1 files changed, 104 insertions, 0 deletions
diff --git a/xs/src/libslic3r/ExtrusionEntity.hpp b/xs/src/libslic3r/ExtrusionEntity.hpp
new file mode 100644
index 000000000..ccd85a689
--- /dev/null
+++ b/xs/src/libslic3r/ExtrusionEntity.hpp
@@ -0,0 +1,104 @@
+#ifndef slic3r_ExtrusionEntity_hpp_
+#define slic3r_ExtrusionEntity_hpp_
+
+#include <myinit.h>
+#include "Polygon.hpp"
+#include "Polyline.hpp"
+
+namespace Slic3r {
+
+class ExPolygonCollection;
+class ExtrusionEntityCollection;
+class Extruder;
+
+/* Each ExtrusionRole value identifies a distinct set of { extruder, speed } */
+enum ExtrusionRole {
+    erPerimeter,
+    erExternalPerimeter,
+    erOverhangPerimeter,
+    erInternalInfill,
+    erSolidInfill,
+    erTopSolidInfill,
+    erBridgeInfill,
+    erGapFill,
+    erSkirt,
+    erSupportMaterial,
+    erSupportMaterialInterface,
+};
+
+/* Special flags describing loop */
+enum ExtrusionLoopRole {
+    elrDefault,
+    elrExternalPerimeter,
+    elrContourInternalPerimeter,
+};
+
+class ExtrusionEntity
+{
+    public:
+    virtual ExtrusionEntity* clone() const = 0;
+    virtual ~ExtrusionEntity() {};
+    virtual void reverse() = 0;
+    virtual Point first_point() const = 0;
+    virtual Point last_point() const = 0;
+};
+
+typedef std::vector<ExtrusionEntity*> ExtrusionEntitiesPtr;
+
+class ExtrusionPath : public ExtrusionEntity
+{
+    public:
+    Polyline polyline;
+    ExtrusionRole role;
+    double mm3_per_mm;  // mm^3 of plastic per mm of linear head motion
+    float width;
+    float height;
+    
+    ExtrusionPath(ExtrusionRole role) : role(role), mm3_per_mm(-1), width(-1), height(-1) {};
+    ExtrusionPath* clone() const;
+    void reverse();
+    Point first_point() const;
+    Point last_point() const;
+    void intersect_expolygons(const ExPolygonCollection &collection, ExtrusionEntityCollection* retval) const;
+    void subtract_expolygons(const ExPolygonCollection &collection, ExtrusionEntityCollection* retval) const;
+    void clip_end(double distance);
+    void simplify(double tolerance);
+    double length() const;
+    bool is_perimeter() const;
+    bool is_fill() const;
+    bool is_bridge() const;
+    std::string gcode(Extruder* extruder, double e, double F,
+        double xofs, double yofs, std::string extrusion_axis,
+        std::string gcode_line_suffix) const;
+
+    private:
+    void _inflate_collection(const Polylines &polylines, ExtrusionEntityCollection* collection) const;
+};
+
+typedef std::vector<ExtrusionPath> ExtrusionPaths;
+
+class ExtrusionLoop : public ExtrusionEntity
+{
+    public:
+    ExtrusionPaths paths;
+    ExtrusionLoopRole role;
+    
+    ExtrusionLoop(ExtrusionLoopRole role = elrDefault) : role(role) {};
+    operator Polygon() const;
+    ExtrusionLoop* clone() const;
+    bool make_clockwise();
+    bool make_counter_clockwise();
+    void reverse();
+    Point first_point() const;
+    Point last_point() const;
+    void polygon(Polygon* polygon) const;
+    double length() const;
+    void split_at_vertex(const Point &point);
+    void split_at(const Point &point);
+    void clip_end(double distance, ExtrusionPaths* paths) const;
+    bool has_overhang_point(const Point &point) const;
+};
+
+}
+
+#endif