first commit

include/engine/core/geometry_reducer.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__NGEOREDUCER__
+#define __NGEOREDUCER__
+
+
+		#include "math/vector.h"
+
+
+namespace GS {
+	namespace Core {
+		class Geometry;
+
+struct	nLLEDGE
+{
+	uint		a, b;
+	nLLEDGE		*p, *n;
+};
+
+struct	nEENTRY
+{
+	nLLEDGE	*edge;
+	nEENTRY	*n;
+};
+
+typedef	nEENTRY *	pnEENTRY;
+
+class	nEDGELIST
+{
+public:
+
+		pnEENTRY	*lut;
+		nLLEDGE		*root;
+		uint		vtx_count, nedg;
+
+		void		SetVertexCount(uint);
+		void		Add(uint, uint);
+		void		Remove(nLLEDGE *);
+		void		RemapEdges(uint, uint);
+		nLLEDGE		*GetEdge(uint, uint);
+
+		nEDGELIST ();
+		~nEDGELIST ();
+};
+
+class	nLLTRI
+{
+public:
+
+		uint		a, b, c;
+		ushort		m;
+		Vector4		normal;
+		nLLTRI		*p, *n;
+
+		char		UseVertex(uint);
+		void		ReplaceVertex(uint, uint);
+};
+
+struct	nTENTRY
+{
+	nLLTRI	*tri;
+	nTENTRY	*n;
+};
+
+typedef	nTENTRY *	pnTENTRY;
+
+class	nLTRILIST
+{
+public:
+
+		pnTENTRY	*lut;
+		nLLTRI		*root;
+		Geometry	*sg;
+
+		void		SetGeo(Geometry *);
+		nLLTRI		*Add(uint, uint, uint);
+		void		ReplaceVertex(uint, uint);
+		void		AddTriToVertex(nLLTRI *, uint);
+		void		RemoveTriFromVertex(nLLTRI *t, uint v);
+		void		Remove(nLLTRI *);
+		void		ComputeNormal(nLLTRI *);
+
+		uint		ntri;
+
+		nLTRILIST ();
+		~nLTRILIST ();
+};
+
+struct	nLVERTEX
+{
+		char		active, locked;
+		float		cost;
+		uint		tgtcollapse;
+};
+
+class	GeometryReducer
+{
+public:
+
+		nEDGELIST			elist;
+		nLTRILIST			tlist;
+		nLVERTEX			*vlist;
+
+		nLVERTEX			*AddVertex(uint v);
+		void				RemoveVertex(uint v);
+		void				ComputeVertexCost(Geometry *, uint);
+		float				ComputeEdgeCost(Geometry *, nLLEDGE *);
+		Geometry			*Reduce(Geometry *, float k);
+		char				IsBorder(uint v);
+};
+
+	} // Core
+} // GS
+
+
+#endif	// __NGEOREDUCER__