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public/materialsystem/hardwareverts.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Hardware Verts
+//
+// Contains data purposely formatted for a dma copy into a D3D Vertex Buffer.
+// The file is divided into two partitions, the foremost contains the static
+// portion (header), the latter contains the streamable compliant portion.
+// The streamable component starts and ends on a sector (512) aligned boundary.
+// The header identifies the vertex format of the data and the atomic sizes of each component.
+// The hierarchial mesh is flattened for dma but the vertex counts are available
+// per mesh to transfer each mesh individually.
+//=============================================================================//
+
+#ifndef HARDWAREVERTS_H
+#define HARDWAREVERTS_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "datamap.h"
+
+// valve hardware vertexes
+#define VHV_VERSION	2
+
+namespace HardwareVerts
+{
+
+#pragma pack(1)
+
+struct MeshHeader_t
+{
+	DECLARE_BYTESWAP_DATADESC();
+
+	// this mesh is part of this lod
+	unsigned int m_nLod;
+
+	// this mesh has this many vertexes
+	unsigned int m_nVertexes;
+
+	// starting at this offset
+	unsigned int m_nOffset;
+
+	unsigned int m_nUnused[4];
+};
+
+struct FileHeader_t
+{
+	DECLARE_BYTESWAP_DATADESC();
+
+	// file version as defined by VHV_VERSION
+	int m_nVersion;
+
+	// must match checkSum in the .mdl header
+	unsigned int m_nChecksum;
+
+	// a vertex consists of these components
+	uint32 m_nVertexFlags;
+
+	// the byte size of a single vertex
+	// this won't be adequate, need some concept of byte format i.e. rgbexp32 vs rgba8888
+	unsigned int m_nVertexSize;
+
+	// total number of vertexes
+	unsigned int m_nVertexes;
+
+	int m_nMeshes;
+	inline MeshHeader_t *pMesh( int nMesh ) const 
+	{
+		return (MeshHeader_t *)(((byte *)this) + sizeof(FileHeader_t)) + nMesh;
+	};
+
+	inline void *pVertexBase( int nMesh ) const 
+	{
+		return (void *)((byte *)this + pMesh( nMesh )->m_nOffset);
+	};
+
+	unsigned int m_nUnused[4];
+};
+
+#pragma pack()
+
+}; // end namespace
+
+#endif // HARDWAREVERTS_H
+