Working version of mesh decimation code which acts directly on vertex/index buffers.

Also initial work on a 'dynamic' mesh for simplification... but this probably won't be needed now.

library/PolyVoxCore/include/MeshEdge.h

@@ -0,0 +1,61 @@
+#pragma region License
+/*******************************************************************************
+Copyright (c) 2005-2009 David Williams
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution. 	
+*******************************************************************************/
+#pragma endregion
+
+#ifndef __PolyVox_MeshEdge_H__
+#define __PolyVox_MeshEdge_H__
+
+#include "PolyVoxForwardDeclarations.h"
+
+#include "PolyVoxImpl/TypeDef.h"
+
+namespace PolyVox
+{
+	class POLYVOXCORE_API MeshEdge
+	{
+	public:
+		MeshEdge();
+
+		bool isSane(void);
+
+		void computeEdgeCost(Mesh* pParentMesh);
+
+		MeshEdge* m_pOtherEdge;
+		MeshEdge* m_pNextEdge;
+		MeshEdge* m_pPreviousEdge;
+
+		MeshVertex* m_pSrc;
+		MeshVertex* m_pDest;
+
+		MeshFace* m_pFace;
+
+		float m_fCost;
+	};
+
+	//FIXME - Rather than being global, these should just be used to sort within the set.
+	bool operator==(const MeshEdge& lhs, const MeshEdge& rhs);
+	bool operator<(const MeshEdge& lhs, const MeshEdge& rhs);
+}
+
+#endif