Ported ExtrusionPath to XS. Failing test for Surface

xs/src/ExtrusionEntity.hpp

@@ -0,0 +1,60 @@
+#ifndef slic3r_ExtrusionEntity_hpp_
+#define slic3r_ExtrusionEntity_hpp_
+
+extern "C" {
+#include "EXTERN.h"
+#include "perl.h"
+#include "XSUB.h"
+#include "ppport.h"
+}
+
+#include "Polygon.hpp"
+#include "Polyline.hpp"
+
+namespace Slic3r {
+
+enum ExtrusionRole {
+    erPerimeter,
+    erExternalPerimeter,
+    erOverhangPerimeter,
+    erContourInternalPerimeter,
+    erFill,
+    erSolidFill,
+    erTopSolidFill,
+    erBrige,
+    erInternalBridge,
+    erSkirt,
+    erSupportMaterial,
+    erGapFill,
+};
+
+class ExtrusionEntity
+{
+    public:
+    ExtrusionRole role;
+    double height;  // vertical thickness of the extrusion expressed in mm
+    double flow_spacing;
+};
+
+class ExtrusionPath : public ExtrusionEntity
+{
+    public:
+    Polyline polyline;
+    void reverse();
+};
+
+class ExtrusionLoop : public ExtrusionEntity
+{
+    public:
+    Polygon polygon;
+};
+
+void
+ExtrusionPath::reverse()
+{
+    this->polyline.reverse();
+}
+
+}
+
+#endif