port from perforce

4kgfx/mesh.h

@@ -0,0 +1,92 @@
+#pragma once
+
+
+struct MeshVertex
+{
+	vec4 Position;
+	vec4 Normal;
+};
+
+
+struct Instance
+{
+	Matrix transform;
+};
+
+
+class Mesh
+{
+public:
+	Mesh();
+
+	struct VertexInfo
+	{
+		int Pos;
+		int Normal;
+		int UV;
+
+		bool operator < (const VertexInfo& v) const
+		{
+			if (Pos == v.Pos)
+			{
+				if (Normal == v.Normal)
+				{
+					return UV < v.UV;
+				}
+				return Normal < v.Normal;
+			}
+			return Pos < v.Pos;
+		} 
+	};	
+
+	int VertexCount;
+	int IndexCount;
+	int FaceCount;
+
+	static const int MaxVertexBuffer = 65536;
+	static const int MaxIndexBuffer = 65536 * 9 / 2;
+
+	MeshVertex* VertexBuffer;
+	unsigned short* IndexBuffer;
+
+	struct OpInfo
+	{
+		void Reset();
+
+		MeshVertex NextVB[Mesh::MaxVertexBuffer];
+		unsigned short int NextIB[Mesh::MaxIndexBuffer];
+		int NextVertexCount;
+		int NextIndexCount;
+		int NextFaceCount;
+		
+		int EdgeCount;
+		unsigned int EdgeConfiguration[Mesh::MaxIndexBuffer];
+		unsigned char EdgeUsage[Mesh::MaxIndexBuffer];
+		int MakeEdgeID(unsigned short VertexA, unsigned short VertexB);
+		unsigned short int EdgeID[Mesh::MaxIndexBuffer];
+	};
+
+	OpInfo OP;
+
+	unsigned int VertexArrayObject;
+	unsigned int VertexArrayBuffer;
+	unsigned int IndexBufferObject;
+
+	void Render();
+	void Lock();
+	void Unlock();
+
+	void Transform(const Matrix& transform);
+	void CreateCube();
+	void CreateSphere(unsigned int lod);
+
+private:
+	void Homogenize();
+	void GenerateNormals();
+	void NormalizeNormals();
+	void CatmullClarkSubdivide();
+	void StandardSubdivide();
+	void Extrude(float extend);
+	void Bevel(float extend, float minAngle);
+	void Triangulate();
+};