More work on LOD - allowing material boundaries to collapse.

library/PolyVoxCore/include/IndexedSurfacePatch.h

@@ -70,6 +70,7 @@ namespace PolyVox
 	   POLYVOX_SHARED_PTR<IndexedSurfacePatch> extractSubset(std::set<uint8_t> setMaterials);
 
 	   void generateAveragedFaceNormals(bool bNormalise, bool bIncludeEdgeVertices = false);
+	   void generateMaterialWeightedNormals();
 
 	   //Vector3DInt32 m_v3dRegionPosition; //FIXME - remove this?
 

library/PolyVoxCore/include/SurfaceVertex.h

@@ -30,6 +30,7 @@ freely, subject to the following restrictions:
 #include "Vector.h"
 
 #include <bitset>
+#include <vector>
 
 namespace PolyVox
 {	
@@ -80,6 +81,9 @@ namespace PolyVox
 	public:		
 		Vector3DFloat position;
 		Vector3DFloat normal;
+		Vector3DFloat materialNormal;
+		int noOfMatchingNeighbours;
+		std::vector<uint8_t> neighbourMaterials;
 		float material; //FIXME: This shouldn't be float on CPU?
 		std::bitset<7> m_bFlags;	
 	};