Allow to set specific extruder for the wipe tower (first part)

src/libslic3r/GCode/ToolOrdering.cpp

@@ -168,6 +168,11 @@ ToolOrdering::ToolOrdering(const Print &print, unsigned int first_extruder, bool
 
     this->fill_wipe_tower_partitions(print.config(), object_bottom_z, max_layer_height);
 
+    if (this->insert_wipe_tower_extruder()) {
+        this->reorder_extruders(first_extruder);
+        this->fill_wipe_tower_partitions(print.config(), object_bottom_z, max_layer_height);
+    }
+
     this->collect_extruder_statistics(prime_multi_material);
 
     this->mark_skirt_layers(print.config(), max_layer_height);
@@ -462,6 +467,27 @@ void ToolOrdering::fill_wipe_tower_partitions(const PrintConfig &config, coordf_
         }
 }
 
+bool ToolOrdering::insert_wipe_tower_extruder()
+{
+    // In case that wipe_tower_extruder is set to non-zero, we must make sure that the extruder will be in the list.
+    bool changed = false;
+    if (m_print_config_ptr->wipe_tower_extruder != 0) {
+        for (LayerTools& lt : m_layer_tools) {
+            if (lt.wipe_tower_partitions > 0) {
+                lt.extruders.emplace_back(m_print_config_ptr->wipe_tower_extruder - 1);
+                sort_remove_duplicates(lt.extruders);
+                changed = true;
+            }
+        }
+        // Now convert the 0-based list to 1-based again.
+        for (LayerTools& lt : m_layer_tools) {
+            for (auto& extruder : lt.extruders)
+                    ++extruder;
+        }
+    }
+    return changed;
+}
+
 void ToolOrdering::collect_extruder_statistics(bool prime_multi_material)
 {
     m_first_printing_extruder = (unsigned int)-1;

src/libslic3r/GCode/ToolOrdering.hpp

@@ -167,6 +167,7 @@ private:
     void 				collect_extruders(const PrintObject &object, const std::vector<std::pair<double, unsigned int>> &per_layer_extruder_switches);
     void				reorder_extruders(unsigned int last_extruder_id);
     void 				fill_wipe_tower_partitions(const PrintConfig &config, coordf_t object_bottom_z, coordf_t max_layer_height);
+    bool                insert_wipe_tower_extruder();
     void                mark_skirt_layers(const PrintConfig &config, coordf_t max_layer_height);
     void 				collect_extruder_statistics(bool prime_multi_material);
 

src/libslic3r/GCode/WipeTower.cpp

@@ -581,7 +581,7 @@ void WipeTower::set_extruder(size_t idx, const PrintConfig& config)
     m_filpar.push_back(FilamentParameters());
 
     m_filpar[idx].material = config.filament_type.get_at(idx);
-    m_filpar[idx].is_soluble = config.filament_soluble.get_at(idx);
+    m_filpar[idx].is_soluble = config.wipe_tower_extruder == 0 ? config.filament_soluble.get_at(idx) : (idx != config.wipe_tower_extruder - 1);
     m_filpar[idx].temperature = config.temperature.get_at(idx);
     m_filpar[idx].first_layer_temperature = config.first_layer_temperature.get_at(idx);
 

src/libslic3r/Preset.cpp

@@ -456,7 +456,7 @@ static std::vector<std::string> s_Preset_print_options {
     "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_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", "wipe_tower_extra_spacing", "compatible_printers", "compatible_printers_condition", "inherits",
+    "wipe_tower_extruder", "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"
 };

src/libslic3r/Print.cpp

@@ -208,6 +208,7 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
             || opt_key == "wipe_tower_bridging"
             || opt_key == "wipe_tower_extra_spacing"
             || opt_key == "wipe_tower_no_sparse_layers"
+            || opt_key == "wipe_tower_extruder"
             || opt_key == "wiping_volumes_matrix"
             || opt_key == "parking_pos_retraction"
             || opt_key == "cooling_tube_retraction"

src/libslic3r/PrintConfig.cpp

@@ -3235,6 +3235,27 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(10.));
 
+    def = this->add("wipe_tower_extruder", coInt);
+    def->label = L("Wipe tower extruder");
+    def->category = L("Extruders");
+    def->tooltip = L("The extruder to use when printing perimeter of the wipe tower. "
+                     "Set to 0 to use the one that is available (non-soluble would be preferred).");
+    def->min = 0;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionInt(0));
+
+    def = this->add("solid_infill_every_layers", coInt);
+    def->label = L("Solid infill every");
+    def->category = L("Infill");
+    def->tooltip = L("This feature allows to force a solid layer every given number of layers. "
+                   "Zero to disable. You can set this to any value (for example 9999); "
+                   "Slic3r will automatically choose the maximum possible number of layers "
+                   "to combine according to nozzle diameter and layer height.");
+    def->sidetext = L("layers");
+    def->min = 0;
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionInt(0));
+
     def = this->add("xy_size_compensation", coFloat);
     def->label = L("XY Size Compensation");
     def->category = L("Advanced");

src/libslic3r/PrintConfig.hpp

@@ -829,6 +829,7 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionFloat,              wipe_tower_cone_angle))
     ((ConfigOptionPercent,            wipe_tower_extra_spacing))
     ((ConfigOptionFloat,              wipe_tower_bridging))
+    ((ConfigOptionInt,                wipe_tower_extruder))
     ((ConfigOptionFloats,             wiping_volumes_matrix))
     ((ConfigOptionFloats,             wiping_volumes_extruders))
     ((ConfigOptionFloat,              z_offset))

src/slic3r/GUI/Plater.cpp

@@ -2007,7 +2007,7 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
     , config(Slic3r::DynamicPrintConfig::new_from_defaults_keys({
         "bed_shape", "bed_custom_texture", "bed_custom_model", "complete_objects", "duplicate_distance", "extruder_clearance_radius", "skirts", "skirt_distance",
         "brim_width", "brim_separation", "brim_type", "variable_layer_height", "nozzle_diameter", "single_extruder_multi_material",
-        "wipe_tower", "wipe_tower_x", "wipe_tower_y", "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_brim_width", "wipe_tower_cone_angle", "wipe_tower_extra_spacing",
+        "wipe_tower", "wipe_tower_x", "wipe_tower_y", "wipe_tower_width", "wipe_tower_rotation_angle", "wipe_tower_brim_width", "wipe_tower_cone_angle", "wipe_tower_extra_spacing", "wipe_tower_extruder",
         "extruder_colour", "filament_colour", "material_colour", "max_print_height", "printer_model", "printer_technology",
         // These values are necessary to construct SlicingParameters by the Canvas3D variable layer height editor.
         "layer_height", "first_layer_height", "min_layer_height", "max_layer_height",

src/slic3r/GUI/Tab.cpp

@@ -1598,6 +1598,7 @@ void TabPrint::build()
         optgroup->append_single_option_line("solid_infill_extruder");
         optgroup->append_single_option_line("support_material_extruder");
         optgroup->append_single_option_line("support_material_interface_extruder");
+        optgroup->append_single_option_line("wipe_tower_extruder");
 
         optgroup = page->new_optgroup(L("Ooze prevention"));
         optgroup->append_single_option_line("ooze_prevention");