Add filament shrink

src/libslic3r/Print.cpp

@@ -190,6 +190,8 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         } else if (
                opt_key == "first_layer_height"
             || opt_key == "nozzle_diameter"
+            //Y23
+            || opt_key == "filament_shrink"
             || opt_key == "resolution"
             // Spiral Vase forces different kind of slicing than the normal model:
             // In Spiral Vase mode, holes are closed and only the largest area contour is kept at each layer.

src/libslic3r/PrintConfig.cpp

@@ -1205,6 +1205,19 @@ void PrintConfigDef::init_fff_params()
     def->min = 0;
     def->set_default_value(new ConfigOptionFloats { 1.75 });
 
+    //Y23
+    def = this->add("filament_shrink", coPercents);
+    def->label = L("Shrinkage");
+    def->tooltip = L("Enter the shrinkage percentage that the filament will get after cooling (94% if you measure 94mm instead of 100mm)."
+        " The part will be scaled in xy to compensate."
+        " Only the filament used for the perimeter is taken into account."
+        "\nBe sure to allow enough space between objects, as this compensation is done after the checks.");
+    def->sidetext = L("%");
+    def->ratio_over = "";
+    def->min = 10;
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionPercents{ 100 });
+
     def = this->add("filament_density", coFloats);
     def->label = L("Density");
     def->tooltip = L("Enter your filament density here. This is only for statistical information. "

src/libslic3r/PrintConfig.hpp

@@ -839,6 +839,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionInts,               fan_below_layer_time))
     ((ConfigOptionStrings,            filament_colour))
     ((ConfigOptionStrings,            filament_notes))
+    //Y23
+    ((ConfigOptionPercents,           filament_shrink))
     ((ConfigOptionFloat,              first_layer_acceleration))
     ((ConfigOptionInts,               first_layer_bed_temperature))
     ((ConfigOptionFloatOrPercent,     first_layer_extrusion_width))

src/libslic3r/PrintObjectSlice.cpp

@@ -234,6 +234,7 @@ static std::vector<PrintObjectRegions::LayerRangeRegions>::const_iterator layer_
 }
 
 static std::vector<std::vector<ExPolygons>> slices_to_regions(
+    const PrintConfig                                        &print_config,
     ModelVolumePtrs                                           model_volumes,
     const PrintObjectRegions                                 &print_object_regions,
     const std::vector<float>                                 &zs,
@@ -396,6 +397,21 @@ static std::vector<std::vector<ExPolygons>> slices_to_regions(
             });
     }
 
+//Y23
+    for (const std::unique_ptr<PrintRegion>& pr : print_object_regions.all_regions) {
+        if (pr.get()) {
+            std::vector<ExPolygons>& region_polys = slices_by_region[pr->print_object_region_id()];
+            const size_t extruder_id = pr->extruder(FlowRole::frPerimeter) - 1;
+            double scale = print_config.filament_shrink.values[extruder_id] * 0.01;
+            if (scale != 1) {
+                scale = 1 / scale;
+                for (ExPolygons& polys : region_polys)
+                    for (ExPolygon& poly : polys)
+                        poly.scale(scale);
+            }
+        }
+    }
+
     return slices_by_region;
 }
 
@@ -698,7 +714,7 @@ void PrintObject::slice_volumes()
     }
 
     std::vector<float>                   slice_zs      = zs_from_layers(m_layers);
-    std::vector<std::vector<ExPolygons>> region_slices = slices_to_regions(this->model_object()->volumes, *m_shared_regions, slice_zs,
+    std::vector<std::vector<ExPolygons>> region_slices = slices_to_regions(print->config(), this->model_object()->volumes, *m_shared_regions, slice_zs,
         slice_volumes_inner(
             print->config(), this->config(), this->trafo_centered(),
             this->model_object()->volumes, m_shared_regions->layer_ranges, slice_zs, throw_on_cancel_callback),

src/slic3r/GUI/Tab.cpp

@@ -2165,6 +2165,8 @@ void TabFilament::build()
         optgroup->append_single_option_line("filament_diameter");
         optgroup->append_single_option_line("extrusion_multiplier");
         optgroup->append_single_option_line("filament_density");
+        //Y23
+        optgroup->append_single_option_line("filament_shrink");
         optgroup->append_single_option_line("filament_cost");
         optgroup->append_single_option_line("filament_spool_weight");
 //B