Ported Slic3r::BridgeDetector to XS

xs/src/libslic3r/BridgeDetector.hpp

@@ -0,0 +1,33 @@
+#ifndef slic3r_BridgeDetector_hpp_
+#define slic3r_BridgeDetector_hpp_
+
+#include <myinit.h>
+#include "ExPolygon.hpp"
+#include "ExPolygonCollection.hpp"
+#include <string>
+
+namespace Slic3r {
+
+class BridgeDetector {
+    public:
+    ExPolygon expolygon;
+    ExPolygonCollection lower_slices;
+    double extrusion_width;  // scaled
+    double resolution;
+    double angle;
+    
+    BridgeDetector(const ExPolygon &_expolygon, const ExPolygonCollection &_lower_slices, coord_t _extrusion_width);
+    bool detect_angle();
+    void coverage(Polygons* coverage) const;
+    void coverage(double angle, Polygons* coverage) const;
+    void unsupported_edges(Polylines* unsupported) const;
+    void unsupported_edges(double angle, Polylines* unsupported) const;
+    
+    private:
+    Polylines _edges;   // representing the supporting edges
+    ExPolygons _anchors;
+};
+
+}
+
+#endif