Fills were reimplemented in C++.

While reimplementing the FillPlanePath code, the octagon infill was fixed to extrude the right amount of material.

xs/src/libslic3r/Fill/Fill3DHoneycomb.hpp

@@ -0,0 +1,24 @@
+#ifndef slic3r_Fill3DHoneycomb_hpp_
+#define slic3r_Fill3DHoneycomb_hpp_
+
+#include <map>
+
+#include "../libslic3r.h"
+
+#include "FillBase.hpp"
+
+namespace Slic3r {
+
+class Fill3DHoneycomb : public FillWithDirection
+{
+public:
+    virtual ~Fill3DHoneycomb() {}
+    virtual Polylines fill_surface(const Surface *surface, const FillParams &params);
+	
+	// require bridge flow since most of this pattern hangs in air
+    virtual bool use_bridge_flow() const { return true; }
+};
+
+} // namespace Slic3r
+
+#endif // slic3r_Fill3DHoneycomb_hpp_