GeometryOptimiser.h

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*/
// GeometryOptimiser.h

#include "tr_local.h"
#include "Material.h"

#ifndef GEOMETRY_OPTIMISER_H
#define GEOMETRY_OPTIMISER_H

static const uint32_t MAX_MATERIAL_SURFACE_TRIS = 64;
static const uint32_t MAX_MATERIAL_SURFACE_INDEXES = 3 * MAX_MATERIAL_SURFACE_TRIS;

struct MapVertHasher {
	size_t operator()( const srfVert_t& vert ) const {
		uint32_t hash = ~( Util::bit_cast<uint32_t, float>( vert.xyz[0] ) << 15 );
		hash ^= ( Util::bit_cast<uint32_t, float>( vert.xyz[0] ) >> 10 );
		hash += ( Util::bit_cast<uint32_t, float>( vert.xyz[1] ) << 3 );
		hash ^= ( Util::bit_cast<uint32_t, float>( vert.xyz[1] ) >> 6 );
		hash += ( Util::bit_cast<uint32_t, float>( vert.xyz[2] ) << 11 );
		hash ^= ( Util::bit_cast<uint32_t, float>( vert.xyz[2] ) >> 16 );

		return hash;
	}
};

static bool CompareEpsilon( float lhs, float rhs ) {
	float diff = fabsf( lhs - rhs );
	return diff <= 0.000001;
}

struct MapVertEqual {
	bool operator()( const srfVert_t& lhs, const srfVert_t& rhs ) const {
		return VectorCompare( lhs.xyz, rhs.xyz )
			&& CompareEpsilon( lhs.st[0], rhs.st[0] ) && CompareEpsilon( lhs.st[1], rhs.st[1] )
			&& CompareEpsilon( lhs.lightmap[0], rhs.lightmap[0] ) && CompareEpsilon( lhs.lightmap[1], rhs.lightmap[1] )
			&& VectorCompareEpsilon( lhs.normal, rhs.normal, 0.0001f )
			&& CompareEpsilon( lhs.qtangent[0], rhs.qtangent[0] ) && CompareEpsilon( lhs.qtangent[1], rhs.qtangent[1] )
			&& CompareEpsilon( lhs.qtangent[2], rhs.qtangent[2] ) && CompareEpsilon( lhs.qtangent[3], rhs.qtangent[3] )
			&& lhs.lightColor.Red() == rhs.lightColor.Red() && lhs.lightColor.Green() == rhs.lightColor.Green()
			&& lhs.lightColor.Blue() == rhs.lightColor.Blue() && lhs.lightColor.Alpha() == rhs.lightColor.Alpha();
	}
};

struct SurfaceIndexes {
	glIndex_t idxs[MAX_MATERIAL_SURFACE_INDEXES];
};

void MarkShaderBuildNONE( const shaderStage_t* );
void MarkShaderBuildNOP( const shaderStage_t* );
void MarkShaderBuildGeneric3D( const shaderStage_t* pStage );
void MarkShaderBuildLightMapping( const shaderStage_t* pStage );
void MarkShaderBuildReflection( const shaderStage_t* pStage );
void MarkShaderBuildSkybox( const shaderStage_t* pStage );
void MarkShaderBuildScreen( const shaderStage_t* pStage );
void MarkShaderBuildHeatHaze( const shaderStage_t* pStage );
void MarkShaderBuildLiquid( const shaderStage_t* pStage );

void MarkShaderBuildIQM( const IQModel_t* model );
void MarkShaderBuildMDV( const mdvModel_t* model );
void MarkShaderBuildMD5( const md5Model_t* model );

void MarkShaderBuild( shader_t* shader, const int lightMapNum, const bool bspSurface,
	const bool vertexSkinning, const bool vertexAnimation );

void OptimiseMapGeometryCore( world_t* world, bspSurface_t** rendererSurfaces, int numSurfaces );
void MergeLeafSurfacesCore( world_t* world, bspSurface_t** rendererSurfaces, int numSurfaces );
void MergeDuplicateVertices( bspSurface_t** rendererSurfaces, int numSurfaces, srfVert_t* vertices, int numVerticesIn,
	glIndex_t* indices, int numIndicesIn, int& numVerticesOut, int& numIndicesOut );
std::vector<MaterialSurface> OptimiseMapGeometryMaterial( world_t* world, bspSurface_t** rendererSurfaces, int numSurfaces,
	const srfVert_t* vertices, const int numVerticesIn, const glIndex_t* indices, const int numIndicesIn );

#endif // GEOMETRY_OPTIMISER_H