Add basic skin generation

CURA-12250

CMakeLists.txt

@@ -101,6 +101,7 @@ set(engine_SRCS # Except main.cpp.
         src/feature_generation/MeshFeatureGenerator.cpp include/feature_generation/MeshFeatureGenerator.h
         src/feature_generation/MeshInfillGenerator.cpp include/feature_generation/MeshInfillGenerator.h
         src/feature_generation/MeshInsetsGenerator.cpp include/feature_generation/MeshInsetsGenerator.h
+        src/feature_generation/MeshSkinGenerator.cpp include/feature_generation/MeshSkinGenerator.h
         src/feature_generation/SkirtBrimAppender.cpp include/feature_generation/SkirtBrimAppender.h
 
         src/infill/ImageBasedDensityProvider.cpp

include/feature_generation/MeshSkinGenerator.h

@@ -0,0 +1,46 @@
+// Copyright (c) 2024 UltiMaker
+// CuraEngine is released under the terms of the AGPLv3 or higher
+
+#pragma once
+
+#include <utils/Coord_t.h>
+
+#include "feature_generation/MeshFeatureGenerator.h"
+
+namespace cura
+{
+
+enum class EFillMethod;
+enum class PrintFeatureType : unsigned char;
+struct GCodePathConfig;
+struct Ratio;
+class AngleDegrees;
+class SkinPart;
+class Shape;
+
+class MeshSkinGenerator : public MeshFeatureGenerator
+{
+public:
+    explicit MeshSkinGenerator(const std::shared_ptr<SliceMeshStorage>& mesh);
+
+protected:
+    void generateFeatures(const SliceDataStorage& storage, const LayerPlanPtr& layer_plan, const std::vector<ExtruderPlanPtr>& extruder_plans, const SliceLayerPart& part)
+        const override;
+
+private:
+    void processRoofing(const LayerPlanPtr& layer_plan, const SkinPart& skin_part, const ExtruderPlanPtr& extruder_plan) const;
+
+    void processTopBottom(const SliceDataStorage& storage, const LayerPlanPtr& layer_plan, const SkinPart& skin_part, const ExtruderPlanPtr& extruder_plan) const;
+
+    void processSkinPrintFeature(
+        const LayerPlanPtr& layer_plan,
+        const Shape& area,
+        const GCodePathConfig& config,
+        EFillMethod pattern,
+        const AngleDegrees skin_angle,
+        const Ratio skin_density,
+        const PrintFeatureType feature_type,
+        const ExtruderPlanPtr& extruder_plan) const;
+};
+
+} // namespace cura

src/FffGcodeWriter.cpp

@@ -31,6 +31,7 @@
 #include "feature_generation/FeatureGenerator.h"
 #include "feature_generation/MeshInfillGenerator.h"
 #include "feature_generation/MeshInsetsGenerator.h"
+#include "feature_generation/MeshSkinGenerator.h"
 #include "geometry/LinesSet.h"
 #include "geometry/OpenPolyline.h"
 #include "geometry/PointMatrix.h"
@@ -196,9 +197,10 @@ void FffGcodeWriter::writeGCode(SliceDataStorage& storage, TimeKeeper& time_keep
     {
         feature_generators_.push_back(std::make_shared<MeshInsetsGenerator>(mesh));
         feature_generators_.push_back(std::make_shared<MeshInfillGenerator>(mesh));
+        feature_generators_.push_back(std::make_shared<MeshSkinGenerator>(mesh));
     }
 
-    // Filter out generators that are actually useless in this context. Not highly useful, but helps for debugging.
+    // Filter out generators that are actually useless in this context, to save significant time on next steps
     ranges::remove_if(
         feature_generators_,
         [](const std::shared_ptr<FeatureGenerator>& generator)

src/feature_generation/MeshInfillGenerator.cpp

@@ -198,9 +198,9 @@ void MeshInfillGenerator::generateFeatures(
                     feature_extrusion->appendExtruderMoveSequence(ContinuousExtruderMoveSequence::makeFrom(extrusion_line, infill_config.getSpeed()));
                 }
             }
-
-            extruder_plan_infill->appendFeatureExtrusion(feature_extrusion);
         }
+
+        extruder_plan_infill->appendFeatureExtrusion(feature_extrusion);
     }
 }