Wiping into infill/objects - invalidation of the wipe tower, bugfixes

xs/src/libslic3r/GCode.cpp

@@ -1357,7 +1357,7 @@ void GCode::process_layer(
             m_avoid_crossing_perimeters.disable_once = true;
         }
 
-        if (print.config.wipe_into_infill.value) {
+        {
             gcode += "; INFILL WIPING STARTS\n";
             if (extruder_id != layer_tools.extruders.front()) { // if this is the first extruder on this layer, there was no toolchange
                 for (const auto& layer_to_print : layers) {     // iterate through all objects
@@ -1373,12 +1373,12 @@ void GCode::process_layer(
                             overridden.push_back(new_region);
                             for (ExtrusionEntity *ee : (*layer_to_print.object_layer).regions[region_id]->fills.entities) {
                                 auto *fill = dynamic_cast<ExtrusionEntityCollection*>(ee);
-                                if (fill->get_extruder_override(copy_id) == (unsigned int)extruder_id)
+                                if (fill->get_extruder_override(copy_id) == (int)extruder_id)
                                         overridden.back().infills.append(*fill);
                            }
                            for (ExtrusionEntity *ee : (*layer_to_print.object_layer).regions[region_id]->perimeters.entities) {
                                 auto *fill = dynamic_cast<ExtrusionEntityCollection*>(ee);
-                                if (fill->get_extruder_override(copy_id) == (unsigned int)extruder_id)
+                                if (fill->get_extruder_override(copy_id) == (int)extruder_id)
                                         overridden.back().perimeters.append((*fill).entities);
                            }
                         }
@@ -2527,12 +2527,13 @@ const std::vector<GCode::ObjectByExtruder::Island::Region>& GCode::ObjectByExtru
         by_region_per_copy_cache.push_back(ObjectByExtruder::Island::Region());
         //out.back().perimeters.append(reg.perimeters);       // we will print all perimeters there are
 
-        if (!reg.infills_per_copy_ids.empty()) {
+        if (!reg.infills_per_copy_ids.empty())
             for (unsigned int i=0; i<reg.infills_per_copy_ids[copy].size(); ++i)
                 by_region_per_copy_cache.back().infills.append(*(reg.infills.entities[reg.infills_per_copy_ids[copy][i]]));
+
+        if (!reg.perimeters_per_copy_ids.empty())
             for (unsigned int i=0; i<reg.perimeters_per_copy_ids[copy].size(); ++i)
                 by_region_per_copy_cache.back().perimeters.append(*(reg.perimeters.entities[reg.perimeters_per_copy_ids[copy][i]]));
-        }
     }
     return by_region_per_copy_cache;
 }

xs/src/libslic3r/Print.cpp

@@ -160,6 +160,11 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
     std::vector<PrintStep> steps;
     std::vector<PrintObjectStep> osteps;
     bool invalidated = false;
+
+    // Always invalidate the wipe tower. This is probably necessary because of the wipe_into_infill / wipe_into_objects
+    // features - nearly anything can influence what should (and could) be wiped into.
+    steps.emplace_back(psWipeTower);
+
     for (const t_config_option_key &opt_key : opt_keys) {
         if (steps_ignore.find(opt_key) != steps_ignore.end()) {
             // These options only affect G-code export or they are just notes without influence on the generated G-code,
@@ -201,7 +206,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
             || opt_key == "wipe_tower_rotation_angle"
             || opt_key == "wipe_tower_bridging"
             || opt_key == "wiping_volumes_matrix"
-            || opt_key == "parking_pos_retraction"
+            || opt_key == u8"parking_pos_retraction"
             || opt_key == "cooling_tube_retraction"
             || opt_key == "cooling_tube_length"
             || opt_key == "extra_loading_move"
@@ -216,7 +221,6 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
             osteps.emplace_back(posSupportMaterial);
             steps.emplace_back(psSkirt);
             steps.emplace_back(psBrim);
-            steps.emplace_back(psWipeTower);
         } else {
             // for legacy, if we can't handle this option let's invalidate all steps
             //FIXME invalidate all steps of all objects as well?
@@ -1125,6 +1129,7 @@ void Print::_make_wipe_tower()
     m_wipe_tower_priming = Slic3r::make_unique<WipeTower::ToolChangeResult>(
         wipe_tower.prime(this->skirt_first_layer_height(), m_tool_ordering.all_extruders(), ! last_priming_wipe_full));
 
+    reset_wiping_extrusions(); // if this is not the first time the wipe tower is generated, some extrusions might remember their last wiping status
 
     // Lets go through the wipe tower layers and determine pairs of extruder changes for each
     // to pass to wipe_tower (so that it can use it for planning the layout of the tower)
@@ -1138,8 +1143,8 @@ void Print::_make_wipe_tower()
                 if ((first_layer && extruder_id == m_tool_ordering.all_extruders().back()) || extruder_id != current_extruder_id) {
                     float volume_to_wipe = wipe_volumes[current_extruder_id][extruder_id];    // total volume to wipe after this toolchange
 
-                    if (config.wipe_into_infill && !first_layer)
+                    if (!first_layer)   // unless we're on the first layer, try to assign some infills/objects for the wiping:
-                        volume_to_wipe = mark_wiping_infill(layer_tools, extruder_id, wipe_volumes[current_extruder_id][extruder_id]);
+                        volume_to_wipe = mark_wiping_extrusions(layer_tools, extruder_id, wipe_volumes[current_extruder_id][extruder_id]);
 
                     wipe_tower.plan_toolchange(layer_tools.print_z, layer_tools.wipe_tower_layer_height, current_extruder_id, extruder_id, first_layer && extruder_id == m_tool_ordering.all_extruders().back(), volume_to_wipe);
                     current_extruder_id = extruder_id;
@@ -1176,12 +1181,31 @@ void Print::_make_wipe_tower()
 
 
 
-float Print::mark_wiping_infill(const ToolOrdering::LayerTools& layer_tools, unsigned int new_extruder, float volume_to_wipe)
+void Print::reset_wiping_extrusions() {
+     for (size_t i = 0; i < objects.size(); ++ i) {
+        for (auto& this_layer : objects[i]->layers) {
+            for (size_t region_id = 0; region_id < objects[i]->print()->regions.size(); ++ region_id) {
+                for (unsigned int copy = 0; copy < objects[i]->_shifted_copies.size(); ++copy) {
+                    this_layer->regions[region_id]->fills.set_extruder_override(copy, -1);
+                    this_layer->regions[region_id]->perimeters.set_extruder_override(copy, -1);
+                }
+            }
+        }
+     }
+}
+
+
+
+float Print::mark_wiping_extrusions(const ToolOrdering::LayerTools& layer_tools, unsigned int new_extruder, float volume_to_wipe)
 {
     const float min_infill_volume = 0.f; // ignore infill with smaller volume than this
 
     if (!config.filament_soluble.get_at(new_extruder)) {                            // Soluble filament cannot be wiped in a random infill
         for (size_t i = 0; i < objects.size(); ++ i) {                              // Let's iterate through all objects...
+
+            if (!objects[i]->config.wipe_into_infill && !objects[i]->config.wipe_into_objects)
+                continue;
+
             Layer* this_layer = nullptr;
             for (unsigned int a = 0; a < objects[i]->layers.size(); ++a) // Finds this layer
                 if (std::abs(layer_tools.print_z - objects[i]->layers[a]->print_z) < EPSILON) {
@@ -1210,16 +1234,18 @@ float Print::mark_wiping_infill(const ToolOrdering::LayerTools& layer_tools, uns
                             continue;
                     }
 
-                    ExtrusionEntityCollection& eec = this_layer->regions[region_id]->fills;
+                    if (objects[i]->config.wipe_into_infill) {
-                    for (ExtrusionEntity* ee : eec.entities) {                      // iterate through all infill Collections
+                        ExtrusionEntityCollection& eec = this_layer->regions[region_id]->fills;
-                        auto* fill = dynamic_cast<ExtrusionEntityCollection*>(ee);
+                        for (ExtrusionEntity* ee : eec.entities) {                      // iterate through all infill Collections
-                        if (fill->role() == erTopSolidInfill || fill->role() == erGapFill) continue;         // these cannot be changed - it is / may be visible
+                            auto* fill = dynamic_cast<ExtrusionEntityCollection*>(ee);
-                            if (volume_to_wipe <= 0.f)
+                            if (fill->role() == erTopSolidInfill || fill->role() == erGapFill) continue;         // these cannot be changed - it is / may be visible
-                                break;
+                                if (volume_to_wipe <= 0.f)
-                            if (!fill->is_extruder_overridden(copy) && fill->total_volume() > min_infill_volume) {     // this infill will be used to wipe this extruder
+                                    break;
-                                fill->set_extruder_override(copy, new_extruder);
+                                if (!fill->is_extruder_overridden(copy) && fill->total_volume() > min_infill_volume) {     // this infill will be used to wipe this extruder
-                                volume_to_wipe -= fill->total_volume();
+                                    fill->set_extruder_override(copy, new_extruder);
-                            }
+                                    volume_to_wipe -= fill->total_volume();
+                                }
+                        }
                     }
 
                     if (objects[i]->config.wipe_into_objects)

xs/src/libslic3r/Print.hpp

@@ -317,7 +317,10 @@ private:
 
     // This function goes through all infill entities, decides which ones will be used for wiping and
     // marks them by the extruder id. Returns volume that remains to be wiped on the wipe tower:
-    float mark_wiping_infill(const ToolOrdering::LayerTools& layer_tools, unsigned int new_extruder, float volume_to_wipe);
+    float mark_wiping_extrusions(const ToolOrdering::LayerTools& layer_tools, unsigned int new_extruder, float volume_to_wipe);
+
+    // A function to go through all entities and unsets their extruder_override flag
+    void reset_wiping_extrusions();
 
     // Has the calculation been canceled?
     tbb::atomic<bool>   m_canceled;

xs/src/libslic3r/PrintConfig.cpp

@@ -1886,6 +1886,7 @@ PrintConfigDef::PrintConfigDef()
     def->default_value = new ConfigOptionFloat(0.);
 
     def = this->add("wipe_into_infill", coBool);
+    def->category = L("Extruders");
     def->label = L("Wiping into infill");
     def->tooltip = L("Wiping after toolchange will be preferentially done inside infills. "
                      "This lowers the amount of waste but may result in longer print time "

xs/src/libslic3r/PrintConfig.hpp

@@ -337,6 +337,7 @@ public:
     ConfigOptionFloatOrPercent      support_material_xy_spacing;
     ConfigOptionFloat               xy_size_compensation;
     ConfigOptionBool                wipe_into_objects;
+    ConfigOptionBool                wipe_into_infill;
 
 protected:
     void initialize(StaticCacheBase &cache, const char *base_ptr)
@@ -374,6 +375,7 @@ protected:
         OPT_PTR(support_material_with_sheath);
         OPT_PTR(xy_size_compensation);
         OPT_PTR(wipe_into_objects);
+        OPT_PTR(wipe_into_infill);
     }
 };
 
@@ -644,7 +646,6 @@ public:
     ConfigOptionFloat               wipe_tower_per_color_wipe;
     ConfigOptionFloat               wipe_tower_rotation_angle;
     ConfigOptionFloat               wipe_tower_bridging;
-    ConfigOptionBool                wipe_into_infill;
     ConfigOptionFloats              wiping_volumes_matrix;
     ConfigOptionFloats              wiping_volumes_extruders;
     ConfigOptionFloat               z_offset;
@@ -713,7 +714,6 @@ protected:
         OPT_PTR(wipe_tower_width);
         OPT_PTR(wipe_tower_per_color_wipe);
         OPT_PTR(wipe_tower_rotation_angle);
-        OPT_PTR(wipe_into_infill);
         OPT_PTR(wipe_tower_bridging);
         OPT_PTR(wiping_volumes_matrix);
         OPT_PTR(wiping_volumes_extruders);

xs/src/libslic3r/PrintObject.cpp

@@ -231,7 +231,10 @@ bool PrintObject::invalidate_state_by_config_options(const std::vector<t_config_
             || opt_key == "perimeter_speed"
             || opt_key == "small_perimeter_speed"
             || opt_key == "solid_infill_speed"
-            || opt_key == "top_solid_infill_speed") {
+            || opt_key == "top_solid_infill_speed"
+            || opt_key == "wipe_into_infill"    // when these these two are changed, we only need to invalidate the wipe tower,
+            || opt_key == "wipe_into_objects"   // which we already did at the very beginning - nothing more to be done
+            ) {
             // these options only affect G-code export, so nothing to invalidate
         } else {
             // for legacy, if we can't handle this option let's invalidate all steps
@@ -271,6 +274,8 @@ bool PrintObject::invalidate_step(PrintObjectStep step)
     }
 
     // Wipe tower depends on the ordering of extruders, which in turn depends on everything.
+    // It also decides about what the wipe_into_infill / wipe_into_object features will do,
+    // and that too depends on many of the settings.
     invalidated |= this->_print->invalidate_step(psWipeTower);
     return invalidated;
 }