QIDISlicer1.0.0

src/libslic3r/Geometry/MedialAxis.hpp

@@ -0,0 +1,46 @@
+#ifndef slic3r_Geometry_MedialAxis_hpp_
+#define slic3r_Geometry_MedialAxis_hpp_
+
+#include "Voronoi.hpp"
+#include "../ExPolygon.hpp"
+
+namespace Slic3r::Geometry {
+
+class MedialAxis {
+public:
+    MedialAxis(double min_width, double max_width, const ExPolygon &expolygon);
+    void build(ThickPolylines* polylines);
+    void build(Polylines* polylines);
+    
+private:
+    // Input
+    const ExPolygon     &m_expolygon;
+    Lines                m_lines;
+    // for filtering of the skeleton edges
+    double               m_min_width;
+    double               m_max_width;
+
+    // Voronoi Diagram.
+    using VD = VoronoiDiagram;
+    VD                   m_vd;
+
+    // Annotations of the VD skeleton edges.
+    struct EdgeData {
+        bool    active      { false };
+        double  width_start { 0 };
+        double  width_end   { 0 };
+    };
+    // Returns a reference to EdgeData and a "reversed" boolean.
+    std::pair<EdgeData&, bool> edge_data(const VD::edge_type &edge) {
+        size_t edge_id = &edge - &m_vd.edges().front();
+        return { m_edge_data[edge_id / 2], (edge_id & 1) != 0 };
+    }
+    std::vector<EdgeData> m_edge_data;
+
+    void process_edge_neighbors(const VD::edge_type* edge, ThickPolyline* polyline);
+    bool validate_edge(const VD::edge_type* edge);
+};
+
+} // namespace Slicer::Geometry
+
+#endif // slic3r_Geometry_MedialAxis_hpp_