions or by a faulty model. "
+            + _u8L("Make sure the object is printable. This is usually caused by negligibly small extrusions or by a faulty model. "
-                "Try to repair the model or change its orientation on the bed."));
+                "Try to repair the model or change its orientation on the bed.");
 
         const_cast<Print*>(object.print())->active_step_add_warning(
             PrintStateBase::WarningLevel::CRITICAL, warning);
@@ -655,25 +735,25 @@ namespace DoExport {
         };
 
         const GCodeConfig& config = print.config();
-        check(_(L("Start G-code")), config.start_gcode.value);
+        check(_u8L("Start G-code"), config.start_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("End G-code")), config.end_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("End G-code"), config.end_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Before layer change G-code")), config.before_layer_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Before layer change G-code"), config.before_layer_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("After layer change G-code")), config.layer_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("After layer change G-code"), config.layer_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Tool change G-code")), config.toolchange_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Tool change G-code"), config.toolchange_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Between objects G-code (for sequential printing)")), config.between_objects_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Between objects G-code (for sequential printing)"), config.between_objects_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Color Change G-code")), config.color_change_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Color Change G-code"), config.color_change_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Pause Print G-code")), config.pause_print_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Pause Print G-code"), config.pause_print_gcode.value);
-        if (ret.size() < MAX_TAGS_COUNT) check(_(L("Template Custom G-code")), config.template_custom_gcode.value);
+        if (ret.size() < MAX_TAGS_COUNT) check(_u8L("Template Custom G-code"), config.template_custom_gcode.value);
         if (ret.size() < MAX_TAGS_COUNT) {
             for (const std::string& value : config.start_filament_gcode.values) {
-                check(_(L("Filament Start G-code")), value);
+                check(_u8L("Filament Start G-code"), value);
                 if (ret.size() == MAX_TAGS_COUNT)
                     break;
             }
         }
         if (ret.size() < MAX_TAGS_COUNT) {
             for (const std::string& value : config.end_filament_gcode.values) {
-                check(_(L("Filament End G-code")), value);
+                check(_u8L("Filament End G-code"), value);
                 if (ret.size() == MAX_TAGS_COUNT)
                     break;
             }
@@ -681,7 +761,7 @@ namespace DoExport {
         if (ret.size() < MAX_TAGS_COUNT) {
             const CustomGCode::Info& custom_gcode_per_print_z = print.model().custom_gcode_per_print_z;
             for (const auto& gcode : custom_gcode_per_print_z.gcodes) {
-                check(_(L("Custom G-code")), gcode.extra);
+                check(_u8L("Custom G-code"), gcode.extra);
                 if (ret.size() == MAX_TAGS_COUNT)
                     break;
             }
@@ -714,9 +794,9 @@ void GCode::do_export(Print* print, const char* path, GCodeProcessorResult* resu
             reports += source + ": \"" + keyword + "\"\n";
         }
         print->active_step_add_warning(PrintStateBase::WarningLevel::NON_CRITICAL,
-            _(L("In the custom G-code were found reserved keywords:")) + "\n" +
+            _u8L("In the custom G-code were found reserved keywords:") + "\n" +
             reports +
-            _(L("This may cause problems in g-code visualization and printing time estimation.")));
+            _u8L("This may cause problems in g-code visualization and printing time estimation."));
     }
 
     BOOST_LOG_TRIVIAL(info) << "Exporting G-code..." << log_memory_info();
@@ -733,7 +813,6 @@ void GCode::do_export(Print* print, const char* path, GCodeProcessorResult* resu
         throw Slic3r::RuntimeError(std::string("G-code export to ") + path + " failed.\nCannot open the file for writing.\n");
 
     try {
-        m_placeholder_parser_failed_templates.clear();
         this->_do_export(*print, file, thumbnail_cb);
         file.flush();
         if (file.is_error()) {
@@ -750,11 +829,11 @@ void GCode::do_export(Print* print, const char* path, GCodeProcessorResult* resu
     }
     file.close();
 
-    if (! m_placeholder_parser_failed_templates.empty()) {
+    if (! m_placeholder_parser_integration.failed_templates.empty()) {
         // G-code export proceeded, but some of the PlaceholderParser substitutions failed.
         //FIXME localize!
         std::string msg = std::string("G-code export to ") + path + " failed due to invalid custom G-code sections:\n\n";
-        for (const auto &name_and_error : m_placeholder_parser_failed_templates)
+        for (const auto &name_and_error : m_placeholder_parser_integration.failed_templates)
             msg += name_and_error.first + "\n" + name_and_error.second + "\n";
         msg += "\nPlease inspect the file ";
         msg += path_tmp + " for error messages enclosed between\n";
@@ -1083,10 +1162,12 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     file.find_replace_enable();
 
     // Prepare the helper object for replacing placeholders in custom G-code and output filename.
-    m_placeholder_parser = print.placeholder_parser();
+    m_placeholder_parser_integration.parser = print.placeholder_parser();
-    m_placeholder_parser.update_timestamp();
+    m_placeholder_parser_integration.parser.update_timestamp();
-    m_placeholder_parser_context.rng = std::mt19937(std::chrono::high_resolution_clock::now().time_since_epoch().count());
+    m_placeholder_parser_integration.context.rng = std::mt19937(std::chrono::high_resolution_clock::now().time_since_epoch().count());
-    print.update_object_placeholders(m_placeholder_parser.config_writable(), ".gcode");
+    // Enable passing global variables between PlaceholderParser invocations.
+    m_placeholder_parser_integration.context.global_config = std::make_unique<DynamicConfig>();
+    print.update_object_placeholders(m_placeholder_parser_integration.parser.config_writable(), ".gcode");
 
     // Get optimal tool ordering to minimize tool switches of a multi-exruder print.
     // For a print by objects, find the 1st printing object.
@@ -1109,7 +1190,7 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
         }
         if (initial_extruder_id == static_cast<unsigned int>(-1))
             // No object to print was found, cancel the G-code export.
-            throw Slic3r::SlicingError(_(L("No extrusions were generated for objects.")));
+            throw Slic3r::SlicingError(_u8L("No extrusions were generated for objects."));
         // We don't allow switching of extruders per layer by Model::custom_gcode_per_print_z in sequential mode.
         // Use the extruder IDs collected from Regions.
         this->set_extruders(print.extruders());
@@ -1120,7 +1201,7 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
         tool_ordering.assign_custom_gcodes(print);
         if (tool_ordering.all_extruders().empty())
             // No object to print was found, cancel the G-code export.
-            throw Slic3r::SlicingError(_(L("No extrusions were generated for objects.")));
+            throw Slic3r::SlicingError(_u8L("No extrusions were generated for objects."));
         has_wipe_tower = print.has_wipe_tower() && tool_ordering.has_wipe_tower();
         initial_extruder_id = (has_wipe_tower && ! print.config().single_extruder_multi_material_priming) ?
             // The priming towers will be skipped.
@@ -1150,27 +1231,25 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     // Emit machine envelope limits for the Marlin firmware.
     this->print_machine_envelope(file, print);
 
-    // Disable fan.
+    // Update output variables after the extruders were initialized.
-    if (! print.config().cooling.get_at(initial_extruder_id) || print.config().disable_fan_first_layers.get_at(initial_extruder_id))
+    m_placeholder_parser_integration.init(m_writer);
-        file.write(m_writer.set_fan(0));
-
     // Let the start-up script prime the 1st printing tool.
-    m_placeholder_parser.set("initial_tool", initial_extruder_id);
+    this->placeholder_parser().set("initial_tool", initial_extruder_id);
-    m_placeholder_parser.set("initial_extruder", initial_extruder_id);
+    this->placeholder_parser().set("initial_extruder", initial_extruder_id);
-    m_placeholder_parser.set("current_extruder", initial_extruder_id);
+    this->placeholder_parser().set("current_extruder", initial_extruder_id);
     //Set variable for total layer count so it can be used in custom gcode.
-    m_placeholder_parser.set("total_layer_count", m_layer_count);
+    this->placeholder_parser().set("total_layer_count", m_layer_count);
     // Useful for sequential prints.
-    m_placeholder_parser.set("current_object_idx", 0);
+    this->placeholder_parser().set("current_object_idx", 0);
     // For the start / end G-code to do the priming and final filament pull in case there is no wipe tower provided.
-    m_placeholder_parser.set("has_wipe_tower", has_wipe_tower);
+    this->placeholder_parser().set("has_wipe_tower", has_wipe_tower);
-    m_placeholder_parser.set("has_single_extruder_multi_material_priming", has_wipe_tower && print.config().single_extruder_multi_material_priming);
+    this->placeholder_parser().set("has_single_extruder_multi_material_priming", has_wipe_tower && print.config().single_extruder_multi_material_priming);
-    m_placeholder_parser.set("total_toolchanges", std::max(0, print.wipe_tower_data().number_of_toolchanges)); // Check for negative toolchanges (single extruder mode) and set to 0 (no tool change).
+    this->placeholder_parser().set("total_toolchanges", std::max(0, print.wipe_tower_data().number_of_toolchanges)); // Check for negative toolchanges (single extruder mode) and set to 0 (no tool change).
     {
         BoundingBoxf bbox(print.config().bed_shape.values);
-        m_placeholder_parser.set("print_bed_min",  new ConfigOptionFloats({ bbox.min.x(), bbox.min.y() }));
+        this->placeholder_parser().set("print_bed_min",  new ConfigOptionFloats({ bbox.min.x(), bbox.min.y() }));
-        m_placeholder_parser.set("print_bed_max",  new ConfigOptionFloats({ bbox.max.x(), bbox.max.y() }));
+        this->placeholder_parser().set("print_bed_max",  new ConfigOptionFloats({ bbox.max.x(), bbox.max.y() }));
-        m_placeholder_parser.set("print_bed_size", new ConfigOptionFloats({ bbox.size().x(), bbox.size().y() }));
+        this->placeholder_parser().set("print_bed_size", new ConfigOptionFloats({ bbox.size().x(), bbox.size().y() }));
     }
     {
         // Convex hull of the 1st layer extrusions, for bed leveling and placing the initial purge line.
@@ -1183,15 +1262,15 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
         for (const Point &pt : print.first_layer_convex_hull().points)
             pts->values.emplace_back(unscale(pt));
         BoundingBoxf bbox(pts->values);
-        m_placeholder_parser.set("first_layer_print_convex_hull", pts.release());
+        this->placeholder_parser().set("first_layer_print_convex_hull", pts.release());
-        m_placeholder_parser.set("first_layer_print_min",  new ConfigOptionFloats({ bbox.min.x(), bbox.min.y() }));
+        this->placeholder_parser().set("first_layer_print_min",  new ConfigOptionFloats({ bbox.min.x(), bbox.min.y() }));
-        m_placeholder_parser.set("first_layer_print_max",  new ConfigOptionFloats({ bbox.max.x(), bbox.max.y() }));
+        this->placeholder_parser().set("first_layer_print_max",  new ConfigOptionFloats({ bbox.max.x(), bbox.max.y() }));
-        m_placeholder_parser.set("first_layer_print_size", new ConfigOptionFloats({ bbox.size().x(), bbox.size().y() }));
+        this->placeholder_parser().set("first_layer_print_size", new ConfigOptionFloats({ bbox.size().x(), bbox.size().y() }));
 
         std::vector<unsigned char> is_extruder_used(print.config().nozzle_diameter.size(), 0);
         for (unsigned int extruder_id : tool_ordering.all_extruders())
             is_extruder_used[extruder_id] = true;
-        m_placeholder_parser.set("is_extruder_used", new ConfigOptionBools(is_extruder_used));
+        this->placeholder_parser().set("is_extruder_used", new ConfigOptionBools(is_extruder_used));
     }
 
     // Enable ooze prevention if configured so.
@@ -1258,7 +1337,7 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
                 // Ff we are printing the bottom layer of an object, and we have already finished
                 // another one, set first layer temperatures. This happens before the Z move
                 // is triggered, so machine has more time to reach such temperatures.
-                m_placeholder_parser.set("current_object_idx", int(finished_objects));
+                this->placeholder_parser().set("current_object_idx", int(finished_objects));
                 std::string between_objects_gcode = this->placeholder_parser_process("between_objects_gcode", print.config().between_objects_gcode.value, initial_extruder_id);
                 // Set first layer bed and extruder temperatures, don't wait for it to reach the temperature.
                 this->_print_first_layer_bed_temperature(file, print, between_objects_gcode, initial_extruder_id, false);
@@ -1314,8 +1393,8 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
                     // (See https://github.com/prusa3d/PrusaSlicer/issues/5441.)
                     if (overlap) {
                         print.active_step_add_warning(PrintStateBase::WarningLevel::CRITICAL,
-                            _(L("Your print is very close to the priming regions. "
+                            _u8L("Your print is very close to the priming regions. "
-                              "Make sure there is no collision.")));
+                              "Make sure there is no collision."));
                     } else {
                         // Just continue printing, no action necessary.
                     }
@@ -1344,7 +1423,7 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     {
         DynamicConfig config;
         config.set_key_value("layer_num", new ConfigOptionInt(m_layer_index));
-        config.set_key_value("layer_z",   new ConfigOptionFloat(m_writer.get_position()(2) - m_config.z_offset.value));
+        config.set_key_value("layer_z",   new ConfigOptionFloat(m_writer.get_position().z() - m_config.z_offset.value));
         config.set_key_value("max_layer_z", new ConfigOptionFloat(m_max_layer_z));
         if (print.config().single_extruder_multi_material) {
             // Process the end_filament_gcode for the active filament only.
@@ -1567,17 +1646,46 @@ void GCode::process_layers(
     output_stream.find_replace_enable();
 }
 
-std::string GCode::placeholder_parser_process(const std::string &name, const std::string &templ, unsigned int current_extruder_id, const DynamicConfig *config_override)
+std::string GCode::placeholder_parser_process(
+    const std::string   &name,
+    const std::string   &templ,
+    unsigned int         current_extruder_id,
+    const DynamicConfig *config_override)
 {
+    PlaceholderParserIntegration &ppi = m_placeholder_parser_integration;
     try {
-        return m_placeholder_parser.process(templ, current_extruder_id, config_override, &m_placeholder_parser_context);
+        ppi.update_from_gcodewriter(m_writer);
-    } catch (std::runtime_error &err) {
+        std::string output = ppi.parser.process(templ, current_extruder_id, config_override, &ppi.output_config, &ppi.context);
+        ppi.validate_output_vector_variables();
+
+        if (const std::vector<double> &pos = ppi.opt_position->values; ppi.position != pos) {
+            // Update G-code writer.
+            m_writer.update_position({ pos[0], pos[1], pos[2] });
+            this->set_last_pos(this->gcode_to_point({ pos[0], pos[1] }));
+        }
+
+        for (const Extruder &e : m_writer.extruders()) {
+            unsigned int eid = e.id();
+            assert(eid < ppi.num_extruders);
+            if ( eid < ppi.num_extruders) {
+                if (! m_writer.config.use_relative_e_distances && ! is_approx(ppi.e_position[eid], ppi.opt_e_position->values[eid]))
+                    const_cast<Extruder&>(e).set_position(ppi.opt_e_position->values[eid]);
+                if (! is_approx(ppi.e_retracted[eid], ppi.opt_e_retracted->values[eid]) || 
+                    ! is_approx(ppi.e_restart_extra[eid], ppi.opt_e_restart_extra->values[eid]))
+                    const_cast<Extruder&>(e).set_retracted(ppi.opt_e_retracted->values[eid], ppi.opt_e_restart_extra->values[eid]);
+            }
+        }
+
+        return output;
+    } 
+    catch (std::runtime_error &err) 
+    {
         // Collect the names of failed template substitutions for error reporting.
-        auto it = m_placeholder_parser_failed_templates.find(name);
+        auto it = ppi.failed_templates.find(name);
-        if (it == m_placeholder_parser_failed_templates.end())
+        if (it == ppi.failed_templates.end())
             // Only if there was no error reported for this template, store the first error message into the map to be reported.
             // We don't want to collect error message for each and every occurence of a single custom G-code section.
-            m_placeholder_parser_failed_templates.insert(it, std::make_pair(name, std::string(err.what())));
+            ppi.failed_templates.insert(it, std::make_pair(name, std::string(err.what())));
         // Insert the macro error message into the G-code.
         return
             std::string("\n!!!!! Failed to process the custom G-code template ") + name + "\n" +
@@ -1670,23 +1778,25 @@ void GCode::print_machine_envelope(GCodeOutputStream &file, Print &print)
             int(print.config().machine_max_feedrate_e.values.front() * factor + 0.5),
             factor == 60 ? "mm / min" : "mm / sec");
 
-        // Now M204 - acceleration. This one is quite hairy thanks to how Marlin guys care about
+        // Now M204 - acceleration. This one is quite hairy...
-        // backwards compatibility: https://github.com/prusa3d/PrusaSlicer/issues/1089
-        // Legacy Marlin should export travel acceleration the same as printing acceleration.
-        // MarlinFirmware has the two separated.
-        int travel_acc = flavor == gcfMarlinLegacy
-                       ? int(print.config().machine_max_acceleration_extruding.values.front() + 0.5)
-                       : int(print.config().machine_max_acceleration_travel.values.front() + 0.5);
-        // Retract acceleration not accepted in M204 in RRF
         if (flavor == gcfRepRapFirmware)
+            // Uses M204 P[print] T[travel]
             file.write_format("M204 P%d T%d ; sets acceleration (P, T), mm/sec^2\n",
                 int(print.config().machine_max_acceleration_extruding.values.front() + 0.5),
-                travel_acc);
+                int(print.config().machine_max_acceleration_travel.values.front() + 0.5));
-        else
+        else if (flavor == gcfMarlinLegacy)
+            // Legacy Marlin uses M204 S[print] T[retract]
+            file.write_format("M204 S%d T%d ; sets acceleration (S) and retract acceleration (R), mm/sec^2\n",
+                int(print.config().machine_max_acceleration_extruding.values.front() + 0.5),
+                int(print.config().machine_max_acceleration_retracting.values.front() + 0.5));
+        else if (flavor == gcfMarlinFirmware)
+            // New Marlin uses M204 P[print] R[retract] T[travel]
             file.write_format("M204 P%d R%d T%d ; sets acceleration (P, T) and retract acceleration (R), mm/sec^2\n",
                 int(print.config().machine_max_acceleration_extruding.values.front() + 0.5),
                 int(print.config().machine_max_acceleration_retracting.values.front() + 0.5),
-                travel_acc);
+                int(print.config().machine_max_acceleration_travel.values.front() + 0.5));
+        else
+            assert(false);
 
         assert(is_decimal_separator_point());
         file.write_format(flavor == gcfRepRapFirmware
@@ -1713,17 +1823,18 @@ void GCode::print_machine_envelope(GCodeOutputStream &file, Print &print)
 // M190 - Set Extruder Temperature and Wait
 void GCode::_print_first_layer_bed_temperature(GCodeOutputStream &file, Print &print, const std::string &gcode, unsigned int first_printing_extruder_id, bool wait)
 {
+    bool autoemit = print.config().autoemit_temperature_commands;
     // Initial bed temperature based on the first extruder.
     int  temp = print.config().first_layer_bed_temperature.get_at(first_printing_extruder_id);
     // Is the bed temperature set by the provided custom G-code?
     int  temp_by_gcode     = -1;
     bool temp_set_by_gcode = custom_gcode_sets_temperature(gcode, 140, 190, false, temp_by_gcode);
-    if (temp_set_by_gcode && temp_by_gcode >= 0 && temp_by_gcode < 1000)
+    if (autoemit && temp_set_by_gcode && temp_by_gcode >= 0 && temp_by_gcode < 1000)
         temp = temp_by_gcode;
     // Always call m_writer.set_bed_temperature() so it will set the internal "current" state of the bed temp as if
     // the custom start G-code emited these.
     std::string set_temp_gcode = m_writer.set_bed_temperature(temp, wait);
-    if (! temp_set_by_gcode)
+    if (autoemit && ! temp_set_by_gcode)
         file.write(set_temp_gcode);
 }
 
@@ -1734,13 +1845,14 @@ void GCode::_print_first_layer_bed_temperature(GCodeOutputStream &file, Print &p
 // RepRapFirmware: G10 Sxx
 void GCode::_print_first_layer_extruder_temperatures(GCodeOutputStream &file, Print &print, const std::string &gcode, unsigned int first_printing_extruder_id, bool wait)
 {
+    bool autoemit = print.config().autoemit_temperature_commands;
     // Is the bed temperature set by the provided custom G-code?
     int  temp_by_gcode = -1;
     bool include_g10   = print.config().gcode_flavor == gcfRepRapFirmware;
-    if (custom_gcode_sets_temperature(gcode, 104, 109, include_g10, temp_by_gcode)) {
+    if (! autoemit  || custom_gcode_sets_temperature(gcode, 104, 109, include_g10, temp_by_gcode)) {
         // Set the extruder temperature at m_writer, but throw away the generated G-code as it will be written with the custom G-code.
         int temp = print.config().first_layer_temperature.get_at(first_printing_extruder_id);
-        if (temp_by_gcode >= 0 && temp_by_gcode < 1000)
+        if (autoemit && temp_by_gcode >= 0 && temp_by_gcode < 1000)
             temp = temp_by_gcode;
         m_writer.set_temperature(temp, wait, first_printing_extruder_id);
     } else {
@@ -2550,7 +2662,7 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, const std::string_view descr
     }
 
     // reset acceleration
-    gcode += m_writer.set_acceleration((unsigned int)(m_config.default_acceleration.value + 0.5));
+    gcode += m_writer.set_print_acceleration((unsigned int)(m_config.default_acceleration.value + 0.5));
 
     if (m_wipe.enable) {
         m_wipe.path = paths.front().polyline;
@@ -2636,7 +2748,7 @@ std::string GCode::extrude_multi_path(ExtrusionMultiPath multipath, const std::s
         }
     }
     // reset acceleration
-    gcode += m_writer.set_acceleration((unsigned int)floor(m_config.default_acceleration.value + 0.5));
+    gcode += m_writer.set_print_acceleration((unsigned int)floor(m_config.default_acceleration.value + 0.5));
     return gcode;
 }
 
@@ -2662,7 +2774,7 @@ std::string GCode::extrude_path(ExtrusionPath path, std::string_view description
         m_wipe.path.reverse();
     }
     // reset acceleration
-    gcode += m_writer.set_acceleration((unsigned int)floor(m_config.default_acceleration.value + 0.5));
+    gcode += m_writer.set_print_acceleration((unsigned int)floor(m_config.default_acceleration.value + 0.5));
     return gcode;
 }
 
@@ -2805,7 +2917,7 @@ std::string GCode::_extrude(const ExtrusionPath &path, const std::string_view de
         } else {
             acceleration = m_config.default_acceleration.value;
         }
-        gcode += m_writer.set_acceleration((unsigned int)floor(acceleration + 0.5));
+        gcode += m_writer.set_print_acceleration((unsigned int)floor(acceleration + 0.5));
     }
 
     // calculate extrusion length per distance unit
@@ -3074,8 +3186,18 @@ std::string GCode::travel_to(const Point &point, ExtrusionRole role, std::string
 
     // use G1 because we rely on paths being straight (G0 may make round paths)
     if (travel.size() >= 2) {
+
+        gcode += m_writer.set_travel_acceleration((unsigned int)(m_config.travel_acceleration.value + 0.5));
+
         for (size_t i = 1; i < travel.size(); ++ i)
             gcode += m_writer.travel_to_xy(this->point_to_gcode(travel.points[i]), comment);
+
+        if (! GCodeWriter::supports_separate_travel_acceleration(config().gcode_flavor)) {
+            // In case that this flavor does not support separate print and travel acceleration,
+            // reset acceleration to default.
+            gcode += m_writer.set_travel_acceleration((unsigned int)(m_config.travel_acceleration.value + 0.5));
+        }
+
         this->set_last_pos(travel.points.back());
     }
     return gcode;
@@ -3153,7 +3275,7 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
 
     // if we are running a single-extruder setup, just set the extruder and return nothing
     if (!m_writer.multiple_extruders) {
-        m_placeholder_parser.set("current_extruder", extruder_id);
+        this->placeholder_parser().set("current_extruder", extruder_id);
 
         std::string gcode;
         // Append the filament start G-code.
@@ -3162,7 +3284,7 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
             // Process the start_filament_gcode for the filament.
             DynamicConfig config;
             config.set_key_value("layer_num", new ConfigOptionInt(m_layer_index));
-            config.set_key_value("layer_z",   new ConfigOptionFloat(this->writer().get_position()(2) - m_config.z_offset.value));
+            config.set_key_value("layer_z",   new ConfigOptionFloat(this->writer().get_position().z() - m_config.z_offset.value));
             config.set_key_value("max_layer_z", new ConfigOptionFloat(m_max_layer_z));
             config.set_key_value("filament_extruder_id", new ConfigOptionInt(int(extruder_id)));
             gcode += this->placeholder_parser_process("start_filament_gcode", start_filament_gcode, extruder_id, &config);
@@ -3226,7 +3348,7 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
         gcode += m_writer.set_temperature(temp, false);
     }
 
-    m_placeholder_parser.set("current_extruder", extruder_id);
+    this->placeholder_parser().set("current_extruder", extruder_id);
 
     // Append the filament start G-code.
     const std::string &start_filament_gcode = m_config.start_filament_gcode.get_at(extruder_id);
@@ -3234,7 +3356,7 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
         // Process the start_filament_gcode for the new filament.
         DynamicConfig config;
         config.set_key_value("layer_num", new ConfigOptionInt(m_layer_index));
-        config.set_key_value("layer_z",   new ConfigOptionFloat(this->writer().get_position()(2) - m_config.z_offset.value));
+        config.set_key_value("layer_z",   new ConfigOptionFloat(this->writer().get_position().z() - m_config.z_offset.value));
         config.set_key_value("max_layer_z", new ConfigOptionFloat(m_max_layer_z));
         config.set_key_value("filament_extruder_id", new ConfigOptionInt(int(extruder_id)));
         gcode += this->placeholder_parser_process("start_filament_gcode", start_filament_gcode, extruder_id, &config);
@@ -3263,10 +3385,12 @@ Vec2d GCode::point_to_gcode_quantized(const Point &point) const
 // convert a model-space scaled point into G-code coordinates
 Point GCode::gcode_to_point(const Vec2d &point) const
 {
-    Vec2d extruder_offset = EXTRUDER_CONFIG(extruder_offset);
+    Vec2d pt = point - m_origin;
-    return Point(
+    if (const Extruder *extruder = m_writer.extruder(); extruder)
-        scale_(point(0) - m_origin(0) + extruder_offset(0)),
+        // This function may be called at the very start from toolchange G-code when the extruder is not assigned yet.
-        scale_(point(1) - m_origin(1) + extruder_offset(1)));
+        pt += m_config.extruder_offset.get_at(extruder->id());
+    return scaled<coord_t>(pt);
+        
 }
 
 }   // namespace Slic3r

src/libslic3r/GCode.hpp

@@ -173,8 +173,8 @@ public:
     const Layer*    layer() const { return m_layer; }
     GCodeWriter&    writer() { return m_writer; }
     const GCodeWriter& writer() const { return m_writer; }
-    PlaceholderParser& placeholder_parser() { return m_placeholder_parser; }
+    PlaceholderParser& placeholder_parser() { return m_placeholder_parser_integration.parser; }
-    const PlaceholderParser& placeholder_parser() const { return m_placeholder_parser; }
+    const PlaceholderParser& placeholder_parser() const { return m_placeholder_parser_integration.parser; }
     // Process a template through the placeholder parser, collect error messages to be reported
     // inside the generated string and after the G-code export finishes.
     std::string     placeholder_parser_process(const std::string &name, const std::string &templ, unsigned int current_extruder_id, const DynamicConfig *config_override = nullptr);
@@ -343,11 +343,33 @@ private:
     // scaled G-code resolution
     double                              m_scaled_resolution;
     GCodeWriter                         m_writer;
-    PlaceholderParser                   m_placeholder_parser;
+
+    struct PlaceholderParserIntegration {
+        void reset();
+        void init(const GCodeWriter &config);
+        void update_from_gcodewriter(const GCodeWriter &writer);
+        void validate_output_vector_variables();
+
+        PlaceholderParser                   parser;
         // For random number generator etc.
-    PlaceholderParser::ContextData      m_placeholder_parser_context;
+        PlaceholderParser::ContextData      context;
         // Collection of templates, on which the placeholder substitution failed.
-    std::map<std::string, std::string>  m_placeholder_parser_failed_templates;
+        std::map<std::string, std::string>  failed_templates;
+        // Input/output from/to custom G-code block, for returning position, retraction etc.
+        DynamicConfig                       output_config;
+        ConfigOptionFloats                 *opt_position { nullptr };
+        ConfigOptionFloat                  *opt_zhop { nullptr };
+        ConfigOptionFloats                 *opt_e_position { nullptr };
+        ConfigOptionFloats                 *opt_e_retracted { nullptr };
+        ConfigOptionFloats                 *opt_e_restart_extra { nullptr };
+        // Caches of the data passed to the script.
+        size_t                              num_extruders;
+        std::vector<double>                 position;
+        std::vector<double>                 e_position;
+        std::vector<double>                 e_retracted;
+        std::vector<double>                 e_restart_extra;
+    } m_placeholder_parser_integration;
+
     OozePrevention                      m_ooze_prevention;
     Wipe                                m_wipe;
     AvoidCrossingPerimeters             m_avoid_crossing_perimeters;

src/libslic3r/GCode/CoolingBuffer.cpp

@@ -789,10 +789,11 @@ std::string CoolingBuffer::apply_layer_cooldown(
             }
 #undef EXTRUDER_CONFIG
             bridge_fan_control = bridge_fan_speed > fan_speed_new;
-        } else {
+        } else { // fan disabled
             bridge_fan_control = false;
             bridge_fan_speed   = 0;
             fan_speed_new      = 0;
+            custom_fan_speed_limits.second = 0;
         }
         if (fan_speed_new != m_fan_speed) {
             m_fan_speed = fan_speed_new;

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -3,6 +3,7 @@
 #include "libslic3r/Print.hpp"
 #include "libslic3r/LocalesUtils.hpp"
 #include "libslic3r/format.hpp"
+#include "libslic3r/GCodeWriter.hpp"
 #include "GCodeProcessor.hpp"
 
 #include <boost/algorithm/string/case_conv.hpp>
@@ -568,10 +569,11 @@ void GCodeProcessor::apply_config(const PrintConfig& config)
         m_result.filament_cost[i]       = static_cast<float>(config.filament_cost.get_at(i));
     }
 
-    if ((m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware || m_flavor == gcfRepRapFirmware) && config.machine_limits_usage.value != MachineLimitsUsage::Ignore) {
+    if ((m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware || m_flavor == gcfRepRapFirmware || m_flavor == gcfKlipper)
+         && config.machine_limits_usage.value != MachineLimitsUsage::Ignore) {
         m_time_processor.machine_limits = reinterpret_cast<const MachineEnvelopeConfig&>(config);
-        if (m_flavor == gcfMarlinLegacy) {
+        if (m_flavor == gcfMarlinLegacy || m_flavor == gcfKlipper) {
-            // Legacy Marlin does not have separate travel acceleration, it uses the 'extruding' value instead.
+            // Legacy Marlin and Klipper don't have separate travel acceleration, they use the 'extruding' value instead.
             m_time_processor.machine_limits.machine_max_acceleration_travel = m_time_processor.machine_limits.machine_max_acceleration_extruding;
         }
         if (m_flavor == gcfRepRapFirmware) {
@@ -609,7 +611,12 @@ for (size_t i = 0; i < static_cast<size_t>(PrintEstimatedStatistics::ETimeMode::
         float max_retract_acceleration = get_option_value(m_time_processor.machine_limits.machine_max_acceleration_retracting, i);
         m_time_processor.machines[i].max_retract_acceleration = max_retract_acceleration;
         m_time_processor.machines[i].retract_acceleration = (max_retract_acceleration > 0.0f) ? max_retract_acceleration : DEFAULT_RETRACT_ACCELERATION;
+
         float max_travel_acceleration = get_option_value(m_time_processor.machine_limits.machine_max_acceleration_travel, i);
+        if ( ! GCodeWriter::supports_separate_travel_acceleration(config.gcode_flavor.value) || config.machine_limits_usage.value != MachineLimitsUsage::EmitToGCode) {
+            // Only clamp travel acceleration when it is accessible in machine limits.
+            max_travel_acceleration = 0;
+        }
         m_time_processor.machines[i].max_travel_acceleration = max_travel_acceleration;
         m_time_processor.machines[i].travel_acceleration = (max_travel_acceleration > 0.0f) ? max_travel_acceleration : DEFAULT_TRAVEL_ACCELERATION;
     }
@@ -788,7 +795,7 @@ void GCodeProcessor::apply_config(const DynamicPrintConfig& config)
     if (machine_limits_usage != nullptr)
         use_machine_limits = machine_limits_usage->value != MachineLimitsUsage::Ignore;
 
-    if (use_machine_limits && (m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware || m_flavor == gcfRepRapFirmware)) {
+    if (use_machine_limits && (m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware || m_flavor == gcfRepRapFirmware || m_flavor == gcfKlipper)) {
         const ConfigOptionFloats* machine_max_acceleration_x = config.option<ConfigOptionFloats>("machine_max_acceleration_x");
         if (machine_max_acceleration_x != nullptr)
             m_time_processor.machine_limits.machine_max_acceleration_x.values = machine_max_acceleration_x->values;
@@ -846,8 +853,8 @@ void GCodeProcessor::apply_config(const DynamicPrintConfig& config)
             m_time_processor.machine_limits.machine_max_acceleration_retracting.values = machine_max_acceleration_retracting->values;
 
 
-        // Legacy Marlin does not have separate travel acceleration, it uses the 'extruding' value instead.
+        // Legacy Marlin and Klipper don't have separate travel acceleration, they use the 'extruding' value instead.
-        const ConfigOptionFloats* machine_max_acceleration_travel = config.option<ConfigOptionFloats>(m_flavor == gcfMarlinLegacy
+        const ConfigOptionFloats* machine_max_acceleration_travel = config.option<ConfigOptionFloats>((m_flavor == gcfMarlinLegacy || m_flavor == gcfKlipper)
                                                                                                     ? "machine_max_acceleration_extruding"
                                                                                                     : "machine_max_acceleration_travel");
         if (machine_max_acceleration_travel != nullptr)
@@ -885,7 +892,7 @@ void GCodeProcessor::apply_config(const DynamicPrintConfig& config)
         m_time_processor.machines[i].travel_acceleration = (max_travel_acceleration > 0.0f) ? max_travel_acceleration : DEFAULT_TRAVEL_ACCELERATION;
     }
 
-    if (m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware) {
+    if (m_flavor == gcfMarlinLegacy || m_flavor == gcfMarlinFirmware) { // No Klipper here, it does not support silent mode.
         const ConfigOptionBool* silent_mode = config.option<ConfigOptionBool>("silent_mode");
         if (silent_mode != nullptr) {
             if (silent_mode->value && m_time_processor.machine_limits.machine_max_acceleration_x.values.size() > 1)
@@ -3244,7 +3251,7 @@ void GCodeProcessor::process_M205(const GCodeReader::GCodeLine& line)
 
 void GCodeProcessor::process_M220(const GCodeReader::GCodeLine& line)
 {
-    if (m_flavor != gcfMarlinLegacy && m_flavor != gcfMarlinFirmware)
+    if (m_flavor != gcfMarlinLegacy && m_flavor != gcfMarlinFirmware && m_flavor != gcfKlipper)
         return;
 
     if (line.has('B'))

src/libslic3r/GCode/PostProcessor.cpp

@@ -185,11 +185,6 @@ static int run_script(const std::string &script, const std::string &gcode, std::
 
 namespace Slic3r {
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) (s)
-#define _(s) Slic3r::I18N::translate(s)
-
 // Run post processing script / scripts if defined.
 // Returns true if a post-processing script was executed.
 // Returns false if no post-processing script was defined.
@@ -285,10 +280,10 @@ bool run_post_process_scripts(std::string &src_path, bool make_copy, const std::
                     throw Slic3r::RuntimeError(msg);
                 }
                 if (! boost::filesystem::exists(gcode_file)) {
-                    const std::string msg = (boost::format(_(L(
+                    const std::string msg = (boost::format(_u8L(
                         "Post-processing script %1% failed.\n\n"
                         "The post-processing script is expected to change the G-code file %2% in place, but the G-code file was deleted and likely saved under a new name.\n"
-                        "Please adjust the post-processing script to change the G-code in place and consult the manual on how to optionally rename the post-processed G-code file.\n")))
+                        "Please adjust the post-processing script to change the G-code in place and consult the manual on how to optionally rename the post-processed G-code file.\n"))
                         % script % path).str();
                     BOOST_LOG_TRIVIAL(error) << msg;
                     throw Slic3r::RuntimeError(msg);

src/libslic3r/GCode/WipeTower.cpp

@@ -4,12 +4,17 @@
 #include <iostream>
 #include <vector>
 #include <numeric>
+#include <memory>
 #include <sstream>
 #include <iomanip>
 
+#include "ClipperUtils.hpp"
 #include "GCodeProcessor.hpp"
 #include "BoundingBox.hpp"
 #include "LocalesUtils.hpp"
+#include "Geometry.hpp"
+#include "Surface.hpp"
+#include "Fill/FillRectilinear.hpp"
 
 #include <boost/algorithm/string/predicate.hpp>
 
@@ -88,9 +93,12 @@ public:
     }
 
     WipeTowerWriter&            disable_linear_advance() {
-        m_gcode += (m_gcode_flavor == gcfRepRapSprinter || m_gcode_flavor == gcfRepRapFirmware
+        if (m_gcode_flavor == gcfRepRapSprinter || m_gcode_flavor == gcfRepRapFirmware)
-                        ? (std::string("M572 D") + std::to_string(m_current_tool) + " S0\n")
+            m_gcode += (std::string("M572 D") + std::to_string(m_current_tool) + " S0\n");
-                        : std::string("M900 K0\n"));
+        else if (m_gcode_flavor == gcfKlipper)
+            m_gcode += "SET_PRESSURE_ADVANCE ADVANCE=0\n";
+        else
+            m_gcode += "M900 K0\n";
         return *this;
     }
 
@@ -358,6 +366,8 @@ public:
 	// Set digital trimpot motor
 	WipeTowerWriter& set_extruder_trimpot(int current)
 	{
+        if (m_gcode_flavor == gcfKlipper)
+            return *this;
         if (m_gcode_flavor == gcfRepRapSprinter || m_gcode_flavor == gcfRepRapFirmware)
             m_gcode += "M906 E";
         else
@@ -512,6 +522,8 @@ WipeTower::WipeTower(const PrintConfig& config, const std::vector<std::vector<fl
     m_wipe_tower_width(float(config.wipe_tower_width)),
     m_wipe_tower_rotation_angle(float(config.wipe_tower_rotation_angle)),
     m_wipe_tower_brim_width(float(config.wipe_tower_brim_width)),
+    m_wipe_tower_cone_angle(float(config.wipe_tower_cone_angle)),
+    m_extra_spacing(float(config.wipe_tower_extra_spacing/100.)),
     m_y_shift(0.f),
     m_z_pos(0.f),
     m_bridging(float(config.wipe_tower_bridging)),
@@ -1169,45 +1181,171 @@ WipeTower::ToolChangeResult WipeTower::finish_layer()
                       ";------------------\n\n\n\n\n\n\n");
     }
 
-    // outer perimeter (always):
+    const float spacing = m_perimeter_width - m_layer_height*float(1.-M_PI_4);
-    writer.rectangle(wt_box, feedrate);
+
+    // This block creates the stabilization cone.
+    // First define a lambda to draw the rectangle with stabilization.
+    auto supported_rectangle = [this, &writer, spacing](const box_coordinates& wt_box, double feedrate, bool infill_cone) -> Polygon {
+        const auto [R, support_scale] = get_wipe_tower_cone_base(m_wipe_tower_width, m_wipe_tower_height, m_wipe_tower_depth, m_wipe_tower_cone_angle);
+
+        double z = m_no_sparse_layers ? (m_current_height + m_layer_info->height) : m_layer_info->z; // the former should actually work in both cases, but let's stay on the safe side (the 2.6.0 is close)
+
+        double r = std::tan(Geometry::deg2rad(m_wipe_tower_cone_angle/2.f)) * (m_wipe_tower_height - z);
+        Vec2f center = (wt_box.lu + wt_box.rd) / 2.;
+        double w = wt_box.lu.y() - wt_box.ld.y();
+        enum Type {
+            Arc,
+            Corner,
+            ArcStart,
+            ArcEnd
+        };
+
+        // First generate vector of annotated point which form the boundary.
+        std::vector<std::pair<Vec2f, Type>> pts = {{wt_box.ru, Corner}};        
+        if (double alpha_start = std::asin((0.5*w)/r); ! std::isnan(alpha_start) && r > 0.5*w+0.01) {
+            for (double alpha = alpha_start; alpha < M_PI-alpha_start+0.001; alpha+=(M_PI-2*alpha_start) / 20.)
+                pts.emplace_back(Vec2f(center.x() + r*std::cos(alpha)/support_scale, center.y() + r*std::sin(alpha)), alpha == alpha_start ? ArcStart : Arc);
+            pts.back().second = ArcEnd;
+        }        
+        pts.emplace_back(wt_box.lu, Corner);
+        pts.emplace_back(wt_box.ld, Corner);
+        for (int i=int(pts.size())-3; i>0; --i)
+            pts.emplace_back(Vec2f(pts[i].first.x(), 2*center.y()-pts[i].first.y()), i == int(pts.size())-3 ? ArcStart : i == 1 ? ArcEnd : Arc);
+        pts.emplace_back(wt_box.rd, Corner);
+
+        // Create a Polygon from the points.
+        Polygon poly;
+        for (const auto& [pt, tag] : pts)
+            poly.points.push_back(Point::new_scale(pt));
+
+        // Prepare polygons to be filled by infill.
+        Polylines polylines;
+        if (infill_cone && m_wipe_tower_width > 2*spacing && m_wipe_tower_depth > 2*spacing) {
+            ExPolygons infill_areas;
+            ExPolygon wt_contour(poly);
+            Polygon wt_rectangle(Points{Point::new_scale(wt_box.ld), Point::new_scale(wt_box.rd), Point::new_scale(wt_box.ru), Point::new_scale(wt_box.lu)});
+            wt_rectangle = offset(wt_rectangle, scale_(-spacing/2.)).front();
+            wt_contour = offset_ex(wt_contour, scale_(-spacing/2.)).front();
+            infill_areas = diff_ex(wt_contour, wt_rectangle);
+            if (infill_areas.size() == 2) {
+                ExPolygon& bottom_expoly = infill_areas.front().contour.points.front().y() < infill_areas.back().contour.points.front().y() ? infill_areas[0] : infill_areas[1];
+                std::unique_ptr<Fill> filler(Fill::new_from_type(ipMonotonicLines));
+                filler->angle = Geometry::deg2rad(45.f);
+                filler->spacing = spacing;
+                FillParams params;
+                params.density = 1.f;
+                Surface surface(stBottom, bottom_expoly);
+                filler->bounding_box = get_extents(bottom_expoly);
+                polylines = filler->fill_surface(&surface, params);
+                if (! polylines.empty()) {
+                    if (polylines.front().points.front().x() > polylines.back().points.back().x()) {
+                        std::reverse(polylines.begin(), polylines.end());
+                        for (Polyline& p : polylines)
+                            p.reverse();
+                    }
+                }
+            }
+        }
+
+        // Find the closest corner and travel to it.
+        int start_i = 0;
+        double min_dist = std::numeric_limits<double>::max();
+        for (int i=0; i<int(pts.size()); ++i) {
+            if (pts[i].second == Corner) {
+                double dist = (pts[i].first - Vec2f(writer.x(), writer.y())).squaredNorm();
+                if (dist < min_dist) {
+                    min_dist = dist;
+                    start_i = i;
+                }
+            }
+        }
+        writer.travel(pts[start_i].first);
+
+        // Now actually extrude the boundary (and possibly infill):
+        int i = start_i+1 == int(pts.size()) ? 0 : start_i + 1;
+        while (i != start_i) {
+            writer.extrude(pts[i].first, feedrate);
+            if (pts[i].second == ArcEnd) {
+                // Extrude the infill.
+                if (! polylines.empty()) {
+                    // Extrude the infill and travel back to where we were.
+                    bool mirror = ((pts[i].first.y() - center.y()) * (unscale(polylines.front().points.front()).y() - center.y())) < 0.;
+                    for (const Polyline& line : polylines) {
+                        writer.travel(center - (mirror ? 1.f : -1.f) * (unscale(line.points.front()).cast<float>() - center));
+                        for (size_t i=0; i<line.points.size(); ++i)
+                            writer.extrude(center - (mirror ? 1.f : -1.f) * (unscale(line.points[i]).cast<float>() - center));
+                    }
+                    writer.travel(pts[i].first);
+                }
+            }
+            if (++i == int(pts.size()))
+                i = 0;
+        }
+        writer.extrude(pts[start_i].first, feedrate);
+        return poly;
+    };
+
+    // outer contour (always)
+    bool infill_cone = first_layer && m_wipe_tower_width > 2*spacing && m_wipe_tower_depth > 2*spacing;
+    Polygon poly = supported_rectangle(wt_box, feedrate, infill_cone);
+
 
     // brim (first layer only)
     if (first_layer) {
         box_coordinates box = wt_box;
-        float spacing = m_perimeter_width - m_layer_height*float(1.-M_PI_4);
-        // How many perimeters shall the brim have?
         size_t loops_num = (m_wipe_tower_brim_width + spacing/2.f) / spacing;
         
         for (size_t i = 0; i < loops_num; ++ i) {
-            box.expand(spacing);
+            poly = offset(poly, scale_(spacing)).front();
-            writer.rectangle(box);
+            int cp = poly.closest_point_index(Point::new_scale(writer.x(), writer.y()));
+            writer.travel(unscale(poly.points[cp]).cast<float>());
+            for (int i=cp+1; true; ++i ) {
+                if (i==int(poly.points.size()))
+                    i = 0;
+                writer.extrude(unscale(poly.points[i]).cast<float>());
+                if (i == cp)
+                    break;
+            }
         }
 
         // Save actual brim width to be later passed to the Print object, which will use it
         // for skirt calculation and pass it to GLCanvas for precise preview box
-        m_wipe_tower_brim_width_real = wt_box.ld.x() - box.ld.x() + spacing/2.f;
+        m_wipe_tower_brim_width_real = loops_num * spacing;
-        wt_box = box;
     }
 
-    // Now prepare future wipe. box contains rectangle that was extruded last (ccw).
+    // Now prepare future wipe.
-    Vec2f target = (writer.pos() == wt_box.ld ? wt_box.rd :
+    int i = poly.closest_point_index(Point::new_scale(writer.x(), writer.y()));
-                   (writer.pos() == wt_box.rd ? wt_box.ru :
+    writer.add_wipe_point(writer.pos());
-                   (writer.pos() == wt_box.ru ? wt_box.lu :
+    writer.add_wipe_point(unscale(poly.points[i==0 ? int(poly.points.size())-1 : i-1]).cast<float>());
-                    wt_box.ld)));
-    writer.add_wipe_point(writer.pos())
-          .add_wipe_point(target);
-
 
     // Ask our writer about how much material was consumed.
     // Skip this in case the layer is sparse and config option to not print sparse layers is enabled.
-    if (! m_no_sparse_layers || toolchanges_on_layer || first_layer)
+    if (! m_no_sparse_layers || toolchanges_on_layer || first_layer) {
         if (m_current_tool < m_used_filament_length.size())
             m_used_filament_length[m_current_tool] += writer.get_and_reset_used_filament_length();
+        m_current_height += m_layer_info->height;
+    }
 
     return construct_tcr(writer, false, old_tool);
 }
 
+// Static method to get the radius and x-scaling of the stabilizing cone base.
+std::pair<double, double> WipeTower::get_wipe_tower_cone_base(double width, double height, double depth, double angle_deg)
+{
+    double R = std::tan(Geometry::deg2rad(angle_deg/2.)) * height;
+    double fake_width = 0.66 * width;
+    double diag = std::hypot(fake_width / 2., depth / 2.);
+    double support_scale = 1.;
+    if (R > diag) {
+        double w = fake_width;
+        double sin = 0.5 * depth / diag;
+        double tan = depth / w;
+        double t = (R - diag) * sin;
+        support_scale = (w / 2. + t / tan + t * tan) / (w / 2.);
+    }
+    return std::make_pair(R, support_scale);
+}
+
 // Appends a toolchange into m_plan and calculates neccessary depth of the corresponding box
 void WipeTower::plan_toolchange(float z_par, float layer_height_par, unsigned int old_tool,
                                 unsigned int new_tool, float wipe_volume)
@@ -1250,6 +1388,8 @@ void WipeTower::plan_tower()
 	m_wipe_tower_depth = 0.f;
 	for (auto& layer : m_plan)
 		layer.depth = 0.f;
+    m_wipe_tower_height = m_plan.empty() ? 0.f : m_plan.back().z;
+    m_current_height = 0.f;
 	
     for (int layer_index = int(m_plan.size()) - 1; layer_index >= 0; --layer_index)
 	{
@@ -1334,8 +1474,6 @@ void WipeTower::generate(std::vector<std::vector<WipeTower::ToolChangeResult>> &
 	if (m_plan.empty())
         return;
 
-    m_extra_spacing = 1.f;
-
 	plan_tower();
     for (int i=0;i<5;++i) {
         save_on_last_wipe();
@@ -1343,6 +1481,7 @@ void WipeTower::generate(std::vector<std::vector<WipeTower::ToolChangeResult>> &
     }
 
     m_layer_info = m_plan.begin();
+    m_current_height = 0.f;
 
     // we don't know which extruder to start with - we'll set it according to the first toolchange
     for (const auto& layer : m_plan) {
@@ -1358,7 +1497,7 @@ void WipeTower::generate(std::vector<std::vector<WipeTower::ToolChangeResult>> &
     m_old_temperature = -1; // reset last temperature written in the gcode
 
     std::vector<WipeTower::ToolChangeResult> layer_result;
-	for (auto layer : m_plan)
+	for (const WipeTower::WipeTowerInfo& layer : m_plan)
 	{
         set_layer(layer.z, layer.height, 0, false/*layer.z == m_plan.front().z*/, layer.z == m_plan.back().z);
         m_internal_rotation += 180.f;

src/libslic3r/GCode/WipeTower.hpp

@@ -23,6 +23,8 @@ class WipeTower
 public:
     static const std::string never_skip_tag() { return "_GCODE_WIPE_TOWER_NEVER_SKIP_TAG"; }
 
+	static std::pair<double, double> get_wipe_tower_cone_base(double width, double height, double depth, double angle_deg);
+
     struct Extrusion
     {
 		Extrusion(const Vec2f &pos, float width, unsigned int tool) : pos(pos), width(width), tool(tool) {}
@@ -142,6 +144,7 @@ public:
 
     float get_depth() const { return m_wipe_tower_depth; }
     float get_brim_width() const { return m_wipe_tower_brim_width_real; }
+	float get_wipe_tower_height() const { return m_wipe_tower_height; }
 
 
 
@@ -253,6 +256,8 @@ private:
     Vec2f  m_wipe_tower_pos; 			// Left front corner of the wipe tower in mm.
 	float  m_wipe_tower_width; 			// Width of the wipe tower.
 	float  m_wipe_tower_depth 	= 0.f; 	// Depth of the wipe tower
+	float  m_wipe_tower_height  = 0.f;
+	float  m_wipe_tower_cone_angle = 0.f;
     float  m_wipe_tower_brim_width      = 0.f; 	// Width of brim (mm) from config
     float  m_wipe_tower_brim_width_real = 0.f; 	// Width of brim (mm) after generation
 	float  m_wipe_tower_rotation_angle = 0.f; // Wipe tower rotation angle in degrees (with respect to x axis)
@@ -359,6 +364,10 @@ private:
 	std::vector<WipeTowerInfo> m_plan; 	// Stores information about all layers and toolchanges for the future wipe tower (filled by plan_toolchange(...))
 	std::vector<WipeTowerInfo>::iterator m_layer_info = m_plan.end();
 
+	// This sums height of all extruded layers, not counting the layers which
+	// will be later removed when the "no_sparse_layers" is used.
+	float m_current_height = 0.f;
+
     // Stores information about used filament length per extruder:
     std::vector<float> m_used_filament_length;
 

src/libslic3r/GCodeWriter.cpp

@@ -15,6 +15,12 @@
 
 namespace Slic3r {
 
+// static
+bool GCodeWriter::supports_separate_travel_acceleration(GCodeFlavor flavor)
+{
+    return (flavor == gcfRepetier || flavor == gcfMarlinFirmware ||  flavor == gcfRepRapFirmware);
+}
+
 void GCodeWriter::apply_print_config(const PrintConfig &print_config)
 {
     this->config.apply(print_config, true);
@@ -25,6 +31,8 @@ void GCodeWriter::apply_print_config(const PrintConfig &print_config)
                         || print_config.gcode_flavor.value == gcfRepRapFirmware;
     m_max_acceleration = static_cast<unsigned int>(std::round((use_mach_limits && print_config.machine_limits_usage.value == MachineLimitsUsage::EmitToGCode) ?
         print_config.machine_max_acceleration_extruding.values.front() : 0));
+    m_max_travel_acceleration = static_cast<unsigned int>(std::round((use_mach_limits && print_config.machine_limits_usage.value == MachineLimitsUsage::EmitToGCode && supports_separate_travel_acceleration(print_config.gcode_flavor.value)) ?
+        print_config.machine_max_acceleration_travel.values.front() : 0));
 }
 
 void GCodeWriter::set_extruders(std::vector<unsigned int> extruder_ids)
@@ -53,6 +61,7 @@ std::string GCodeWriter::preamble()
         FLAVOR_IS(gcfRepRapFirmware) ||
         FLAVOR_IS(gcfMarlinLegacy) ||
         FLAVOR_IS(gcfMarlinFirmware) ||
+        FLAVOR_IS(gcfKlipper) ||
         FLAVOR_IS(gcfTeacup) ||
         FLAVOR_IS(gcfRepetier) ||
         FLAVOR_IS(gcfSmoothie))
@@ -154,36 +163,31 @@ std::string GCodeWriter::set_bed_temperature(unsigned int temperature, bool wait
     return gcode.str();
 }
 
-std::string GCodeWriter::set_acceleration(unsigned int acceleration)
+std::string GCodeWriter::set_acceleration_internal(Acceleration type, unsigned int acceleration)
 {
     // Clamp the acceleration to the allowed maximum.
-    if (m_max_acceleration > 0 && acceleration > m_max_acceleration)
+    if (type == Acceleration::Print && m_max_acceleration > 0 && acceleration > m_max_acceleration)
         acceleration = m_max_acceleration;
+    if (type == Acceleration::Travel && m_max_travel_acceleration > 0 && acceleration > m_max_travel_acceleration)
+        acceleration = m_max_travel_acceleration;
 
-    if (acceleration == 0 || acceleration == m_last_acceleration)
+    // Are we setting travel acceleration for a flavour that supports separate travel and print acc?
+    bool separate_travel = (type == Acceleration::Travel && supports_separate_travel_acceleration(this->config.gcode_flavor));
+
+    auto& last_value = separate_travel ? m_last_travel_acceleration : m_last_acceleration ;
+    if (acceleration == 0 || acceleration == last_value)
         return std::string();
     
-    m_last_acceleration = acceleration;
+    last_value = acceleration;
     
     std::ostringstream gcode;
-    if (FLAVOR_IS(gcfRepetier)) {
+    if (FLAVOR_IS(gcfRepetier))
-        // M201: Set max printing acceleration
+        gcode << (separate_travel ? "M202 X" : "M201 X") << acceleration << " Y" << acceleration;
-        gcode << "M201 X" << acceleration << " Y" << acceleration;
+    else if (FLAVOR_IS(gcfRepRapFirmware) || FLAVOR_IS(gcfMarlinFirmware))
-        if (this->config.gcode_comments) gcode << " ; adjust acceleration";
+        gcode << (separate_travel ? "M204 T" : "M204 P") << acceleration;
-        gcode << "\n";
+    else
-        // M202: Set max travel acceleration
-        gcode << "M202 X" << acceleration << " Y" << acceleration;
-    } else if (FLAVOR_IS(gcfRepRapFirmware)) {
-        // M204: Set default acceleration
-        gcode << "M204 P" << acceleration;
-    } else if (FLAVOR_IS(gcfMarlinFirmware)) {
-        // This is new MarlinFirmware with separated print/retraction/travel acceleration.
-        // Use M204 P, we don't want to override travel acc by M204 S (which is deprecated anyway).
-        gcode << "M204 P" << acceleration;
-    } else {
-        // M204: Set default acceleration
         gcode << "M204 S" << acceleration;
-    }
+
     if (this->config.gcode_comments) gcode << " ; adjust acceleration";
     gcode << "\n";
     
@@ -482,6 +486,20 @@ std::string GCodeWriter::unlift()
     return gcode;
 }
 
+void GCodeWriter::update_position(const Vec3d &new_pos)
+{
+    assert(this->m_lifted >= 0);
+    const double nominal_z = m_pos.z() - m_lifted;
+    m_lifted = new_pos.z() - nominal_z;
+    if (m_lifted < - EPSILON)
+        throw Slic3r::RuntimeError("Custom G-code reports negative Z-hop. Final Z position is below the print_z height.");
+    // In case that retract_lift == layer_height we could end up with almost zero in_m_lifted
+    // and a retract could be skipped (https://github.com/prusa3d/PrusaSlicer/issues/2154
+    if (m_lifted < EPSILON)
+        m_lifted = 0.;
+    m_pos = new_pos;
+}
+
 std::string GCodeWriter::set_fan(const GCodeFlavor gcode_flavor, bool gcode_comments, unsigned int speed)
 {
     std::ostringstream gcode;

src/libslic3r/GCodeWriter.hpp

@@ -43,7 +43,8 @@ public:
     std::string postamble() const;
     std::string set_temperature(unsigned int temperature, bool wait = false, int tool = -1) const;
     std::string set_bed_temperature(unsigned int temperature, bool wait = false);
-    std::string set_acceleration(unsigned int acceleration);
+    std::string set_print_acceleration(unsigned int acceleration)   { return set_acceleration_internal(Acceleration::Print, acceleration); }
+    std::string set_travel_acceleration(unsigned int acceleration)  { return set_acceleration_internal(Acceleration::Travel, acceleration); }
     std::string reset_e(bool force = false);
     std::string update_progress(unsigned int num, unsigned int tot, bool allow_100 = false) const;
     // return false if this extruder was already selected
@@ -67,7 +68,21 @@ public:
     std::string unretract();
     std::string lift();
     std::string unlift();
+
+    // Current position of the printer, in G-code coordinates.
+    // Z coordinate of current position contains zhop. If zhop is applied (this->zhop() > 0),
+    // then the print_z = this->get_position().z() - this->zhop().
     Vec3d       get_position() const { return m_pos; }
+    // Current Z hop value.
+    double      get_zhop() const { return m_lifted; }
+    // Update position of the print head based on the final position returned by a custom G-code block.
+    // The new position Z coordinate contains the Z-hop.
+    // GCodeWriter expects the custom script to NOT change print_z, only Z-hop, thus the print_z is maintained
+    // by this function while the current Z-hop accumulator is updated.
+    void        update_position(const Vec3d &new_pos);
+
+    // Returns whether this flavor supports separate print and travel acceleration.
+    static bool supports_separate_travel_acceleration(GCodeFlavor flavor);
 
     // To be called by the CoolingBuffer from another thread.
     static std::string set_fan(const GCodeFlavor gcode_flavor, bool gcode_comments, unsigned int speed);
@@ -81,17 +96,26 @@ private:
     std::string     m_extrusion_axis;
     bool            m_single_extruder_multi_material;
     Extruder*       m_extruder;
-    unsigned int    m_last_acceleration;
+    unsigned int    m_last_acceleration = (unsigned int)(-1);
+    unsigned int    m_last_travel_acceleration = (unsigned int)(-1); // only used for flavors supporting separate print/travel acc
     // Limit for setting the acceleration, to respect the machine limits set for the Marlin firmware.
     // If set to zero, the limit is not in action.
     unsigned int    m_max_acceleration;
+    unsigned int    m_max_travel_acceleration;
+
     unsigned int    m_last_bed_temperature;
     bool            m_last_bed_temperature_reached;
     double          m_lifted;
     Vec3d           m_pos = Vec3d::Zero();
 
+    enum class Acceleration {
+        Travel,
+        Print
+    };
+
     std::string _travel_to_z(double z, const std::string &comment);
     std::string _retract(double length, double restart_extra, const std::string &comment);
+    std::string set_acceleration_internal(Acceleration type, unsigned int acceleration);
 };
 
 class GCodeFormatter {

src/libslic3r/Geometry/VoronoiUtilsCgal.cpp

@@ -128,7 +128,7 @@ inline static Linef make_linef(const VD::edge_type &edge)
     return {Vec2d(v0->x(), v0->y()), Vec2d(v1->x(), v1->y())};
 }
 
-inline static bool is_equal(const VD::vertex_type &first, const VD::vertex_type &second) { return first.x() == second.x() && first.y() == second.y(); }
+[[maybe_unused]] inline static bool is_equal(const VD::vertex_type &first, const VD::vertex_type &second) { return first.x() == second.x() && first.y() == second.y(); }
 
 // FIXME Lukas H.: Also includes parabolic segments.
 bool VoronoiUtilsCgal::is_voronoi_diagram_planar_intersection(const VD &voronoi_diagram)

src/libslic3r/I18N.hpp

@@ -3,6 +3,12 @@
 
 #include <string>
 
+#ifdef SLIC3R_CURRENTLY_COMPILING_GUI_MODULE
+    #ifndef SLIC3R_ALLOW_LIBSLIC3R_I18N_IN_SLIC3R
+        #error You included libslic3r/I18N.hpp into a file belonging to slic3r module.
+    #endif
+#endif
+
 namespace Slic3r {
 
 namespace I18N {
@@ -15,4 +21,17 @@ namespace I18N {
 
 } // namespace Slic3r
 
+// When this is included from slic3r, better do not define the translation functions.
+// Macros from slic3r/GUI/I18N.hpp should be used there.
+#ifndef SLIC3R_CURRENTLY_COMPILING_GUI_MODULE
+	#ifdef L
+	    #error L macro is defined where it shouldn't be. Didn't you include slic3r/GUI/I18N.hpp in libslic3r by mistake?
+	#endif
+	namespace {
+		[[maybe_unused]] const char* L(const char* s)    { return s; }
+		[[maybe_unused]] const char* L_CONTEXT(const char* s, const char* context) { return s; }
+		[[maybe_unused]] std::string _u8L(const char* s) { return Slic3r::I18N::translate(s); }
+	}
+#endif
+
 #endif /* slic3r_I18N_hpp_ */

src/libslic3r/Layer.cpp

@@ -1,11 +1,14 @@
 #include "Layer.hpp"
 #include "ClipperZUtils.hpp"
 #include "ClipperUtils.hpp"
+#include "Point.hpp"
+#include "Polygon.hpp"
 #include "Print.hpp"
 #include "Fill/Fill.hpp"
 #include "ShortestPath.hpp"
 #include "SVG.hpp"
 #include "BoundingBox.hpp"
+#include "clipper/clipper.hpp"
 
 #include <boost/log/trivial.hpp>
 
@@ -180,6 +183,31 @@ static void connect_layer_slices(
                                 break;
                             }
                         }
+                        if (!found) {
+                            // The check above might sometimes fail when the polygons overlap only on points, which causes the clipper to detect no intersection.
+                            // The problem happens rarely, mostly on simple polygons (in terms of number of points), but regardless of size!
+                            // example of failing link on two layers, each with single polygon without holes.
+                            // layer A = Polygon{(-24931238,-11153865),(-22504249,-8726874),(-22504249,11477151),(-23261469,12235585),(-23752371,12727276),(-25002495,12727276),(-27502745,10227026),(-27502745,-12727274),(-26504645,-12727274)}
+                            // layer B = Polygon{(-24877897,-11100524),(-22504249,-8726874),(-22504249,11477151),(-23244827,12218916),(-23752371,12727276),(-25002495,12727276),(-27502745,10227026),(-27502745,-12727274),(-26504645,-12727274)}
+                            // note that first point is not identical, and the check above picks (-24877897,-11100524) as the first contour point (polynode.Contour.front()).
+                            // that point is sadly slightly outisde of the layer A, so no link is detected, eventhough they are overlaping "completely"
+                            Polygon contour_poly;
+                            for (const auto& p : polynode.Contour) {
+                                contour_poly.points.emplace_back(p.x(), p.y());
+                            }
+                            BoundingBox contour_aabb{contour_poly.points};
+                            for (int l = int(m_above.lslices_ex.size()) - 1; l >= 0; --l) {
+                                LayerSlice &lslice = m_above.lslices_ex[l];
+                                // it is potentially slow, but should be executed rarely
+                                if (contour_aabb.overlap(lslice.bbox) && !intersection(Polygons{contour_poly}, m_above.lslices[l]).empty()) {
+                                    found = true;
+                                    j     = l;
+                                    assert(i >= 0 && i < m_below.lslices_ex.size());
+                                    assert(j >= 0 && j < m_above.lslices_ex.size());
+                                    break;
+                                }
+                            }
+                        }
                     } else {
                         // Index of an island above. Look-it up in the island below.
                         assert(j < m_offset_end);
@@ -194,6 +222,23 @@ static void connect_layer_slices(
                                 break;
                             }
                         }
+                        if (!found) { // Explanation for aditional check is above.
+                            Polygon contour_poly;
+                            for (const auto &p : polynode.Contour) {
+                                contour_poly.points.emplace_back(p.x(), p.y());
+                            }
+                            BoundingBox contour_aabb{contour_poly.points};
+                            for (int l = int(m_below.lslices_ex.size()) - 1; l >= 0; --l) {
+                                LayerSlice &lslice = m_below.lslices_ex[l];
+                                if (contour_aabb.overlap(lslice.bbox) && !intersection(Polygons{contour_poly}, m_below.lslices[l]).empty()) {
+                                    found = true;
+                                    i     = l;
+                                    assert(i >= 0 && i < m_below.lslices_ex.size());
+                                    assert(j >= 0 && j < m_above.lslices_ex.size());
+                                    break;
+                                }
+                            }
+                        }
                     }
                 } else {
                     assert(assert_intersection_valid(i, j));

src/libslic3r/Layer.hpp

@@ -368,8 +368,12 @@ public:
     void                    make_perimeters();
     // Phony version of make_fills() without parameters for Perl integration only.
     void                    make_fills() { this->make_fills(nullptr, nullptr, nullptr); }
-    void                    make_fills(FillAdaptive::Octree* adaptive_fill_octree, FillAdaptive::Octree* support_fill_octree, FillLightning::Generator* lightning_generator);
+    void                    make_fills(FillAdaptive::Octree     *adaptive_fill_octree,
-    Polylines               generate_sparse_infill_polylines_for_anchoring() const;
+                                       FillAdaptive::Octree     *support_fill_octree,
+                                       FillLightning::Generator *lightning_generator);
+    Polylines               generate_sparse_infill_polylines_for_anchoring(FillAdaptive::Octree *adaptive_fill_octree,
+                                                                           FillAdaptive::Octree *support_fill_octree,
+                                                                           FillLightning::Generator* lightning_generator) const;
     void 					make_ironing();
 
     void                    export_region_slices_to_svg(const char *path) const;

src/libslic3r/LayerRegion.cpp

@@ -291,10 +291,12 @@ Surfaces expand_bridges_detect_orientations(
             uint32_t src_id = it->src_id;
             for (++ it; it != bridge_expansions.end() && it->src_id == src_id; ++ it) ;
         }
-        for (uint32_t bridge_id = 0; bridge_id < uint32_t(bridges.size()); ++ bridge_id) {
+        for (uint32_t bridge_id = 0; bridge_id < uint32_t(bridges.size()); ++ bridge_id)
+            if (group_id(bridge_id) == bridge_id) {
+                // Head of the group.
                 acc.clear();
                 for (uint32_t bridge_id2 = bridge_id; bridge_id2 < uint32_t(bridges.size()); ++ bridge_id2)
-                if (group_id(bridge_id) == bridge_id) {
+                    if (group_id(bridge_id2) == bridge_id) {
                         append(acc, to_polygons(std::move(bridges[bridge_id2].expolygon)));
                         auto it_bridge_expansion = bridges[bridge_id2].bridge_expansion_begin;
                         assert(it_bridge_expansion == bridge_expansions.end() || it_bridge_expansion->src_id == bridge_id2);
@@ -378,7 +380,7 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
         const double custom_angle = this->region().config().bridge_angle.value;
         const auto   params = Algorithm::RegionExpansionParameters::build(expansion_bottom_bridge, expansion_step, max_nr_expansion_steps);
         bridges.surfaces = custom_angle > 0 ?
-            expand_merge_surfaces(m_fill_surfaces.surfaces, stBottomBridge, shells, params, custom_angle) :
+            expand_merge_surfaces(m_fill_surfaces.surfaces, stBottomBridge, shells, params, Geometry::deg2rad(custom_angle)) :
             expand_bridges_detect_orientations(m_fill_surfaces.surfaces, shells, params);
         BOOST_LOG_TRIVIAL(trace) << "Processing external surface, detecting bridges - done";
 #if 0
@@ -725,7 +727,7 @@ void LayerRegion::prepare_fill_surfaces()
     if (! spiral_vase && this->region().config().top_solid_layers == 0) {
         for (Surface &surface : m_fill_surfaces)
             if (surface.is_top())
-                surface.surface_type = this->layer()->object()->config().infill_only_where_needed && this->region().config().fill_pattern != ipLightning ? stInternalVoid : stInternal;
+                surface.surface_type = /*this->layer()->object()->config().infill_only_where_needed && this->region().config().fill_pattern != ipLightning ? stInternalVoid :*/ stInternal;
     }
     if (this->region().config().bottom_solid_layers == 0) {
         for (Surface &surface : m_fill_surfaces)

src/libslic3r/Model.cpp

@@ -1389,6 +1389,25 @@ void ModelObject::clone_for_cut(ModelObject** obj)
     (*obj)->input_file.clear();
 }
 
+bool ModelVolume::is_the_only_one_part() const 
+{
+    if (m_type != ModelVolumeType::MODEL_PART)
+        return false;
+    if (object == nullptr)
+        return false;
+    for (const ModelVolume *v : object->volumes) {
+        if (v == nullptr)
+            continue;
+        // is this volume?
+        if (v->id() == this->id())
+            continue;
+        // exist another model part in object?
+        if (v->type() == ModelVolumeType::MODEL_PART)
+            return false;
+    }
+    return true;
+}
+
 void ModelVolume::reset_extra_facets()
 {
     this->supported_facets.reset();

src/libslic3r/Model.hpp

@@ -835,6 +835,7 @@ public:
 	bool                is_support_blocker()    const { return m_type == ModelVolumeType::SUPPORT_BLOCKER; }
 	bool                is_support_modifier()   const { return m_type == ModelVolumeType::SUPPORT_BLOCKER || m_type == ModelVolumeType::SUPPORT_ENFORCER; }
     bool                is_text()               const { return text_configuration.has_value(); }
+    bool                is_the_only_one_part() const; // behave like an object
     t_model_material_id material_id() const { return m_material_id; }
     void                reset_extra_facets();
     void                apply_tolerance();

src/libslic3r/PerimeterGenerator.cpp

@@ -1019,11 +1019,21 @@ std::tuple<std::vector<ExtrusionPaths>, Polygons> generate_extra_perimeters_over
                                   overhang_region.end());
 
             if (!overhang_region.empty()) {
+                // there is a special case, where the first (or last) generated overhang perimeter eats all anchor space.
+                // When this happens, the first overhang perimeter is also a closed loop, and needs special check
+                // instead of the following simple is_anchored lambda, which checks only the first and last point (not very useful on closed
+                // polyline)
+                bool first_overhang_is_closed_and_anchored =
+                    (overhang_region.front().first_point() == overhang_region.front().last_point() &&
+                     !intersection_pl(overhang_region.front().polyline, optimized_lower_slices).empty());
+                     
                 auto is_anchored = [&lower_layer_aabb_tree](const ExtrusionPath &path) {
                     return lower_layer_aabb_tree.distance_from_lines<true>(path.first_point()) <= 0 ||
                            lower_layer_aabb_tree.distance_from_lines<true>(path.last_point()) <= 0;
                 };
+                if (!first_overhang_is_closed_and_anchored) {
                     std::reverse(overhang_region.begin(), overhang_region.end());
+                }
                 auto first_unanchored          = std::stable_partition(overhang_region.begin(), overhang_region.end(), is_anchored);
                 int  index_of_first_unanchored = first_unanchored - overhang_region.begin();
                 overhang_region = sort_extra_perimeters(overhang_region, index_of_first_unanchored, overhang_flow.scaled_spacing());

src/libslic3r/PlaceholderParser.hpp

@@ -21,6 +21,9 @@ public:
     // and shared between the PlaceholderParser::process() invocations.
     struct ContextData {
         std::mt19937                    rng;
+        // If defined, then this dictionary is used by the scripts to define user variables and persist them
+        // between PlaceholderParser evaluations.
+        std::unique_ptr<DynamicConfig>  global_config;
     };
 
     PlaceholderParser(const DynamicConfig *external_config = nullptr);
@@ -55,7 +58,9 @@ public:
 
     // Fill in the template using a macro processing language.
     // Throws Slic3r::PlaceholderParserError on syntax or runtime error.
-    std::string process(const std::string &templ, unsigned int current_extruder_id = 0, const DynamicConfig *config_override = nullptr, ContextData *context = nullptr) const;
+    std::string process(const std::string &templ, unsigned int current_extruder_id, const DynamicConfig *config_override, DynamicConfig *config_outputs, ContextData *context) const;
+    std::string process(const std::string &templ, unsigned int current_extruder_id = 0, const DynamicConfig *config_override = nullptr, ContextData *context = nullptr) const
+        { return this->process(templ, current_extruder_id, config_override, nullptr /* config_outputs */, context); }
 
     // Evaluate a boolean expression using the full expressive power of the PlaceholderParser boolean expression syntax.
     // Throws Slic3r::PlaceholderParserError on syntax or runtime error.

src/libslic3r/Preset.cpp

@@ -3,6 +3,7 @@
 #include "Exception.hpp"
 #include "Preset.hpp"
 #include "AppConfig.hpp"
+#include "I18N.hpp"
 
 #ifdef _MSC_VER
     #define WIN32_LEAN_AND_MEAN
@@ -10,15 +11,6 @@
     #include <Windows.h>
 #endif /* _MSC_VER */
 
-// instead of #include "slic3r/GUI/I18N.hpp" :
-#ifndef L
-// !!! If you needed to translate some string,
-// !!! please use _L(string)
-// !!! _() - is a standard wxWidgets macro to translate
-// !!! L() is used only for marking localizable string
-// !!! It will be used in "xgettext" to create a Locating Message Catalog.
-#define L(s) s
-#endif /* L */
 
 #include <algorithm>
 #include <fstream>
@@ -433,7 +425,7 @@ static std::vector<std::string> s_Preset_print_options {
     "top_solid_layers", "top_solid_min_thickness", "bottom_solid_layers", "bottom_solid_min_thickness",
     "extra_perimeters", "extra_perimeters_on_overhangs", "avoid_crossing_curled_overhangs", "avoid_crossing_perimeters", "thin_walls", "overhangs",
     "seam_position","staggered_inner_seams", "external_perimeters_first", "fill_density", "fill_pattern", "top_fill_pattern", "bottom_fill_pattern",
-    "infill_every_layers", "infill_only_where_needed", "solid_infill_every_layers", "fill_angle", "bridge_angle",
+    "infill_every_layers", /*"infill_only_where_needed",*/ "solid_infill_every_layers", "fill_angle", "bridge_angle",
     "solid_infill_below_area", "only_retract_when_crossing_perimeters", "infill_first",
     "ironing", "ironing_type", "ironing_flowrate", "ironing_speed", "ironing_spacing",
     "max_print_speed", "max_volumetric_speed", "avoid_crossing_perimeters_max_detour",
@@ -443,7 +435,7 @@ static std::vector<std::string> s_Preset_print_options {
     "enable_dynamic_overhang_speeds", "overhang_speed_0", "overhang_speed_1", "overhang_speed_2", "overhang_speed_3",
     "top_solid_infill_speed", "support_material_speed", "support_material_xy_spacing", "support_material_interface_speed",
     "bridge_speed", "gap_fill_speed", "gap_fill_enabled", "travel_speed", "travel_speed_z", "first_layer_speed", "first_layer_speed_over_raft", "perimeter_acceleration", "infill_acceleration",
-    "external_perimeter_acceleration", "top_solid_infill_acceleration", "solid_infill_acceleration",
+    "external_perimeter_acceleration", "top_solid_infill_acceleration", "solid_infill_acceleration", "travel_acceleration",
     "bridge_acceleration", "first_layer_acceleration", "first_layer_acceleration_over_raft", "default_acceleration", "skirts", "skirt_distance", "skirt_height", "draft_shield",
     "min_skirt_length", "brim_width", "brim_separation", "brim_type", "support_material", "support_material_auto", "support_material_threshold", "support_material_enforce_layers",
     "raft_layers", "raft_first_layer_density", "raft_first_layer_expansion", "raft_contact_distance", "raft_expansion",
@@ -460,8 +452,8 @@ static std::vector<std::string> s_Preset_print_options {
     "perimeter_extrusion_width", "external_perimeter_extrusion_width", "infill_extrusion_width", "solid_infill_extrusion_width",
     "top_infill_extrusion_width", "support_material_extrusion_width", "infill_overlap", "infill_anchor", "infill_anchor_max", "bridge_flow_ratio",
     "elefant_foot_compensation", "xy_size_compensation", "threads", "resolution", "gcode_resolution", "wipe_tower", "wipe_tower_x", "wipe_tower_y",
-    "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_brim_width", "wipe_tower_bridging", "single_extruder_multi_material_priming", "mmu_segmented_region_max_width",
+    "wipe_tower_width", "wipe_tower_cone_angle", "wipe_tower_rotation_angle", "wipe_tower_brim_width", "wipe_tower_bridging", "single_extruder_multi_material_priming", "mmu_segmented_region_max_width",
-    "wipe_tower_no_sparse_layers", "compatible_printers", "compatible_printers_condition", "inherits",
+    "wipe_tower_no_sparse_layers", "wipe_tower_extra_spacing", "compatible_printers", "compatible_printers_condition", "inherits",
     "perimeter_generator", "wall_transition_length", "wall_transition_filter_deviation", "wall_transition_angle",
     "wall_distribution_count", "min_feature_size", "min_bead_width"
 };
@@ -491,7 +483,7 @@ static std::vector<std::string> s_Preset_machine_limits_options {
 };
 
 static std::vector<std::string> s_Preset_printer_options {
-    "printer_technology",
+    "printer_technology", "autoemit_temperature_commands",
     "bed_shape", "bed_custom_texture", "bed_custom_model", "z_offset", "gcode_flavor", "use_relative_e_distances",
     "use_firmware_retraction", "use_volumetric_e", "variable_layer_height",
     //FIXME the print host keys are left here just for conversion from the Printer preset to Physical Printer preset.

src/libslic3r/Print.cpp

@@ -14,19 +14,19 @@
 #include "GCode/WipeTower.hpp"
 #include "Utils.hpp"
 #include "BuildVolume.hpp"
+#include "format.hpp"
 
 #include <float.h>
 
 #include <algorithm>
 #include <limits>
+#include <string>
 #include <unordered_set>
 #include <boost/filesystem/path.hpp>
 #include <boost/format.hpp>
 #include <boost/log/trivial.hpp>
 #include <boost/regex.hpp>
 
-// Mark string for localization and translate.
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r {
 
@@ -58,6 +58,7 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
     // Cache the plenty of parameters, which influence the G-code generator only,
     // or they are only notes not influencing the generated G-code.
     static std::unordered_set<std::string> steps_gcode = {
+        "autoemit_temperature_commands",
         "avoid_crossing_perimeters",
         "avoid_crossing_perimeters_max_detour",
         "bed_shape",
@@ -137,6 +138,7 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "start_filament_gcode",
         "toolchange_gcode",
         "top_solid_infill_acceleration",
+        "travel_acceleration",
         "thumbnails",
         "thumbnails_format",
         "use_firmware_retraction",
@@ -203,7 +205,9 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
             || opt_key == "wipe_tower"
             || opt_key == "wipe_tower_width"
             || opt_key == "wipe_tower_brim_width"
+            || opt_key == "wipe_tower_cone_angle"
             || opt_key == "wipe_tower_bridging"
+            || opt_key == "wipe_tower_extra_spacing"
             || opt_key == "wipe_tower_no_sparse_layers"
             || opt_key == "wiping_volumes_matrix"
             || opt_key == "parking_pos_retraction"
@@ -460,20 +464,20 @@ std::string Print::validate(std::string* warning) const
     std::vector<unsigned int> extruders = this->extruders();
 
     if (m_objects.empty())
-        return L("All objects are outside of the print volume.");
+        return _u8L("All objects are outside of the print volume.");
 
     if (extruders.empty())
-        return L("The supplied settings will cause an empty print.");
+        return _u8L("The supplied settings will cause an empty print.");
 
     if (m_config.complete_objects) {
     	if (! sequential_print_horizontal_clearance_valid(*this))
-            return L("Some objects are too close; your extruder will collide with them.");
+            return _u8L("Some objects are too close; your extruder will collide with them.");
         if (! sequential_print_vertical_clearance_valid(*this))
-	        return L("Some objects are too tall and cannot be printed without extruder collisions.");
+	        return _u8L("Some objects are too tall and cannot be printed without extruder collisions.");
     }
 
     if (m_config.avoid_crossing_perimeters && m_config.avoid_crossing_curled_overhangs) {
-        return L("Avoid crossing perimeters option and avoid crossing curled overhangs option cannot be both enabled together.");
+        return _u8L("Avoid crossing perimeters option and avoid crossing curled overhangs option cannot be both enabled together.");
     }    
 
     if (m_config.spiral_vase) {
@@ -482,13 +486,17 @@ std::string Print::validate(std::string* warning) const
             total_copies_count += object->instances().size();
         // #4043
         if (total_copies_count > 1 && ! m_config.complete_objects.value)
-            return L("Only a single object may be printed at a time in Spiral Vase mode. "
+            return _u8L("Only a single object may be printed at a time in Spiral Vase mode. "
                      "Either remove all but the last object, or enable sequential mode by \"complete_objects\".");
         assert(m_objects.size() == 1);
         if (m_objects.front()->all_regions().size() > 1)
-            return L("The Spiral Vase option can only be used when printing single material objects.");
+            return _u8L("The Spiral Vase option can only be used when printing single material objects.");
     }
 
+    if (m_config.machine_limits_usage == MachineLimitsUsage::EmitToGCode && m_config.gcode_flavor == gcfKlipper)
+        return L("Machine limits cannot be emitted to G-Code when Klipper firmware flavor is used. "
+                 "Change the value of machine_limits_usage.");
+
     // Cache of layer height profiles for checking:
     // 1) Whether all layers are synchronized if printing with wipe tower and / or unsynchronized supports.
     // 2) Whether layer height is constant for Organic supports.
@@ -510,7 +518,7 @@ std::string Print::validate(std::string* warning) const
         //FIXME It is quite expensive to generate object layers just to get the print height!
         if (auto layers = generate_object_layers(print_object.slicing_parameters(), layer_height_profile(print_object_idx));
             ! layers.empty() && layers.back() > this->config().max_print_height + EPSILON) {
-            return L("The print is taller than the maximum allowed height. You might want to reduce the size of your model"
+            return _u8L("The print is taller than the maximum allowed height. You might want to reduce the size of your model"
                      " or change current print settings and retry.");
         }
     }
@@ -527,7 +535,7 @@ std::string Print::validate(std::string* warning) const
             print_object.model_object()->has_custom_layering()) {
             if (const std::vector<coordf_t> &layers = layer_height_profile(print_object_idx); ! layers.empty())
                 if (! check_object_layers_fixed(print_object.slicing_parameters(), layers))
-                    return L("Variable layer height is not supported with Organic supports.");
+                    return _u8L("Variable layer height is not supported with Organic supports.");
         }
 
     if (this->has_wipe_tower() && ! m_objects.empty()) {
@@ -540,21 +548,22 @@ std::string Print::validate(std::string* warning) const
             double filament_diam = m_config.filament_diameter.get_at(extruder_idx);
             if (nozzle_diam - EPSILON > first_nozzle_diam || nozzle_diam + EPSILON < first_nozzle_diam
              || std::abs((filament_diam-first_filament_diam)/first_filament_diam) > 0.1)
-                 return L("The wipe tower is only supported if all extruders have the same nozzle diameter "
+                 return _u8L("The wipe tower is only supported if all extruders have the same nozzle diameter "
                           "and use filaments of the same diameter.");
         }
 
         if (m_config.gcode_flavor != gcfRepRapSprinter && m_config.gcode_flavor != gcfRepRapFirmware &&
-            m_config.gcode_flavor != gcfRepetier && m_config.gcode_flavor != gcfMarlinLegacy && m_config.gcode_flavor != gcfMarlinFirmware)
+            m_config.gcode_flavor != gcfRepetier && m_config.gcode_flavor != gcfMarlinLegacy &&
-            return L("The Wipe Tower is currently only supported for the Marlin, RepRap/Sprinter, RepRapFirmware and Repetier G-code flavors.");
+            m_config.gcode_flavor != gcfMarlinFirmware && m_config.gcode_flavor != gcfKlipper)
+            return _u8L("The Wipe Tower is currently only supported for the Marlin, Klipper, RepRap/Sprinter, RepRapFirmware and Repetier G-code flavors.");
         if (! m_config.use_relative_e_distances)
-            return L("The Wipe Tower is currently only supported with the relative extruder addressing (use_relative_e_distances=1).");
+            return _u8L("The Wipe Tower is currently only supported with the relative extruder addressing (use_relative_e_distances=1).");
         if (m_config.ooze_prevention && m_config.single_extruder_multi_material)
-            return L("Ooze prevention is only supported with the wipe tower when 'single_extruder_multi_material' is off.");
+            return _u8L("Ooze prevention is only supported with the wipe tower when 'single_extruder_multi_material' is off.");
         if (m_config.use_volumetric_e)
-            return L("The Wipe Tower currently does not support volumetric E (use_volumetric_e=0).");
+            return _u8L("The Wipe Tower currently does not support volumetric E (use_volumetric_e=0).");
         if (m_config.complete_objects && extruders.size() > 1)
-            return L("The Wipe Tower is currently not supported for multimaterial sequential prints.");
+            return _u8L("The Wipe Tower is currently not supported for multimaterial sequential prints.");
         
         if (m_objects.size() > 1) {
             const SlicingParameters     &slicing_params0       = m_objects.front()->slicing_parameters();
@@ -564,14 +573,14 @@ std::string Print::validate(std::string* warning) const
                 const SlicingParameters &slicing_params = object->slicing_parameters();
                 if (std::abs(slicing_params.first_print_layer_height - slicing_params0.first_print_layer_height) > EPSILON ||
                     std::abs(slicing_params.layer_height             - slicing_params0.layer_height            ) > EPSILON)
-                    return L("The Wipe Tower is only supported for multiple objects if they have equal layer heights");
+                    return _u8L("The Wipe Tower is only supported for multiple objects if they have equal layer heights");
                 if (slicing_params.raft_layers() != slicing_params0.raft_layers())
-                    return L("The Wipe Tower is only supported for multiple objects if they are printed over an equal number of raft layers");
+                    return _u8L("The Wipe Tower is only supported for multiple objects if they are printed over an equal number of raft layers");
                 if (slicing_params0.gap_object_support != slicing_params.gap_object_support ||
                     slicing_params0.gap_support_object != slicing_params.gap_support_object)
-                    return L("The Wipe Tower is only supported for multiple objects if they are printed with the same support_material_contact_distance");
+                    return _u8L("The Wipe Tower is only supported for multiple objects if they are printed with the same support_material_contact_distance");
                 if (! equal_layering(slicing_params, slicing_params0))
-                    return L("The Wipe Tower is only supported for multiple objects if they are sliced equally.");
+                    return _u8L("The Wipe Tower is only supported for multiple objects if they are sliced equally.");
                 if (has_custom_layering) {
                     auto &lh         = layer_height_profile(i);
                     auto &lh_tallest = layer_height_profile(tallest_object_idx);
@@ -596,7 +605,7 @@ std::string Print::validate(std::string* warning) const
                         if (i%2 == 0 && layer_height_profiles[tallest_object_idx][i] > layer_height_profiles[idx_object][layer_height_profiles[idx_object].size() - 2 ])
                             break;
                         if (std::abs(layer_height_profiles[idx_object][i] - layer_height_profiles[tallest_object_idx][i]) > eps)
-                            return L("The Wipe tower is only supported if all objects have the same variable layer height");
+                            return _u8L("The Wipe tower is only supported if all objects have the same variable layer height");
                         ++i;
                     }
                 }
@@ -620,7 +629,7 @@ std::string Print::validate(std::string* warning) const
         unsigned int total_extruders_count = m_config.nozzle_diameter.size();
         for (const auto& extruder_idx : extruders)
             if ( extruder_idx >= total_extruders_count )
-                return L("One or more object were assigned an extruder that the printer does not have.");
+                return _u8L("One or more object were assigned an extruder that the printer does not have.");
 #endif
 
         auto validate_extrusion_width = [/*min_nozzle_diameter,*/ max_nozzle_diameter](const ConfigBase &config, const char *opt_key, double layer_height, std::string &err_msg) -> bool {
@@ -633,10 +642,10 @@ std::string Print::validate(std::string* warning) const
         	if (extrusion_width_min == 0) {
         		// Default "auto-generated" extrusion width is always valid.
         	} else if (extrusion_width_min <= layer_height) {
-        		err_msg = (boost::format(L("%1%=%2% mm is too low to be printable at a layer height %3% mm")) % opt_key % extrusion_width_min % layer_height).str();
+        		err_msg = (boost::format(_u8L("%1%=%2% mm is too low to be printable at a layer height %3% mm")) % opt_key % extrusion_width_min % layer_height).str();
 				return false;
 			} else if (extrusion_width_max >= max_nozzle_diameter * 3.) {
-				err_msg = (boost::format(L("Excessive %1%=%2% mm to be printable with a nozzle diameter %3% mm")) % opt_key % extrusion_width_max % max_nozzle_diameter).str();
+				err_msg = (boost::format(_u8L("Excessive %1%=%2% mm to be printable with a nozzle diameter %3% mm")) % opt_key % extrusion_width_max % max_nozzle_diameter).str();
 				return false;
 			}
 			return true;
@@ -647,7 +656,7 @@ std::string Print::validate(std::string* warning) const
                     // The object has some form of support and either support_material_extruder or support_material_interface_extruder
                     // will be printed with the current tool without a forced tool change. Play safe, assert that all object nozzles
                     // are of the same diameter.
-                    return L("Printing with multiple extruders of differing nozzle diameters. "
+                    return _u8L("Printing with multiple extruders of differing nozzle diameters. "
                            "If support is to be printed with the current extruder (support_material_extruder == 0 or support_material_interface_extruder == 0), "
                            "all nozzles have to be of the same diameter.");
                 }
@@ -655,11 +664,11 @@ std::string Print::validate(std::string* warning) const
     				if (object->config().support_material_contact_distance == 0) {
     					// Soluble interface
     					if (! object->config().support_material_synchronize_layers)
-    						return L("For the Wipe Tower to work with the soluble supports, the support layers need to be synchronized with the object layers.");
+    						return _u8L("For the Wipe Tower to work with the soluble supports, the support layers need to be synchronized with the object layers.");
     				} else {
     					// Non-soluble interface
     					if (object->config().support_material_extruder != 0 || object->config().support_material_interface_extruder != 0)
-    						return L("The Wipe Tower currently supports the non-soluble supports only if they are printed with the current extruder without triggering a tool change. "
+    						return _u8L("The Wipe Tower currently supports the non-soluble supports only if they are printed with the current extruder without triggering a tool change. "
     							     "(both support_material_extruder and support_material_interface_extruder need to be set to 0).");
     				}
                 }
@@ -695,12 +704,12 @@ std::string Print::validate(std::string* warning) const
                 first_layer_min_nozzle_diameter = min_nozzle_diameter;
             }
             if (first_layer_height > first_layer_min_nozzle_diameter)
-                return L("First layer height can't be greater than nozzle diameter");
+                return _u8L("First layer height can't be greater than nozzle diameter");
             
             // validate layer_height
             double layer_height = object->config().layer_height.value;
             if (layer_height > min_nozzle_diameter)
-                return L("Layer height can't be greater than nozzle diameter");
+                return _u8L("Layer height can't be greater than nozzle diameter");
 
             // Validate extrusion widths.
             std::string err_msg;
@@ -721,11 +730,11 @@ std::string Print::validate(std::string* warning) const
             // See GH issues #6336 #5073
             if ((m_config.gcode_flavor == gcfMarlinLegacy || m_config.gcode_flavor == gcfMarlinFirmware) &&
                 ! before_layer_gcode_resets_extruder && ! layer_gcode_resets_extruder)
-                return L("Relative extruder addressing requires resetting the extruder position at each layer to prevent loss of floating point accuracy. Add \"G92 E0\" to layer_gcode.");
+                return _u8L("Relative extruder addressing requires resetting the extruder position at each layer to prevent loss of floating point accuracy. Add \"G92 E0\" to layer_gcode.");
         } else if (before_layer_gcode_resets_extruder)
-            return L("\"G92 E0\" was found in before_layer_gcode, which is incompatible with absolute extruder addressing.");
+            return _u8L("\"G92 E0\" was found in before_layer_gcode, which is incompatible with absolute extruder addressing.");
         else if (layer_gcode_resets_extruder)
-                return L("\"G92 E0\" was found in layer_gcode, which is incompatible with absolute extruder addressing.");
+                return _u8L("\"G92 E0\" was found in layer_gcode, which is incompatible with absolute extruder addressing.");
     }
 
     return std::string();
@@ -867,7 +876,7 @@ void Print::process()
     BOOST_LOG_TRIVIAL(info) << "Starting the slicing process." << log_memory_info();
     for (PrintObject *obj : m_objects)
         obj->make_perimeters();
-    this->set_status(70, L("Infilling layers"));
+    this->set_status(70, _u8L("Infilling layers"));
     for (PrintObject *obj : m_objects)
         obj->infill();
     for (PrintObject *obj : m_objects)
@@ -884,7 +893,7 @@ void Print::process()
         m_wipe_tower_data.clear();
         m_tool_ordering.clear();
         if (this->has_wipe_tower()) {
-            //this->set_status(95, L("Generating wipe tower"));
+            //this->set_status(95, _u8L("Generating wipe tower"));
             this->_make_wipe_tower();
         } else if (! this->config().complete_objects.value) {
         	// Initialize the tool ordering, so it could be used by the G-code preview slider for planning tool changes and filament switches.
@@ -895,7 +904,7 @@ void Print::process()
         this->set_done(psWipeTower);
     }
     if (this->set_started(psSkirtBrim)) {
-        this->set_status(88, L("Generating skirt and brim"));
+        this->set_status(88, _u8L("Generating skirt and brim"));
 
         m_skirt.clear();
         m_skirt_convex_hull.clear();
@@ -943,11 +952,11 @@ std::string Print::export_gcode(const std::string& path_template, GCodeProcessor
     std::string message;
     if (!path.empty() && result == nullptr) {
         // Only show the path if preview_data is not set -> running from command line.
-        message = L("Exporting G-code");
+        message = _u8L("Exporting G-code");
         message += " to ";
         message += path;
     } else
-        message = L("Generating G-code");
+        message = _u8L("Generating G-code");
     this->set_status(90, message);
 
     // Create GCode on heap, it has quite a lot of data.
@@ -1121,23 +1130,34 @@ Polygons Print::first_layer_islands() const
 
 std::vector<Point> Print::first_layer_wipe_tower_corners() const
 {
-    std::vector<Point> corners;
+    std::vector<Point> pts_scaled;
+
     if (has_wipe_tower() && ! m_wipe_tower_data.tool_changes.empty()) {
         double width = m_config.wipe_tower_width + 2*m_wipe_tower_data.brim_width;
         double depth = m_wipe_tower_data.depth + 2*m_wipe_tower_data.brim_width;
         Vec2d pt0(-m_wipe_tower_data.brim_width, -m_wipe_tower_data.brim_width);
-        for (Vec2d pt : {
+        
-                pt0,
+        // First the corners.
-                Vec2d(pt0.x()+width, pt0.y()      ),
+        std::vector<Vec2d> pts = { pt0,
+                                   Vec2d(pt0.x()+width, pt0.y()),
                                    Vec2d(pt0.x()+width, pt0.y()+depth),
-                Vec2d(pt0.x(),       pt0.y()+depth)
+                                   Vec2d(pt0.x(),pt0.y()+depth)
-            }) {
+                                 };
+
+        // Now the stabilization cone.
+        Vec2d center = (pts[0] + pts[2])/2.;
+        const auto [cone_R, cone_x_scale] = WipeTower::get_wipe_tower_cone_base(m_config.wipe_tower_width, m_wipe_tower_data.height, m_wipe_tower_data.depth, m_config.wipe_tower_cone_angle);
+        double r = cone_R + m_wipe_tower_data.brim_width;
+        for (double alpha = 0.; alpha<2*M_PI; alpha += M_PI/20.)
+            pts.emplace_back(center + r*Vec2d(std::cos(alpha)/cone_x_scale, std::sin(alpha)));
+
+        for (Vec2d& pt : pts) {
             pt = Eigen::Rotation2Dd(Geometry::deg2rad(m_config.wipe_tower_rotation_angle.value)) * pt;
             pt += Vec2d(m_config.wipe_tower_x.value, m_config.wipe_tower_y.value);
-            corners.emplace_back(Point(scale_(pt.x()), scale_(pt.y())));
+            pts_scaled.emplace_back(Point(scale_(pt.x()), scale_(pt.y())));
         }
     }
-    return corners;
+    return pts_scaled;
 }
 
 void Print::finalize_first_layer_convex_hull()
@@ -1156,26 +1176,71 @@ void Print::alert_when_supports_needed()
 {
     if (this->set_started(psAlertWhenSupportsNeeded)) {
         BOOST_LOG_TRIVIAL(debug) << "psAlertWhenSupportsNeeded - start";
-        set_status(69, L("Alert if supports needed"));
+        set_status(69, _u8L("Alert if supports needed"));
 
         auto issue_to_alert_message = [](SupportSpotsGenerator::SupportPointCause cause, bool critical) {
             std::string message;
             switch (cause) {
-            case SupportSpotsGenerator::SupportPointCause::LongBridge: message = L("long bridging extrusions"); break;
+            //TRN Alert when support is needed. Describes that the model has long bridging extrusions which may print badly 
-            case SupportSpotsGenerator::SupportPointCause::FloatingBridgeAnchor: message = L("floating bridge anchors"); break;
+            case SupportSpotsGenerator::SupportPointCause::LongBridge: message = _u8L("Long bridging extrusions"); break;
+            //TRN Alert when support is needed. Describes bridge anchors/turns in the air, which will definitely print badly
+            case SupportSpotsGenerator::SupportPointCause::FloatingBridgeAnchor: message = _u8L("Floating bridge anchors"); break;
             case SupportSpotsGenerator::SupportPointCause::FloatingExtrusion:
                 if (critical) {
-                    message = L("collapsing overhang");
+                     //TRN Alert when support is needed. Describes that the print has large overhang area which will print badly or not print at all.
+                    message = _u8L("Collapsing overhang");
                 } else {
-                    message = L("loose extrusions");
+                    //TRN Alert when support is needed. Describes extrusions that are not supported enough and come out curled or loose.
+                    message = _u8L("Loose extrusions");
                 }
                 break;
-            case SupportSpotsGenerator::SupportPointCause::SeparationFromBed: message = L("low bed adhesion"); break;
+            //TRN Alert when support is needed. Describes that the print has low bed adhesion and may became loose.
-            case SupportSpotsGenerator::SupportPointCause::UnstableFloatingPart: message = L("floating object part"); break;
+            case SupportSpotsGenerator::SupportPointCause::SeparationFromBed: message = _u8L("Low bed adhesion"); break;
-            case SupportSpotsGenerator::SupportPointCause::WeakObjectPart: message = L("thin fragile section"); break;
+            //TRN Alert when support is needed. Describes that the object has part that is not connected to the bed and will not print at all without supports.
+            case SupportSpotsGenerator::SupportPointCause::UnstableFloatingPart: message = _u8L("Floating object part"); break;
+            //TRN Alert when support is needed. Describes that the object has thin part that may brake during printing 
+            case SupportSpotsGenerator::SupportPointCause::WeakObjectPart: message = _u8L("Thin fragile part"); break;
             }
 
-            return  (critical ? "!" : "") + message;
+            return message;
+        };
+
+        // TRN this translation rule is used to translate lists of uknown size on single line. The first argument is element of the list,
+        // the second argument may be element or rest of the list. For most languages, this does not need translation, but some use different 
+        // separator than comma and some use blank space in front of the separator.
+        auto single_line_list_rule = L("%1%, %2%");
+        auto multiline_list_rule   = "%1%\n%2%";
+
+        auto elements_to_translated_list = [](const std::vector<std::string> &translated_elements, std::string expansion_rule) {
+            if (expansion_rule.find("%1%") == expansion_rule.npos || expansion_rule.find("%2%") == expansion_rule.npos) {
+                BOOST_LOG_TRIVIAL(error) << "INCORRECT EXPANSION RULE FOR LIST TRANSLATION: " << expansion_rule
+                                         << " - IT SHOULD CONTAIN %1% and %2%!";
+                expansion_rule = "%1% %2%";
+            }
+            if (translated_elements.size() == 0) {
+                return std::string{};
+            }
+            if (translated_elements.size() == 1) {
+                return translated_elements.front();
+            }
+
+            std::string translated_list = expansion_rule;
+            for (int i = 0; i < translated_elements.size() - 1; i++) {
+                auto first_elem = translated_list.find("%1%");
+                assert(first_elem != translated_list.npos);
+                translated_list.replace(first_elem, 3, translated_elements[i]);
+
+                // expand the translated list by another application of the same rule
+                auto second_elem = translated_list.find("%2%");
+                assert(second_elem != translated_list.npos);
+                if (i < translated_elements.size() - 2) {
+                    translated_list.replace(second_elem, 3, expansion_rule);
+                } else {
+                    translated_list.replace(second_elem, 3, translated_elements[i + 1]);
+                }
+            }
+
+            return translated_list;
         };
 
         // vector of pairs of object and its issues, where each issue is a pair of type and critical flag
@@ -1202,40 +1267,53 @@ void Print::alert_when_supports_needed()
         for (const auto &obj : objects_isssues) {
             for (const auto &issue : obj.second) {
                 po_by_support_issues[issue].push_back(obj.first);
-                if (issue.first == SupportSpotsGenerator::SupportPointCause::SeparationFromBed && !obj.first->has_brim()){
+                if (issue.first == SupportSpotsGenerator::SupportPointCause::SeparationFromBed && !obj.first->has_brim()) {
                     recommend_brim = true;
                 }
             }
         }
 
-        auto message = L("Detected print stability issues") + ": \n";
+        std::vector<std::pair<std::string, std::vector<std::string>>> message_elements;
         if (objects_isssues.size() > po_by_support_issues.size()) {
             // there are more objects than causes, group by issues
             for (const auto &issue : po_by_support_issues) {
-                message += "\n" + issue_to_alert_message(issue.first.first, issue.first.second) + "  >>  ";
+                auto &pair = message_elements.emplace_back(issue_to_alert_message(issue.first.first, issue.first.second),
+                                                           std::vector<std::string>{});
                 for (const auto &obj : issue.second) {
-                    message += obj->m_model_object->name + ", ";
+                    pair.second.push_back(obj->m_model_object->name);
                 }
-                message.pop_back();
-                message.pop_back(); // remove ,
-                message += ".\n";
             }
         } else {
             // more causes than objects, group by objects
             for (const auto &obj : objects_isssues) {
-                message += "\n" + L("Object") + " " + obj.first->model_object()->name + "  <<  ";
+                auto &pair = message_elements.emplace_back(obj.first->model_object()->name,  std::vector<std::string>{});
                 for (const auto &issue : obj.second) {
-                    message += issue_to_alert_message(issue.first, issue.second) + ", ";
+                    pair.second.push_back(issue_to_alert_message(issue.first, issue.second));
                 }
-                message.pop_back();
-                message.pop_back(); // remove ,
-                message += ".\n";
             }
         }
 
-        bool brim_or_supp = recommend_brim && po_by_support_issues.size() < 2;
+        // first, gather sublements into single line list, store in first subelement
-        auto brim_part = " " + (brim_or_supp ? L("or") : L("and")) + " " + L("brim");
+        for (auto &pair : message_elements) {
-        message += "\n" + L("Consider enabling supports") + (recommend_brim ? brim_part : "") + ".";
+            pair.second.front() = elements_to_translated_list(pair.second, single_line_list_rule);
+        }
+
+        // then gather elements to create multiline list
+        std::vector<std::string> lines = {};
+        for (auto &pair : message_elements) {
+            lines.push_back(""); // empty line for readability
+            lines.push_back(pair.first);
+            lines.push_back(pair.second.front());
+        }
+
+        lines.push_back("");
+        lines.push_back(_u8L("Consider enabling supports."));
+        if (recommend_brim) {
+            lines.push_back(_u8L("Also consider enabling brim."));
+        }
+
+        // TRN Alert message for detected print issues. first argument is a list of detected issues.
+        auto message = Slic3r::format(_u8L("Detected print stability issues:\n%1%"), elements_to_translated_list(lines, multiline_list_rule));
 
         if (objects_isssues.size() > 0) {
             this->active_step_add_warning(PrintStateBase::WarningLevel::NON_CRITICAL, message);
@@ -1377,6 +1455,7 @@ void Print::_make_wipe_tower()
     wipe_tower.generate(m_wipe_tower_data.tool_changes);
     m_wipe_tower_data.depth = wipe_tower.get_depth();
     m_wipe_tower_data.brim_width = wipe_tower.get_brim_width();
+    m_wipe_tower_data.height = wipe_tower.get_wipe_tower_height();
 
     // Unload the current filament over the purge tower.
     coordf_t layer_height = m_objects.front()->config().layer_height.value;

src/libslic3r/Print.hpp

@@ -1,6 +1,8 @@
 #ifndef slic3r_Print_hpp_
 #define slic3r_Print_hpp_
 
+#include "Fill/FillAdaptive.hpp"
+#include "Fill/FillLightning.hpp"
 #include "PrintBase.hpp"
 
 #include "BoundingBox.hpp"
@@ -385,7 +387,8 @@ private:
     void discover_horizontal_shells();
     void combine_infill();
     void _generate_support_material();
-    std::pair<FillAdaptive::OctreePtr, FillAdaptive::OctreePtr> prepare_adaptive_infill_data();
+    std::pair<FillAdaptive::OctreePtr, FillAdaptive::OctreePtr> prepare_adaptive_infill_data(
+        const std::vector<std::pair<const Surface*, float>>& surfaces_w_bottom_z) const;
     FillLightning::GeneratorPtr prepare_lightning_infill_data();
 
     // XYZ in scaled coordinates
@@ -410,6 +413,9 @@ private:
     // this is set to true when LayerRegion->slices is split in top/internal/bottom
     // so that next call to make_perimeters() performs a union() before computing loops
     bool                    				m_typed_slices = false;
+
+    std::pair<FillAdaptive::OctreePtr, FillAdaptive::OctreePtr> m_adaptive_fill_octrees;
+    FillLightning::GeneratorPtr m_lightning_generator;
 };
 
 struct WipeTowerData
@@ -428,6 +434,7 @@ struct WipeTowerData
     // Depth of the wipe tower to pass to GLCanvas3D for exact bounding box:
     float                                                 depth;
     float                                                 brim_width;
+    float                                                 height;
 
     void clear() {
         priming.reset(nullptr);
@@ -559,6 +566,11 @@ public:
     SpanOfConstPtrs<PrintObject> objects() const { return SpanOfConstPtrs<PrintObject>(const_cast<const PrintObject* const* const>(m_objects.data()), m_objects.size()); }
     PrintObject*                get_object(size_t idx) { return const_cast<PrintObject*>(m_objects[idx]); }
     const PrintObject*          get_object(size_t idx) const { return m_objects[idx]; }
+    const PrintObject* get_print_object_by_model_object_id(ObjectID object_id) const {
+        auto it = std::find_if(m_objects.begin(), m_objects.end(),
+                               [object_id](const PrintObject* obj) { return obj->model_object()->id() == object_id; });
+        return (it == m_objects.end()) ? nullptr : *it;
+    }
     // PrintObject by its ObjectID, to be used to uniquely bind slicing warnings to their source PrintObjects
     // in the notification center.
     const PrintObject*          get_object(ObjectID object_id) const { 

src/libslic3r/PrintBase.cpp

@@ -6,10 +6,6 @@
 
 #include "I18N.hpp"
 
-//! macro used to mark string used at localization, 
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
-
 namespace Slic3r
 {
 
@@ -81,7 +77,7 @@ std::string PrintBase::output_filename(const std::string &format, const std::str
             filename = boost::filesystem::change_extension(filename, default_ext);
         return filename.string();
     } catch (std::runtime_error &err) {
-        throw Slic3r::PlaceholderParserError(L("Failed processing of the output_filename_format template.") + "\n" + err.what());
+        throw Slic3r::PlaceholderParserError(_u8L("Failed processing of the output_filename_format template.") + "\n" + err.what());
     }
 }
 

src/libslic3r/PrintConfig.cpp

@@ -16,11 +16,6 @@
 
 namespace Slic3r {
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) (s)
-#define _(s) Slic3r::I18N::translate(s)
-
 static t_config_enum_names enum_names_from_keys_map(const t_config_enum_values &enum_keys_map)
 {
     t_config_enum_names names;
@@ -53,6 +48,7 @@ static const t_config_enum_values s_keys_map_GCodeFlavor {
     { "makerware",      gcfMakerWare },
     { "marlin",         gcfMarlinLegacy },
     { "marlin2",        gcfMarlinFirmware },
+    { "klipper",        gcfKlipper },
     { "sailfish",       gcfSailfish },
     { "smoothie",       gcfSmoothie },
     { "mach3",          gcfMach3 },
@@ -72,6 +68,7 @@ static const t_config_enum_values s_keys_map_PrintHostType {
     { "prusalink",      htPrusaLink },
     { "prusaconnect",   htPrusaConnect },
     { "octoprint",      htOctoPrint },
+    { "mainsail",       htMainSail },
     { "duet",           htDuet },
     { "flashair",       htFlashAir },
     { "astrobox",       htAstroBox },
@@ -404,6 +401,7 @@ void PrintConfigDef::init_fff_params()
     const int max_temp = 1500;
     def = this->add("avoid_crossing_curled_overhangs", coBool);
     def->label = L("Avoid crossing curled overhangs (Experimental)");
+    // TRN PrintSettings: "Avoid crossing curled overhangs (Experimental)"
     def->tooltip = L("Plan travel moves such that the extruder avoids areas where the filament may be curled up. "
                    "This is mostly happening on steeper rounded overhangs and may cause a crash with the nozzle. "
                    "This feature slows down both the print and the G-code generation.");
@@ -461,8 +459,8 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionString(""));
 
     def = this->add("bottom_solid_layers", coInt);
-    //TRN To be shown in Print Settings "Bottom solid layers"
+    //TRN Print Settings: "Bottom solid layers"
-    def->label = L("Bottom");
+    def->label = L_CONTEXT("Bottom", "Layers");
     def->category = L("Layers and Perimeters");
     def->tooltip = L("Number of solid layers to generate on bottom surfaces.");
     def->full_label = L("Bottom solid layers");
@@ -470,8 +468,7 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionInt(3));
 
     def = this->add("bottom_solid_min_thickness", coFloat);
-    //TRN To be shown in Print Settings "Top solid layers"
+    def->label = L_CONTEXT("Bottom", "Layers");
-    def->label = L("Bottom");
     def->category = L("Layers and Perimeters");
     def->tooltip = L("The number of bottom solid layers is increased above bottom_solid_layers if necessary to satisfy "
     				 "minimum thickness of bottom shell.");
@@ -538,6 +535,7 @@ void PrintConfigDef::init_fff_params()
     def->mode       = comExpert;
     def->set_default_value(new ConfigOptionBool(false));
 
+    // TRN PrintSettings : "Dynamic overhang speed"
     auto overhang_speed_setting_description = L("Overhang size is expressed as a percentage of overlap of the extrusion with the previous layer: "
                         "100% would be full overlap (no overhang), while 0% represents full overhang (floating extrusion, bridge). "
                         "Speeds for overhang sizes in between are calculated via linear interpolation. "
@@ -585,10 +583,11 @@ void PrintConfigDef::init_fff_params()
     def->mode    = comExpert;
     def->set_default_value(new ConfigOptionBools{false});
 
+    // TRN FilamentSettings : "Dynamic fan speeds"
     auto fan_speed_setting_description = L(
         "Overhang size is expressed as a percentage of overlap of the extrusion with the previous layer: "
         "100% would be full overlap (no overhang), while 0% represents full overhang (floating extrusion, bridge). "
-        "Fan speeds for overhang sizes in between are calculated via linear interpolation. ");
+        "Fan speeds for overhang sizes in between are calculated via linear interpolation.");
 
     def           = this->add("overhang_fan_speed_0", coInts);
     def->label    = L("speed for 0% overlap (bridge)");
@@ -1409,6 +1408,7 @@ void PrintConfigDef::init_fff_params()
         { "makerware",      "MakerWare (MakerBot)" },
         { "marlin",         "Marlin (legacy)" },
         { "marlin2",        "Marlin 2" },
+        { "klipper",        "Klipper" },
         { "sailfish",       "Sailfish (MakerBot)" },
         { "mach3",          "Mach3/LinuxCNC" },
         { "machinekit",     "Machinekit" },
@@ -1467,6 +1467,14 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionFloat(0));
 
+    def = this->add("travel_acceleration", coFloat);
+    def->label = L("Travel");
+    def->tooltip = L("This is the acceleration your printer will use for travel moves. Set zero to disable "
+                     "acceleration control for travel.");
+    def->sidetext = L("mm/s²");
+    def->min = 0;
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionFloat(0));
 
     def = this->add("infill_every_layers", coInt);
     def->label = L("Combine infill every");
@@ -1552,14 +1560,14 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionBool(false));
 
-    def = this->add("infill_only_where_needed", coBool);
+    // def = this->add("infill_only_where_needed", coBool);
-    def->label = L("Only infill where needed");
+    // def->label = L("Only infill where needed");
-    def->category = L("Infill");
+    // def->category = L("Infill");
-    def->tooltip = L("This option will limit infill to the areas actually needed for supporting ceilings "
+    // def->tooltip = L("This option will limit infill to the areas actually needed for supporting ceilings "
-                   "(it will act as internal support material). If enabled, slows down the G-code generation "
+    //                "(it will act as internal support material). If enabled, slows down the G-code generation "
-                   "due to the multiple checks involved.");
+    //                "due to the multiple checks involved.");
-    def->mode = comAdvanced;
+    // def->mode = comAdvanced;
-    def->set_default_value(new ConfigOptionBool(false));
+    // def->set_default_value(new ConfigOptionBool(false));
 
     def = this->add("infill_overlap", coFloatOrPercent);
     def->label = L("Infill/perimeters overlap");
@@ -1795,9 +1803,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("machine_max_acceleration_extruding", coFloats);
     def->full_label = L("Maximum acceleration when extruding");
     def->category = L("Machine limits");
-    def->tooltip = L("Maximum acceleration when extruding (M204 P)\n\n"
+    def->tooltip = L("Maximum acceleration when extruding");
-                     "Marlin (legacy) firmware flavor will use this also "
-                     "as travel acceleration (M204 T).");
     def->sidetext = L("mm/s²");
     def->min = 0;
     def->mode = comAdvanced;
@@ -1808,7 +1814,8 @@ void PrintConfigDef::init_fff_params()
     def = this->add("machine_max_acceleration_retracting", coFloats);
     def->full_label = L("Maximum acceleration when retracting");
     def->category = L("Machine limits");
-    def->tooltip = L("Maximum acceleration when retracting (M204 R)");
+    def->tooltip = L("Maximum acceleration when retracting.\n\n"
+                     "Not used for RepRapFirmware, which does not support it.");
     def->sidetext = L("mm/s²");
     def->min = 0;
     def->mode = comAdvanced;
@@ -1818,7 +1825,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("machine_max_acceleration_travel", coFloats);
     def->full_label = L("Maximum acceleration for travel moves");
     def->category = L("Machine limits");
-    def->tooltip = L("Maximum acceleration for travel moves (M204 T)");
+    def->tooltip = L("Maximum acceleration for travel moves.");
     def->sidetext = L("mm/s²");
     def->min = 0;
     def->mode = comAdvanced;
@@ -1947,6 +1954,7 @@ void PrintConfigDef::init_fff_params()
         { "prusalink",      "PrusaLink" },
         { "prusaconnect",   "PrusaConnect" },
         { "octoprint",      "OctoPrint" },
+        { "mainsail",       "Mainsail/Fluidd" },
         { "duet",           "Duet" },
         { "flashair",       "FlashAir" },
         { "astrobox",       "AstroBox" },
@@ -1966,7 +1974,8 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("ooze_prevention", coBool);
     def->label = L("Enable");
-    def->tooltip = L("This option will drop the temperature of the inactive extruders to prevent oozing. ");
+    // TRN PrintSettings: Enable ooze prevention
+    def->tooltip = L("This option will drop the temperature of the inactive extruders to prevent oozing.");
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionBool(false));
 
@@ -2304,6 +2313,7 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("staggered_inner_seams", coBool);
     def->label = L("Staggered inner seams");
+    // TRN PrintSettings: "Staggered inner seams"
     def->tooltip = L("This option causes the inner seams to be shifted backwards based on their depth, forming a zigzag pattern.");
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionBool(false));
@@ -2469,6 +2479,7 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("standby_temperature_delta", coInt);
     def->label = L("Temperature variation");
+    // TRN PrintSettings : "Ooze prevention" > "Temperature variation"
     def->tooltip = L("Temperature difference to be applied when an extruder is not active. "
                      "The value is not used when 'idle_temperature' in filament settings "
                      "is defined.");
@@ -2478,15 +2489,25 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionInt(-5));
 
-    def = this->add("start_gcode", coString);
+    def = this->add("autoemit_temperature_commands", coBool);
-    def->label = L("Start G-code");
+    def->label = L("Emit temperature commands automatically");
-    def->tooltip = L("This start procedure is inserted at the beginning, after bed has reached "
+    def->tooltip = L("When enabled, PrusaSlicer will check whether your Custom Start G-Code contains M104 or M190. "
-                   "the target temperature and extruder just started heating, and before extruder "
+                     "If so, the temperatures will not be emitted automatically so you're free to customize "
-                   "has finished heating. If PrusaSlicer detects M104 or M190 in your custom codes, "
-                   "such commands will not be prepended automatically so you're free to customize "
                      "the order of heating commands and other custom actions. Note that you can use "
                      "placeholder variables for all PrusaSlicer settings, so you can put "
-                   "a \"M109 S[first_layer_temperature]\" command wherever you want.");
+                     "a \"M109 S[first_layer_temperature]\" command wherever you want.\n"
+                     "If your Custom Start G-Code does NOT contain M104 or M190, "
+                     "PrusaSlicer will execute the Start G-Code after bed reached its target temperature "
+                     "and extruder just started heating.\n\n"
+                     "When disabled, PrusaSlicer will NOT emit commands to heat up extruder and bed, "
+                     "leaving both to Custom Start G-Code.");
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionBool(true));
+
+    def = this->add("start_gcode", coString);
+    def->label = L("Start G-code");
+    def->tooltip = L("This start procedure is inserted at the beginning, possibly prepended by "
+                     "temperature-changing commands. See 'autoemit_temperature_commands'.");
     def->multiline = true;
     def->full_width = true;
     def->height = 12;
@@ -2646,8 +2667,8 @@ void PrintConfigDef::init_fff_params()
                    "If set to zero, support_material_contact_distance will be used for both top and bottom contact Z distances.");
     def->sidetext = L("mm");
 //    def->min = 0;
-    //TRN To be shown in Print Settings "Bottom contact Z distance". Have to be as short as possible
     def->set_enum_values(ConfigOptionDef::GUIType::f_enum_open, {
+    //TRN Print Settings: "Bottom contact Z distance". Have to be as short as possible
         { "0",      L("Same as top") },
         { "0.1",    "0.1" },
         { "0.2",    "0.2" }
@@ -2705,7 +2726,7 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionInt(1));
 
-    auto support_material_interface_layers = def = this->add("support_material_interface_layers", coInt);
+    def = this->add("support_material_interface_layers", coInt);
     def->label = L("Top interface layers");
     def->category = L("Support material");
     def->tooltip = L("Number of interface layers to insert between the object(s) and support material.");
@@ -2727,8 +2748,8 @@ void PrintConfigDef::init_fff_params()
                      "Set to -1 to use support_material_interface_layers");
     def->sidetext = L("layers");
     def->min = -1;
-    //TRN To be shown in Print Settings "Bottom interface layers". Have to be as short as possible
     def->set_enum_values(ConfigOptionDef::GUIType::i_enum_open, {
+    //TRN Print Settings: "Bottom interface layers". Have to be as short as possible
         { "-1", L("Same as top") },
         { "0", L("0 (off)") },
         { "1", L("1 (light)") },
@@ -2829,6 +2850,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_material_synchronize_layers", coBool);
     def->label = L("Synchronize with object layers");
     def->category = L("Support material");
+    // TRN PrintSettings : "Synchronize with object layers"
     def->tooltip = L("Synchronize support layers with the object print layers. This is useful "
                    "with multi-material printers, where the extruder switch is expensive. "
                    "This option is only available when top contact Z distance is set to zero.");
@@ -2860,6 +2882,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_tree_angle", coFloat);
     def->label = L("Maximum Branch Angle");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Maximum Branch Angle"
     def->tooltip = L("The maximum angle of the branches, when the branches have to avoid the model. "
                      "Use a lower angle to make them more vertical and more stable. Use a higher angle to be able to have more reach.");
     def->sidetext = L("°");
@@ -2871,6 +2894,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_tree_angle_slow", coFloat);
     def->label = L("Preferred Branch Angle");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Preferred Branch Angle"
     def->tooltip = L("The preferred angle of the branches, when they do not have to avoid the model. "
                      "Use a lower angle to make them more vertical and more stable. Use a higher angle for branches to merge faster.");
     def->sidetext = L("°");
@@ -2882,6 +2906,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_tree_tip_diameter", coFloat);
     def->label = L("Tip Diameter");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Tip Diameter"
     def->tooltip = L("The diameter of the top of the tip of the branches of organic support.");
     def->sidetext = L("mm");
     def->min = 0;
@@ -2891,6 +2916,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_tree_branch_diameter", coFloat);
     def->label = L("Branch Diameter");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Branch Diameter"
     def->tooltip = L("The diameter of the thinnest branches of organic support. Thicker branches are more sturdy. "
                      "Branches towards the base will be thicker than this.");
     def->sidetext = L("mm");
@@ -2899,8 +2925,10 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionFloat(2));
 
     def = this->add("support_tree_branch_diameter_angle", coFloat);
+    // TRN PrintSettings: #lmFIXME 
     def->label = L("Branch Diameter Angle");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Branch Diameter Angle"
     def->tooltip = L("The angle of the branches' diameter as they gradually become thicker towards the bottom. "
                      "An angle of 0 will cause the branches to have uniform thickness over their length. "
                      "A bit of an angle can increase stability of the organic support.");
@@ -2914,8 +2942,10 @@ void PrintConfigDef::init_fff_params()
     // How far apart the branches need to be when they touch the model. Making this distance small will cause 
     // the tree support to touch the model at more points, causing better overhang but making support harder to remove.
     def = this->add("support_tree_branch_distance", coFloat);
+    // TRN PrintSettings: #lmFIXME 
     def->label = L("Branch Distance");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Branch Distance"
     def->tooltip = L("How far apart the branches need to be when they touch the model. "
                      "Making this distance small will cause the tree support to touch the model at more points, "
                      "causing better overhang but making support harder to remove.");
@@ -2925,6 +2955,7 @@ void PrintConfigDef::init_fff_params()
     def = this->add("support_tree_top_rate", coPercent);
     def->label = L("Branch Density");
     def->category = L("Support material");
+    // TRN PrintSettings: "Organic supports" > "Branch Density"
     def->tooltip = L("Adjusts the density of the support structure used to generate the tips of the branches. "
                      "A higher value results in better overhangs but the supports are harder to remove, "
                      "thus it is recommended to enable top support interfaces instead of a high branch density value "
@@ -3013,8 +3044,8 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionFloatOrPercent(15, false));
 
     def = this->add("top_solid_layers", coInt);
-    //TRN To be shown in Print Settings "Top solid layers"
+    //TRN Print Settings: "Top solid layers"
-    def->label = L("Top");
+    def->label = L_CONTEXT("Top", "Layers");
     def->category = L("Layers and Perimeters");
     def->tooltip = L("Number of solid layers to generate on top surfaces.");
     def->full_label = L("Top solid layers");
@@ -3022,8 +3053,7 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionInt(3));
 
     def = this->add("top_solid_min_thickness", coFloat);
-    //TRN To be shown in Print Settings "Top solid layers"
+    def->label = L_CONTEXT("Top", "Layers");
-    def->label = L("Top");
     def->category = L("Layers and Perimeters");
     def->tooltip = L("The number of top solid layers is increased above top_solid_layers if necessary to satisfy "
     				 "minimum thickness of top shell."
@@ -3150,6 +3180,25 @@ void PrintConfigDef::init_fff_params()
     def->min = 0.;
     def->set_default_value(new ConfigOptionFloat(2.));
 
+    def = this->add("wipe_tower_cone_angle", coFloat);
+    def->label = L("Stabilization cone apex angle");
+    def->tooltip = L("Angle at the apex of the cone that is used to stabilize the wipe tower. "
+                     "Larger angle means wider base.");
+    def->sidetext = L("°");
+    def->mode = comAdvanced;
+    def->min = 0.;
+    def->max = 90.;
+    def->set_default_value(new ConfigOptionFloat(0.));
+
+    def = this->add("wipe_tower_extra_spacing", coPercent);
+    def->label = L("Wipe tower purge lines spacing");
+    def->tooltip = L("Spacing of purge lines on the wipe tower.");
+    def->sidetext = L("%");
+    def->mode = comExpert;
+    def->min = 100.;
+    def->max = 300.;
+    def->set_default_value(new ConfigOptionPercent(100.));
+
     def = this->add("wipe_into_infill", coBool);
     def->category = L("Wipe options");
     def->label = L("Wipe into this object's infill");
@@ -3860,7 +3909,9 @@ void PrintConfigDef::init_sla_params()
     def->tooltip = L("Support tree building strategy");
     def->set_enum<sla::SupportTreeType>(
         ConfigOptionEnum<sla::SupportTreeType>::get_enum_names(),
-        { L("Default"), L("Branching (experimental)") });
+        { L("Default"),
+    // TRN One of the "Support tree type"s on SLAPrintSettings : Supports
+            L("Branching (experimental)") });
     // TODO: def->enum_def->labels[2] = L("Organic");
     def->mode = comSimple;
     def->set_default_value(new ConfigOptionEnum(sla::SupportTreeType::Default));
@@ -4103,6 +4154,8 @@ static std::set<std::string> PrintConfigDef_ignore = {
     "wall_add_middle_threshold", "wall_split_middle_threshold",
     // Replaced by new concentric ensuring in 2.6.0-alpha5
     "ensure_vertical_shell_thickness",
+    // Disabled in 2.6.0-alpha6, this option is problematic
+    "infill_only_where_needed",
 };
 
 void PrintConfigDef::handle_legacy(t_config_option_key &opt_key, std::string &value)
@@ -4383,8 +4436,9 @@ std::string validate(const FullPrintConfig &cfg)
         cfg.gcode_flavor.value != gcfMarlinLegacy &&
         cfg.gcode_flavor.value != gcfMarlinFirmware &&
         cfg.gcode_flavor.value != gcfMachinekit &&
-        cfg.gcode_flavor.value != gcfRepetier)
+        cfg.gcode_flavor.value != gcfRepetier &&
-        return "--use-firmware-retraction is only supported by Marlin, Smoothie, RepRapFirmware, Repetier and Machinekit firmware";
+        cfg.gcode_flavor.value != gcfKlipper)
+        return "--use-firmware-retraction is only supported by Marlin, Klipper, Smoothie, RepRapFirmware, Repetier and Machinekit firmware";
 
     if (cfg.use_firmware_retraction.value)
         for (unsigned char wipe : cfg.wipe.values)
@@ -4500,12 +4554,19 @@ std::string validate(const FullPrintConfig &cfg)
         }
         case coFloats:
         case coPercents:
-            for (double v : static_cast<const ConfigOptionVector<double>*>(opt)->values)
+        {
+            const auto* vec = static_cast<const ConfigOptionVector<double>*>(opt);
+            for (size_t i = 0; i < vec->size(); ++i) {
+                if (vec->is_nil(i))
+                    continue;
+                double v = vec->values[i];
                 if (v < optdef->min || v > optdef->max) {
                     out_of_range = true;
                     break;
                 }
+            }
             break;
+        }
         case coInt:
         {
             auto *iopt = static_cast<const ConfigOptionInt*>(opt);
@@ -4513,12 +4574,19 @@ std::string validate(const FullPrintConfig &cfg)
             break;
         }
         case coInts:
-            for (int v : static_cast<const ConfigOptionVector<int>*>(opt)->values)
+        {
+            const auto* vec = static_cast<const ConfigOptionVector<int>*>(opt);
+            for (size_t i = 0; i < vec->size(); ++i) {
+                if (vec->is_nil(i))
+                    continue;
+                int v = vec->values[i];
                 if (v < optdef->min || v > optdef->max) {
                     out_of_range = true;
                     break;
                 }
+            }
             break;
+        }
         default:;
         }
         if (out_of_range)

src/libslic3r/PrintConfig.hpp

@@ -32,7 +32,7 @@
 namespace Slic3r {
 
 enum GCodeFlavor : unsigned char {
-    gcfRepRapSprinter, gcfRepRapFirmware, gcfRepetier, gcfTeacup, gcfMakerWare, gcfMarlinLegacy, gcfMarlinFirmware, gcfSailfish, gcfMach3, gcfMachinekit,
+    gcfRepRapSprinter, gcfRepRapFirmware, gcfRepetier, gcfTeacup, gcfMakerWare, gcfMarlinLegacy, gcfMarlinFirmware, gcfKlipper, gcfSailfish, gcfMach3, gcfMachinekit,
     gcfSmoothie, gcfNoExtrusion,
 };
 
@@ -44,7 +44,7 @@ enum class MachineLimitsUsage {
 };
 
 enum PrintHostType {
-    htPrusaLink, htPrusaConnect, htOctoPrint, htDuet, htFlashAir, htAstroBox, htRepetier, htMKS
+    htPrusaLink, htPrusaConnect, htOctoPrint, htDuet, htFlashAir, htAstroBox, htRepetier, htMKS, htMainSail
 };
 
 enum AuthorizationType {
@@ -495,7 +495,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionFloatOrPercent,      extrusion_width))
     ((ConfigOptionFloat,               first_layer_acceleration_over_raft))
     ((ConfigOptionFloatOrPercent,      first_layer_speed_over_raft))
-    ((ConfigOptionBool,                infill_only_where_needed))
+    // ((ConfigOptionBool,                infill_only_where_needed))
     // Force the generation of solid shells between adjacent materials/volumes.
     ((ConfigOptionBool,                interface_shells))
     ((ConfigOptionFloat,               layer_height))
@@ -661,6 +661,7 @@ PRINT_CONFIG_CLASS_DEFINE(
 PRINT_CONFIG_CLASS_DEFINE(
     GCodeConfig,
 
+    ((ConfigOptionBool,                autoemit_temperature_commands))
     ((ConfigOptionString,              before_layer_gcode))
     ((ConfigOptionString,              between_objects_gcode))
     ((ConfigOptionFloats,              deretract_speed))
@@ -815,6 +816,7 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionPoints,             thumbnails))
     ((ConfigOptionEnum<GCodeThumbnailsFormat>,  thumbnails_format))
     ((ConfigOptionFloat,              top_solid_infill_acceleration))
+    ((ConfigOptionFloat,              travel_acceleration))
     ((ConfigOptionBools,              wipe))
     ((ConfigOptionBool,               wipe_tower))
     ((ConfigOptionFloat,              wipe_tower_x))
@@ -823,6 +825,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionFloat,              wipe_tower_per_color_wipe))
     ((ConfigOptionFloat,              wipe_tower_rotation_angle))
     ((ConfigOptionFloat,              wipe_tower_brim_width))
+    ((ConfigOptionFloat,              wipe_tower_cone_angle))
+    ((ConfigOptionPercent,            wipe_tower_extra_spacing))
     ((ConfigOptionFloat,              wipe_tower_bridging))
     ((ConfigOptionFloats,             wiping_volumes_matrix))
     ((ConfigOptionFloats,             wiping_volumes_extruders))

src/libslic3r/PrintObjectSlice.cpp

@@ -10,8 +10,6 @@
 
 #include <tbb/parallel_for.h>
 
-//! macro used to mark string used at localization, return same string
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r {
 
@@ -499,7 +497,7 @@ void PrintObject::slice()
 {
     if (! this->set_started(posSlice))
         return;
-    m_print->set_status(10, L("Processing triangulated mesh"));
+    m_print->set_status(10, _u8L("Processing triangulated mesh"));
     std::vector<coordf_t> layer_height_profile;
     this->update_layer_height_profile(*this->model_object(), m_slicing_params, layer_height_profile);
     m_print->throw_if_canceled();
@@ -733,9 +731,9 @@ void PrintObject::slice_volumes()
         if (m_config.xy_size_compensation.value != 0.f) {
             this->active_step_add_warning(
                 PrintStateBase::WarningLevel::CRITICAL,
-                L("An object has enabled XY Size compensation which will not be used because it is also multi-material painted.\nXY Size "
+                _u8L("An object has enabled XY Size compensation which will not be used because it is also multi-material painted.\nXY Size "
                   "compensation cannot be combined with multi-material painting.") +
-                    "\n" + (L("Object name")) + ": " + this->model_object()->name);
+                    "\n" + (_u8L("Object name")) + ": " + this->model_object()->name);
         }
 
         BOOST_LOG_TRIVIAL(debug) << "Slicing volumes - MMU segmentation";

src/libslic3r/SLA/Hollowing.cpp

@@ -23,10 +23,6 @@
 #include <libslic3r/MTUtils.hpp>
 #include <libslic3r/I18N.hpp>
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
-
 namespace Slic3r {
 namespace sla {
 
@@ -83,12 +79,12 @@ InteriorPtr generate_interior(const VoxelGrid       &vgrid,
     auto   narrowb  = 1.f;  // voxel units (voxel count)
 
     if (ctl.stopcondition()) return {};
-    else ctl.statuscb(0, L("Hollowing"));
+    else ctl.statuscb(0, _u8L("Hollowing"));
 
     auto gridptr = dilate_grid(vgrid, out_range, in_range);
 
     if (ctl.stopcondition()) return {};
-    else ctl.statuscb(30, L("Hollowing"));
+    else ctl.statuscb(30, _u8L("Hollowing"));
 
     double iso_surface = D;
     if (D > EPSILON) {
@@ -103,7 +99,7 @@ InteriorPtr generate_interior(const VoxelGrid       &vgrid,
     }
 
     if (ctl.stopcondition()) return {};
-    else ctl.statuscb(70, L("Hollowing"));
+    else ctl.statuscb(70, _u8L("Hollowing"));
 
     double adaptivity = 0.;
     InteriorPtr interior = InteriorPtr{new Interior{}};
@@ -112,7 +108,7 @@ InteriorPtr generate_interior(const VoxelGrid       &vgrid,
     interior->gridptr = std::move(gridptr);
 
     if (ctl.stopcondition()) return {};
-    else ctl.statuscb(100, L("Hollowing"));
+    else ctl.statuscb(100, _u8L("Hollowing"));
 
     interior->iso_surface = iso_surface;
     interior->thickness   = offset;

src/libslic3r/SLA/Pad.cpp

@@ -21,9 +21,6 @@
 #include "I18N.hpp"
 #include <boost/log/trivial.hpp>
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r { namespace sla {
 
@@ -530,7 +527,7 @@ std::string PadConfig::validate() const
     if (brim_size_mm < MIN_BRIM_SIZE_MM ||
         bottom_offset() > brim_size_mm + wing_distance() ||
         get_waffle_offset(*this) <= MIN_BRIM_SIZE_MM)
-        return L("Pad brim size is too small for the current configuration.");
+        return _u8L("Pad brim size is too small for the current configuration.");
 
     return "";
 }

src/libslic3r/SLA/SupportTree.cpp

@@ -16,13 +16,9 @@
 #include <libslic3r/TriangleMeshSlicer.hpp>
 
 #include <boost/log/trivial.hpp>
-#include <libslic3r/I18N.hpp>
 
 #include <libnest2d/tools/benchmark.h>
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r { namespace sla {
 

src/libslic3r/SLAPrint.cpp

@@ -2,6 +2,7 @@
 #include "SLAPrintSteps.hpp"
 #include "CSGMesh/CSGMeshCopy.hpp"
 #include "CSGMesh/PerformCSGMeshBooleans.hpp"
+#include "format.hpp"
 
 #include "Geometry.hpp"
 #include "Thread.hpp"
@@ -23,7 +24,7 @@
 
 //! macro used to mark string used at localization,
 //! return same string
-#define L(s) Slic3r::I18N::translate(s)
+#define _u8L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r {
 
@@ -543,7 +544,7 @@ std::string SLAPrint::validate(std::string*) const
         if(supports_en &&
            mo->sla_points_status == sla::PointsStatus::UserModified &&
            mo->sla_support_points.empty())
-            return L("Cannot proceed without support points! "
+            return _u8L("Cannot proceed without support points! "
                      "Add support points or disable support generation.");
 
         sla::SupportTreeConfig cfg = make_support_cfg(po->config());
@@ -554,13 +555,13 @@ std::string SLAPrint::validate(std::string*) const
         sla::PadConfig::EmbedObject &builtinpad = padcfg.embed_object;
         
         if(supports_en && !builtinpad.enabled && elv < cfg.head_fullwidth())
-            return L(
+            return _u8L(
                 "Elevation is too low for object. Use the \"Pad around "
                 "object\" feature to print the object without elevation.");
         
         if(supports_en && builtinpad.enabled &&
            cfg.pillar_base_safety_distance_mm < builtinpad.object_gap_mm) {
-            return L(
+            return _u8L(
                 "The endings of the support pillars will be deployed on the "
                 "gap between the object and the pad. 'Support base safety "
                 "distance' has to be greater than the 'Pad object gap' "
@@ -576,18 +577,27 @@ std::string SLAPrint::validate(std::string*) const
     double expt_cur = m_material_config.exposure_time.getFloat();
 
     if (expt_cur < expt_min || expt_cur > expt_max)
-        return L("Exposition time is out of printer profile bounds.");
+        return _u8L("Exposition time is out of printer profile bounds.");
 
     double iexpt_max = m_printer_config.max_initial_exposure_time.getFloat();
     double iexpt_min = m_printer_config.min_initial_exposure_time.getFloat();
     double iexpt_cur = m_material_config.initial_exposure_time.getFloat();
 
     if (iexpt_cur < iexpt_min || iexpt_cur > iexpt_max)
-        return L("Initial exposition time is out of printer profile bounds.");
+        return _u8L("Initial exposition time is out of printer profile bounds.");
 
     return "";
 }
 
+void SLAPrint::export_print(const std::string &fname, const ThumbnailsList &thumbnails, const std::string &projectname)
+{
+    if (m_archiver)
+        m_archiver->export_print(fname, *this, thumbnails, projectname);
+    else {
+        throw ExportError(format(_u8L("Unknown archive format: %s"), m_printer_config.sla_archive_format.value));
+    }
+}
+
 bool SLAPrint::invalidate_step(SLAPrintStep step)
 {
     bool invalidated = Inherited::invalidate_step(step);
@@ -690,7 +700,7 @@ void SLAPrint::process()
     }
 
     // If everything vent well
-    m_report_status(*this, 100, L("Slicing done"));
+    m_report_status(*this, 100, _u8L("Slicing done"));
 
 #ifdef SLAPRINT_DO_BENCHMARK
     std::string csvbenchstr;

src/libslic3r/SLAPrint.hpp

@@ -546,10 +546,7 @@ public:
 
     void export_print(const std::string    &fname,
                       const ThumbnailsList &thumbnails,
-                      const std::string    &projectname = "")
+                      const std::string    &projectname = "");
-    {
-        m_archiver->export_print(fname, *this, thumbnails, projectname);
-    }
     
 private:
     

src/libslic3r/SLAPrintSteps.cpp

@@ -32,9 +32,6 @@
 
 #include <libnest2d/tools/benchmark.h>
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r {
 
@@ -54,14 +51,15 @@ const std::array<unsigned, slaposCount> OBJ_STEP_LEVELS = {
 std::string OBJ_STEP_LABELS(size_t idx)
 {
     switch (idx) {
-    case slaposAssembly:             return L("Assembling model from parts");
+                                            // TRN Status of the SLA print calculation
-    case slaposHollowing:            return L("Hollowing model");
+    case slaposAssembly:             return _u8L("Assembling model from parts");
-    case slaposDrillHoles:           return L("Drilling holes into model.");
+    case slaposHollowing:            return _u8L("Hollowing model");
-    case slaposObjectSlice:          return L("Slicing model");
+    case slaposDrillHoles:           return _u8L("Drilling holes into model.");
-    case slaposSupportPoints:        return L("Generating support points");
+    case slaposObjectSlice:          return _u8L("Slicing model");
-    case slaposSupportTree:          return L("Generating support tree");
+    case slaposSupportPoints:        return _u8L("Generating support points");
-    case slaposPad:                  return L("Generating pad");
+    case slaposSupportTree:          return _u8L("Generating support tree");
-    case slaposSliceSupports:        return L("Slicing supports");
+    case slaposPad:                  return _u8L("Generating pad");
+    case slaposSliceSupports:        return _u8L("Slicing supports");
     default:;
     }
     assert(false);
@@ -76,8 +74,8 @@ const std::array<unsigned, slapsCount> PRINT_STEP_LEVELS = {
 std::string PRINT_STEP_LABELS(size_t idx)
 {
     switch (idx) {
-    case slapsMergeSlicesAndEval:   return L("Merging slices and calculating statistics");
+    case slapsMergeSlicesAndEval:   return _u8L("Merging slices and calculating statistics");
-    case slapsRasterize:            return L("Rasterizing layers");
+    case slapsRasterize:            return _u8L("Rasterizing layers");
     default:;
     }
     assert(false); return "Out of bounds!";
@@ -201,7 +199,13 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
         m = csgmesh_merge_positive_parts(r);
         handled = true;
     } else if (csg::check_csgmesh_booleans(r) == r.end()) {
-        auto cgalmeshptr = csg::perform_csgmesh_booleans(r);
+        MeshBoolean::cgal::CGALMeshPtr cgalmeshptr;
+        try {
+            cgalmeshptr = csg::perform_csgmesh_booleans(r);
+        } catch (...) {
+            // leaves cgalmeshptr as nullptr
+        }
+
         if (cgalmeshptr) {
             m = MeshBoolean::cgal::cgal_to_indexed_triangle_set(*cgalmeshptr);
             handled = true;
@@ -252,14 +256,14 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
                 if (ret & static_cast<int>(sla::HollowMeshResult::FaultyMesh)) {
                     po.active_step_add_warning(
                         PrintStateBase::WarningLevel::NON_CRITICAL,
-                        L("Mesh to be hollowed is not suitable for hollowing (does not "
+                        _u8L("Mesh to be hollowed is not suitable for hollowing (does not "
                           "bound a volume)."));
                 }
 
                 if (ret & static_cast<int>(sla::HollowMeshResult::FaultyHoles)) {
                     po.active_step_add_warning(
                         PrintStateBase::WarningLevel::NON_CRITICAL,
-                        L("Unable to drill the current configuration of holes into the "
+                        _u8L("Unable to drill the current configuration of holes into the "
                           "model."));
                 }
 
@@ -267,7 +271,7 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
 
                 if (ret & static_cast<int>(sla::HollowMeshResult::DrillingFailed)) {
                     po.active_step_add_warning(
-                        PrintStateBase::WarningLevel::NON_CRITICAL, L(
+                        PrintStateBase::WarningLevel::NON_CRITICAL, _u8L(
                         "Drilling holes into the mesh failed. "
                         "This is usually caused by broken model. Try to fix it first."));
 
@@ -276,7 +280,7 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
 
                 if (hole_fail) {
                     po.active_step_add_warning(PrintStateBase::WarningLevel::NON_CRITICAL,
-                                               L("Failed to drill some holes into the model"));
+                                               _u8L("Failed to drill some holes into the model"));
 
                     handled = false;
                 }
@@ -286,7 +290,7 @@ void SLAPrint::Steps::generate_preview(SLAPrintObject &po, SLAPrintObjectStep st
 
     if (!handled) { // Last resort to voxelization.
         po.active_step_add_warning(PrintStateBase::WarningLevel::NON_CRITICAL,
-                                   L("Can't perform full mesh booleans! "
+                                   _u8L("Can't perform full mesh booleans! "
                                      "Some parts of the print will be previewed with approximated meshes. "
                                      "This does not affect the quality of slices or the physical print in any way."));
         m = generate_preview_vdb(po, step);
@@ -507,7 +511,7 @@ void SLAPrint::Steps::slice_model(SLAPrintObject &po)
     if(slindex_it == po.m_slice_index.end())
         //TRN To be shown at the status bar on SLA slicing error.
         throw Slic3r::RuntimeError(
-            L("Slicing had to be stopped due to an internal error: "
+            _u8L("Slicing had to be stopped due to an internal error: "
               "Inconsistent slice index."));
 
     po.m_model_height_levels.clear();
@@ -688,7 +692,7 @@ void SLAPrint::Steps::support_points(SLAPrintObject &po)
 
         // Using RELOAD_SLA_SUPPORT_POINTS to tell the Plater to pass
         // the update status to GLGizmoSlaSupports
-        report_status(-1, L("Generating support points"),
+        report_status(-1, _u8L("Generating support points"),
                       SlicingStatus::RELOAD_SLA_SUPPORT_POINTS);
     } else {
         // There are either some points on the front-end, or the user
@@ -737,7 +741,7 @@ void SLAPrint::Steps::support_tree(SLAPrintObject &po)
     auto rc = SlicingStatus::RELOAD_SCENE;
 
     // This is to prevent "Done." being displayed during merged_mesh()
-    report_status(-1, L("Visualizing supports"));
+    report_status(-1, _u8L("Visualizing supports"));
 
     BOOST_LOG_TRIVIAL(debug) << "Processed support point count "
                              << po.m_supportdata->input.pts.size();
@@ -746,7 +750,7 @@ void SLAPrint::Steps::support_tree(SLAPrintObject &po)
     if(po.support_mesh().empty())
         BOOST_LOG_TRIVIAL(warning) << "Support mesh is empty";
 
-    report_status(-1, L("Visualizing supports"), rc);
+    report_status(-1, _u8L("Visualizing supports"), rc);
 }
 
 void SLAPrint::Steps::generate_pad(SLAPrintObject &po) {
@@ -776,7 +780,7 @@ void SLAPrint::Steps::generate_pad(SLAPrintObject &po) {
 
         if (!validate_pad(po.m_supportdata->pad_mesh.its, pcfg))
             throw Slic3r::SlicingError(
-                    L("No pad can be generated for this model with the "
+                    _u8L("No pad can be generated for this model with the "
                       "current configuration"));
 
     } else if(po.m_supportdata) {
@@ -784,7 +788,7 @@ void SLAPrint::Steps::generate_pad(SLAPrintObject &po) {
     }
 
     throw_if_canceled();
-    report_status(-1, L("Visualizing supports"), SlicingStatus::RELOAD_SCENE);
+    report_status(-1, _u8L("Visualizing supports"), SlicingStatus::RELOAD_SCENE);
 }
 
 // Slicing the support geometries similarly to the model slicing procedure.
@@ -905,7 +909,7 @@ void SLAPrint::Steps::initialize_printer_input()
         for(const SliceRecord& slicerecord : o->get_slice_index()) {
             if (!slicerecord.is_valid())
                 throw Slic3r::SlicingError(
-                    L("There are unprintable objects. Try to "
+                    _u8L("There are unprintable objects. Try to "
                       "adjust support settings to make the "
                       "objects printable."));
 

src/libslic3r/TextConfiguration.hpp

@@ -50,9 +50,11 @@ struct FontProp
     // When not set value is zero and is not stored
     std::optional<float> distance; // [in mm]
         
-    // change up vector direction of font
+    // Angle of rotation around emboss direction (Z axis)
+    // It is calculate on the fly from volume world transformation
+    // only StyleManager keep actual value for comparision with style
     // When not set value is zero and is not stored
-    std::optional<float> angle; // [in radians]
+    std::optional<float> angle; // [in radians] form -Pi to Pi
 
     // Parameter for True Type Font collections
     // Select index of font in collection

src/libslic3r/TreeSupport.cpp

@@ -1451,7 +1451,7 @@ static void generate_initial_areas(
     // As a circle is round this length is identical for every axis as long as the 90 degrees angle between both remains.
     const coord_t circle_length_to_half_linewidth_change = config.min_radius < config.support_line_width ? 
         config.min_radius / 2 : 
-        sqrt(sqr(config.min_radius) - sqr(config.min_radius - config.support_line_width / 2));
+        scale_(sqrt(sqr(unscale<double>(config.min_radius)) - sqr(unscale<double>(config.min_radius - config.support_line_width / 2))));
     // Extra support offset to compensate for larger tip radiis. Also outset a bit more when z overwrites xy, because supporting something with a part of a support line is better than not supporting it at all.
     //FIXME Vojtech: This is not sufficient for support enforcers to work.
     //FIXME There is no account for the support overhang angle.

src/libslic3r/TriangleMeshSlicer.cpp

@@ -34,6 +34,10 @@
 
 // #define SLIC3R_DEBUG_SLICE_PROCESSING
 
+#ifdef SLIC3R_DEBUG_SLICE_PROCESSING
+    #define DEBUG_INTERSECTIONLINE
+#endif
+
 #if defined(SLIC3R_DEBUG) || defined(SLIC3R_DEBUG_SLICE_PROCESSING)
 #include "SVG.hpp"
 #endif
@@ -125,7 +129,7 @@ public:
     };
     uint32_t        flags { 0 };
 
-#if DEBUG_INTERSECTIONLINE
+#ifdef DEBUG_INTERSECTIONLINE
     enum class Source {
         BottomPlane,
         TopPlane,
@@ -1446,19 +1450,19 @@ static std::vector<Polygons> make_slab_loops(
                         for (const IntersectionLine &l : lines.at_slice[slice_below])
                             if (l.edge_type != IntersectionLine::FacetEdgeType::Top) {
                                 in.emplace_back(l);
-#if DEBUG_INTERSECTIONLINE
+#ifdef DEBUG_INTERSECTIONLINE
                                 in.back().source = IntersectionLine::Source::BottomPlane;
 #endif // DEBUG_INTERSECTIONLINE
                             }
                     }
                     {
                         // Edges in between slice_below and slice_above.
-#if DEBUG_INTERSECTIONLINE
+#ifdef DEBUG_INTERSECTIONLINE
                         size_t old_size = in.size();
 #endif // DEBUG_INTERSECTIONLINE
                         // Edge IDs of end points on in-between lines that touch the layer above are already increased with num_edges.
                         append(in, lines.between_slices[line_idx]);
-#if DEBUG_INTERSECTIONLINE
+#ifdef DEBUG_INTERSECTIONLINE
                         for (auto it = in.begin() + old_size; it != in.end(); ++ it) {
                             assert(it->edge_type == IntersectionLine::FacetEdgeType::Slab);
                             it->source = IntersectionLine::Source::Slab;
@@ -1476,7 +1480,7 @@ static std::vector<Polygons> make_slab_loops(
                                     l.edge_a_id += num_edges;
                                 if (l.edge_b_id >= 0)
                                     l.edge_b_id += num_edges;
-#if DEBUG_INTERSECTIONLINE
+#ifdef DEBUG_INTERSECTIONLINE
                                 l.source = IntersectionLine::Source::TopPlane;
 #endif // DEBUG_INTERSECTIONLINE
                             }

src/libslic3r/Zipper.cpp

@@ -6,10 +6,6 @@
 #include <boost/log/trivial.hpp>
 #include "I18N.hpp"
 
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
-
 #if defined(_MSC_VER) &&  _MSC_VER <= 1800 || __cplusplus < 201103L
     #define SLIC3R_NORETURN
 #elif __cplusplus >= 201103L
@@ -24,7 +20,7 @@ public:
 
     std::string formatted_errorstr() const
     {
-        return L("Error with zip archive") + " " + m_zipname + ": " +
+        return _u8L("Error with zip archive") + " " + m_zipname + ": " +
                get_errorstr();
     }
 

src/libslic3r/miniz_extension.cpp

@@ -6,11 +6,7 @@
 #include "boost/nowide/cstdio.hpp"
 #endif
 
-#include "I18N.hpp"
+#include "libslic3r/I18N.hpp"
-
-//! macro used to mark string used at localization,
-//! return same string
-#define L(s) Slic3r::I18N::translate(s)
 
 namespace Slic3r {
 
@@ -88,67 +84,67 @@ std::string MZ_Archive::get_errorstr(mz_zip_error mz_err)
     case MZ_ZIP_NO_ERROR:
         return "no error";
     case MZ_ZIP_UNDEFINED_ERROR:
-        return L("undefined error");
+        return _u8L("undefined error");
     case MZ_ZIP_TOO_MANY_FILES:
-        return L("too many files");
+        return _u8L("too many files");
     case MZ_ZIP_FILE_TOO_LARGE:
-        return L("file too large");
+        return _u8L("file too large");
     case MZ_ZIP_UNSUPPORTED_METHOD:
-        return L("unsupported method");
+        return _u8L("unsupported method");
     case MZ_ZIP_UNSUPPORTED_ENCRYPTION:
-        return L("unsupported encryption");
+        return _u8L("unsupported encryption");
     case MZ_ZIP_UNSUPPORTED_FEATURE:
-        return L("unsupported feature");
+        return _u8L("unsupported feature");
     case MZ_ZIP_FAILED_FINDING_CENTRAL_DIR:
-        return L("failed finding central directory");
+        return _u8L("failed finding central directory");
     case MZ_ZIP_NOT_AN_ARCHIVE:
-        return L("not a ZIP archive");
+        return _u8L("not a ZIP archive");
     case MZ_ZIP_INVALID_HEADER_OR_CORRUPTED:
-        return L("invalid header or archive is corrupted");
+        return _u8L("invalid header or archive is corrupted");
     case MZ_ZIP_UNSUPPORTED_MULTIDISK:
-        return L("unsupported multidisk archive");
+        return _u8L("unsupported multidisk archive");
     case MZ_ZIP_DECOMPRESSION_FAILED:
-        return L("decompression failed or archive is corrupted");
+        return _u8L("decompression failed or archive is corrupted");
     case MZ_ZIP_COMPRESSION_FAILED:
-        return L("compression failed");
+        return _u8L("compression failed");
     case MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE:
-        return L("unexpected decompressed size");
+        return _u8L("unexpected decompressed size");
     case MZ_ZIP_CRC_CHECK_FAILED:
-        return L("CRC-32 check failed");
+        return _u8L("CRC-32 check failed");
     case MZ_ZIP_UNSUPPORTED_CDIR_SIZE:
-        return L("unsupported central directory size");
+        return _u8L("unsupported central directory size");
     case MZ_ZIP_ALLOC_FAILED:
-        return L("allocation failed");
+        return _u8L("allocation failed");
     case MZ_ZIP_FILE_OPEN_FAILED:
-        return L("file open failed");
+        return _u8L("file open failed");
     case MZ_ZIP_FILE_CREATE_FAILED:
-        return L("file create failed");
+        return _u8L("file create failed");
     case MZ_ZIP_FILE_WRITE_FAILED:
-        return L("file write failed");
+        return _u8L("file write failed");
     case MZ_ZIP_FILE_READ_FAILED:
-        return L("file read failed");
+        return _u8L("file read failed");
     case MZ_ZIP_FILE_CLOSE_FAILED:
-        return L("file close failed");
+        return _u8L("file close failed");
     case MZ_ZIP_FILE_SEEK_FAILED:
-        return L("file seek failed");
+        return _u8L("file seek failed");
     case MZ_ZIP_FILE_STAT_FAILED:
-        return L("file stat failed");
+        return _u8L("file stat failed");
     case MZ_ZIP_INVALID_PARAMETER:
-        return L("invalid parameter");
+        return _u8L("invalid parameter");
     case MZ_ZIP_INVALID_FILENAME:
-        return L("invalid filename");
+        return _u8L("invalid filename");
     case MZ_ZIP_BUF_TOO_SMALL:
-        return L("buffer too small");
+        return _u8L("buffer too small");
     case MZ_ZIP_INTERNAL_ERROR:
-        return L("internal error");
+        return _u8L("internal error");
     case MZ_ZIP_FILE_NOT_FOUND:
-        return L("file not found");
+        return _u8L("file not found");
     case MZ_ZIP_ARCHIVE_TOO_LARGE:
-        return L("archive is too large");
+        return _u8L("archive is too large");
     case MZ_ZIP_VALIDATION_FAILED:
-        return L("validation failed");
+        return _u8L("validation failed");
     case MZ_ZIP_WRITE_CALLBACK_FAILED:
-        return L("write calledback failed");
+        return _u8L("write calledback failed");
     default:
         break;
     }

src/slic3r/CMakeLists.txt

@@ -97,6 +97,8 @@ set(SLIC3R_GUI_SOURCES
     GUI/GUI_Geometry.hpp
     GUI/I18N.cpp
     GUI/I18N.hpp
+    GUI/IconManager.cpp
+    GUI/IconManager.hpp
     GUI/MainFrame.cpp
     GUI/MainFrame.hpp
     GUI/Plater.cpp
@@ -157,6 +159,8 @@ set(SLIC3R_GUI_SOURCES
     GUI/RemovableDriveManager.hpp
     GUI/SendSystemInfoDialog.cpp
     GUI/SendSystemInfoDialog.hpp
+    GUI/SurfaceDrag.cpp
+    GUI/SurfaceDrag.hpp
     GUI/BonjourDialog.cpp
     GUI/BonjourDialog.hpp
     GUI/ButtonsDescription.cpp
@@ -340,3 +344,6 @@ if (UNIX AND NOT APPLE)
     target_include_directories(libslic3r_gui PRIVATE ${GTK${SLIC3R_GTK}_INCLUDE_DIRS})
     target_link_libraries(libslic3r_gui ${GTK${SLIC3R_GTK}_LIBRARIES} fontconfig)
 endif ()
+
+# Add a definition so that we can tell we are compiling slic3r.
+target_compile_definitions(libslic3r_gui PRIVATE SLIC3R_CURRENTLY_COMPILING_GUI_MODULE)

src/slic3r/GUI/3DBed.cpp

@@ -109,26 +109,23 @@ Point Bed3D::point_projection(const Point& point) const
     return m_polygon.point_projection(point);
 }
 
-void Bed3D::render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_axes, bool show_texture)
+void Bed3D::render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_texture)
 {
-    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, show_axes, show_texture, false);
+    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, show_texture, false);
 }
 
 void Bed3D::render_for_picking(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor)
 {
-    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, false, false, true);
+    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, false, true);
 }
 
 void Bed3D::render_internal(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor,
-    bool show_axes, bool show_texture, bool picking)
+    bool show_texture, bool picking)
 {
     m_scale_factor = scale_factor;
 
     glsafe(::glEnable(GL_DEPTH_TEST));
 
-    if (show_axes)
-        render_axes();
-
     m_model.model.set_color(picking ? PICKING_MODEL_COLOR : DEFAULT_MODEL_COLOR);
 
     switch (m_type)
@@ -314,9 +311,6 @@ std::tuple<Bed3D::Type, std::string, std::string> Bed3D::detect_type(const Point
 
 void Bed3D::render_axes()
 {
-    if (!m_show_axes)
-        return;
-
     if (m_build_volume.valid())
         m_axes.render(Transform3d::Identity(), 0.25f);
 }

src/slic3r/GUI/3DBed.hpp

@@ -50,7 +50,6 @@ private:
     CoordAxes m_axes;
 
     float m_scale_factor{ 1.0f };
-    bool m_show_axes{ true };
 
 public:
     Bed3D() = default;
@@ -78,9 +77,8 @@ public:
     bool contains(const Point& point) const;
     Point point_projection(const Point& point) const;
 
-    void toggle_show_axes() { m_show_axes = !m_show_axes; }
+    void render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_texture);
-
+    void render_axes();
-    void render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_axes, bool show_texture);
     void render_for_picking(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor);
 
 private:
@@ -91,8 +89,7 @@ private:
     void init_contourlines();
     static std::tuple<Type, std::string, std::string> detect_type(const Pointfs& shape);
     void render_internal(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor,
-        bool show_axes, bool show_texture, bool picking);
+        bool show_texture, bool picking);
-    void render_axes();
     void render_system(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool show_texture);
     void render_texture(bool bottom, GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix);
     void render_model(const Transform3d& view_matrix, const Transform3d& projection_matrix);

src/slic3r/GUI/3DScene.cpp

@@ -480,11 +480,11 @@ int GLVolumeCollection::load_object_volume(
 
 #if ENABLE_OPENGL_ES
 int GLVolumeCollection::load_wipe_tower_preview(
-    float pos_x, float pos_y, float width, float depth, float height,
+    float pos_x, float pos_y, float width, float depth, float height, float cone_angle,
     float rotation_angle, bool size_unknown, float brim_width, TriangleMesh* out_mesh)
 #else
 int GLVolumeCollection::load_wipe_tower_preview(
-    float pos_x, float pos_y, float width, float depth, float height,
+    float pos_x, float pos_y, float width, float depth, float height, float cone_angle,
     float rotation_angle, bool size_unknown, float brim_width)
 #endif // ENABLE_OPENGL_ES
 {
@@ -544,6 +544,21 @@ int GLVolumeCollection::load_wipe_tower_preview(
     brim_mesh.translate(-brim_width, -brim_width, 0.f);
     mesh.merge(brim_mesh);
 
+    // Now the stabilization cone and its base.
+    const auto [R, scale_x] = WipeTower::get_wipe_tower_cone_base(width, height, depth, cone_angle);
+    if (R > 0.) {
+        TriangleMesh cone_mesh(its_make_cone(R, height));
+        cone_mesh.scale(Vec3f(1.f/scale_x, 1.f, 1.f));
+
+        TriangleMesh disk_mesh(its_make_cylinder(R, brim_height));
+        disk_mesh.scale(Vec3f(1. / scale_x, 1., 1.)); // Now it matches the base, which may be elliptic.
+        disk_mesh.scale(Vec3f(1.f + scale_x*brim_width/R, 1.f + brim_width/R, 1.f)); // Scale so the brim is not deformed.
+        cone_mesh.merge(disk_mesh);
+        cone_mesh.translate(width / 2., depth / 2., 0.);
+        mesh.merge(cone_mesh);
+    }
+
+
     volumes.emplace_back(new GLVolume(color));
     GLVolume& v = *volumes.back();
 #if ENABLE_OPENGL_ES
@@ -564,6 +579,71 @@ int GLVolumeCollection::load_wipe_tower_preview(
     return int(volumes.size() - 1);
 }
 
+// Load SLA auxiliary GLVolumes (for support trees or pad).
+// This function produces volumes for multiple instances in a single shot,
+// as some object specific mesh conversions may be expensive.
+void GLVolumeCollection::load_object_auxiliary(
+    const SLAPrintObject*           print_object,
+    int                             obj_idx,
+    // pairs of <instance_idx, print_instance_idx>
+    const std::vector<std::pair<size_t, size_t>>& instances,
+    SLAPrintObjectStep              milestone,
+    // Timestamp of the last change of the milestone
+    size_t                          timestamp)
+{
+    if (print_object->get_mesh_to_print() == nullptr)
+        return;
+    const Transform3d mesh_trafo_inv = print_object->trafo().inverse();
+
+    auto add_volume = [this, &instances, timestamp](int obj_idx, int inst_idx, const ModelInstance& model_instance, SLAPrintObjectStep step,
+        const TriangleMesh& mesh, const ColorRGBA& color, std::optional<const TriangleMesh> convex_hull = std::nullopt) {
+        if (mesh.empty())
+            return;
+
+        GLVolume& v = *this->volumes.emplace_back(new GLVolume(color));
+#if ENABLE_SMOOTH_NORMALS
+        v.model.init_from(mesh, true);
+#else
+        v.model.init_from(mesh);
+        v.model.set_color(color);
+        v.mesh_raycaster = std::make_unique<GUI::MeshRaycaster>(std::make_shared<const TriangleMesh>(mesh));
+#endif // ENABLE_SMOOTH_NORMALS
+        v.composite_id = GLVolume::CompositeID(obj_idx, -int(step), inst_idx);
+        v.geometry_id = std::pair<size_t, size_t>(timestamp, model_instance.id().id);
+        if (convex_hull.has_value())
+            v.set_convex_hull(*convex_hull);
+        v.is_modifier = false;
+        v.shader_outside_printer_detection_enabled = (step == slaposSupportTree);
+        v.set_instance_transformation(model_instance.get_transformation());
+    };
+ 
+    // Get the support mesh.
+    if (milestone == SLAPrintObjectStep::slaposSupportTree) {
+        TriangleMesh supports_mesh = print_object->support_mesh();
+        if (!supports_mesh.empty()) {
+            supports_mesh.transform(mesh_trafo_inv);
+            TriangleMesh convex_hull = supports_mesh.convex_hull_3d();
+            for (const std::pair<size_t, size_t>& instance_idx : instances) {
+              const ModelInstance& model_instance = *print_object->model_object()->instances[instance_idx.first];
+              add_volume(obj_idx, (int)instance_idx.first, model_instance, slaposSupportTree, supports_mesh, GLVolume::SLA_SUPPORT_COLOR, convex_hull);
+            }
+        }
+    }
+
+    // Get the pad mesh.
+    if (milestone == SLAPrintObjectStep::slaposPad) {
+        TriangleMesh pad_mesh = print_object->pad_mesh();
+        if (!pad_mesh.empty()) {
+            pad_mesh.transform(mesh_trafo_inv);
+            TriangleMesh convex_hull = pad_mesh.convex_hull_3d();
+            for (const std::pair<size_t, size_t>& instance_idx : instances) {
+                const ModelInstance& model_instance = *print_object->model_object()->instances[instance_idx.first];
+                add_volume(obj_idx, (int)instance_idx.first, model_instance, slaposPad, pad_mesh, GLVolume::SLA_PAD_COLOR, convex_hull);
+            }
+        }
+    }
+}
+
 GLVolume* GLVolumeCollection::new_toolpath_volume(const ColorRGBA& rgba)
 {
     GLVolume* out = new_nontoolpath_volume(rgba);

src/slic3r/GUI/3DScene.hpp

@@ -396,12 +396,22 @@ public:
 
 #if ENABLE_OPENGL_ES
     int load_wipe_tower_preview(
-        float pos_x, float pos_y, float width, float depth, float height, float rotation_angle, bool size_unknown, float brim_width, TriangleMesh* out_mesh = nullptr);
+        float pos_x, float pos_y, float width, float depth, float height, float cone_angle, float rotation_angle, bool size_unknown, float brim_width, TriangleMesh* out_mesh = nullptr);
 #else
     int load_wipe_tower_preview(
-        float pos_x, float pos_y, float width, float depth, float height, float rotation_angle, bool size_unknown, float brim_width);
+        float pos_x, float pos_y, float width, float depth, float height, float cone_angle, float rotation_angle, bool size_unknown, float brim_width);
 #endif // ENABLE_OPENGL_ES
 
+    // Load SLA auxiliary GLVolumes (for support trees or pad).
+    void load_object_auxiliary(
+        const SLAPrintObject* print_object,
+        int                             obj_idx,
+        // pairs of <instance_idx, print_instance_idx>
+        const std::vector<std::pair<size_t, size_t>>& instances,
+        SLAPrintObjectStep              milestone,
+        // Timestamp of the last change of the milestone
+        size_t                          timestamp);
+
     GLVolume* new_toolpath_volume(const ColorRGBA& rgba);
     GLVolume* new_nontoolpath_volume(const ColorRGBA& rgba);
     // Render the volumes by OpenGL.

src/slic3r/GUI/AboutDialog.cpp

@@ -41,9 +41,9 @@ void AboutDialogLogo::onRepaint(wxEvent &event)
 // CopyrightsDialog
 // -----------------------------------------
 CopyrightsDialog::CopyrightsDialog()
-    : DPIDialog(static_cast<wxWindow*>(wxGetApp().mainframe), wxID_ANY, from_u8((boost::format("%1% - %2%")
+    : DPIDialog(static_cast<wxWindow*>(wxGetApp().mainframe), wxID_ANY, format_wxstr("%1% - %2%"
-        % (wxGetApp().is_editor() ? SLIC3R_APP_NAME : GCODEVIEWER_APP_NAME)
+        , wxGetApp().is_editor() ? SLIC3R_APP_NAME : GCODEVIEWER_APP_NAME
-        % _utf8(L("Portions copyright"))).str()),
+        , _L("Portions copyright")),
         wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
     this->SetFont(wxGetApp().normal_font());
@@ -141,7 +141,6 @@ wxString CopyrightsDialog::get_html_text()
     const auto bgr_clr_str = encode_color(ColorRGB(bgr_clr.Red(), bgr_clr.Green(), bgr_clr.Blue()));
 
     const wxString copyright_str = _L("Copyright") + "&copy; ";
-    // TRN "Slic3r _is licensed under the_ License"
     const wxString header_str = _L("License agreements of all following programs (libraries) are part of application license agreement");
 
     wxString text = wxString::Format(
@@ -211,7 +210,7 @@ void CopyrightsDialog::onCloseDialog(wxEvent &)
 }
 
 AboutDialog::AboutDialog()
-    : DPIDialog(static_cast<wxWindow*>(wxGetApp().mainframe), wxID_ANY, from_u8((boost::format(_utf8(L("About %s"))) % (wxGetApp().is_editor() ? SLIC3R_APP_NAME : GCODEVIEWER_APP_NAME)).str()), wxDefaultPosition,
+    : DPIDialog(static_cast<wxWindow*>(wxGetApp().mainframe), wxID_ANY, format_wxstr(_L("About %s"), wxGetApp().is_editor() ? SLIC3R_APP_NAME : GCODEVIEWER_APP_NAME), wxDefaultPosition,
         wxDefaultSize, /*wxCAPTION*/wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
     SetFont(wxGetApp().normal_font());
@@ -267,14 +266,13 @@ AboutDialog::AboutDialog()
         int size[] = {fs,fs,fs,fs,fs,fs,fs};
         m_html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
         m_html->SetBorders(2);
-        const std::string copyright_str = _utf8(L("Copyright"));
+        const wxString copyright_str    = _L("Copyright");
-        // TRN "Slic3r _is licensed under the_ License"
+        // TRN AboutDialog: "Slic3r %1% GNU Affero General Public License"
-        const std::string is_lecensed_str = _utf8(L("is licensed under the"));
+        const wxString is_lecensed_str  = _L("is licensed under the");
-        const std::string license_str = _utf8(L("GNU Affero General Public License, version 3"));
+        const wxString license_str      = _L("GNU Affero General Public License, version 3");
-        const std::string based_on_str = _utf8(L("PrusaSlicer is based on Slic3r by Alessandro Ranellucci and the RepRap community."));
+        const wxString based_on_str     = _L("PrusaSlicer is based on Slic3r by Alessandro Ranellucci and the RepRap community.");
-        const std::string contributors_str = _utf8(L("Contributions by Henrik Brix Andersen, Nicolas Dandrimont, Mark Hindess, Petr Ledvina, Joseph Lenox, Y. Sapir, Mike Sheldrake, Vojtech Bubnik and numerous others."));
+        const wxString contributors_str = _L("Contributions by Henrik Brix Andersen, Nicolas Dandrimont, Mark Hindess, Petr Ledvina, Joseph Lenox, Y. Sapir, Mike Sheldrake, Vojtech Bubnik and numerous others.");
-        const auto text = from_u8(
+        const auto text = format_wxstr(
-            (boost::format(
             "<html>"
             "<body bgcolor= %1% link= %2%>"
             "<font color=%3%>"
@@ -288,12 +286,12 @@ AboutDialog::AboutDialog()
             "%9%"
             "</font>"
             "</body>"
-            "</html>") % bgr_clr_str % text_clr_str % text_clr_str
+            "</html>", bgr_clr_str, text_clr_str, text_clr_str
-            % copyright_str % copyright_str
+            , copyright_str, copyright_str
-            % is_lecensed_str
+            , is_lecensed_str
-            % license_str
+            , license_str
-            % based_on_str
+            , based_on_str
-            % contributors_str).str());
+            , contributors_str);
         m_html->SetPage(text);
         vsizer->Add(m_html, 1, wxEXPAND | wxBOTTOM, 10);
         m_html->Bind(wxEVT_HTML_LINK_CLICKED, &AboutDialog::onLinkClicked, this);

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -76,10 +76,10 @@ std::pair<std::string, bool> SlicingProcessCompletedEvent::format_error_message(
 	try {
 		this->rethrow_exception();
     } catch (const std::bad_alloc &ex) {
-        wxString errmsg = GUI::from_u8((boost::format(_utf8(L("%s has encountered an error. It was likely caused by running out of memory. "
+		error = GUI::format(_L("%s has encountered an error. It was likely caused by running out of memory. "
                               "If you are sure you have enough RAM on your system, this may also be a bug and we would "
-                              "be glad if you reported it."))) % SLIC3R_APP_NAME).str());
+                              "be glad if you reported it."), SLIC3R_APP_NAME);
-        error = std::string(errmsg.ToUTF8()) + "\n\n" + std::string(ex.what());
+        error += "\n\n" + std::string(ex.what());
     } catch (const HardCrash &ex) {
         error = GUI::format(_L("PrusaSlicer has encountered a fatal error: \"%1%\""), ex.what()) + "\n\n" +
         		_u8L("Please save your project and restart PrusaSlicer. "
@@ -159,7 +159,7 @@ void BackgroundSlicingProcess::process_fff()
 			wxQueueEvent(GUI::wxGetApp().mainframe->m_plater, new wxCommandEvent(m_event_export_began_id));
 			prepare_upload();
 	    } else {
-			m_print->set_status(100, _utf8(L("Slicing complete")));
+			m_print->set_status(100, _u8L("Slicing complete"));
 	    }
 		this->set_step_done(bspsGCodeFinalize);
 	}
@@ -180,12 +180,12 @@ void BackgroundSlicingProcess::process_sla()
 
             m_sla_print->export_print(export_path, thumbnails);
 
-            m_print->set_status(100, (boost::format(_utf8(L("Masked SLA file exported to %1%"))) % export_path).str());
+            m_print->set_status(100, GUI::format(_L("Masked SLA file exported to %1%"), export_path));
         } else if (! m_upload_job.empty()) {
 			wxQueueEvent(GUI::wxGetApp().mainframe->m_plater, new wxCommandEvent(m_event_export_began_id));
             prepare_upload();
         } else {
-			m_print->set_status(100, _utf8(L("Slicing complete")));
+			m_print->set_status(100, _u8L("Slicing complete"));
         }
         this->set_step_done(bspsGCodeFinalize);
     }
@@ -649,7 +649,7 @@ bool BackgroundSlicingProcess::invalidate_all_steps()
 // Copy the final G-code to target location (possibly a SD card, if it is a removable media, then verify that the file was written without an error).
 void BackgroundSlicingProcess::finalize_gcode()
 {
-	m_print->set_status(95, _utf8(L("Running post-processing scripts")));
+	m_print->set_status(95, _u8L("Running post-processing scripts"));
 
 	// Perform the final post-processing of the export path by applying the print statistics over the file name.
 	std::string export_path = m_fff_print->print_statistics().finalize_output_path(m_export_path);
@@ -680,32 +680,32 @@ void BackgroundSlicingProcess::finalize_gcode()
 	catch (...)
 	{
 		remove_post_processed_temp_file();
-		throw Slic3r::ExportError(_utf8(L("Unknown error occured during exporting G-code.")));
+		throw Slic3r::ExportError(_u8L("Unknown error occured during exporting G-code."));
 	}
 	switch (copy_ret_val) {
 	case CopyFileResult::SUCCESS: break; // no error
 	case CopyFileResult::FAIL_COPY_FILE:
-		throw Slic3r::ExportError((boost::format(_utf8(L("Copying of the temporary G-code to the output G-code failed. Maybe the SD card is write locked?\nError message: %1%"))) % error_message).str());
+		throw Slic3r::ExportError(GUI::format(_L("Copying of the temporary G-code to the output G-code failed. Maybe the SD card is write locked?\nError message: %1%"), error_message));
 		break;
 	case CopyFileResult::FAIL_FILES_DIFFERENT:
-		throw Slic3r::ExportError((boost::format(_utf8(L("Copying of the temporary G-code to the output G-code failed. There might be problem with target device, please try exporting again or using different device. The corrupted output G-code is at %1%.tmp."))) % export_path).str());
+		throw Slic3r::ExportError(GUI::format(_L("Copying of the temporary G-code to the output G-code failed. There might be problem with target device, please try exporting again or using different device. The corrupted output G-code is at %1%.tmp."), export_path));
 		break;
 	case CopyFileResult::FAIL_RENAMING:
-		throw Slic3r::ExportError((boost::format(_utf8(L("Renaming of the G-code after copying to the selected destination folder has failed. Current path is %1%.tmp. Please try exporting again."))) % export_path).str());
+		throw Slic3r::ExportError(GUI::format(_L("Renaming of the G-code after copying to the selected destination folder has failed. Current path is %1%.tmp. Please try exporting again."), export_path));
 		break;
 	case CopyFileResult::FAIL_CHECK_ORIGIN_NOT_OPENED:
-		throw Slic3r::ExportError((boost::format(_utf8(L("Copying of the temporary G-code has finished but the original code at %1% couldn't be opened during copy check. The output G-code is at %2%.tmp."))) % output_path % export_path).str());
+		throw Slic3r::ExportError(GUI::format(_L("Copying of the temporary G-code has finished but the original code at %1% couldn't be opened during copy check. The output G-code is at %2%.tmp."), output_path, export_path));
 		break;
 	case CopyFileResult::FAIL_CHECK_TARGET_NOT_OPENED:
-		throw Slic3r::ExportError((boost::format(_utf8(L("Copying of the temporary G-code has finished but the exported code couldn't be opened during copy check. The output G-code is at %1%.tmp."))) % export_path).str());
+		throw Slic3r::ExportError(GUI::format(_L("Copying of the temporary G-code has finished but the exported code couldn't be opened during copy check. The output G-code is at %1%.tmp."), export_path));
 		break;
 	default:
-		throw Slic3r::ExportError(_utf8(L("Unknown error occured during exporting G-code.")));
+		throw Slic3r::ExportError(_u8L("Unknown error occured during exporting G-code."));
 		BOOST_LOG_TRIVIAL(error) << "Unexpected fail code(" << (int)copy_ret_val << ") durring copy_file() to " << export_path << ".";
 		break;
 	}
 
-	m_print->set_status(100, (boost::format(_utf8(L("G-code file exported to %1%"))) % export_path).str());
+	m_print->set_status(100, GUI::format(_L("G-code file exported to %1%"), export_path));
 }
 
 // A print host upload job has been scheduled, enqueue it to the printhost job queue
@@ -716,10 +716,10 @@ void BackgroundSlicingProcess::prepare_upload()
 		/ boost::filesystem::unique_path("." SLIC3R_APP_KEY ".upload.%%%%-%%%%-%%%%-%%%%");
 
 	if (m_print == m_fff_print) {
-		m_print->set_status(95, _utf8(L("Running post-processing scripts")));
+		m_print->set_status(95, _u8L("Running post-processing scripts"));
 		std::string error_message;
 		if (copy_file(m_temp_output_path, source_path.string(), error_message) != SUCCESS)
-			throw Slic3r::RuntimeError(_utf8(L("Copying of the temporary G-code to the output G-code failed")));
+			throw Slic3r::RuntimeError(_u8L("Copying of the temporary G-code to the output G-code failed"));
         m_upload_job.upload_data.upload_path = m_fff_print->print_statistics().finalize_output_path(m_upload_job.upload_data.upload_path.string());
         // Make a copy of the source path, as run_post_process_scripts() is allowed to change it when making a copy of the source file
         // (not here, but when the final target is a file). 
@@ -735,7 +735,7 @@ void BackgroundSlicingProcess::prepare_upload()
         m_sla_print->export_print(source_path.string(),thumbnails, m_upload_job.upload_data.upload_path.filename().string());
     }
 
-    m_print->set_status(100, (boost::format(_utf8(L("Scheduling upload to `%1%`. See Window -> Print Host Upload Queue"))) % m_upload_job.printhost->get_host()).str());
+    m_print->set_status(100, GUI::format(_L("Scheduling upload to `%1%`. See Window -> Print Host Upload Queue"), m_upload_job.printhost->get_host()));
 
 	m_upload_job.upload_data.source_path = std::move(source_path);
 

src/slic3r/GUI/BedShapeDialog.cpp

@@ -128,6 +128,9 @@ void BedShape::apply_optgroup_values(ConfigOptionsGroupShp optgroup)
     }
 }
 
+BedShapeDialog::BedShapeDialog(wxWindow* parent) : DPIDialog(parent, wxID_ANY, _(L("Bed Shape")),
+        wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER) {}
+
 void BedShapeDialog::build_dialog(const ConfigOptionPoints& default_pt, const ConfigOptionString& custom_texture, const ConfigOptionString& custom_model)
 {
     SetFont(wxGetApp().normal_font());

src/slic3r/GUI/BedShapeDialog.hpp

@@ -5,7 +5,6 @@
 
 #include "GUI_Utils.hpp"
 #include "2DBed.hpp"
-#include "I18N.hpp"
 
 #include <libslic3r/BuildVolume.hpp>
 
@@ -93,8 +92,7 @@ class BedShapeDialog : public DPIDialog
 {
 	BedShapePanel*	m_panel;
 public:
-	BedShapeDialog(wxWindow* parent) : DPIDialog(parent, wxID_ANY, _(L("Bed Shape")),
+	BedShapeDialog(wxWindow* parent);
-        wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER) {}
 
     void build_dialog(const ConfigOptionPoints& default_pt, const ConfigOptionString& custom_texture, const ConfigOptionString& custom_model);
 

src/slic3r/GUI/BonjourDialog.cpp

@@ -224,14 +224,14 @@ void BonjourDialog::on_timer(wxTimerEvent &)
 // explicitly (wxTimerEvent should not be created by user code).
 void BonjourDialog::on_timer_process()
 {
-    const auto search_str = _utf8(L("Searching for devices"));
+    const auto search_str = _L("Searching for devices");
 
     if (timer_state > 0) {
         const std::string dots(timer_state, '.');
-        label->SetLabel(GUI::from_u8((boost::format("%1% %2%") % search_str % dots).str()));
+        label->SetLabel(search_str + dots);
         timer_state = (timer_state) % 3 + 1;
     } else {
-        label->SetLabel(GUI::from_u8((boost::format("%1%: %2%") % search_str % (_utf8(L("Finished"))+".")).str()));
+        label->SetLabel(search_str + ": " + _L("Finished") + ".");
         timer->Stop();
     }
 }

src/slic3r/GUI/ButtonsDescription.cpp

@@ -160,7 +160,7 @@ void FillSizerWithModeColorDescriptions(
 	wxFlexGridSizer* grid_sizer = new wxFlexGridSizer(9, 5, 5);
 	sizer->Add(grid_sizer, 0, wxEXPAND);
 
-	const std::vector<wxString> names = { _L("Simple"), _CTX(L_CONTEXT("Advanced", "Mode"), "Mode"), _L("Expert") };
+	const std::vector<wxString> names = { _L("Simple"), _CTX("Advanced", "Mode"), _L("Expert") };
 
 	for (size_t mode = 0; mode < names.size(); ++mode) {
 		wxColour& color = mode_palette[mode];

src/slic3r/GUI/ConfigManipulation.cpp

@@ -256,7 +256,7 @@ void ConfigManipulation::toggle_print_fff_options(DynamicPrintConfig* config)
 
     bool have_default_acceleration = config->opt_float("default_acceleration") > 0;
     for (auto el : { "perimeter_acceleration", "infill_acceleration", "top_solid_infill_acceleration",
-                    "solid_infill_acceleration", "external_perimeter_acceleration"
+                    "solid_infill_acceleration", "external_perimeter_acceleration",
                     "bridge_acceleration", "first_layer_acceleration" })
         toggle_field(el, have_default_acceleration);
 
@@ -319,8 +319,8 @@ void ConfigManipulation::toggle_print_fff_options(DynamicPrintConfig* config)
     toggle_field("standby_temperature_delta", have_ooze_prevention);
 
     bool have_wipe_tower = config->opt_bool("wipe_tower");
-    for (auto el : { "wipe_tower_x", "wipe_tower_y", "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_brim_width",
+    for (auto el : { "wipe_tower_x", "wipe_tower_y", "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_brim_width", "wipe_tower_cone_angle",
-                     "wipe_tower_bridging", "wipe_tower_no_sparse_layers", "single_extruder_multi_material_priming" })
+                     "wipe_tower_extra_spacing", "wipe_tower_bridging", "wipe_tower_no_sparse_layers", "single_extruder_multi_material_priming" })
         toggle_field(el, have_wipe_tower);
 
     toggle_field("avoid_crossing_curled_overhangs", !config->opt_bool("avoid_crossing_perimeters"));

src/slic3r/GUI/ConfigSnapshotDialog.cpp

@@ -9,6 +9,7 @@
 #include "GUI_App.hpp"
 #include "MainFrame.hpp"
 #include "wxExtensions.hpp"
+#include "format.hpp"
 
 namespace Slic3r { 
 namespace GUI {
@@ -89,10 +90,10 @@ static wxString generate_html_row(const Config::Snapshot &snapshot, bool row_eve
     }
 
     if (! compatible) {
-        text += "<p align=\"right\">" + from_u8((boost::format(_utf8(L("Incompatible with this %s"))) % SLIC3R_APP_NAME).str()) + "</p>";
+        text += "<p align=\"right\">" + format_wxstr(_L("Incompatible with this %s"), SLIC3R_APP_NAME) + "</p>";
     }
     else if (! snapshot_active)
-        text += "<p align=\"right\"><a href=\"" + snapshot.id + "\">" + _(L("Activate")) + "</a></p>";
+        text += "<p align=\"right\"><a href=\"" + snapshot.id + "\">" + _L("Activate") + "</a></p>";
     text += "</td>";
 	text += "</tr>";
     return text;

src/slic3r/GUI/ConfigWizard.cpp

@@ -56,6 +56,7 @@
 #include "MsgDialog.hpp"
 #include "UnsavedChangesDialog.hpp"
 #include "slic3r/Utils/AppUpdater.hpp"
+#include "slic3r/GUI/I18N.hpp"
 
 #if defined(__linux__) && defined(__WXGTK3__)
 #define wxLinux_gtk3 true
@@ -288,7 +289,7 @@ PrinterPicker::PrinterPicker(wxWindow *parent, const VendorProfile &vendor, wxSt
             const auto &variant = model.variants[i];
 
             const auto label = model.technology == ptFFF
-                ? from_u8((boost::format("%1% %2% %3%") % variant.name % _utf8(L("mm")) % _utf8(L("nozzle"))).str())
+                ? format_wxstr("%1% %2% %3%", variant.name, _L("mm"), _L("nozzle"))
                 : from_u8(model.name);
 
             if (i == 1) {
@@ -508,17 +509,17 @@ void ConfigWizardPage::append_spacer(int space)
 // Wizard pages
 
 PageWelcome::PageWelcome(ConfigWizard *parent)
-    : ConfigWizardPage(parent, from_u8((boost::format(
+    : ConfigWizardPage(parent, format_wxstr(
 #ifdef __APPLE__
-            _utf8(L("Welcome to the %s Configuration Assistant"))
+            _L("Welcome to the %s Configuration Assistant")
 #else
-            _utf8(L("Welcome to the %s Configuration Wizard"))
+            _L("Welcome to the %s Configuration Wizard")
 #endif
-            ) % SLIC3R_APP_NAME).str()), _L("Welcome"))
+            , SLIC3R_APP_NAME), _L("Welcome"))
-    , welcome_text(append_text(from_u8((boost::format(
+    , welcome_text(append_text(format_wxstr(
-        _utf8(L("Hello, welcome to %s! This %s helps you with the initial configuration; just a few settings and you will be ready to print.")))
+        _L("Hello, welcome to %s! This %s helps you with the initial configuration; just a few settings and you will be ready to print.")
-        % SLIC3R_APP_NAME
+        , SLIC3R_APP_NAME
-        % _utf8(ConfigWizard::name())).str())
+        , _(ConfigWizard::name()))
     ))
     , cbox_reset(append(
         new wxCheckBox(this, wxID_ANY, _L("Remove user profiles (a snapshot will be taken beforehand)"))
@@ -576,7 +577,7 @@ PagePrinters::PagePrinters(ConfigWizard *parent,
             continue;
         }
 
-        const auto picker_title = family.empty() ? wxString() : from_u8((boost::format(_utf8(L("%s Family"))) % family).str());
+        const auto picker_title = family.empty() ? wxString() : format_wxstr(_L("%s Family"), family);
         auto *picker = new PrinterPicker(this, vendor, picker_title, MAX_COLS, *appconfig, filter);
 
         picker->Bind(EVT_PRINTER_PICK, [this, appconfig](const PrinterPickerEvent &evt) {
@@ -786,11 +787,14 @@ void PageMaterials::set_compatible_printers_html_window(const std::vector<std::s
     const auto text_clr_str = encode_color(ColorRGB(text_clr.Red(), text_clr.Green(), text_clr.Blue()));
     wxString text;
     if (materials->technology == T_FFF && template_shown) {
+        // TRN ConfigWizard: Materials : "%1%" = "Filaments"/"SLA materials"
         text = format_wxstr(_L("%1% visible for <b>(\"Template\")</b> printer are universal profiles available for all printers. These might not be compatible with your printer."), materials->technology == T_FFF ? _L("Filaments") : _L("SLA materials"));
     } else {
+        // TRN ConfigWizard: Materials : "%1%" = "Filaments"/"SLA materials"
         wxString first_line = format_wxstr(_L("%1% marked with <b>*</b> are <b>not</b> compatible with some installed printers."), materials->technology == T_FFF ? _L("Filaments") : _L("SLA materials"));
 
         if (all_printers) {
+            // TRN ConfigWizard: Materials : "%1%" = "filament"/"SLA material"
             wxString second_line = format_wxstr(_L("All installed printers are compatible with the selected %1%."), materials->technology == T_FFF ? _L("filament") : _L("SLA material"));
             text = wxString::Format(
                 "<html>"
@@ -1368,7 +1372,7 @@ Worker::Worker(wxWindow* parent)
     button_path->Bind(wxEVT_BUTTON, [this](wxCommandEvent& event) {
         boost::filesystem::path chosen_dest(boost::nowide::narrow(m_input_path->GetValue()));
 
-        wxDirDialog dialog(m_parent, L("Choose folder:"), chosen_dest.string() );
+        wxDirDialog dialog(m_parent, _L("Choose folder") + ":", chosen_dest.string() );
         if (dialog.ShowModal() == wxID_OK)
             this->m_input_path->SetValue(dialog.GetPath());
     });
@@ -1420,11 +1424,12 @@ PageDownloader::PageDownloader(ConfigWizard* parent)
     box_allow_downloads->SetValue(box_allow_value);
     append(box_allow_downloads);
 
-    append_text(wxString::Format(_L(
+    // TRN ConfigWizard : Downloader : %1% = "PrusaSlicer"
-        "If enabled, %s registers to start on custom URL on www.printables.com."
+    append_text(format_wxstr(_L(
-        " You will be able to use button with %s logo to open models in this %s."
+        "If enabled, %1% registers to start on custom URL on www.printables.com."
+        " You will be able to use button with %1% logo to open models in this %1%."
         " The model will be downloaded into folder you choose bellow."
-    ), SLIC3R_APP_NAME, SLIC3R_APP_NAME, SLIC3R_APP_NAME));
+    ), SLIC3R_APP_NAME));
 
 #ifdef __linux__
     append_text(wxString::Format(_L(
@@ -1455,7 +1460,7 @@ bool DownloaderUtils::Worker::perform_register(const std::string& path_override/
         chosen_dest = aux_dest;
     ec.clear();
     if (chosen_dest.empty() || !boost::filesystem::is_directory(chosen_dest, ec) || ec) {
-        std::string err_msg = GUI::format("%1%\n\n%2%",_L("Chosen directory for downloads does not Exists.") ,chosen_dest.string());
+        std::string err_msg = GUI::format("%1%\n\n%2%",_L("Chosen directory for downloads does not exist.") ,chosen_dest.string());
         BOOST_LOG_TRIVIAL(error) << err_msg;
         show_error(m_parent, err_msg);
         return false;
@@ -1752,6 +1757,7 @@ void PageBedShape::apply_custom_config(DynamicPrintConfig &config)
 }
 
 PageBuildVolume::PageBuildVolume(ConfigWizard* parent)
+    // TRN ConfigWizard : Size of possible print, related on printer size
     : ConfigWizardPage(parent, _L("Build Volume"), _L("Build Volume"), 1)
     , build_volume(new DiamTextCtrl(this))
 {
@@ -1792,7 +1798,7 @@ PageBuildVolume::PageBuildVolume(ConfigWizard* parent)
     }, build_volume->GetId());
 
     auto* sizer_volume = new wxFlexGridSizer(3, 5, 5);
-    auto* text_volume = new wxStaticText(this, wxID_ANY, _L("Max print height:"));
+    auto* text_volume = new wxStaticText(this, wxID_ANY, _L("Max print height") + ":");
     auto* unit_volume = new wxStaticText(this, wxID_ANY, _L("mm"));
     sizer_volume->AddGrowableCol(0, 1);
     sizer_volume->Add(text_volume, 0, wxALIGN_CENTRE_VERTICAL);
@@ -1828,7 +1834,7 @@ PageDiameters::PageDiameters(ConfigWizard *parent)
     append_text(_L("Enter the diameter of your printer's hot end nozzle."));
 
     auto *sizer_nozzle = new wxFlexGridSizer(3, 5, 5);
-    auto *text_nozzle = new wxStaticText(this, wxID_ANY, _L("Nozzle Diameter:"));
+    auto *text_nozzle = new wxStaticText(this, wxID_ANY, _L("Nozzle Diameter") + ":");
     auto *unit_nozzle = new wxStaticText(this, wxID_ANY, _L("mm"));
     sizer_nozzle->AddGrowableCol(0, 1);
     sizer_nozzle->Add(text_nozzle, 0, wxALIGN_CENTRE_VERTICAL);
@@ -1842,7 +1848,7 @@ PageDiameters::PageDiameters(ConfigWizard *parent)
     append_text(_L("Good precision is required, so use a caliper and do multiple measurements along the filament, then compute the average."));
 
     auto *sizer_filam = new wxFlexGridSizer(3, 5, 5);
-    auto *text_filam = new wxStaticText(this, wxID_ANY, _L("Filament Diameter:"));
+    auto *text_filam = new wxStaticText(this, wxID_ANY, _L("Filament Diameter") + ":");
     auto *unit_filam = new wxStaticText(this, wxID_ANY, _L("mm"));
     sizer_filam->AddGrowableCol(0, 1);
     sizer_filam->Add(text_filam, 0, wxALIGN_CENTRE_VERTICAL);
@@ -1934,7 +1940,7 @@ PageTemperatures::PageTemperatures(ConfigWizard *parent)
     append_text(_L("A rule of thumb is 60 °C for PLA and 110 °C for ABS. Leave zero if you have no heated bed."));
 
     auto *sizer_bed = new wxFlexGridSizer(3, 5, 5);
-    auto *text_bed = new wxStaticText(this, wxID_ANY, _L("Bed Temperature:"));
+    auto *text_bed = new wxStaticText(this, wxID_ANY, _L("Bed Temperature") + ":");
     auto *unit_bed = new wxStaticText(this, wxID_ANY, _L("°C"));
     sizer_bed->AddGrowableCol(0, 1);
     sizer_bed->Add(text_bed, 0, wxALIGN_CENTRE_VERTICAL);

src/slic3r/GUI/CoordAxes.cpp

@@ -42,17 +42,23 @@ void CoordAxes::render(const Transform3d& trafo, float emission_factor)
     shader->start_using();
     shader->set_uniform("emission_factor", emission_factor);
 
+    // Scale the axes if the camera is close to them to avoid issues
+    // such as https://github.com/prusa3d/PrusaSlicer/issues/9483
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    Transform3d scale_tr = Transform3d::Identity();
+    scale_tr.scale(std::min(1., camera.get_inv_zoom() * 10.));
+
     // x axis
     m_arrow.set_color(ColorRGBA::X());
-    render_axis(*shader, trafo * Geometry::translation_transform(m_origin) * Geometry::rotation_transform({ 0.0, 0.5 * M_PI, 0.0 }));
+    render_axis(*shader, trafo * Geometry::translation_transform(m_origin) * Geometry::rotation_transform({ 0.0, 0.5 * M_PI, 0.0 }) * scale_tr);
 
     // y axis
     m_arrow.set_color(ColorRGBA::Y());
-    render_axis(*shader, trafo * Geometry::translation_transform(m_origin) * Geometry::rotation_transform({ -0.5 * M_PI, 0.0, 0.0 }));
+    render_axis(*shader, trafo * Geometry::translation_transform(m_origin) * Geometry::rotation_transform({ -0.5 * M_PI, 0.0, 0.0 }) * scale_tr);
 
     // z axis
     m_arrow.set_color(ColorRGBA::Z());
-    render_axis(*shader, trafo * Geometry::translation_transform(m_origin));
+    render_axis(*shader, trafo * Geometry::translation_transform(m_origin) * scale_tr);
 
     shader->stop_using();
     if (curr_shader != nullptr)

src/slic3r/GUI/DoubleSlider.cpp

@@ -106,7 +106,7 @@ Control::Control( wxWindow *parent,
     m_cog_icon_dim    = m_bmp_cog.GetWidth();
 
     m_selection = ssUndef;
-    m_ticks.set_pause_print_msg(_utf8(L("Place bearings in slots and resume printing")));
+    m_ticks.set_pause_print_msg(_u8L("Place bearings in slots and resume printing"));
     m_ticks.set_extruder_colors(&m_extruder_colors);
 
     // slider events

src/slic3r/GUI/Downloader.cpp

@@ -178,7 +178,7 @@ void Downloader::on_error(wxCommandEvent& event)
     BOOST_LOG_TRIVIAL(error) << "Download error: " << event.GetString();
 	NotificationManager* ntf_mngr = wxGetApp().notification_manager();
 	ntf_mngr->set_download_URL_error(id, boost::nowide::narrow(event.GetString()));
-	show_error(nullptr, format_wxstr(L"%1%\n%2%", _L("The download has failed:"), event.GetString()));
+	show_error(nullptr, format_wxstr(L"%1%\n%2%", _L("The download has failed") + ":", event.GetString()));
 }
 void Downloader::on_complete(wxCommandEvent& event)
 {

src/slic3r/GUI/DownloaderFileGet.cpp

@@ -190,6 +190,7 @@ void FileGet::priv::get_perform()
 	//assert(file != NULL);
 	if (file == NULL) {
 		wxCommandEvent* evt = new wxCommandEvent(EVT_DWNLDR_FILE_ERROR);
+		// TRN %1% = file path
 		evt->SetString(GUI::format_wxstr(_L("Can't create file at %1%."), temp_path_wstring));
 		evt->SetInt(m_id);
 		m_evt_handler->QueueEvent(evt);

src/slic3r/GUI/Field.cpp

@@ -226,7 +226,7 @@ void Field::get_value_by_opt_type(wxString& str, const bool check_value/* = true
             }
 
 			wxString label = m_opt.full_label.empty() ? _(m_opt.label) : _(m_opt.full_label);
-            show_error(m_parent, from_u8((boost::format(_utf8(L("%s doesn't support percentage"))) % label).str()));
+            show_error(m_parent, format_wxstr(_L("%s doesn't support percentage"), label));
 			set_value(double_to_string(m_opt.min), true);
 			m_value = double(m_opt.min);
 			break;
@@ -299,7 +299,7 @@ void Field::get_value_by_opt_type(wxString& str, const bool check_value/* = true
             // Workaroud to avoid of using of the % for first layer height
             // see https://github.com/prusa3d/PrusaSlicer/issues/7418
             wxString label = m_opt.full_label.empty() ? _(m_opt.label) : _(m_opt.full_label);
-            show_error(m_parent, from_u8((boost::format(_utf8(L("%s doesn't support percentage"))) % label).str()));
+            show_error(m_parent, format_wxstr(_L("%s doesn't support percentage"), label));
             const wxString stVal = double_to_string(0.01, 2);
             set_value(stVal, true);
             m_value = into_u8(stVal);;
@@ -341,9 +341,10 @@ void Field::get_value_by_opt_type(wxString& str, const bool check_value/* = true
 
                 const std::string sidetext = m_opt.sidetext.rfind("mm/s") != std::string::npos ? "mm/s" : "mm";
                 const wxString stVal = double_to_string(val, 2);
-                const wxString msg_text = from_u8((boost::format(_utf8(L("Do you mean %s%% instead of %s %s?\n"
+                // TRN %1% = Value, %2% = units
-                    "Select YES if you want to change this value to %s%%, \n"
+                const wxString msg_text = format_wxstr(_L("Do you mean %1%%% instead of %1% %2%?\n"
-                    "or NO if you are sure that %s %s is a correct value."))) % stVal % stVal % sidetext % stVal % stVal % sidetext).str());
+                    "Select YES if you want to change this value to %1%%%, \n"
+                    "or NO if you are sure that %1% %2% is a correct value."), stVal, sidetext);
                 WarningDialog dialog(m_parent, msg_text, _L("Parameter validation") + ": " + m_opt_id, wxYES | wxNO);
                 if ((!infill_anchors || val > 100) && dialog.ShowModal() == wxID_YES) {
                     set_value(from_u8((boost::format("%s%%") % stVal).str()), false/*true*/);

src/slic3r/GUI/FileArchiveDialog.cpp

@@ -166,11 +166,11 @@ ArchiveViewCtrl::~ArchiveViewCtrl()
     }
 }
 
-FileArchiveDialog::FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* archive, std::vector<boost::filesystem::path>& selected_paths)
+FileArchiveDialog::FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* archive, std::vector<std::pair<boost::filesystem::path, size_t>>& selected_paths_w_size)
     : DPIDialog(parent_window, wxID_ANY, _(L("Archive preview")), wxDefaultPosition,
         wxSize(45 * wxGetApp().em_unit(), 40 * wxGetApp().em_unit()),
         wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMAXIMIZE_BOX)
-    , m_selected_paths (selected_paths)
+    , m_selected_paths_w_size (selected_paths_w_size)
 {
 #ifdef _WIN32
     wxGetApp().UpdateDarkUI(this);
@@ -206,14 +206,14 @@ FileArchiveDialog::FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* ar
             reduce_stack(stack, struct_size);
         }
         if (!file.has_extension() && stack.size() == struct_size)
-            stack.push_back(avc->get_model()->AddFile((stack.empty() ? std::shared_ptr<ArchiveViewNode>(nullptr) : stack.back()), GUI::format_wxstr(file.filename().string()), true)); // filename string to wstring?
+            stack.push_back(avc->get_model()->AddFile((stack.empty() ? std::shared_ptr<ArchiveViewNode>(nullptr) : stack.back()), boost::nowide::widen(file.filename().string()), true)); // filename string to wstring?
         return struct_size + 1;
     };
 
     const std::regex pattern_drop(".*[.](stl|obj|amf|3mf|prusa|step|stp)", std::regex::icase);
     mz_uint num_entries = mz_zip_reader_get_num_files(archive);
     mz_zip_archive_file_stat stat;
-    std::vector<boost::filesystem::path> filtered_entries;
+    std::vector<std::pair<boost::filesystem::path, size_t>> filtered_entries; // second is unzipped size
     for (mz_uint i = 0; i < num_entries; ++i) {
         if (mz_zip_reader_file_stat(archive, i, &stat)) {
             std::string extra(1024, 0);
@@ -223,7 +223,7 @@ FileArchiveDialog::FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* ar
                 path = boost::filesystem::path(extra.substr(0, extra_size));
             } else {
                 wxString wname = boost::nowide::widen(stat.m_filename);
-                std::string name = GUI::format(wname);
+                std::string name = boost::nowide::narrow(wname);
                 path = boost::filesystem::path(name);
             }
             assert(!path.empty());
@@ -232,22 +232,25 @@ FileArchiveDialog::FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* ar
             // filter out MACOS specific hidden files
             if (boost::algorithm::starts_with(path.string(), "__MACOSX"))
                 continue;
-            filtered_entries.emplace_back(std::move(path));
+            filtered_entries.emplace_back(std::move(path), stat.m_uncomp_size);
         }
     }
     // sorting files will help adjust_stack function to not create multiple same folders
-    std::sort(filtered_entries.begin(), filtered_entries.end(), [](const boost::filesystem::path& p1, const boost::filesystem::path& p2){ return p1.string() > p2.string(); });
+    std::sort(filtered_entries.begin(), filtered_entries.end(), [](const std::pair<boost::filesystem::path, size_t>& p1, const std::pair<boost::filesystem::path, size_t>& p2){ return p1.first.string() < p2.first.string(); });
     size_t entry_count = 0;
     size_t depth = 1;
-    for (const boost::filesystem::path& path : filtered_entries)
+    for (const auto& entry : filtered_entries)
     {
+        const boost::filesystem::path& path = entry.first;
         std::shared_ptr<ArchiveViewNode> parent(nullptr);
 
         depth = std::max(depth, adjust_stack(path, stack));
         if (!stack.empty())
             parent = stack.back();
         if (std::regex_match(path.extension().string(), pattern_drop)) { // this leaves out non-compatible files 
-            m_avc->get_model()->AddFile(parent, GUI::format_wxstr(path.filename().string()), false)->set_fullpath(/*std::move(path)*/path); // filename string to wstring?
+            std::shared_ptr<ArchiveViewNode> new_node = m_avc->get_model()->AddFile(parent, boost::nowide::widen(path.filename().string()), false);
+            new_node->set_fullpath(/*std::move(path)*/path); // filename string to wstring?
+            new_node->set_size(entry.second);
             entry_count++;
         }
     }
@@ -305,12 +308,12 @@ void FileArchiveDialog::on_open_button()
     wxDataViewItemArray top_items;
     m_avc->get_model()->GetChildren(wxDataViewItem(nullptr), top_items);
     
-    std::function<void(ArchiveViewNode*)> deep_fill = [&paths = m_selected_paths, &deep_fill](ArchiveViewNode* node){
+    std::function<void(ArchiveViewNode*)> deep_fill = [&paths = m_selected_paths_w_size, &deep_fill](ArchiveViewNode* node){
         if (node == nullptr)
             return;
         if (node->get_children().empty()) {
             if (node->get_toggle()) 
-                paths.emplace_back(node->get_fullpath());
+                paths.emplace_back(node->get_fullpath(), node->get_size());
         } else { 
             for (std::shared_ptr<ArchiveViewNode> child : node->get_children())
                 deep_fill(child.get());

src/slic3r/GUI/FileArchiveDialog.hpp

@@ -33,6 +33,8 @@ public:
     void                                            set_is_folder(bool is_folder)                       { m_folder = is_folder; }
     void                                            set_fullpath(boost::filesystem::path path)          { m_fullpath = path; }
     boost::filesystem::path                         get_fullpath() const                                { return m_fullpath; }
+    void                                            set_size(size_t size)                               { m_size = size; }
+    size_t                                          get_size() const                                    { return m_size; }
 
 private:
     wxString m_name;
@@ -43,6 +45,7 @@ private:
     bool        m_folder { false };
     boost::filesystem::path m_fullpath;
     bool        m_container { false };
+    size_t      m_size { 0 };
 };
 
 class ArchiveViewModel : public wxDataViewModel
@@ -100,7 +103,7 @@ protected:
 class FileArchiveDialog : public DPIDialog
 {
 public:
-    FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* archive, std::vector<boost::filesystem::path>& selected_paths);
+    FileArchiveDialog(wxWindow* parent_window, mz_zip_archive* archive, std::vector<std::pair<boost::filesystem::path, size_t>>& selected_paths_w_size);
         
 protected:
     void on_dpi_changed(const wxRect& suggested_rect) override;
@@ -109,7 +112,9 @@ protected:
     void on_all_button();
     void on_none_button();
 
-    std::vector<boost::filesystem::path>& m_selected_paths;
+    // chosen files are written into this vector and returned to caller via reference.
+    // path in archive and decompressed size. The size can be used to distinguish between files with same path.
+    std::vector<std::pair<boost::filesystem::path,size_t>>& m_selected_paths_w_size;
     ArchiveViewCtrl* m_avc;
 };
 

src/slic3r/GUI/GCodeViewer.cpp

@@ -2253,7 +2253,7 @@ void GCodeViewer::load_shells(const Print& print)
             const WipeTowerData& wipe_tower_data = print.wipe_tower_data(extruders_count);
             const float depth = wipe_tower_data.depth;
             const float brim_width = wipe_tower_data.brim_width;
-            m_shells.volumes.load_wipe_tower_preview(config.wipe_tower_x, config.wipe_tower_y, config.wipe_tower_width, depth, max_z, config.wipe_tower_rotation_angle,
+            m_shells.volumes.load_wipe_tower_preview(config.wipe_tower_x, config.wipe_tower_y, config.wipe_tower_width, depth, max_z, config.wipe_tower_cone_angle, config.wipe_tower_rotation_angle,
                 !print.is_step_done(psWipeTower), brim_width);
         }
     }

src/slic3r/GUI/GLCanvas3D.cpp

@@ -728,7 +728,7 @@ void GLCanvas3D::Labels::render(const std::vector<const ModelInstance*>& sorted_
                 return owner.model_instance_id == id;
                 });
             if (it != owners.end())
-                it->print_order = std::string((_(L("Seq."))).ToUTF8()) + "#: " + std::to_string(i + 1);
+                it->print_order = _u8L("Seq.") + "#: " + std::to_string(i + 1);
         }
     }
 
@@ -1405,7 +1405,6 @@ void GLCanvas3D::enable_legend_texture(bool enable)
 void GLCanvas3D::enable_picking(bool enable)
 {
     m_picking_enabled = enable;
-    m_selection.set_mode(Selection::Instance);
 }
 
 void GLCanvas3D::enable_moving(bool enable)
@@ -1571,8 +1570,9 @@ void GLCanvas3D::render()
     _render_objects(GLVolumeCollection::ERenderType::Opaque);
     _render_sla_slices();
     _render_selection();
+    _render_bed_axes();
     if (is_looking_downward)
-        _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), false, true);
+        _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), false);
     if (!m_main_toolbar.is_enabled())
         _render_gcode();
     _render_objects(GLVolumeCollection::ERenderType::Transparent);
@@ -1595,7 +1595,7 @@ void GLCanvas3D::render()
     _render_selection_sidebar_hints();
     _render_current_gizmo();
     if (!is_looking_downward)
-        _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), true, true);
+        _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), true);
 
 #if ENABLE_RAYCAST_PICKING_DEBUG
     if (m_picking_enabled && !m_mouse.dragging && !m_gizmos.is_dragging() && !m_rectangle_selection.is_dragging())
@@ -1877,6 +1877,15 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
         size_t                      volume_idx;
     };
 
+    // SLA steps to pull the preview meshes for.
+    typedef std::array<SLAPrintObjectStep, 3> SLASteps;
+    SLASteps sla_steps = { slaposDrillHoles, slaposSupportTree, slaposPad };
+    struct SLASupportState {
+        std::array<PrintStateBase::StateWithTimeStamp, std::tuple_size<SLASteps>::value> step;
+    };
+    // State of the sla_steps for all SLAPrintObjects.
+    std::vector<SLASupportState> sla_support_state;
+
     std::vector<size_t> instance_ids_selected;
     std::vector<size_t> map_glvolume_old_to_new(m_volumes.volumes.size(), size_t(-1));
     std::vector<GLVolumeState> deleted_volumes;
@@ -1902,6 +1911,37 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
         }
     }
 
+    if (printer_technology == ptSLA) {
+        const SLAPrint* sla_print = this->sla_print();
+#ifndef NDEBUG
+        // Verify that the SLAPrint object is synchronized with m_model.
+        check_model_ids_equal(*m_model, sla_print->model());
+#endif // NDEBUG
+        sla_support_state.reserve(sla_print->objects().size());
+        for (const SLAPrintObject* print_object : sla_print->objects()) {
+            SLASupportState state;
+            for (size_t istep = 0; istep < sla_steps.size(); ++istep) {
+                state.step[istep] = print_object->step_state_with_timestamp(sla_steps[istep]);
+                if (state.step[istep].state == PrintStateBase::State::Done) {
+                    std::shared_ptr<const indexed_triangle_set> m = print_object->get_mesh_to_print();
+                    if (m == nullptr || m->empty())
+                        // Consider the DONE step without a valid mesh as invalid for the purpose
+                        // of mesh visualization.
+                        state.step[istep].state = PrintStateBase::State::Invalidated;
+                    else {
+                        for (const ModelInstance* model_instance : print_object->model_object()->instances) {
+                            // Only the instances, which are currently printable, will have the SLA support structures kept.
+                            // The instances outside the print bed will have the GLVolumes of their support structures released.
+                            if (model_instance->is_printable())
+                                aux_volume_state.emplace_back(state.step[istep].timestamp, model_instance->id());
+                        }
+                    }
+                }
+            }
+            sla_support_state.emplace_back(state);
+        }
+    }
+
     std::sort(model_volume_state.begin(), model_volume_state.end(), model_volume_state_lower);
     std::sort(aux_volume_state.begin(), aux_volume_state.end(), model_volume_state_lower);
     // Release all ModelVolume based GLVolumes not found in the current Model. Find the GLVolume of a hollowed mesh.
@@ -2016,6 +2056,75 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
         }
     }
 
+    if (printer_technology == ptSLA) {
+        size_t idx = 0;
+        const SLAPrint *sla_print = this->sla_print();
+        std::vector<double> shift_zs(m_model->objects.size(), 0);
+        double relative_correction_z = sla_print->relative_correction().z();
+        if (relative_correction_z <= EPSILON)
+            relative_correction_z = 1.;
+        for (const SLAPrintObject *print_object : sla_print->objects()) {
+            SLASupportState   &state        = sla_support_state[idx ++];
+            const ModelObject *model_object = print_object->model_object();
+            // Find an index of the ModelObject
+            int object_idx;
+            // There may be new SLA volumes added to the scene for this print_object.
+            // Find the object index of this print_object in the Model::objects list.
+            auto it = std::find(sla_print->model().objects.begin(), sla_print->model().objects.end(), model_object);
+            assert(it != sla_print->model().objects.end());
+            object_idx = it - sla_print->model().objects.begin();
+            // Cache the Z offset to be applied to all volumes with this object_idx.
+            shift_zs[object_idx] = print_object->get_current_elevation() / relative_correction_z;
+            // Collect indices of this print_object's instances, for which the SLA support meshes are to be added to the scene.
+            // pairs of <instance_idx, print_instance_idx>
+            std::vector<std::pair<size_t, size_t>> instances[std::tuple_size<SLASteps>::value];
+            for (size_t print_instance_idx = 0; print_instance_idx < print_object->instances().size(); ++ print_instance_idx) {
+                const SLAPrintObject::Instance &instance = print_object->instances()[print_instance_idx];
+                // Find index of ModelInstance corresponding to this SLAPrintObject::Instance.
+                auto it = std::find_if(model_object->instances.begin(), model_object->instances.end(),
+                    [&instance](const ModelInstance *mi) { return mi->id() == instance.instance_id; });
+                assert(it != model_object->instances.end());
+                int instance_idx = it - model_object->instances.begin();
+                for (size_t istep = 0; istep < sla_steps.size(); ++istep) {
+                    if (state.step[istep].state == PrintStateBase::State::Done) {
+                        // Check whether there is an existing auxiliary volume to be updated, or a new auxiliary volume to be created.
+                        ModelVolumeState key(state.step[istep].timestamp, instance.instance_id.id);
+                        auto it = std::lower_bound(aux_volume_state.begin(), aux_volume_state.end(), key, model_volume_state_lower);
+                        assert(it != aux_volume_state.end() && it->geometry_id == key.geometry_id);
+                        if (it->new_geometry()) {
+                            // This can be an SLA support structure that should not be rendered (in case someone used undo
+                            // to revert to before it was generated). If that's the case, we should not generate anything.
+                            if (model_object->sla_points_status != sla::PointsStatus::NoPoints)
+                                instances[istep].emplace_back(std::pair<size_t, size_t>(instance_idx, print_instance_idx));
+                            else
+                                shift_zs[object_idx] = 0.;
+                        }
+                        else {
+                            // Recycling an old GLVolume. Update the Object/Instance indices into the current Model.
+                            m_volumes.volumes[it->volume_idx]->composite_id = GLVolume::CompositeID(object_idx, m_volumes.volumes[it->volume_idx]->volume_idx(), instance_idx);
+                            m_volumes.volumes[it->volume_idx]->set_instance_transformation(model_object->instances[instance_idx]->get_transformation());
+                        }
+                    }
+                }
+            }
+
+            for (size_t istep = 0; istep < sla_steps.size(); ++istep) {
+                if (!instances[istep].empty())
+                    m_volumes.load_object_auxiliary(print_object, object_idx, instances[istep], sla_steps[istep], state.step[istep].timestamp);
+            }
+        }
+
+        // Shift-up all volumes of the object so that it has the right elevation with respect to the print bed
+        for (GLVolume* volume : m_volumes.volumes) {
+            const ModelObject* model_object = (volume->object_idx() < (int)m_model->objects.size()) ? m_model->objects[volume->object_idx()] : nullptr;
+            if (model_object != nullptr && model_object->instances[volume->instance_idx()]->is_printable()) {
+                const SLAPrintObject* po = sla_print->get_print_object_by_model_object_id(model_object->id());
+                if (po != nullptr)
+                    volume->set_sla_shift_z(po->get_current_elevation() / sla_print->relative_correction().z());
+            }
+        }
+    }
+
     if (printer_technology == ptFFF && m_config->has("nozzle_diameter")) {
         // Should the wipe tower be visualized ?
         unsigned int extruders_count = (unsigned int)dynamic_cast<const ConfigOptionFloats*>(m_config->option("nozzle_diameter"))->values.size();
@@ -2032,17 +2141,18 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
             const float w = dynamic_cast<const ConfigOptionFloat*>(m_config->option("wipe_tower_width"))->value;
             const float a = dynamic_cast<const ConfigOptionFloat*>(m_config->option("wipe_tower_rotation_angle"))->value;
             const float bw = dynamic_cast<const ConfigOptionFloat*>(m_config->option("wipe_tower_brim_width"))->value;
+            const float ca = dynamic_cast<const ConfigOptionFloat*>(m_config->option("wipe_tower_cone_angle"))->value;
 
             const Print *print = m_process->fff_print();
             const float depth = print->wipe_tower_data(extruders_count).depth;
 
 #if ENABLE_OPENGL_ES
             int volume_idx_wipe_tower_new = m_volumes.load_wipe_tower_preview(
-                x, y, w, depth, (float)height, a, !print->is_step_done(psWipeTower),
+                x, y, w, depth, (float)height, ca, a, !print->is_step_done(psWipeTower),
                 bw, &m_wipe_tower_mesh);
 #else
             int volume_idx_wipe_tower_new = m_volumes.load_wipe_tower_preview(
-                x, y, w, depth, (float)height, a, !print->is_step_done(psWipeTower),
+                x, y, w, depth, (float)height, ca, a, !print->is_step_done(psWipeTower),
                 bw);
 #endif // ENABLE_OPENGL_ES
             if (volume_idx_wipe_tower_old != -1)
@@ -2347,15 +2457,6 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
 #endif /* __APPLE__ */
             post_event(SimpleEvent(EVT_GLTOOLBAR_COPY));
         break;
-#ifdef __APPLE__
-        case 'd':
-        case 'D':
-#else /* __APPLE__ */
-        case WXK_CONTROL_D:
-#endif /* __APPLE__ */
-            m_bed.toggle_show_axes();
-            m_dirty = true;
-            break;
 #ifdef __APPLE__
         case 'f':
         case 'F':
@@ -3484,6 +3585,9 @@ void GLCanvas3D::do_move(const std::string& snapshot_type)
         int instance_idx = v->instance_idx();
         int volume_idx = v->volume_idx();
 
+        if (volume_idx < 0)
+            continue;
+
         std::pair<int, int> done_id(object_idx, instance_idx);
 
         if (0 <= object_idx && object_idx < (int)m_model->objects.size()) {
@@ -3494,7 +3598,7 @@ void GLCanvas3D::do_move(const std::string& snapshot_type)
             if (model_object != nullptr) {
                 if (selection_mode == Selection::Instance)
                     model_object->instances[instance_idx]->set_transformation(v->get_instance_transformation());
-                else if (volume_idx >= 0 && selection_mode == Selection::Volume)
+                else if (selection_mode == Selection::Volume)
                     model_object->volumes[volume_idx]->set_transformation(v->get_volume_transformation());
 
                 object_moved = true;
@@ -3577,6 +3681,9 @@ void GLCanvas3D::do_rotate(const std::string& snapshot_type)
         const int instance_idx = v->instance_idx();
         const int volume_idx = v->volume_idx();
 
+        if (volume_idx < 0)
+            continue;
+
         done.insert(std::pair<int, int>(object_idx, instance_idx));
 
         // Rotate instances/volumes.
@@ -3641,6 +3748,9 @@ void GLCanvas3D::do_scale(const std::string& snapshot_type)
         const int instance_idx = v->instance_idx();
         const int volume_idx = v->volume_idx();
 
+        if (volume_idx < 0)
+            continue;
+
         done.insert(std::pair<int, int>(object_idx, instance_idx));
 
         // Rotate instances/volumes
@@ -3648,7 +3758,7 @@ void GLCanvas3D::do_scale(const std::string& snapshot_type)
         if (model_object != nullptr) {
             if (selection_mode == Selection::Instance)
                 model_object->instances[instance_idx]->set_transformation(v->get_instance_transformation());
-            else if (selection_mode == Selection::Volume && volume_idx >= 0) {
+            else if (selection_mode == Selection::Volume) {
                 model_object->instances[instance_idx]->set_transformation(v->get_instance_transformation());
                 model_object->volumes[volume_idx]->set_transformation(v->get_volume_transformation());
             }
@@ -4357,7 +4467,7 @@ void GLCanvas3D::_render_thumbnail_internal(ThumbnailData& thumbnail_data, const
     glsafe(::glDisable(GL_DEPTH_TEST));
 
     if (thumbnail_params.show_bed)
-        _render_bed(view_matrix, projection_matrix, !camera.is_looking_downward(), false);
+        _render_bed(view_matrix, projection_matrix, !camera.is_looking_downward());
 
     // restore background color
     if (thumbnail_params.transparent_background)
@@ -4643,7 +4753,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "add";
     item.icon_filename = "add.svg";
-    item.tooltip = _utf8(L("Add...")) + " [" + GUI::shortkey_ctrl_prefix() + "I]";
+    item.tooltip = _u8L("Add...") + " [" + GUI::shortkey_ctrl_prefix() + "I]";
     item.sprite_id = 0;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_ADD)); };
     if (!m_main_toolbar.add_item(item))
@@ -4651,7 +4761,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "delete";
     item.icon_filename = "remove.svg";
-    item.tooltip = _utf8(L("Delete")) + " [Del]";
+    item.tooltip = _u8L("Delete") + " [Del]";
     item.sprite_id = 1;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_DELETE)); };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_delete(); };
@@ -4660,7 +4770,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "deleteall";
     item.icon_filename = "delete_all.svg";
-    item.tooltip = _utf8(L("Delete all")) + " [" + GUI::shortkey_ctrl_prefix() + "Del]";
+    item.tooltip = _u8L("Delete all") + " [" + GUI::shortkey_ctrl_prefix() + "Del]";
     item.sprite_id = 2;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_DELETE_ALL)); };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_delete_all(); };
@@ -4669,7 +4779,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "arrange";
     item.icon_filename = "arrange.svg";
-    item.tooltip = _utf8(L("Arrange")) + " [A]\n" + _utf8(L("Arrange selection")) + " [Shift+A]\n" + _utf8(L("Click right mouse button to show arrangement options"));
+    item.tooltip = _u8L("Arrange") + " [A]\n" + _u8L("Arrange selection") + " [Shift+A]\n" + _u8L("Click right mouse button to show arrangement options");
     item.sprite_id = 3;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_ARRANGE)); };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_arrange(); };
@@ -4689,7 +4799,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "copy";
     item.icon_filename = "copy.svg";
-    item.tooltip = _utf8(L("Copy")) + " [" + GUI::shortkey_ctrl_prefix() + "C]";
+    item.tooltip = _u8L("Copy") + " [" + GUI::shortkey_ctrl_prefix() + "C]";
     item.sprite_id = 4;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_COPY)); };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_copy_to_clipboard(); };
@@ -4698,7 +4808,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "paste";
     item.icon_filename = "paste.svg";
-    item.tooltip = _utf8(L("Paste")) + " [" + GUI::shortkey_ctrl_prefix() + "V]";
+    item.tooltip = _u8L("Paste") + " [" + GUI::shortkey_ctrl_prefix() + "V]";
     item.sprite_id = 5;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_PASTE)); };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_paste_from_clipboard(); };
@@ -4710,7 +4820,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "more";
     item.icon_filename = "instance_add.svg";
-    item.tooltip = _utf8(L("Add instance")) + " [+]";
+    item.tooltip = _u8L("Add instance") + " [+]";
     item.sprite_id = 6;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_MORE)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -4721,7 +4831,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "fewer";
     item.icon_filename = "instance_remove.svg";
-    item.tooltip = _utf8(L("Remove instance")) + " [-]";
+    item.tooltip = _u8L("Remove instance") + " [-]";
     item.sprite_id = 7;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_FEWER)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -4734,7 +4844,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "splitobjects";
     item.icon_filename = "split_objects.svg";
-    item.tooltip = _utf8(L("Split to objects"));
+    item.tooltip = _u8L("Split to objects");
     item.sprite_id = 8;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_SPLIT_OBJECTS)); };
     item.visibility_callback = GLToolbarItem::Default_Visibility_Callback;
@@ -4744,7 +4854,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "splitvolumes";
     item.icon_filename = "split_parts.svg";
-    item.tooltip = _utf8(L("Split to parts"));
+    item.tooltip = _u8L("Split to parts");
     item.sprite_id = 9;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_SPLIT_VOLUMES)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -4758,8 +4868,8 @@ bool GLCanvas3D::_init_main_toolbar()
     item.name = "settings";
     item.icon_filename = "settings.svg";
     item.tooltip = _u8L("Switch to Settings") + "\n" + "[" + GUI::shortkey_ctrl_prefix() + "2] - " + _u8L("Print Settings Tab")    + 
-                                                "\n" + "[" + GUI::shortkey_ctrl_prefix() + "3] - " + (current_printer_technology() == ptFFF ? _u8L("Filament Settings Tab") : _u8L("Material Settings Tab")) +
+                                                "\n" + "[" + GUI::shortkey_ctrl_prefix() + "3] - " + (current_printer_technology() == ptFFF ? _u8L("Filament Settings Tab") : _u8L("Material Settings Tab") +
-                                                "\n" + "[" + GUI::shortkey_ctrl_prefix() + "4] - " + _u8L("Printer Settings Tab") ;
+                                                "\n" + "[" + GUI::shortkey_ctrl_prefix() + "4] - " + _u8L("Printer Settings Tab")) ;
     item.sprite_id = 10;
     item.enabling_callback    = GLToolbarItem::Default_Enabling_Callback;
     item.visibility_callback  = []() { return wxGetApp().app_config->get_bool("new_settings_layout_mode") ||
@@ -4775,7 +4885,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "search";
     item.icon_filename = "search_.svg";
-    item.tooltip = _utf8(L("Search")) + " [" + GUI::shortkey_ctrl_prefix() + "F]";
+    item.tooltip = _u8L("Search") + " [" + GUI::shortkey_ctrl_prefix() + "F]";
     item.sprite_id = 11;
     item.left.toggable = true;
     item.left.render_callback = [this](float left, float right, float, float) {
@@ -4797,7 +4907,7 @@ bool GLCanvas3D::_init_main_toolbar()
 
     item.name = "layersediting";
     item.icon_filename = "layers_white.svg";
-    item.tooltip = _utf8(L("Variable layer height"));
+    item.tooltip = _u8L("Variable layer height");
     item.sprite_id = 12;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_LAYERSEDITING)); };
     item.visibility_callback = [this]()->bool {
@@ -4850,7 +4960,7 @@ bool GLCanvas3D::_init_undoredo_toolbar()
 
     item.name = "undo";
     item.icon_filename = "undo_toolbar.svg";
-    item.tooltip = _utf8(L("Undo")) + " [" + GUI::shortkey_ctrl_prefix() + "Z]\n" + _utf8(L("Click right mouse button to open/close History"));
+    item.tooltip = _u8L("Undo") + " [" + GUI::shortkey_ctrl_prefix() + "Z]\n" + _u8L("Click right mouse button to open/close History");
     item.sprite_id = 0;
     item.left.action_callback = [this]() { post_event(SimpleEvent(EVT_GLCANVAS_UNDO)); };
     item.right.toggable = true;
@@ -4872,7 +4982,7 @@ bool GLCanvas3D::_init_undoredo_toolbar()
         if (can_undo) {
         	std::string action;
             wxGetApp().plater()->undo_redo_topmost_string_getter(true, action);
-            new_additional_tooltip = (boost::format(_utf8(L("Next Undo action: %1%"))) % action).str();
+            new_additional_tooltip = format(_L("Next Undo action: %1%"), action);
         }
 
         if (new_additional_tooltip != curr_additional_tooltip) {
@@ -4887,7 +4997,7 @@ bool GLCanvas3D::_init_undoredo_toolbar()
 
     item.name = "redo";
     item.icon_filename = "redo_toolbar.svg";
-    item.tooltip = _utf8(L("Redo")) + " [" + GUI::shortkey_ctrl_prefix() + "Y]\n" + _utf8(L("Click right mouse button to open/close History"));
+    item.tooltip = _u8L("Redo") + " [" + GUI::shortkey_ctrl_prefix() + "Y]\n" + _u8L("Click right mouse button to open/close History");
     item.sprite_id = 1;
     item.left.action_callback = [this]() { post_event(SimpleEvent(EVT_GLCANVAS_REDO)); };
     item.right.action_callback = [this]() { m_imgui_undo_redo_hovered_pos = -1; };
@@ -4908,7 +5018,7 @@ bool GLCanvas3D::_init_undoredo_toolbar()
         if (can_redo) {
         	std::string action;
             wxGetApp().plater()->undo_redo_topmost_string_getter(false, action);
-            new_additional_tooltip = (boost::format(_utf8(L("Next Redo action: %1%"))) % action).str();
+            new_additional_tooltip = format(_L("Next Redo action: %1%"), action);
         }
 
         if (new_additional_tooltip != curr_additional_tooltip) {
@@ -5411,7 +5521,7 @@ void GLCanvas3D::_render_background()
     glsafe(::glEnable(GL_DEPTH_TEST));
 }
 
-void GLCanvas3D::_render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool show_axes)
+void GLCanvas3D::_render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom)
 {
     float scale_factor = 1.0;
 #if ENABLE_RETINA_GL
@@ -5425,7 +5535,12 @@ void GLCanvas3D::_render_bed(const Transform3d& view_matrix, const Transform3d&
           && m_gizmos.get_current_type() != GLGizmosManager::Seam
           && m_gizmos.get_current_type() != GLGizmosManager::MmuSegmentation);
 
-    m_bed.render(*this, view_matrix, projection_matrix, bottom, scale_factor, show_axes, show_texture);
+    m_bed.render(*this, view_matrix, projection_matrix, bottom, scale_factor, show_texture);
+}
+
+void GLCanvas3D::_render_bed_axes()
+{
+  m_bed.render_axes();
 }
 
 void GLCanvas3D::_render_bed_for_picking(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom)
@@ -6725,9 +6840,9 @@ void GLCanvas3D::_load_sla_shells()
     // adds objects' volumes 
     for (const SLAPrintObject* obj : print->objects()) {
         unsigned int initial_volumes_count = (unsigned int)m_volumes.volumes.size();
-        for (const SLAPrintObject::Instance& instance : obj->instances()) {
         std::shared_ptr<const indexed_triangle_set> m = obj->get_mesh_to_print();
         if (m && !m->empty()) {
+            for (const SLAPrintObject::Instance& instance : obj->instances()) {
                 add_volume(*obj, 0, instance, *m, GLVolume::MODEL_COLOR[0], true);
                 // Set the extruder_id and volume_id to achieve the same color as in the 3D scene when
                 // through the update_volumes_colors_by_extruder() call.
@@ -6738,7 +6853,7 @@ void GLCanvas3D::_load_sla_shells()
                     add_volume(*obj, -int(slaposPad), instance, pad_mesh, GLVolume::SLA_PAD_COLOR, false);
             }
         }
-        double shift_z = obj->get_current_elevation();
+        const double shift_z = obj->get_current_elevation();
         for (unsigned int i = initial_volumes_count; i < m_volumes.volumes.size(); ++ i) {
             // apply shift z
             m_volumes.volumes[i]->set_sla_shift_z(shift_z);
@@ -7146,5 +7261,95 @@ const ModelVolume *get_model_volume(const GLVolume &v, const Model &model)
     return ret;
 }
 
+const ModelVolume *get_model_volume(const ObjectID &volume_id, const ModelObjectPtrs &objects)
+{
+    for (const ModelObject *obj : objects)
+        for (const ModelVolume *vol : obj->volumes)
+            if (vol->id() == volume_id)
+                return vol;
+    return nullptr;
+}
+
+ModelVolume *get_model_volume(const GLVolume &v, const ModelObject& object) {
+    if (v.volume_idx() < 0)
+        return nullptr;
+
+    size_t volume_idx = static_cast<size_t>(v.volume_idx());
+    if (volume_idx >= object.volumes.size())
+        return nullptr;
+
+    return object.volumes[volume_idx];
+}
+
+ModelVolume *get_model_volume(const GLVolume &v, const ModelObjectPtrs &objects)
+{
+    if (v.object_idx() < 0)
+        return nullptr;
+    size_t objext_idx = static_cast<size_t>(v.object_idx());
+    if (objext_idx >= objects.size())
+        return nullptr;
+    if (objects[objext_idx] == nullptr)
+        return nullptr;
+    return get_model_volume(v, *objects[objext_idx]);
+}
+
+GLVolume *get_first_hovered_gl_volume(const GLCanvas3D &canvas) {
+    int hovered_id_signed = canvas.get_first_hover_volume_idx();
+    if (hovered_id_signed < 0)
+        return nullptr;
+
+    size_t hovered_id = static_cast<size_t>(hovered_id_signed);
+    const GLVolumePtrs &volumes = canvas.get_volumes().volumes;
+    if (hovered_id >= volumes.size())
+        return nullptr;
+
+    return volumes[hovered_id];
+}
+
+GLVolume *get_selected_gl_volume(const GLCanvas3D &canvas) {
+    const GLVolume *gl_volume = get_selected_gl_volume(canvas.get_selection());
+    if (gl_volume == nullptr)
+        return nullptr;
+
+    const GLVolumePtrs &gl_volumes = canvas.get_volumes().volumes;
+    for (GLVolume *v : gl_volumes)
+        if (v->composite_id == gl_volume->composite_id)
+            return v;
+    return nullptr;
+}
+
+ModelObject *get_model_object(const GLVolume &gl_volume, const Model &model) {
+    return get_model_object(gl_volume, model.objects);
+}
+
+ModelObject *get_model_object(const GLVolume &gl_volume, const ModelObjectPtrs &objects) {
+    if (gl_volume.object_idx() < 0)
+        return nullptr;
+    size_t objext_idx = static_cast<size_t>(gl_volume.object_idx());
+    if (objext_idx >= objects.size())
+        return nullptr;
+    return objects[objext_idx];
+}
+
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const Model& model) {
+    return get_model_instance(gl_volume, model.objects);
+}
+
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const ModelObjectPtrs &objects) {
+    if (gl_volume.instance_idx() < 0)
+        return nullptr;
+    ModelObject *object = get_model_object(gl_volume, objects);
+    return get_model_instance(gl_volume, *object);
+}
+
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const ModelObject &object) {
+    if (gl_volume.instance_idx() < 0)
+        return nullptr;
+    size_t instance_idx = static_cast<size_t>(gl_volume.instance_idx());
+    if (instance_idx >= object.instances.size())
+        return nullptr;
+    return object.instances[instance_idx];
+}
+
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/GLCanvas3D.hpp

@@ -976,7 +976,8 @@ private:
     void _picking_pass();
     void _rectangular_selection_picking_pass();
     void _render_background();
-    void _render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool show_axes);
+    void _render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom);
+    void _render_bed_axes();
     void _render_bed_for_picking(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom);
     void _render_objects(GLVolumeCollection::ERenderType type);
     void _render_gcode();
@@ -1058,7 +1059,20 @@ private:
     float get_overlay_window_width() { return LayersEditing::get_overlay_window_width(); }
 };
 
-const ModelVolume * get_model_volume(const GLVolume &v, const Model &model);
+const ModelVolume *get_model_volume(const GLVolume &v, const Model &model);
+const ModelVolume *get_model_volume(const ObjectID &volume_id, const ModelObjectPtrs &objects);
+ModelVolume *get_model_volume(const GLVolume &v, const ModelObjectPtrs &objects);
+ModelVolume *get_model_volume(const GLVolume &v, const ModelObject &object);
+
+GLVolume *get_first_hovered_gl_volume(const GLCanvas3D &canvas);
+GLVolume *get_selected_gl_volume(const GLCanvas3D &canvas);
+
+ModelObject *get_model_object(const GLVolume &gl_volume, const Model &model);
+ModelObject *get_model_object(const GLVolume &gl_volume, const ModelObjectPtrs &objects);
+
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const Model &model);
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const ModelObjectPtrs &objects);
+ModelInstance *get_model_instance(const GLVolume &gl_volume, const ModelObject &object);
 
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/GUI_App.cpp

@@ -5,7 +5,15 @@
 #include "GUI_ObjectManipulation.hpp"
 #include "GUI_Factories.hpp"
 #include "format.hpp"
-#include "I18N.hpp"
+
+// Localization headers: include libslic3r version first so everything in this file
+// uses the slic3r/GUI version (the macros will take precedence over the functions).
+// Also, there is a check that the former is not included from slic3r module.
+// This is the only place where we want to allow that, so define an override macro.
+#define SLIC3R_ALLOW_LIBSLIC3R_I18N_IN_SLIC3R
+#include "libslic3r/I18N.hpp"
+#undef SLIC3R_ALLOW_LIBSLIC3R_I18N_IN_SLIC3R
+#include "slic3r/GUI/I18N.hpp"
 
 #include <algorithm>
 #include <iterator>
@@ -44,7 +52,6 @@
 
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/Model.hpp"
-#include "libslic3r/I18N.hpp"
 #include "libslic3r/PresetBundle.hpp"
 #include "libslic3r/Color.hpp"
 
@@ -1315,7 +1322,7 @@ bool GUI_App::on_init_inner()
     if (!delayed_error_load_presets.empty())
         show_error(nullptr, delayed_error_load_presets);
 
-    mainframe = new MainFrame();
+    mainframe = new MainFrame(app_config->has("font_size") ? atoi(app_config->get("font_size").c_str()) : -1);
     // hide settings tabs after first Layout
     if (is_editor())
         mainframe->select_tab(size_t(0));
@@ -1803,7 +1810,7 @@ void GUI_App::recreate_GUI(const wxString& msg_name)
     dlg.Update(10, _L("Recreating") + dots);
 
     MainFrame *old_main_frame = mainframe;
-    mainframe = new MainFrame();
+    mainframe = new MainFrame(app_config->has("font_size") ? atoi(app_config->get("font_size").c_str()) : -1);
     if (is_editor())
         // hide settings tabs after first Layout
         mainframe->select_tab(size_t(0));
@@ -1981,7 +1988,7 @@ void GUI_App::import_model(wxWindow *parent, wxArrayString& input_files) const
 void GUI_App::import_zip(wxWindow* parent, wxString& input_file) const
 {
     wxFileDialog dialog(parent ? parent : GetTopWindow(),
-        _L("Choose ZIP file:"),
+        _L("Choose ZIP file") + ":",
         from_u8(app_config->get_last_dir()), "",
         file_wildcards(FT_ZIP), wxFD_OPEN | wxFD_FILE_MUST_EXIST);
 
@@ -2305,18 +2312,6 @@ bool GUI_App::load_language(wxString language, bool initial)
     // Override language at the active wxTranslations class (which is stored in the active m_wxLocale)
     // to load possibly different dictionary, for example, load Czech dictionary for Slovak language.
     wxTranslations::Get()->SetLanguage(language_dict);
-    {
-        // ysFIXME after fix for wxWidgets issue (https://github.com/wxWidgets/wxWidgets/issues/23210)
-        // UKR Localization specific workaround till the wxWidgets doesn't fixed:
-        // From wxWidgets 3.1.6 calls setlocation(0, wxInfoLanguage->LocaleTag), see (https://github.com/prusa3d/wxWidgets/commit/deef116a09748796711d1e3509965ee208dcdf0b#diff-7de25e9a71c4dce61bbf76492c589623d5b93fd1bb105ceaf0662075d15f4472),
-        // where LocaleTag is a Tag of locale in BCP 47 - like notation.
-        // For Ukrainian Language LocaleTag is "uk".
-        // But setlocale(0, "uk") returns "English_United Kingdom.1252" instead of "uk",
-        // and, as a result, locales are set to English_United Kingdom        
-         
-        if (language_info->CanonicalName == "uk")
-            setlocale(0, language_info->GetCanonicalWithRegion().data());
-    }
     m_wxLocale->AddCatalog(SLIC3R_APP_KEY);
     m_imgui->set_language(into_u8(language_info->CanonicalName));
     //FIXME This is a temporary workaround, the correct solution is to switch to "C" locale during file import / export only.
@@ -2393,8 +2388,8 @@ void GUI_App::add_config_menu(wxMenuBar *menu)
     auto local_menu = new wxMenu();
     wxWindowID config_id_base = wxWindow::NewControlId(int(ConfigMenuCnt));
 
-    const auto config_wizard_name = _(ConfigWizard::name(true));
+    const wxString config_wizard_name = _(ConfigWizard::name(true));
-    const auto config_wizard_tooltip = from_u8((boost::format(_utf8(L("Run %s"))) % config_wizard_name).str());
+    const wxString config_wizard_tooltip = from_u8((boost::format(_u8L("Run %s")) % config_wizard_name).str());
     // Cmd+, is standard on OS X - what about other operating systems?
     if (is_editor()) {
         local_menu->Append(config_id_base + ConfigMenuWizard, config_wizard_name + dots, config_wizard_tooltip);
@@ -2421,7 +2416,7 @@ void GUI_App::add_config_menu(wxMenuBar *menu)
         mode_menu = new wxMenu();
         mode_menu->AppendRadioItem(config_id_base + ConfigMenuModeSimple, _L("Simple"), _L("Simple View Mode"));
 //    mode_menu->AppendRadioItem(config_id_base + ConfigMenuModeAdvanced, _L("Advanced"), _L("Advanced View Mode"));
-        mode_menu->AppendRadioItem(config_id_base + ConfigMenuModeAdvanced, _CTX(L_CONTEXT("Advanced", "Mode"), "Mode"), _L("Advanced View Mode"));
+        mode_menu->AppendRadioItem(config_id_base + ConfigMenuModeAdvanced, _CTX("Advanced", "Mode"), _L("Advanced View Mode"));
         mode_menu->AppendRadioItem(config_id_base + ConfigMenuModeExpert, _L("Expert"), _L("Expert View Mode"));
         Bind(wxEVT_UPDATE_UI, [this](wxUpdateUIEvent& evt) { if (get_mode() == comSimple) evt.Check(true); }, config_id_base + ConfigMenuModeSimple);
         Bind(wxEVT_UPDATE_UI, [this](wxUpdateUIEvent& evt) { if (get_mode() == comAdvanced) evt.Check(true); }, config_id_base + ConfigMenuModeAdvanced);
@@ -3445,7 +3440,7 @@ void GUI_App::app_updater(bool from_user)
     }
     app_data.target_path =dwnld_dlg.get_download_path();
     // start download
-    this->plater_->get_notification_manager()->push_download_progress_notification(GUI::format(_utf8("Downloading %1%"), app_data.target_path.filename().string()), std::bind(&AppUpdater::cancel_callback, this->m_app_updater.get()));
+    this->plater_->get_notification_manager()->push_download_progress_notification(GUI::format(_L("Downloading %1%"), app_data.target_path.filename().string()), std::bind(&AppUpdater::cancel_callback, this->m_app_updater.get()));
     app_data.start_after = dwnld_dlg.run_after_download();
     m_app_updater->set_app_data(std::move(app_data));
     m_app_updater->sync_download();
@@ -3473,7 +3468,7 @@ void GUI_App::start_download(std::string url)
     //lets always init so if the download dest folder was changed, new dest is used 
         boost::filesystem::path dest_folder(app_config->get("url_downloader_dest"));
         if (dest_folder.empty() || !boost::filesystem::is_directory(dest_folder)) {
-            std::string msg = _utf8("Could not start URL download. Destination folder is not set. Please choose destination folder in Configuration Wizard.");
+            std::string msg = _u8L("Could not start URL download. Destination folder is not set. Please choose destination folder in Configuration Wizard.");
             BOOST_LOG_TRIVIAL(error) << msg;
             show_error(nullptr, msg);
             return;

src/slic3r/GUI/GUI_Factories.cpp

@@ -411,7 +411,7 @@ static void create_freq_settings_popupmenu(wxMenu* menu, const bool is_object_se
         if (is_improper_category(category.first, extruders_cnt))
             continue;
 
-        append_menu_item(menu, wxID_ANY, from_u8((boost::format(_utf8(L("Quick Add Settings (%s)"))) % _(it.first)).str()), "",
+        append_menu_item(menu, wxID_ANY, format_wxstr(_L("Quick Add Settings (%s)"), _(it.first)), "",
             [menu, item, is_object_settings, bundle](wxCommandEvent& event) {
                 wxString category_name = menu->GetLabel(event.GetId());
                 std::vector<std::string> options;
@@ -622,13 +622,13 @@ wxMenuItem* MenuFactory::append_menu_item_settings(wxMenu* menu_)
 #if 0
     for (auto& it : m_freq_settings_fff)
     {
-        settings_id = menu->FindItem(from_u8((boost::format(_utf8(L("Quick Add Settings (%s)"))) % _(it.first)).str()));
+        settings_id = menu->FindItem(format_wxstr(_L("Quick Add Settings (%s)"), _(it.first)));
         if (settings_id != wxNOT_FOUND)
             menu->Destroy(settings_id);
     }
     for (auto& it : m_freq_settings_sla)
     {
-        settings_id = menu->FindItem(from_u8((boost::format(_utf8(L("Quick Add Settings (%s)"))) % _(it.first)).str()));
+        settings_id = menu->FindItem(format_wxstr(_L("Quick Add Settings (%s)"), _(it.first)));
         if (settings_id != wxNOT_FOUND)
             menu->Destroy(settings_id);
     }
@@ -1000,7 +1000,7 @@ void MenuFactory::append_menu_item_edit_text(wxMenu *menu)
     std::string icon = "";
     append_menu_item(
         menu, wxID_ANY, name, description,
-        [can_edit_text](wxCommandEvent &) {
+        [](wxCommandEvent &) {
             plater()->canvas3D()->get_gizmos_manager().open_gizmo(GLGizmosManager::Emboss);
         },
         icon, nullptr, can_edit_text, m_parent);

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -420,7 +420,7 @@ MeshErrorsInfo ObjectList::get_mesh_errors_info(const int obj_idx, const int vol
     const ModelObject* object = (*m_objects)[obj_idx];
     if (vol_idx != -1 && vol_idx >= int(object->volumes.size())) {
         if (sidebar_info)
-            *sidebar_info = _L("Wrong volume index ");
+            *sidebar_info = _L("Wrong volume index") + " ";
         return { {}, {} }; // hide tooltip
     }
 
@@ -2043,9 +2043,8 @@ bool ObjectList::del_from_cut_object(bool is_cut_connector, bool is_model_part/*
 
     InfoDialog dialog(wxGetApp().plater(), title,
                       _L("This action will break a cut information.\n"
-                         "After that PrusaSlicer can't guarantee model consistency.\n"
+                         "After that PrusaSlicer can't guarantee model consistency.") + "\n\n" +
-                         "\n"
+                      _L("To manipulate with solid parts or negative volumes you have to invalidate cut infornation first." + msg_end ),
-                         "To manipulate with solid parts or negative volumes you have to invalidate cut infornation first." + msg_end ),
                       false, buttons_style | wxCANCEL_DEFAULT | wxICON_WARNING);
 
     dialog.SetButtonLabel(wxID_YES, _L("Invalidate cut info"));
@@ -2924,6 +2923,16 @@ void ObjectList::update_info_items(size_t obj_idx, wxDataViewItemArray* selectio
     if (obj_idx >= m_objects->size())
         return;
 
+    wxDataViewItemArray sels;
+    if (!selections) {
+        GetSelections(sels);
+        for (wxDataViewItem item : sels)
+            if (item.IsOk() && m_objects_model->GetItemType(item) == itVolume) {
+                selections = &sels;
+                break;
+            }
+    }
+
     const ModelObject* model_object = (*m_objects)[obj_idx];
     wxDataViewItem item_obj = m_objects_model->GetItemById(obj_idx);
     assert(item_obj.IsOk());

src/slic3r/GUI/GUI_ObjectManipulation.cpp

@@ -1,5 +1,6 @@
 #include "GUI_ObjectManipulation.hpp"
 #include "I18N.hpp"
+#include "format.hpp"
 #include "BitmapComboBox.hpp"
 
 #include "GLCanvas3D.hpp"
@@ -245,8 +246,7 @@ ObjectManipulation::ObjectManipulation(wxWindow* parent) :
 
         // We will add a button to toggle mirroring to each axis:
         auto btn = new ScalableButton(parent, wxID_ANY, "mirroring_off", wxEmptyString, wxDefaultSize, wxDefaultPosition, wxBU_EXACTFIT | wxNO_BORDER | wxTRANSPARENT_WINDOW);
-        btn->SetToolTip(_L("Mirror along") + wxString::Format(_L(" %c "), (int)label) + _L("axis"));
+        btn->SetToolTip(format_wxstr(_L("Mirror along %1% axis"), label));
-
         m_mirror_buttons[axis_idx] = btn;
 
         sizer->AddStretchSpacer(2);
@@ -596,6 +596,12 @@ void ObjectManipulation::update_ui_from_settings()
 
 void ObjectManipulation::update_settings_value(const Selection& selection)
 {
+    if (selection.is_empty()) {
+        // No selection, reset the cache.
+        reset_settings_value();
+        return;
+    }
+
     m_new_move_label_string   = L("Position");
     m_new_rotate_label_string = L("Rotation");
     m_new_scale_label_string  = L("Scale factors");
@@ -674,11 +680,6 @@ void ObjectManipulation::update_settings_value(const Selection& selection)
         m_new_size = selection.get_bounding_box_in_current_reference_system().first.size();
         m_new_enabled  = true;
     }
-    else {
-        // No selection, reset the cache.
-//		assert(selection.is_empty());
-        reset_settings_value();
-    }
 }
 
 void ObjectManipulation::update_if_dirty()
@@ -1066,8 +1067,9 @@ void ObjectManipulation::on_change(const std::string& opt_key, int axis, double
         if (new_value > 0.0)
             change_size_value(axis, new_value);
         else {
-            new_value = m_cache.size(axis);
+            Vec3d& size = m_imperial_units ? m_cache.size_inches : m_cache.size;
-            m_cache.size(axis) = 0.0;
+            new_value = size(axis);
+            size(axis) = 0.0;
             m_cache.size_rounded(axis) = DBL_MAX;
             change_size_value(axis, new_value);
         }

src/slic3r/GUI/GUI_ObjectSettings.cpp

@@ -12,6 +12,7 @@
 #include <boost/algorithm/string.hpp>
 
 #include "I18N.hpp"
+#include "format.hpp"
 #include "ConfigManipulation.hpp"
 
 #include <wx/wupdlock.h>
@@ -102,7 +103,7 @@ bool ObjectSettings::update_settings_list()
             btn->SetBitmapCurrent(m_bmp_delete_focus.bmp());
 
 			btn->Bind(wxEVT_BUTTON, [opt_key, config, this](wxEvent &event) {
-                wxGetApp().plater()->take_snapshot(from_u8((boost::format(_utf8(L("Delete Option %s"))) % opt_key).str()));
+                wxGetApp().plater()->take_snapshot(format_wxstr(_L("Delete Option %s"), opt_key));
 				config->erase(opt_key);
                 wxGetApp().obj_list()->changed_object();
                 wxTheApp->CallAfter([this]() {
@@ -151,7 +152,7 @@ bool ObjectSettings::update_settings_list()
             for (auto& opt : cat.second)
                 optgroup->get_field(opt)->m_on_change = [optgroup](const std::string& opt_id, const boost::any& value) {
                     // first of all take a snapshot and then change value in configuration
-                    wxGetApp().plater()->take_snapshot(from_u8((boost::format(_utf8(L("Change Option %s"))) % opt_id).str()));
+                    wxGetApp().plater()->take_snapshot(format_wxstr(_L("Change Option %s"), opt_id));
                     optgroup->on_change_OG(opt_id, value);
                 };
 

src/slic3r/GUI/GUI_Preview.cpp

@@ -65,6 +65,7 @@ bool View3D::init(wxWindow* parent, Bed3D& bed, Model* model, DynamicPrintConfig
     m_canvas->allow_multisample(OpenGLManager::can_multisample());
 
     m_canvas->enable_picking(true);
+    m_canvas->get_selection().set_mode(Selection::Instance);
     m_canvas->enable_moving(true);
     // XXX: more config from 3D.pm
     m_canvas->set_model(model);