Added missing files

src/libslic3r/clipper.cpp

@@ -0,0 +1,13 @@
+// Hackish wrapper around the ClipperLib library to compile the Clipper library using Slic3r::Point.
+
+#include "clipper.hpp"
+
+// Don't include <clipper/clipper.hpp> for the second time.
+#define clipper_hpp
+
+// Override ClipperLib namespace to Slic3r::ClipperLib
+#define CLIPPERLIB_NAMESPACE_PREFIX	Slic3r
+// Override Slic3r::ClipperLib::IntPoint to Slic3r::Point
+#define CLIPPERLIB_INTPOINT_TYPE    Slic3r::Point
+
+#include <clipper/clipper.cpp>

src/libslic3r/clipper.hpp

@@ -0,0 +1,26 @@
+// Hackish wrapper around the ClipperLib library to compile the Clipper library using Slic3r's own Point type.
+
+#ifndef slic3r_clipper_hpp
+
+#ifdef clipper_hpp
+#error "You should include the libslic3r/clipper.hpp before clipper/clipper.hpp"
+#endif
+
+#ifdef CLIPPERLIB_USE_XYZ
+#error "Something went wrong. Using clipper.hpp with Slic3r Point type, but CLIPPERLIB_USE_XYZ is defined."
+#endif
+
+#define slic3r_clipper_hpp
+
+#include "Point.hpp"
+
+#define CLIPPERLIB_NAMESPACE_PREFIX		Slic3r
+#define CLIPPERLIB_INTPOINT_TYPE    	Slic3r::Point
+
+#include <clipper/clipper.hpp>
+
+#undef clipper_hpp
+#undef CLIPPERLIB_NAMESPACE_PREFIX
+#undef CLIPPERLIB_INTPOINT_TYPE
+
+#endif // slic3r_clipper_hpp