doom3-bfg/neo/renderer/Model_md5.cpp

/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#pragma hdrstop
#include "../idlib/precompiled.h"

#include "tr_local.h"
#include "Model_local.h"

#ifdef ID_WIN_X86_SSE2_INTRIN

static const __m128 vector_float_posInfinity		= { idMath::INFINITY, idMath::INFINITY, idMath::INFINITY, idMath::INFINITY };
static const __m128 vector_float_negInfinity		= { -idMath::INFINITY, -idMath::INFINITY, -idMath::INFINITY, -idMath::INFINITY };

#endif

static const char *MD5_SnapshotName = "_MD5_Snapshot_";

static const byte MD5B_VERSION = 106;
static const unsigned int MD5B_MAGIC = ( '5' << 24 ) | ( 'D' << 16 ) | ( 'M' << 8 ) | MD5B_VERSION;

idCVar r_useGPUSkinning( "r_useGPUSkinning", "1", CVAR_INTEGER, "animate normals and tangents instead of deriving" );

/***********************************************************************

	idMD5Mesh

***********************************************************************/

static int c_numVerts = 0;
static int c_numWeights = 0;
static int c_numWeightJoints = 0;

struct vertexWeight_t {
	int							joint;
	idVec3						offset;
	float						jointWeight;
};

/*
====================
idMD5Mesh::idMD5Mesh
====================
*/
idMD5Mesh::idMD5Mesh() {
	shader				= NULL;
	numVerts			= 0;
	numTris				= 0;
	meshJoints			= NULL;
	numMeshJoints		= 0;
	maxJointVertDist	= 0.0f;
	deformInfo			= NULL;
	surfaceNum			= 0;
}

/*
====================
idMD5Mesh::~idMD5Mesh
====================
*/
idMD5Mesh::~idMD5Mesh() {
	if ( meshJoints != NULL ) {
		Mem_Free( meshJoints );
		meshJoints = NULL;
	}
	if ( deformInfo != NULL ) {
		R_FreeDeformInfo( deformInfo );
		deformInfo = NULL;
	}
}

/*
====================
idMD5Mesh::ParseMesh
====================
*/
void idMD5Mesh::ParseMesh( idLexer &parser, int numJoints, const idJointMat *joints ) {
	idToken		token;
	idToken		name;

	parser.ExpectTokenString( "{" );

	//
	// parse name
	//
	if ( parser.CheckTokenString( "name" ) ) {
		parser.ReadToken( &name );
	}

	//
	// parse shader
	//
	parser.ExpectTokenString( "shader" );

	parser.ReadToken( &token );
	idStr shaderName = token;

    shader = declManager->FindMaterial( shaderName );

	//
	// parse texture coordinates
	//
	parser.ExpectTokenString( "numverts" );
	int count = parser.ParseInt();
	if ( count < 0 ) {
		parser.Error( "Invalid size: %s", token.c_str() );
	}

	this->numVerts = count;

	idList<idVec2> texCoords;
	idList<int> firstWeightForVertex;
	idList<int> numWeightsForVertex;

	texCoords.SetNum( count );
	firstWeightForVertex.SetNum( count );
	numWeightsForVertex.SetNum( count );

	int numWeights = 0;
	int maxweight = 0;
	for ( int i = 0; i < texCoords.Num(); i++ ) {
		parser.ExpectTokenString( "vert" );
		parser.ParseInt();

		parser.Parse1DMatrix( 2, texCoords[ i ].ToFloatPtr() );

		firstWeightForVertex[ i ]	= parser.ParseInt();
		numWeightsForVertex[ i ]	= parser.ParseInt();

		if ( !numWeightsForVertex[ i ] ) {
			parser.Error( "Vertex without any joint weights." );
		}

		numWeights += numWeightsForVertex[ i ];
		if ( numWeightsForVertex[ i ] + firstWeightForVertex[ i ] > maxweight ) {
			maxweight = numWeightsForVertex[ i ] + firstWeightForVertex[ i ];
		}
	}

	//
	// parse tris
	//
	parser.ExpectTokenString( "numtris" );
	count = parser.ParseInt();
	if ( count < 0 ) {
		parser.Error( "Invalid size: %d", count );
	}

	idList<int> tris;
	tris.SetNum( count * 3 );
	numTris = count;
	for ( int i = 0; i < count; i++ ) {
		parser.ExpectTokenString( "tri" );
		parser.ParseInt();

		tris[ i * 3 + 0 ] = parser.ParseInt();
		tris[ i * 3 + 1 ] = parser.ParseInt();
		tris[ i * 3 + 2 ] = parser.ParseInt();
	}

	//
	// parse weights
	//
	parser.ExpectTokenString( "numweights" );
	count = parser.ParseInt();
	if ( count < 0 ) {
		parser.Error( "Invalid size: %d", count );
	}

	if ( maxweight > count ) {
		parser.Warning( "Vertices reference out of range weights in model (%d of %d weights).", maxweight, count );
	}

	idList<vertexWeight_t> tempWeights;
	tempWeights.SetNum( count );
	assert( numJoints < 256 );		// so we can pack into bytes

	for ( int i = 0; i < count; i++ ) {
		parser.ExpectTokenString( "weight" );
		parser.ParseInt();

		int jointnum = parser.ParseInt();
		if ( ( jointnum < 0 ) || ( jointnum >= numJoints ) ) {
			parser.Error( "Joint Index out of range(%d): %d", numJoints, jointnum );
		}

		tempWeights[ i ].joint			= jointnum;
		tempWeights[ i ].jointWeight	= parser.ParseFloat();

		parser.Parse1DMatrix( 3, tempWeights[ i ].offset.ToFloatPtr() );
	}

	// create pre-scaled weights and an index for the vertex/joint lookup
	idVec4 * scaledWeights = (idVec4 *) Mem_Alloc16( numWeights * sizeof( scaledWeights[0] ), TAG_MD5_WEIGHT );
	int * weightIndex = (int *) Mem_Alloc16( numWeights * 2 * sizeof( weightIndex[0] ), TAG_MD5_INDEX );
	memset( weightIndex, 0, numWeights * 2 * sizeof( weightIndex[0] ) );

	count = 0;
	for ( int i = 0; i < texCoords.Num(); i++ ) {
		int num = firstWeightForVertex[i];
		for( int j = 0; j < numWeightsForVertex[i]; j++, num++, count++ ) {
			scaledWeights[count].ToVec3() = tempWeights[num].offset * tempWeights[num].jointWeight;
			scaledWeights[count].w = tempWeights[num].jointWeight;
			weightIndex[count * 2 + 0] = tempWeights[num].joint * sizeof( idJointMat );
		}
		weightIndex[count * 2 - 1] = 1;
	}

	parser.ExpectTokenString( "}" );

	// update counters
	c_numVerts += texCoords.Num();
	c_numWeights += numWeights;
	c_numWeightJoints++;
	for ( int i = 0; i < numWeights; i++ ) {
		c_numWeightJoints += weightIndex[i*2+1];
	}

	//
	// build a base pose that can be used for skinning
	//
	idDrawVert * basePose = (idDrawVert *)Mem_ClearedAlloc( texCoords.Num() * sizeof( *basePose ), TAG_MD5_BASE );
	for( int j = 0, i = 0; i < texCoords.Num(); i++ ) {
		idVec3 v = ( *(idJointMat *) ( (byte *)joints + weightIndex[j*2+0] ) ) * scaledWeights[j];
		while( weightIndex[j*2+1] == 0 ) {
			j++;
			v += ( *(idJointMat *) ( (byte *)joints + weightIndex[j*2+0] ) ) * scaledWeights[j];
		}
		j++;

		basePose[i].Clear();
		basePose[i].xyz = v;
		basePose[i].SetTexCoord( texCoords[i] );
	}

	// build the weights and bone indexes into the verts, so they will be duplicated
	// as necessary at mirror seems

	static int maxWeightsPerVert;
	static float maxResidualWeight;

	const int MAX_VERTEX_WEIGHTS = 4;

	idList< bool > jointIsUsed;
	jointIsUsed.SetNum( numJoints );
	for ( int i = 0; i < jointIsUsed.Num(); i++ ) {
		jointIsUsed[i] = false;
	}

	numMeshJoints = 0;
	maxJointVertDist = 0.0f;

	//-----------------------------------------
	// new-style setup for fixed four weights and normal / tangent deformation
	//
	// Several important models have >25% residual weight in joints after the
	// first four, which is worrisome for using a fixed four joint deformation.
	//-----------------------------------------
	for ( int i = 0; i < texCoords.Num(); i++ ) {
		idDrawVert & dv = basePose[i];

		// some models do have >4 joint weights, so it is necessary to sort and renormalize

		// sort the weights and take the four largest
		int	weights[256];
		const int numWeights = numWeightsForVertex[ i ];
		for ( int j = 0; j < numWeights; j++ ) {
			weights[j] = firstWeightForVertex[i] + j;
		}
		// bubble sort
		for ( int j = 0; j < numWeights; j++ ) {
			for ( int k = 0; k < numWeights - 1 - j; k++ ) {
				if ( tempWeights[weights[k]].jointWeight < tempWeights[weights[k+1]].jointWeight ) {
					SwapValues( weights[k], weights[k+1] );
				}
			}
		}

		if ( numWeights > maxWeightsPerVert ) {
			maxWeightsPerVert = numWeights;
		}

		const int usedWeights = Min( MAX_VERTEX_WEIGHTS, numWeights );

		float totalWeight = 0;
		for ( int j = 0; j < numWeights; j++ ) {
			totalWeight += tempWeights[weights[j]].jointWeight;
		}
		assert( totalWeight > 0.999f && totalWeight < 1.001f );

		float usedWeight = 0;
		for ( int j = 0; j < usedWeights; j++ ) {
			usedWeight += tempWeights[weights[j]].jointWeight;
		}

		const float residualWeight = totalWeight - usedWeight;
		if ( residualWeight > maxResidualWeight ) {
			maxResidualWeight = residualWeight;
		}

		byte finalWeights[MAX_VERTEX_WEIGHTS] = { 0 };
		byte finalJointIndecies[MAX_VERTEX_WEIGHTS] = { 0 };
		for ( int j = 0; j < usedWeights; j++ ) {
			const vertexWeight_t & weight = tempWeights[weights[j]];
			const int jointIndex = weight.joint;
			const float fw = weight.jointWeight;
			assert( fw >= 0.0f && fw <= 1.0f );
			const float normalizedWeight = fw / usedWeight;
			finalWeights[j] = idMath::Ftob( normalizedWeight * 255.0f);
			finalJointIndecies[j] = jointIndex;
		}

		// Sort the weights and indices for hardware skinning
		for ( int k = 0; k < 3; ++k ) {
			for ( int l = k + 1; l < 4; ++l ) {
				if ( finalWeights[l] > finalWeights[k] ) {
					SwapValues( finalWeights[k], finalWeights[l] );
					SwapValues( finalJointIndecies[k], finalJointIndecies[l] );
				}
			}
		}

		// Give any left over to the biggest weight
		finalWeights[0] += Max( 255 - finalWeights[0] - finalWeights[1] - finalWeights[2] - finalWeights[3], 0 );

		dv.color[0] = finalJointIndecies[0];
		dv.color[1] = finalJointIndecies[1];
		dv.color[2] = finalJointIndecies[2];
		dv.color[3] = finalJointIndecies[3];

		dv.color2[0] = finalWeights[0];
		dv.color2[1] = finalWeights[1];
		dv.color2[2] = finalWeights[2];
		dv.color2[3] = finalWeights[3];

		for ( int j = usedWeights; j < 4; j++ ) {
			assert( dv.color2[j] == 0 );
		}

		for ( int j = 0; j < usedWeights; j++ ) {
			if ( !jointIsUsed[finalJointIndecies[j]] ) {
				jointIsUsed[finalJointIndecies[j]] = true;
				numMeshJoints++;
			}
			const idJointMat & joint = joints[finalJointIndecies[j]];
			float dist = ( dv.xyz - joint.GetTranslation() ).Length();
			if ( dist > maxJointVertDist ) {
				maxJointVertDist = dist;
			}
		}
	}

	meshJoints = (byte *) Mem_Alloc( numMeshJoints * sizeof( meshJoints[0] ), TAG_MODEL );
	numMeshJoints = 0;
	for ( int i = 0; i < numJoints; i++ ) {
		if ( jointIsUsed[i] ) {
			meshJoints[numMeshJoints++] = i;
		}
	}

	// build the deformInfo and collect a final base pose with the mirror
	// seam verts properly including the bone weights
	deformInfo = R_BuildDeformInfo( texCoords.Num(), basePose, tris.Num(), tris.Ptr(),
										shader->UseUnsmoothedTangents() );

	for ( int i = 0; i < deformInfo->numOutputVerts; i++ ) {
		for ( int j = 0; j < 4; j++ ) {
			if ( deformInfo->verts[i].color[j] >= numJoints ) {
				idLib::FatalError( "Bad joint index" );
			}
		}
	}

	Mem_Free( basePose );
}

/*
============
TransformVertsAndTangents
============
*/
void TransformVertsAndTangents( idDrawVert * targetVerts, const int numVerts, const idDrawVert *baseVerts, const idJointMat *joints ) {
	for( int i = 0; i < numVerts; i++ ) {
		const idDrawVert & base = baseVerts[i];

		const idJointMat & j0 = joints[base.color[0]];
		const idJointMat & j1 = joints[base.color[1]];
		const idJointMat & j2 = joints[base.color[2]];
		const idJointMat & j3 = joints[base.color[3]];

		const float w0 = base.color2[0] * ( 1.0f / 255.0f );
		const float w1 = base.color2[1] * ( 1.0f / 255.0f );
		const float w2 = base.color2[2] * ( 1.0f / 255.0f );
		const float w3 = base.color2[3] * ( 1.0f / 255.0f );

		idJointMat accum;
		idJointMat::Mul( accum, j0, w0 );
		idJointMat::Mad( accum, j1, w1 );
		idJointMat::Mad( accum, j2, w2 );
		idJointMat::Mad( accum, j3, w3 );

		targetVerts[i].xyz = accum * idVec4( base.xyz.x, base.xyz.y, base.xyz.z, 1.0f );
		targetVerts[i].SetNormal( accum * base.GetNormal() );
		targetVerts[i].SetTangent( accum * base.GetTangent() );
		targetVerts[i].tangent[3] = base.tangent[3];
	}
}

/*
====================
idMD5Mesh::UpdateSurface
====================
*/
void idMD5Mesh::UpdateSurface( const struct renderEntity_s *ent, const idJointMat *entJoints,
								const idJointMat *entJointsInverted, modelSurface_t *surf ) {

	tr.pc.c_deformedSurfaces++;
	tr.pc.c_deformedVerts += deformInfo->numOutputVerts;
	tr.pc.c_deformedIndexes += deformInfo->numIndexes;

	surf->shader = shader;

	if ( surf->geometry != NULL ) {
		// if the number of verts and indexes are the same we can re-use the triangle surface
		if ( surf->geometry->numVerts == deformInfo->numOutputVerts && surf->geometry->numIndexes == deformInfo->numIndexes ) {
			R_FreeStaticTriSurfVertexCaches( surf->geometry );
		} else {
			R_FreeStaticTriSurf( surf->geometry );
			surf->geometry = R_AllocStaticTriSurf();
		}
	} else {
		surf->geometry = R_AllocStaticTriSurf();
	}

	srfTriangles_t * tri = surf->geometry;

	// note that some of the data is referenced, and should not be freed
	tri->referencedIndexes = true;
	tri->numIndexes = deformInfo->numIndexes;
	tri->indexes = deformInfo->indexes;
	tri->silIndexes = deformInfo->silIndexes;
	tri->numMirroredVerts = deformInfo->numMirroredVerts;
	tri->mirroredVerts = deformInfo->mirroredVerts;
	tri->numDupVerts = deformInfo->numDupVerts;
	tri->dupVerts = deformInfo->dupVerts;
	tri->numSilEdges = deformInfo->numSilEdges;
	tri->silEdges = deformInfo->silEdges;

	tri->indexCache = deformInfo->staticIndexCache;

	tri->numVerts = deformInfo->numOutputVerts;
	if ( r_useGPUSkinning.GetBool() ) {
		if ( tri->verts != NULL && tri->verts != deformInfo->verts ) {
			R_FreeStaticTriSurfVerts( tri );
		}
		tri->verts = deformInfo->verts;
		tri->ambientCache = deformInfo->staticAmbientCache;
		tri->shadowCache = deformInfo->staticShadowCache;
		tri->referencedVerts = true;
	} else {
		if ( tri->verts == NULL || tri->verts == deformInfo->verts ) {
			tri->verts = NULL;
			R_AllocStaticTriSurfVerts( tri, deformInfo->numOutputVerts );
			assert( tri->verts != NULL );	// quiet analyze warning
			memcpy( tri->verts, deformInfo->verts, deformInfo->numOutputVerts * sizeof( deformInfo->verts[0] ) );	// copy over the texture coordinates
		}
		TransformVertsAndTangents( tri->verts, deformInfo->numOutputVerts, deformInfo->verts, entJointsInverted );
		tri->referencedVerts = false;
	}
	tri->tangentsCalculated = true;

	CalculateBounds( entJoints, tri->bounds );
}

/*
====================
idMD5Mesh::CalculateBounds
====================
*/
void idMD5Mesh::CalculateBounds( const idJointMat * entJoints, idBounds & bounds ) const {
#ifdef ID_WIN_X86_SSE2_INTRIN

	__m128 minX = vector_float_posInfinity;
	__m128 minY = vector_float_posInfinity;
	__m128 minZ = vector_float_posInfinity;
	__m128 maxX = vector_float_negInfinity;
	__m128 maxY = vector_float_negInfinity;
	__m128 maxZ = vector_float_negInfinity;
	for ( int i = 0; i < numMeshJoints; i++ ) {
		const idJointMat & joint = entJoints[meshJoints[i]];
		__m128 x = _mm_load_ps( joint.ToFloatPtr() + 0 * 4 );
		__m128 y = _mm_load_ps( joint.ToFloatPtr() + 1 * 4 );
		__m128 z = _mm_load_ps( joint.ToFloatPtr() + 2 * 4 );
		minX = _mm_min_ps( minX, x );
		minY = _mm_min_ps( minY, y );
		minZ = _mm_min_ps( minZ, z );
		maxX = _mm_max_ps( maxX, x );
		maxY = _mm_max_ps( maxY, y );
		maxZ = _mm_max_ps( maxZ, z );
	}
	__m128 expand = _mm_splat_ps( _mm_load_ss( & maxJointVertDist ), 0 );
	minX = _mm_sub_ps( minX, expand );
	minY = _mm_sub_ps( minY, expand );
	minZ = _mm_sub_ps( minZ, expand );
	maxX = _mm_add_ps( maxX, expand );
	maxY = _mm_add_ps( maxY, expand );
	maxZ = _mm_add_ps( maxZ, expand );
	_mm_store_ss( bounds.ToFloatPtr() + 0, _mm_splat_ps( minX, 3 ) );
	_mm_store_ss( bounds.ToFloatPtr() + 1, _mm_splat_ps( minY, 3 ) );
	_mm_store_ss( bounds.ToFloatPtr() + 2, _mm_splat_ps( minZ, 3 ) );
	_mm_store_ss( bounds.ToFloatPtr() + 3, _mm_splat_ps( maxX, 3 ) );
	_mm_store_ss( bounds.ToFloatPtr() + 4, _mm_splat_ps( maxY, 3 ) );
	_mm_store_ss( bounds.ToFloatPtr() + 5, _mm_splat_ps( maxZ, 3 ) );

#else

	bounds.Clear();
	for ( int i = 0; i < numMeshJoints; i++ ) {
		const idJointMat & joint = entJoints[meshJoints[i]];
		bounds.AddPoint( joint.GetTranslation() );
	}
	bounds.ExpandSelf( maxJointVertDist );

#endif
}

/*
====================
idMD5Mesh::NearestJoint
====================
*/
int idMD5Mesh::NearestJoint( int a, int b, int c ) const {
	// duplicated vertices might not have weights
	int vertNum;
	if ( a >= 0 && a < numVerts ) {
		vertNum = a;
	} else if ( b >= 0 && b < numVerts ) {
		vertNum = b;
	} else if ( c >= 0 && c < numVerts ) {
		vertNum = c;
	} else {
		// all vertices are duplicates which shouldn't happen
		return 0;
	}

	const idDrawVert & v = deformInfo->verts[vertNum];

	int bestWeight = 0;
	int bestJoint = 0;
	for ( int i = 0; i < 4; i++ ) {
		if ( v.color2[i] > bestWeight ) {
			bestWeight = v.color2[i];
			bestJoint = v.color[i];
		}
	}

	return bestJoint;
}

/***********************************************************************

	idRenderModelMD5

***********************************************************************/

/*
====================
idRenderModelMD5::ParseJoint
====================
*/
void idRenderModelMD5::ParseJoint( idLexer &parser, idMD5Joint *joint, idJointQuat *defaultPose ) {
	//
	// parse name
	//
	idToken	token;
	parser.ReadToken( &token );
	joint->name = token;

	//
	// parse parent
	//
	int num = parser.ParseInt();
	if ( num < 0 ) {
		joint->parent = NULL;
	} else {
		if ( num >= joints.Num() - 1 ) {
			parser.Error( "Invalid parent for joint '%s'", joint->name.c_str() );
		}
		joint->parent = &joints[ num ];
	}

	//
	// parse default pose
	//
	parser.Parse1DMatrix( 3, defaultPose->t.ToFloatPtr() );
	parser.Parse1DMatrix( 3, defaultPose->q.ToFloatPtr() );
	defaultPose->q.w = defaultPose->q.CalcW();
}

/*
====================
idRenderModelMD5::InitFromFile
====================
*/
void idRenderModelMD5::InitFromFile( const char *fileName ) {
	name = fileName;
	LoadModel();
}

/*
========================
idRenderModelMD5::LoadBinaryModel
========================
*/
bool idRenderModelMD5::LoadBinaryModel( idFile * file, const ID_TIME_T sourceTimeStamp ) {

	if ( !idRenderModelStatic::LoadBinaryModel( file, sourceTimeStamp ) ) {
		return false;
	}

	unsigned int magic = 0;
	file->ReadBig( magic );
	if ( magic != MD5B_MAGIC ) {
		return false;
	}

	int tempNum;
	file->ReadBig( tempNum );
	joints.SetNum( tempNum );
	for ( int i = 0; i < joints.Num(); i++ ) {
		file->ReadString( joints[i].name );
		int offset;
		file->ReadBig( offset );
		if ( offset >= 0 ) {
			joints[i].parent = joints.Ptr() + offset;
		} else {
			joints[i].parent = NULL;
		}
	}

	file->ReadBig( tempNum );
	defaultPose.SetNum( tempNum );
	for ( int i = 0; i < defaultPose.Num(); i++ ) {
		file->ReadBig( defaultPose[i].q.x );
		file->ReadBig( defaultPose[i].q.y );
		file->ReadBig( defaultPose[i].q.z );
		file->ReadBig( defaultPose[i].q.w );
		file->ReadVec3( defaultPose[i].t );
	}

	file->ReadBig( tempNum );
	invertedDefaultPose.SetNum( tempNum );
	for ( int i = 0; i < invertedDefaultPose.Num(); i++ ) {
		file->ReadBigArray( invertedDefaultPose[ i ].ToFloatPtr(), JOINTMAT_TYPESIZE );
	}
	SIMD_INIT_LAST_JOINT( invertedDefaultPose.Ptr(), joints.Num() );

	file->ReadBig( tempNum );
	meshes.SetNum( tempNum );
	for ( int i = 0; i < meshes.Num(); i++ ) {

		idStr materialName;
		file->ReadString( materialName );
		if ( materialName.IsEmpty() ) {
			meshes[i].shader = NULL;
		} else {
			meshes[i].shader = declManager->FindMaterial( materialName );
		}
		
		file->ReadBig( meshes[i].numVerts );
		file->ReadBig( meshes[i].numTris );

		file->ReadBig( meshes[i].numMeshJoints );
		meshes[i].meshJoints = (byte *) Mem_Alloc( meshes[i].numMeshJoints * sizeof( meshes[i].meshJoints[0] ), TAG_MODEL );
		file->ReadBigArray( meshes[i].meshJoints, meshes[i].numMeshJoints );
		file->ReadBig( meshes[i].maxJointVertDist );

		meshes[i].deformInfo = (deformInfo_t *)R_ClearedStaticAlloc( sizeof( deformInfo_t ) );
		deformInfo_t & deform = *meshes[i].deformInfo;

		file->ReadBig( deform.numSourceVerts );
		file->ReadBig( deform.numOutputVerts );
		file->ReadBig( deform.numIndexes );
		file->ReadBig( deform.numMirroredVerts );
		file->ReadBig( deform.numDupVerts );
		file->ReadBig( deform.numSilEdges );

		srfTriangles_t	tri;
		memset( &tri, 0, sizeof( srfTriangles_t ) );
		
		if ( deform.numOutputVerts > 0 ) {
			R_AllocStaticTriSurfVerts( &tri, deform.numOutputVerts );
			deform.verts = tri.verts;
			file->ReadBigArray( deform.verts, deform.numOutputVerts );
		}

		if ( deform.numIndexes > 0 ) {
			R_AllocStaticTriSurfIndexes( &tri, deform.numIndexes );
			R_AllocStaticTriSurfSilIndexes( &tri, deform.numIndexes );
			deform.indexes = tri.indexes;
			deform.silIndexes = tri.silIndexes;
			file->ReadBigArray( deform.indexes, deform.numIndexes );
			file->ReadBigArray( deform.silIndexes, deform.numIndexes );
		}
		
		if ( deform.numMirroredVerts > 0 ) {
			R_AllocStaticTriSurfMirroredVerts( &tri, deform.numMirroredVerts );
			deform.mirroredVerts = tri.mirroredVerts;
			file->ReadBigArray( deform.mirroredVerts, deform.numMirroredVerts );
		}

		if ( deform.numDupVerts > 0 ) {
			R_AllocStaticTriSurfDupVerts( &tri, deform.numDupVerts );
			deform.dupVerts = tri.dupVerts;
			file->ReadBigArray( deform.dupVerts, deform.numDupVerts * 2 );
		}

		if ( deform.numSilEdges > 0 ) {
			R_AllocStaticTriSurfSilEdges( &tri, deform.numSilEdges );
			deform.silEdges = tri.silEdges;
			assert( deform.silEdges != NULL );
			for ( int j = 0; j < deform.numSilEdges; j++ ) {
				file->ReadBig( deform.silEdges[j].p1 );
				file->ReadBig( deform.silEdges[j].p2 );
				file->ReadBig( deform.silEdges[j].v1 );
				file->ReadBig( deform.silEdges[j].v2 );
			}
		}

		idShadowVertSkinned * shadowVerts = (idShadowVertSkinned *) Mem_Alloc( ALIGN( deform.numOutputVerts * 2 * sizeof( idShadowVertSkinned ), 16 ), TAG_MODEL );
		idShadowVertSkinned::CreateShadowCache( shadowVerts, deform.verts, deform.numOutputVerts );

		deform.staticAmbientCache = vertexCache.AllocStaticVertex( deform.verts, ALIGN( deform.numOutputVerts * sizeof( idDrawVert ), VERTEX_CACHE_ALIGN ) );
		deform.staticIndexCache = vertexCache.AllocStaticIndex( deform.indexes, ALIGN( deform.numIndexes * sizeof( triIndex_t ), INDEX_CACHE_ALIGN ) );
		deform.staticShadowCache = vertexCache.AllocStaticVertex( shadowVerts, ALIGN( deform.numOutputVerts * 2 * sizeof( idShadowVertSkinned ), VERTEX_CACHE_ALIGN ) );

		Mem_Free( shadowVerts );

		file->ReadBig( meshes[i].surfaceNum );
	}

	return true;
}

/*
========================
idRenderModelMD5::WriteBinaryModel
========================
*/
void idRenderModelMD5::WriteBinaryModel( idFile * file, ID_TIME_T *_timeStamp ) const {

	idRenderModelStatic::WriteBinaryModel( file );

	if ( file == NULL ) {
		return;
	}

	file->WriteBig( MD5B_MAGIC );

	file->WriteBig( joints.Num() );
	for ( int i = 0; i < joints.Num(); i++ ) {
		file->WriteString( joints[i].name );
		int offset = -1;
		if ( joints[i].parent != NULL ) {
			offset = joints[i].parent - joints.Ptr();
		}
		file->WriteBig( offset );
	}

	file->WriteBig( defaultPose.Num() );
	for ( int i = 0; i < defaultPose.Num(); i++ ) {
		file->WriteBig( defaultPose[i].q.x );
		file->WriteBig( defaultPose[i].q.y );
		file->WriteBig( defaultPose[i].q.z );
		file->WriteBig( defaultPose[i].q.w );
		file->WriteVec3( defaultPose[i].t );
	}

	file->WriteBig( invertedDefaultPose.Num() );
	for ( int i = 0; i < invertedDefaultPose.Num(); i++ ) {
		file->WriteBigArray( invertedDefaultPose[ i ].ToFloatPtr(), JOINTMAT_TYPESIZE );
	}

	file->WriteBig( meshes.Num() );
	for ( int i = 0; i < meshes.Num(); i++ ) {

		if ( meshes[i].shader != NULL && meshes[i].shader->GetName() != NULL ) {
			file->WriteString( meshes[i].shader->GetName() );
		} else {
			file->WriteString( "" );
		}

		file->WriteBig( meshes[i].numVerts );
		file->WriteBig( meshes[i].numTris );

		file->WriteBig( meshes[i].numMeshJoints );
		file->WriteBigArray( meshes[i].meshJoints, meshes[i].numMeshJoints );
		file->WriteBig( meshes[i].maxJointVertDist );

		deformInfo_t & deform = *meshes[i].deformInfo;

		file->WriteBig( deform.numSourceVerts );
		file->WriteBig( deform.numOutputVerts );
		file->WriteBig( deform.numIndexes );
		file->WriteBig( deform.numMirroredVerts );
		file->WriteBig( deform.numDupVerts );
		file->WriteBig( deform.numSilEdges );

		if ( deform.numOutputVerts > 0 ) {
			file->WriteBigArray( deform.verts, deform.numOutputVerts );
		}

		if ( deform.numIndexes > 0 ) {
			file->WriteBigArray( deform.indexes, deform.numIndexes );
			file->WriteBigArray( deform.silIndexes, deform.numIndexes );
		}

		if ( deform.numMirroredVerts > 0 ) {
			file->WriteBigArray( deform.mirroredVerts, deform.numMirroredVerts );
		}

		if ( deform.numDupVerts > 0 ) {
			file->WriteBigArray( deform.dupVerts, deform.numDupVerts * 2 );
		}

		if ( deform.numSilEdges > 0 ) {
			for ( int j = 0; j < deform.numSilEdges; j++ ) {
				file->WriteBig( deform.silEdges[j].p1 );
				file->WriteBig( deform.silEdges[j].p2 );
				file->WriteBig( deform.silEdges[j].v1 );
				file->WriteBig( deform.silEdges[j].v2 );
			}
		}

		file->WriteBig( meshes[i].surfaceNum );
	}
}

/*
====================
idRenderModelMD5::LoadModel

used for initial loads, reloadModel, and reloading the data of purged models
Upon exit, the model will absolutely be valid, but possibly as a default model
====================
*/
void idRenderModelMD5::LoadModel() {

	int			version;
	int			num;
	int			parentNum;
	idToken		token;
	idLexer		parser( LEXFL_ALLOWPATHNAMES | LEXFL_NOSTRINGESCAPECHARS );

	if ( !purged ) {
		PurgeModel();
	}
	purged = false;

	if ( !parser.LoadFile( name ) ) {
		MakeDefaultModel();
		return;
	}

	parser.ExpectTokenString( MD5_VERSION_STRING );
	version = parser.ParseInt();

	if ( version != MD5_VERSION ) {
		parser.Error( "Invalid version %d.  Should be version %d\n", version, MD5_VERSION );
	}

	//
	// skip commandline
	//
	parser.ExpectTokenString( "commandline" );
	parser.ReadToken( &token );

	// parse num joints
	parser.ExpectTokenString( "numJoints" );
	num  = parser.ParseInt();
	joints.SetGranularity( 1 );
	joints.SetNum( num );
	defaultPose.SetGranularity( 1 );
	defaultPose.SetNum( num );

	// parse num meshes
	parser.ExpectTokenString( "numMeshes" );
	num = parser.ParseInt();
	if ( num < 0 ) {
		parser.Error( "Invalid size: %d", num );
	}
	meshes.SetGranularity( 1 );
	meshes.SetNum( num );

	//
	// parse joints
	//
	parser.ExpectTokenString( "joints" );
	parser.ExpectTokenString( "{" );
	idJointMat *poseMat = ( idJointMat * )_alloca16( joints.Num() * sizeof( poseMat[0] ) );
	for( int i = 0; i < joints.Num(); i++ ) {
		idMD5Joint * joint = &joints[i];
		idJointQuat	* pose = &defaultPose[i];

		ParseJoint( parser, joint, pose );
		poseMat[ i ].SetRotation( pose->q.ToMat3() );
		poseMat[ i ].SetTranslation( pose->t );
		if ( joint->parent ) {
			parentNum = joint->parent - joints.Ptr();
			pose->q = ( poseMat[ i ].ToMat3() * poseMat[ parentNum ].ToMat3().Transpose() ).ToQuat();
			pose->t = ( poseMat[ i ].ToVec3() - poseMat[ parentNum ].ToVec3() ) * poseMat[ parentNum ].ToMat3().Transpose();
		}
	}
	parser.ExpectTokenString( "}" );

	//-----------------------------------------
	// create the inverse of the base pose joints to support tech6 style deformation
	// of base pose vertexes, normals, and tangents.
	//
	// vertex * joints * inverseJoints == vertex when joints is the base pose
	// When the joints are in another pose, it gives the animated vertex position
	//-----------------------------------------
	invertedDefaultPose.SetNum( SIMD_ROUND_JOINTS( joints.Num() ) );
	for ( int i = 0; i < joints.Num(); i++ ) {
		invertedDefaultPose[i] = poseMat[i];
		invertedDefaultPose[i].Invert();
	}
	SIMD_INIT_LAST_JOINT( invertedDefaultPose.Ptr(), joints.Num() );

	for ( int i = 0; i < meshes.Num(); i++ ) {
		parser.ExpectTokenString( "mesh" );
		meshes[i].ParseMesh( parser, defaultPose.Num(), poseMat );
	}

	// calculate the bounds of the model
	bounds.Clear();
	for ( int i = 0; i < meshes.Num(); i++ ) {
		idBounds meshBounds;
		meshes[i].CalculateBounds( poseMat, meshBounds );
		bounds.AddBounds( meshBounds );
	}

	// set the timestamp for reloadmodels
	fileSystem->ReadFile( name, NULL, &timeStamp );

	common->UpdateLevelLoadPacifier();
}

/*
==============
idRenderModelMD5::Print
==============
*/
void idRenderModelMD5::Print() const {
	common->Printf( "%s\n", name.c_str() );
	common->Printf( "Dynamic model.\n" );
	common->Printf( "Generated smooth normals.\n" );
	common->Printf( "    verts  tris weights material\n" );
	int	totalVerts = 0;
	int	totalTris = 0;
	const idMD5Mesh * mesh = meshes.Ptr();
	for ( int i = 0; i < meshes.Num(); i++, mesh++ ) {
		totalVerts += mesh->NumVerts();
		totalTris += mesh->NumTris();
		common->Printf( "%2i: %5i %5i %s\n", i, mesh->NumVerts(), mesh->NumTris(), mesh->shader->GetName() );
	}	
	common->Printf( "-----\n" );
	common->Printf( "%4i verts.\n", totalVerts );
	common->Printf( "%4i tris.\n", totalTris );
	common->Printf( "%4i joints.\n", joints.Num() );
}

/*
==============
idRenderModelMD5::List
==============
*/
void idRenderModelMD5::List() const {
	int			i;
	const idMD5Mesh	*mesh;
	int			totalTris = 0;
	int			totalVerts = 0;

	for( mesh = meshes.Ptr(), i = 0; i < meshes.Num(); i++, mesh++ ) {
		totalTris += mesh->numTris;
		totalVerts += mesh->NumVerts();
	}
	common->Printf( " %4ik %3i %4i %4i %s(MD5)", Memory()/1024, meshes.Num(), totalVerts, totalTris, Name() );

	if ( defaulted ) {
		common->Printf( " (DEFAULTED)" );
	}

	common->Printf( "\n" );
}

/*
====================
idRenderModelMD5::Bounds

This calculates a rough bounds by using the joint radii without
transforming all the points
====================
*/
idBounds idRenderModelMD5::Bounds( const renderEntity_t *ent ) const {
	if ( ent == NULL ) {
		// this is the bounds for the reference pose
		return bounds;
	}

	return ent->bounds;
}

/*
====================
idRenderModelMD5::DrawJoints
====================
*/
void idRenderModelMD5::DrawJoints( const renderEntity_t *ent, const viewDef_t *view ) const {
	int					i;
	int					num;
	idVec3				pos;
	const idJointMat	*joint;
	const idMD5Joint	*md5Joint;
	int					parentNum;

	num = ent->numJoints;
	joint = ent->joints;
	md5Joint = joints.Ptr();	
	for( i = 0; i < num; i++, joint++, md5Joint++ ) {
		pos = ent->origin + joint->ToVec3() * ent->axis;
		if ( md5Joint->parent ) {
			parentNum = md5Joint->parent - joints.Ptr();
			common->RW()->DebugLine( colorWhite, ent->origin + ent->joints[ parentNum ].ToVec3() * ent->axis, pos );
		}

		common->RW()->DebugLine( colorRed,	pos, pos + joint->ToMat3()[ 0 ] * 2.0f * ent->axis );
		common->RW()->DebugLine( colorGreen,pos, pos + joint->ToMat3()[ 1 ] * 2.0f * ent->axis );
		common->RW()->DebugLine( colorBlue,	pos, pos + joint->ToMat3()[ 2 ] * 2.0f * ent->axis );
	}

	idBounds bounds;

	bounds.FromTransformedBounds( ent->bounds, vec3_zero, ent->axis );
	common->RW()->DebugBounds( colorMagenta, bounds, ent->origin );

	if ( ( r_jointNameScale.GetFloat() != 0.0f ) && ( bounds.Expand( 128.0f ).ContainsPoint( view->renderView.vieworg - ent->origin ) ) ) {
		idVec3	offset( 0, 0, r_jointNameOffset.GetFloat() );
		float	scale;

		scale = r_jointNameScale.GetFloat();
		joint = ent->joints;
		num = ent->numJoints;
		for( i = 0; i < num; i++, joint++ ) {
			pos = ent->origin + joint->ToVec3() * ent->axis;
			common->RW()->DrawText( joints[ i ].name, pos + offset, scale, colorWhite, view->renderView.viewaxis, 1 );
		}
	}
}

/*
====================
TransformJoints
====================
*/
static void TransformJoints( idJointMat *__restrict outJoints, const int numJoints, const idJointMat *__restrict inJoints1, const idJointMat *__restrict inJoints2 ) {

	float * outFloats = outJoints->ToFloatPtr();
	const float * inFloats1 = inJoints1->ToFloatPtr();
	const float * inFloats2 = inJoints2->ToFloatPtr();

	assert_16_byte_aligned( outFloats );
	assert_16_byte_aligned( inFloats1 );
	assert_16_byte_aligned( inFloats2 );

#ifdef ID_WIN_X86_SSE2_INTRIN

	const __m128 mask_keep_last = __m128c( _mm_set_epi32( 0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000 ) );

	for ( int i = 0; i < numJoints; i += 2, inFloats1 += 2 * 12, inFloats2 += 2 * 12, outFloats += 2 * 12 ) {
		__m128 m1a0 = _mm_load_ps( inFloats1 + 0 * 12 + 0 );
		__m128 m1b0 = _mm_load_ps( inFloats1 + 0 * 12 + 4 );
		__m128 m1c0 = _mm_load_ps( inFloats1 + 0 * 12 + 8 );
		__m128 m1a1 = _mm_load_ps( inFloats1 + 1 * 12 + 0 );
		__m128 m1b1 = _mm_load_ps( inFloats1 + 1 * 12 + 4 );
		__m128 m1c1 = _mm_load_ps( inFloats1 + 1 * 12 + 8 );

		__m128 m2a0 = _mm_load_ps( inFloats2 + 0 * 12 + 0 );
		__m128 m2b0 = _mm_load_ps( inFloats2 + 0 * 12 + 4 );
		__m128 m2c0 = _mm_load_ps( inFloats2 + 0 * 12 + 8 );
		__m128 m2a1 = _mm_load_ps( inFloats2 + 1 * 12 + 0 );
		__m128 m2b1 = _mm_load_ps( inFloats2 + 1 * 12 + 4 );
		__m128 m2c1 = _mm_load_ps( inFloats2 + 1 * 12 + 8 );

		__m128 tj0 = _mm_and_ps( m1a0, mask_keep_last );
		__m128 tk0 = _mm_and_ps( m1b0, mask_keep_last );
		__m128 tl0 = _mm_and_ps( m1c0, mask_keep_last );
		__m128 tj1 = _mm_and_ps( m1a1, mask_keep_last );
		__m128 tk1 = _mm_and_ps( m1b1, mask_keep_last );
		__m128 tl1 = _mm_and_ps( m1c1, mask_keep_last );

		__m128 ta0 = _mm_splat_ps( m1a0, 0 );
		__m128 td0 = _mm_splat_ps( m1b0, 0 );
		__m128 tg0 = _mm_splat_ps( m1c0, 0 );
		__m128 ta1 = _mm_splat_ps( m1a1, 0 );
		__m128 td1 = _mm_splat_ps( m1b1, 0 );
		__m128 tg1 = _mm_splat_ps( m1c1, 0 );

		__m128 ra0 = _mm_add_ps( tj0, _mm_mul_ps( ta0, m2a0 ) );
		__m128 rd0 = _mm_add_ps( tk0, _mm_mul_ps( td0, m2a0 ) );
		__m128 rg0 = _mm_add_ps( tl0, _mm_mul_ps( tg0, m2a0 ) );
		__m128 ra1 = _mm_add_ps( tj1, _mm_mul_ps( ta1, m2a1 ) );
		__m128 rd1 = _mm_add_ps( tk1, _mm_mul_ps( td1, m2a1 ) );
		__m128 rg1 = _mm_add_ps( tl1, _mm_mul_ps( tg1, m2a1 ) );

		__m128 tb0 = _mm_splat_ps( m1a0, 1 );
		__m128 te0 = _mm_splat_ps( m1b0, 1 );
		__m128 th0 = _mm_splat_ps( m1c0, 1 );
		__m128 tb1 = _mm_splat_ps( m1a1, 1 );
		__m128 te1 = _mm_splat_ps( m1b1, 1 );
		__m128 th1 = _mm_splat_ps( m1c1, 1 );

		__m128 rb0 = _mm_add_ps( ra0, _mm_mul_ps( tb0, m2b0 ) );
		__m128 re0 = _mm_add_ps( rd0, _mm_mul_ps( te0, m2b0 ) );
		__m128 rh0 = _mm_add_ps( rg0, _mm_mul_ps( th0, m2b0 ) );
		__m128 rb1 = _mm_add_ps( ra1, _mm_mul_ps( tb1, m2b1 ) );
		__m128 re1 = _mm_add_ps( rd1, _mm_mul_ps( te1, m2b1 ) );
		__m128 rh1 = _mm_add_ps( rg1, _mm_mul_ps( th1, m2b1 ) );

		__m128 tc0 = _mm_splat_ps( m1a0, 2 );
		__m128 tf0 = _mm_splat_ps( m1b0, 2 );
		__m128 ti0 = _mm_splat_ps( m1c0, 2 );
		__m128 tf1 = _mm_splat_ps( m1b1, 2 );
		__m128 ti1 = _mm_splat_ps( m1c1, 2 );
		__m128 tc1 = _mm_splat_ps( m1a1, 2 );

		__m128 rc0 = _mm_add_ps( rb0, _mm_mul_ps( tc0, m2c0 ) );
		__m128 rf0 = _mm_add_ps( re0, _mm_mul_ps( tf0, m2c0 ) );
		__m128 ri0 = _mm_add_ps( rh0, _mm_mul_ps( ti0, m2c0 ) );
		__m128 rc1 = _mm_add_ps( rb1, _mm_mul_ps( tc1, m2c1 ) );
		__m128 rf1 = _mm_add_ps( re1, _mm_mul_ps( tf1, m2c1 ) );
		__m128 ri1 = _mm_add_ps( rh1, _mm_mul_ps( ti1, m2c1 ) );

		_mm_store_ps( outFloats + 0 * 12 + 0, rc0 );
		_mm_store_ps( outFloats + 0 * 12 + 4, rf0 );
		_mm_store_ps( outFloats + 0 * 12 + 8, ri0 );
		_mm_store_ps( outFloats + 1 * 12 + 0, rc1 );
		_mm_store_ps( outFloats + 1 * 12 + 4, rf1 );
		_mm_store_ps( outFloats + 1 * 12 + 8, ri1 );
	}

#else

	for ( int i = 0; i < numJoints; i++ ) {
		idJointMat::Multiply( outJoints[i], inJoints1[i], inJoints2[i] );
	}

#endif
}

/*
====================
idRenderModelMD5::InstantiateDynamicModel
====================
*/
idRenderModel *idRenderModelMD5::InstantiateDynamicModel( const struct renderEntity_s *ent, const viewDef_t *view, idRenderModel *cachedModel ) {
	if ( cachedModel != NULL && !r_useCachedDynamicModels.GetBool() ) {
		delete cachedModel;
		cachedModel = NULL;
	}

	if ( purged ) {
		common->DWarning( "model %s instantiated while purged", Name() );
		LoadModel();
	}

	if ( !ent->joints ) {
		common->Printf( "idRenderModelMD5::InstantiateDynamicModel: NULL joints on renderEntity for '%s'\n", Name() );
		delete cachedModel;
		return NULL;
	} else if ( ent->numJoints != joints.Num() ) {
		common->Printf( "idRenderModelMD5::InstantiateDynamicModel: renderEntity has different number of joints than model for '%s'\n", Name() );
		delete cachedModel;
		return NULL;
	}

	tr.pc.c_generateMd5++;

	idRenderModelStatic * staticModel;
	if ( cachedModel != NULL ) {
		assert( dynamic_cast<idRenderModelStatic *>(cachedModel) != NULL );
		assert( idStr::Icmp( cachedModel->Name(), MD5_SnapshotName ) == 0 );
		staticModel = static_cast<idRenderModelStatic *>(cachedModel);
	} else {
		staticModel = new (TAG_MODEL) idRenderModelStatic;
		staticModel->InitEmpty( MD5_SnapshotName );
	}

	staticModel->bounds.Clear();

	if ( r_showSkel.GetInteger() ) {
		if ( ( view != NULL ) && ( !r_skipSuppress.GetBool() || !ent->suppressSurfaceInViewID || ( ent->suppressSurfaceInViewID != view->renderView.viewID ) ) ) {
			// only draw the skeleton
			DrawJoints( ent, view );
		}

		if ( r_showSkel.GetInteger() > 1 ) {
			// turn off the model when showing the skeleton
			staticModel->InitEmpty( MD5_SnapshotName );
			return staticModel;
		}
	}

	// update the GPU joints array
	const int numInvertedJoints = SIMD_ROUND_JOINTS( joints.Num() );
	if ( staticModel->jointsInverted == NULL ) {
		staticModel->numInvertedJoints = numInvertedJoints;
		const int alignment = glConfig.uniformBufferOffsetAlignment;
		staticModel->jointsInverted = (idJointMat *)Mem_ClearedAlloc( ALIGN( numInvertedJoints * sizeof( idJointMat ), alignment ), TAG_JOINTMAT );
		staticModel->jointsInvertedBuffer = 0;
	} else {
		assert( staticModel->numInvertedJoints == numInvertedJoints );
	}

	TransformJoints( staticModel->jointsInverted, joints.Num(), ent->joints, invertedDefaultPose.Ptr() );

	// create all the surfaces
	idMD5Mesh * mesh = meshes.Ptr();
	for ( int i = 0; i < meshes.Num(); i++, mesh++ ) {
		// avoid deforming the surface if it will be a nodraw due to a skin remapping
		const idMaterial *shader = mesh->shader;
		
		shader = R_RemapShaderBySkin( shader, ent->customSkin, ent->customShader );
		
		if ( !shader || ( !shader->IsDrawn() && !shader->SurfaceCastsShadow() ) ) {
			staticModel->DeleteSurfaceWithId( i );
			mesh->surfaceNum = -1;
			continue;
		}

		modelSurface_t *surf;

		int surfaceNum = 0;
		if ( staticModel->FindSurfaceWithId( i, surfaceNum ) ) {
			mesh->surfaceNum = surfaceNum;
			surf = &staticModel->surfaces[surfaceNum];
		} else {
			mesh->surfaceNum = staticModel->NumSurfaces();
			surf = &staticModel->surfaces.Alloc();
			surf->geometry = NULL;
			surf->shader = NULL;
			surf->id = i;
		}

		mesh->UpdateSurface( ent, ent->joints, staticModel->jointsInverted, surf );
		assert( surf->geometry != NULL );	// to get around compiler warning

		// the deformation of the tangents can be deferred until each surface is added to the view
		surf->geometry->staticModelWithJoints = staticModel;
	
		staticModel->bounds.AddBounds( surf->geometry->bounds );
	}

	return staticModel;
}

/*
====================
idRenderModelMD5::IsDynamicModel
====================
*/
dynamicModel_t idRenderModelMD5::IsDynamicModel() const {
	return DM_CACHED;
}

/*
====================
idRenderModelMD5::NumJoints
====================
*/
int idRenderModelMD5::NumJoints() const {
	return joints.Num();
}

/*
====================
idRenderModelMD5::GetJoints
====================
*/
const idMD5Joint *idRenderModelMD5::GetJoints() const {
	return joints.Ptr();
}

/*
====================
idRenderModelMD5::GetDefaultPose
====================
*/
const idJointQuat *idRenderModelMD5::GetDefaultPose() const {
	return defaultPose.Ptr();
}

/*
====================
idRenderModelMD5::GetJointHandle
====================
*/
jointHandle_t idRenderModelMD5::GetJointHandle( const char *name ) const {
	const idMD5Joint *joint = joints.Ptr();
	for ( int i = 0; i < joints.Num(); i++, joint++ ) {
		if ( idStr::Icmp( joint->name.c_str(), name ) == 0 ) {
			return ( jointHandle_t )i;
		}
	}

	return INVALID_JOINT;
}

/*
=====================
idRenderModelMD5::GetJointName
=====================
*/
const char *idRenderModelMD5::GetJointName( jointHandle_t handle ) const {
	if ( ( handle < 0 ) || ( handle >= joints.Num() ) ) {
		return "<invalid joint>";
	}

	return joints[ handle ].name;
}

/*
====================
idRenderModelMD5::NearestJoint
====================
*/
int idRenderModelMD5::NearestJoint( int surfaceNum, int a, int b, int c ) const {
	if ( surfaceNum > meshes.Num() ) {
		common->Error( "idRenderModelMD5::NearestJoint: surfaceNum > meshes.Num()" );
	}

	const idMD5Mesh *mesh = meshes.Ptr();
	for ( int i = 0; i < meshes.Num(); i++, mesh++ ) {
		if ( mesh->surfaceNum == surfaceNum ) {
			return mesh->NearestJoint( a, b, c );
		}
	}
	return 0;
}

/*
====================
idRenderModelMD5::TouchData

models that are already loaded at level start time
will still touch their materials to make sure they
are kept loaded
====================
*/
void idRenderModelMD5::TouchData() {
	for ( int i = 0; i < meshes.Num(); i++ ) {
		declManager->FindMaterial( meshes[i].shader->GetName() );
	}
}

/*
===================
idRenderModelMD5::PurgeModel

frees all the data, but leaves the class around for dangling references,
which can regenerate the data with LoadModel()
===================
*/
void idRenderModelMD5::PurgeModel() {
	purged = true;
	joints.Clear();
	defaultPose.Clear();
	meshes.Clear();
}

/*
===================
idRenderModelMD5::Memory
===================
*/
int	idRenderModelMD5::Memory() const {
	int total = sizeof( *this );
	total += joints.MemoryUsed() + defaultPose.MemoryUsed() + meshes.MemoryUsed();

	// count up strings
	for ( int i = 0; i < joints.Num(); i++ ) {
		total += joints[i].name.DynamicMemoryUsed();
	}

	// count up meshes
	for ( int i = 0; i < meshes.Num(); i++ ) {
		const idMD5Mesh *mesh = &meshes[i];

		total += mesh->numMeshJoints * sizeof( mesh->meshJoints[0] );

		// sum up deform info
		total += sizeof( mesh->deformInfo );
		total += R_DeformInfoMemoryUsed( mesh->deformInfo );
	}
	return total;
}