tf2/tf2_src/studiorender/r_studiodraw.cpp

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=====================================================================================//

#include "studiorender.h"
#include "studio.h"
#include "materialsystem/imesh.h"
#include "materialsystem/imaterialsystemhardwareconfig.h"
#include "materialsystem/imaterialvar.h"
#include "materialsystem/imorph.h"
#include "materialsystem/itexture.h"
#include "materialsystem/imaterial.h"
#include "optimize.h"
#include "mathlib/mathlib.h"
#include "mathlib/vector.h"
#include <malloc.h>
#include "mathlib/vmatrix.h"
#include "studiorendercontext.h"
#include "tier2/tier2.h"
#include "tier0/vprof.h"

//#define PROFILE_STUDIO VPROF
#define PROFILE_STUDIO

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

typedef void (*SoftwareProcessMeshFunc_t)( const mstudio_meshvertexdata_t *, matrix3x4_t *pPoseToWorld,
	CCachedRenderData &vertexCache, CMeshBuilder& meshBuilder, int numVertices, unsigned short* pGroupToMesh, unsigned int nAlphaMask,
											  IMaterial *pMaterial);

//-----------------------------------------------------------------------------
// Forward declarations
//-----------------------------------------------------------------------------

class IClientEntity;


static int boxpnt[6][4] = 
{
	{ 0, 4, 6, 2 }, // +X
	{ 0, 1, 5, 4 }, // +Y
	{ 0, 2, 3, 1 }, // +Z
	{ 7, 5, 1, 3 }, // -X
	{ 7, 3, 2, 6 }, // -Y
	{ 7, 6, 4, 5 }, // -Z
};	

static TableVector	hullcolor[8] = 
{
	{ 1.0, 1.0, 1.0 },
	{ 1.0, 0.5, 0.5 },
	{ 0.5, 1.0, 0.5 },
	{ 1.0, 1.0, 0.5 },
	{ 0.5, 0.5, 1.0 },
	{ 1.0, 0.5, 1.0 },
	{ 0.5, 1.0, 1.0 },
	{ 1.0, 1.0, 1.0 }
};


//-----------------------------------------------------------------------------
// 
//-----------------------------------------------------------------------------
static unsigned int s_nTranslucentModelHullCache = 0;
static unsigned int s_nSolidModelHullCache = 0;
void CStudioRender::R_StudioDrawHulls( int hitboxset, bool translucent )
{
	int			i, j;
//	float		lv;
	Vector		tmp;
	Vector		p[8];
	mstudiobbox_t		*pbbox;
	IMaterialVar *colorVar;

	mstudiohitboxset_t *s = m_pStudioHdr->pHitboxSet( hitboxset );
	if ( !s )
		return;

	pbbox		= s->pHitbox( 0 );
	if ( !pbbox )
		return;

	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	if( translucent )
	{
		pRenderContext->Bind( m_pMaterialTranslucentModelHulls );
		colorVar = m_pMaterialTranslucentModelHulls->FindVarFast( "$color", &s_nTranslucentModelHullCache );
	}
	else
	{
		pRenderContext->Bind( m_pMaterialSolidModelHulls );
		colorVar = m_pMaterialSolidModelHulls->FindVarFast( "$color", &s_nSolidModelHullCache );
	}


	for (i = 0; i < s->numhitboxes; i++)
	{
		for (j = 0; j < 8; j++)
		{
			tmp[0] = (j & 1) ? pbbox[i].bbmin[0] : pbbox[i].bbmax[0];
			tmp[1] = (j & 2) ? pbbox[i].bbmin[1] : pbbox[i].bbmax[1];
			tmp[2] = (j & 4) ? pbbox[i].bbmin[2] : pbbox[i].bbmax[2];

			VectorTransform( tmp, m_pBoneToWorld[pbbox[i].bone], p[j] );
		}

		j = (pbbox[i].group % 8);
		g_pMaterialSystem->Flush();
		if( colorVar )
		{
			if( translucent )
			{
				colorVar->SetVecValue( 0.2f * hullcolor[j].x, 0.2f * hullcolor[j].y, 0.2f * hullcolor[j].z );
			}
			else
			{
				colorVar->SetVecValue( hullcolor[j].x, hullcolor[j].y, hullcolor[j].z );
			}
		}
		for (j = 0; j < 6; j++)
		{
#if 0
			tmp[0] = tmp[1] = tmp[2] = 0;
			tmp[j % 3] = (j < 3) ? 1.0 : -1.0;
			// R_StudioLighting( &lv, pbbox[i].bone, 0, tmp ); // BUG: not updated
#endif

			IMesh* pMesh = pRenderContext->GetDynamicMesh();
			CMeshBuilder meshBuilder;
			meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );

			for (int k = 0; k < 4; ++k)
			{
				meshBuilder.Position3fv( p[boxpnt[j][k]].Base() );
				meshBuilder.AdvanceVertex();
			}
			
			meshBuilder.End();
			pMesh->Draw();
		}
	}
}


void CStudioRender::R_StudioDrawBones (void)
{
	int			i, j, k;
//	float		lv;
	Vector		tmp;
	Vector		p[8];
	Vector		up, right, forward;
	Vector		a1;
	mstudiobone_t		*pbones;
	Vector		positionArray[4];

	pbones		= m_pStudioHdr->pBone( 0 );

	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );

	for (i = 0; i < m_pStudioHdr->numbones; i++)
	{
		if (pbones[i].parent == -1)
			continue;

		k = pbones[i].parent;

		a1[0] = a1[1] = a1[2] = 1.0;
		up[0] = m_pBoneToWorld[i][0][3] - m_pBoneToWorld[k][0][3];
		up[1] = m_pBoneToWorld[i][1][3] - m_pBoneToWorld[k][1][3];
		up[2] = m_pBoneToWorld[i][2][3] - m_pBoneToWorld[k][2][3];
		if (up[0] > up[1])
			if (up[0] > up[2])
				a1[0] = 0.0;
			else
				a1[2] = 0.0;
		else
			if (up[1] > up[2])
				a1[1] = 0.0;
			else
				a1[2] = 0.0;
		CrossProduct( up, a1, right );
		VectorNormalize( right );
		CrossProduct( up, right, forward );
		VectorNormalize( forward );
		VectorScale( right, 2.0, right );
		VectorScale( forward, 2.0, forward );

		for (j = 0; j < 8; j++)
		{
			p[j][0] = m_pBoneToWorld[k][0][3];
			p[j][1] = m_pBoneToWorld[k][1][3];
			p[j][2] = m_pBoneToWorld[k][2][3];

			if (j & 1)
			{
				VectorSubtract( p[j], right, p[j] );
			}
			else
			{
				VectorAdd( p[j], right, p[j] );
			}

			if (j & 2)
			{
				VectorSubtract( p[j], forward, p[j] );
			}
			else
			{
				VectorAdd( p[j], forward, p[j] );
			}

			if (j & 4)
			{ 
			}
			else
			{
				VectorAdd( p[j], up, p[j] );
			}
		}

		VectorNormalize( up );
		VectorNormalize( right );
		VectorNormalize( forward );

		pRenderContext->Bind( m_pMaterialModelBones );
		
		for (j = 0; j < 6; j++)
		{
			switch( j)
			{
			case 0:	VectorCopy( right, tmp ); break;
			case 1:	VectorCopy( forward, tmp ); break;
			case 2:	VectorCopy( up, tmp ); break;
			case 3:	VectorScale( right, -1, tmp ); break;
			case 4:	VectorScale( forward, -1, tmp ); break;
			case 5:	VectorScale( up, -1, tmp ); break;
			}
			// R_StudioLighting( &lv, -1, 0, tmp );  // BUG: not updated

			IMesh* pMesh = pRenderContext->GetDynamicMesh();
			CMeshBuilder meshBuilder;
			meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );

			for (int k = 0; k < 4; ++k)
			{
				meshBuilder.Position3fv( p[boxpnt[j][k]].Base() );
				meshBuilder.AdvanceVertex();
			}
			
			meshBuilder.End();
			pMesh->Draw();
		}
	}
}


int CStudioRender::R_StudioRenderModel( IMatRenderContext *pRenderContext, int skin, 
	int body, int hitboxset, void /*IClientEntity*/ *pEntity,
	IMaterial **ppMaterials, int *pMaterialFlags, int flags, int boneMask, int lod, ColorMeshInfo_t *pColorMeshes )
{
	VPROF("CStudioRender::R_StudioRenderModel");

	int nDrawGroup = flags & STUDIORENDER_DRAW_GROUP_MASK;

	if ( m_pRC->m_Config.drawEntities == 2 )
	{
		if ( nDrawGroup != STUDIORENDER_DRAW_TRANSLUCENT_ONLY )
		{
			R_StudioDrawBones( );
		}
		return 0;
	}

	if ( m_pRC->m_Config.drawEntities == 3 )
	{
		if ( nDrawGroup != STUDIORENDER_DRAW_TRANSLUCENT_ONLY )
		{
			R_StudioDrawHulls( hitboxset, false );
		}
		return 0;
	}

	// BUG: This method is crap, though less crap than before.  It should just sort 
	// the materials though it'll need to sort at render time as "skin" 
	// can change what materials a given mesh may use
	int numTrianglesRendered = 0;

	// don't try to use these if not supported
	if ( IsPC() && !g_pMaterialSystemHardwareConfig->SupportsColorOnSecondStream() )
	{
		pColorMeshes = NULL;
	}

	// Build list of submodels
	BodyPartInfo_t *pBodyPartInfo = (BodyPartInfo_t*)_alloca( m_pStudioHdr->numbodyparts * sizeof(BodyPartInfo_t) );
	for ( int i=0 ; i < m_pStudioHdr->numbodyparts; ++i ) 
	{
		pBodyPartInfo[i].m_nSubModelIndex = R_StudioSetupModel( i, body, &pBodyPartInfo[i].m_pSubModel, m_pStudioHdr );
	}

	// mark possible translucent meshes
	if ( nDrawGroup != STUDIORENDER_DRAW_TRANSLUCENT_ONLY )
	{
		// we're going to render the opaque meshes, so these will get counted in that pass
		m_bSkippedMeshes = false;
		m_bDrawTranslucentSubModels = false;
		numTrianglesRendered += R_StudioRenderFinal( pRenderContext, skin, m_pStudioHdr->numbodyparts, pBodyPartInfo, 
			pEntity, ppMaterials, pMaterialFlags, boneMask, lod, pColorMeshes );
	}
	else
	{
		m_bSkippedMeshes = true;
	}

	if ( m_bSkippedMeshes && nDrawGroup != STUDIORENDER_DRAW_OPAQUE_ONLY )
	{
		m_bDrawTranslucentSubModels = true;
		numTrianglesRendered += R_StudioRenderFinal( pRenderContext, skin, m_pStudioHdr->numbodyparts, pBodyPartInfo, 
			pEntity, ppMaterials, pMaterialFlags, boneMask, lod, pColorMeshes );
	}
	return numTrianglesRendered;
}


//-----------------------------------------------------------------------------
// Generate morph accumulator
//-----------------------------------------------------------------------------
void CStudioRender::GenerateMorphAccumulator( mstudiomodel_t *pSubModel )
{
	// Deal with all flexes
	// FIXME: HW Morphing doesn't work with translucent models yet
	if ( !m_pRC->m_Config.m_bEnableHWMorph || !m_pRC->m_Config.bFlex || m_bDrawTranslucentSubModels || 
		 !g_pMaterialSystemHardwareConfig->HasFastVertexTextures() )
		return;

	int nActiveMeshCount = 0;
	mstudiomesh_t *ppMeshes[512];

	// First, build the list of meshes that need morphing
	for ( int i = 0; i < pSubModel->nummeshes; ++i )
	{
		mstudiomesh_t *pMesh = pSubModel->pMesh(i);
		studiomeshdata_t *pMeshData = &m_pStudioMeshes[pMesh->meshid];
		Assert( pMeshData );

		int nFlexCount = pMesh->numflexes;
		if ( !nFlexCount )
			continue;

		for ( int j = 0; j < pMeshData->m_NumGroup; ++j )
		{
			studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];
			bool bIsDeltaFlexed = (pGroup->m_Flags & MESHGROUP_IS_DELTA_FLEXED) != 0;
			if ( !bIsDeltaFlexed )
				continue;

			ppMeshes[nActiveMeshCount++] = pMesh;
			Assert( nActiveMeshCount < 512 );
			break;
		}
	}

	if ( nActiveMeshCount == 0 )
		return;

	// HACK - Just turn off scissor for this model if it is doing morph accumulation
	DisableScissor();

	// Next, accumulate morphs for appropriate meshes
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	pRenderContext->BeginMorphAccumulation();
	for ( int i = 0; i < nActiveMeshCount; ++i )
	{
		mstudiomesh_t *pMesh = ppMeshes[i];
		studiomeshdata_t *pMeshData = &m_pStudioMeshes[pMesh->meshid];

		int nFlexCount = pMesh->numflexes;
		MorphWeight_t *pWeights = (MorphWeight_t*)_alloca( nFlexCount * sizeof(MorphWeight_t) );
		ComputeFlexWeights( nFlexCount, pMesh->pFlex(0), pWeights );

		for ( int j = 0; j < pMeshData->m_NumGroup; ++j )
		{
			studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];
			if ( !pGroup->m_pMorph )
				continue;

			pRenderContext->AccumulateMorph( pGroup->m_pMorph, nFlexCount, pWeights );
		}
	}
	pRenderContext->EndMorphAccumulation();
}


//-----------------------------------------------------------------------------
// Computes eyeball state
//-----------------------------------------------------------------------------
void CStudioRender::ComputeEyelidStateFACS( mstudiomodel_t *pSubModel )
{
	for ( int j = 0; j < pSubModel->numeyeballs; j++ )
	{
		// FIXME: This might not be necessary... 
		R_StudioEyeballPosition( pSubModel->pEyeball( j ), &m_pEyeballState[ j ] );
		R_StudioEyelidFACS( pSubModel->pEyeball(j), &m_pEyeballState[j] );
	}
}


/*
================
R_StudioRenderFinal
inputs:
outputs: returns the number of triangles rendered.
================
*/
int CStudioRender::R_StudioRenderFinal( IMatRenderContext *pRenderContext, 
	int skin, int nBodyPartCount, BodyPartInfo_t *pBodyPartInfo, void /*IClientEntity*/ *pClientEntity,
	IMaterial **ppMaterials, int *pMaterialFlags, int boneMask, int lod, ColorMeshInfo_t *pColorMeshes )
{
	VPROF("CStudioRender::R_StudioRenderFinal");

	int numTrianglesRendered = 0;

	for ( int i=0 ; i < nBodyPartCount; i++ ) 
	{
		m_pSubModel = pBodyPartInfo[i].m_pSubModel;

		// NOTE: This has to run here because it effects flex targets,
		// so therefore it must happen prior to GenerateMorphAccumulator.
		ComputeEyelidStateFACS( m_pSubModel );
		GenerateMorphAccumulator( m_pSubModel );

		// Set up SW flex
		m_VertexCache.SetBodyPart( i );
		m_VertexCache.SetModel( pBodyPartInfo[i].m_nSubModelIndex );

		numTrianglesRendered += R_StudioDrawPoints( pRenderContext, skin, pClientEntity, 
			ppMaterials, pMaterialFlags, boneMask, lod, pColorMeshes );
	}
	return numTrianglesRendered;
}

static ConVar r_flashlightscissor( "r_flashlightscissor", "1", 0 );

void CStudioRender::EnableScissor( FlashlightState_t *state )
{
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );

	// Only scissor into the backbuffer
	if ( r_flashlightscissor.GetBool() && state->DoScissor() && ( pRenderContext->GetRenderTarget() == NULL ) )
	{
		pRenderContext->SetScissorRect( state->GetLeft(), state->GetTop(), state->GetRight(), state->GetBottom(), true );
	}
}

void CStudioRender::DisableScissor()
{
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	// Scissor even if we're not shadow depth mapping
	if ( r_flashlightscissor.GetBool() )
	{
		pRenderContext->SetScissorRect( -1, -1, -1, -1, false );
	}
}


//-----------------------------------------------------------------------------
// Draw shadows
//-----------------------------------------------------------------------------
void CStudioRender::DrawShadows( const DrawModelInfo_t& info, int flags, int boneMask )
{
	if ( !m_ShadowState.Count() )
		return;

	VPROF("CStudioRender::DrawShadows");

	IMaterial* pForcedMat = m_pRC->m_pForcedMaterial;
	OverrideType_t nForcedType = m_pRC->m_nForcedMaterialType;

	// Here, we have to redraw the model one time for each flashlight
	// Having a material of NULL means that we are a light source.
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );

	pRenderContext->SetFlashlightMode( true );
	int i;
	for (i = 0; i < m_ShadowState.Count(); ++i )
	{
		if( !m_ShadowState[i].m_pMaterial )
		{
			Assert( m_ShadowState[i].m_pFlashlightState && m_ShadowState[i].m_pWorldToTexture );
			pRenderContext->SetFlashlightStateEx( *m_ShadowState[i].m_pFlashlightState, *m_ShadowState[i].m_pWorldToTexture, m_ShadowState[i].m_pFlashlightDepthTexture );

			EnableScissor( m_ShadowState[i].m_pFlashlightState );

			R_StudioRenderModel( pRenderContext, info.m_Skin, info.m_Body, info.m_HitboxSet, info.m_pClientEntity,
				info.m_pHardwareData->m_pLODs[info.m_Lod].ppMaterials, 
				info.m_pHardwareData->m_pLODs[info.m_Lod].pMaterialFlags, flags, boneMask, info.m_Lod, info.m_pColorMeshes );

			DisableScissor();
		}
	}
	pRenderContext->SetFlashlightMode( false );

	// Here, we have to redraw the model one time for each shadow
	for (int i = 0; i < m_ShadowState.Count(); ++i )
	{
		if( m_ShadowState[i].m_pMaterial )
		{
			m_pRC->m_pForcedMaterial = m_ShadowState[i].m_pMaterial;
			m_pRC->m_nForcedMaterialType = OVERRIDE_NORMAL;
			R_StudioRenderModel( pRenderContext, 0, info.m_Body, 0, m_ShadowState[i].m_pProxyData,
				NULL, NULL, flags, boneMask, info.m_Lod, NULL );
		}
	}

	// Restore the previous forced material
	m_pRC->m_pForcedMaterial = pForcedMat;
	m_pRC->m_nForcedMaterialType = nForcedType;
}

void CStudioRender::DrawStaticPropShadows( const DrawModelInfo_t &info, const StudioRenderContext_t &rc, const matrix3x4_t& rootToWorld, int flags )
{
	memcpy( &m_StaticPropRootToWorld, &rootToWorld, sizeof(matrix3x4_t) );
	memcpy( &m_PoseToWorld[0], &rootToWorld, sizeof(matrix3x4_t) );

	m_pRC = const_cast< StudioRenderContext_t* >( &rc );
	m_pBoneToWorld = &m_StaticPropRootToWorld;
	m_pStudioHdr = info.m_pStudioHdr;
	m_pStudioMeshes = info.m_pHardwareData->m_pLODs[info.m_Lod].m_pMeshData;
	DrawShadows( info, flags, BONE_USED_BY_ANYTHING );
	m_pRC = NULL;
	m_pBoneToWorld = NULL;
}

// Draw flashlight lighting on decals.
void CStudioRender::DrawFlashlightDecals( const DrawModelInfo_t& info, int lod )
{
	if ( !m_ShadowState.Count() )
		return;

	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	pRenderContext->SetFlashlightMode( true );
	int i;
	for (i = 0; i < m_ShadowState.Count(); ++i )
	{
		// This isn't clear.  This means that this is a flashlight if the material is NULL.  FLASHLIGHTFIXME
		if( !m_ShadowState[i].m_pMaterial )
		{
			Assert( m_ShadowState[i].m_pFlashlightState && m_ShadowState[i].m_pWorldToTexture );
			pRenderContext->SetFlashlightStateEx( *m_ShadowState[i].m_pFlashlightState, *m_ShadowState[i].m_pWorldToTexture, m_ShadowState[i].m_pFlashlightDepthTexture );

			EnableScissor( m_ShadowState[i].m_pFlashlightState );

			DrawDecal( info, lod, info.m_Body );

			DisableScissor();
		}
	}
	pRenderContext->SetFlashlightMode( false );
}


static matrix3x4_t *ComputeSkinMatrix( mstudioboneweight_t &boneweights, matrix3x4_t *pPoseToWorld, matrix3x4_t &result )
{
	float flWeight0, flWeight1, flWeight2;

	switch( boneweights.numbones )
	{
	default:
	case 1:
		return &pPoseToWorld[(unsigned)boneweights.bone[0]];

	case 2:
		{
			matrix3x4_t &boneMat0 = pPoseToWorld[(unsigned)boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[(unsigned)boneweights.bone[1]];
			flWeight0 = boneweights.weight[0];
			flWeight1 = boneweights.weight[1];

			// NOTE: Inlining here seems to make a fair amount of difference
			result[0][0] = boneMat0[0][0] * flWeight0 + boneMat1[0][0] * flWeight1;
			result[0][1] = boneMat0[0][1] * flWeight0 + boneMat1[0][1] * flWeight1;
			result[0][2] = boneMat0[0][2] * flWeight0 + boneMat1[0][2] * flWeight1;
			result[0][3] = boneMat0[0][3] * flWeight0 + boneMat1[0][3] * flWeight1;
			result[1][0] = boneMat0[1][0] * flWeight0 + boneMat1[1][0] * flWeight1;
			result[1][1] = boneMat0[1][1] * flWeight0 + boneMat1[1][1] * flWeight1;
			result[1][2] = boneMat0[1][2] * flWeight0 + boneMat1[1][2] * flWeight1;
			result[1][3] = boneMat0[1][3] * flWeight0 + boneMat1[1][3] * flWeight1;
			result[2][0] = boneMat0[2][0] * flWeight0 + boneMat1[2][0] * flWeight1;
			result[2][1] = boneMat0[2][1] * flWeight0 + boneMat1[2][1] * flWeight1;
			result[2][2] = boneMat0[2][2] * flWeight0 + boneMat1[2][2] * flWeight1;
			result[2][3] = boneMat0[2][3] * flWeight0 + boneMat1[2][3] * flWeight1;
		}
		return &result;

	case 3:
		{
			matrix3x4_t &boneMat0 = pPoseToWorld[(unsigned)boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[(unsigned)boneweights.bone[1]];
			matrix3x4_t &boneMat2 = pPoseToWorld[(unsigned)boneweights.bone[2]];
			flWeight0 = boneweights.weight[0];
			flWeight1 = boneweights.weight[1];
			flWeight2 = boneweights.weight[2];

			result[0][0] = boneMat0[0][0] * flWeight0 + boneMat1[0][0] * flWeight1 + boneMat2[0][0] * flWeight2;
			result[0][1] = boneMat0[0][1] * flWeight0 + boneMat1[0][1] * flWeight1 + boneMat2[0][1] * flWeight2;
			result[0][2] = boneMat0[0][2] * flWeight0 + boneMat1[0][2] * flWeight1 + boneMat2[0][2] * flWeight2;
			result[0][3] = boneMat0[0][3] * flWeight0 + boneMat1[0][3] * flWeight1 + boneMat2[0][3] * flWeight2;
			result[1][0] = boneMat0[1][0] * flWeight0 + boneMat1[1][0] * flWeight1 + boneMat2[1][0] * flWeight2;
			result[1][1] = boneMat0[1][1] * flWeight0 + boneMat1[1][1] * flWeight1 + boneMat2[1][1] * flWeight2;
			result[1][2] = boneMat0[1][2] * flWeight0 + boneMat1[1][2] * flWeight1 + boneMat2[1][2] * flWeight2;
			result[1][3] = boneMat0[1][3] * flWeight0 + boneMat1[1][3] * flWeight1 + boneMat2[1][3] * flWeight2;
			result[2][0] = boneMat0[2][0] * flWeight0 + boneMat1[2][0] * flWeight1 + boneMat2[2][0] * flWeight2;
			result[2][1] = boneMat0[2][1] * flWeight0 + boneMat1[2][1] * flWeight1 + boneMat2[2][1] * flWeight2;
			result[2][2] = boneMat0[2][2] * flWeight0 + boneMat1[2][2] * flWeight1 + boneMat2[2][2] * flWeight2;
			result[2][3] = boneMat0[2][3] * flWeight0 + boneMat1[2][3] * flWeight1 + boneMat2[2][3] * flWeight2;
		}
		return &result;

	case 4:
		Assert(0);
#if (MAX_NUM_BONES_PER_VERT > 3)
		{
			// Don't compile this if MAX_NUM_BONES_PER_VERT is too low
			matrix3x4_t &boneMat0 = pPoseToWorld[boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[boneweights.bone[1]];
			matrix3x4_t &boneMat2 = pPoseToWorld[boneweights.bone[2]];
			matrix3x4_t &boneMat3 = pPoseToWorld[boneweights.bone[3]];
			flWeight0 = boneweights.weight[0];
			flWeight1 = boneweights.weight[1];
			flWeight2 = boneweights.weight[2];
			float flWeight3 = boneweights.weight[3];

			result[0][0] = boneMat0[0][0] * flWeight0 + boneMat1[0][0] * flWeight1 + boneMat2[0][0] * flWeight2 + boneMat3[0][0] * flWeight3;
			result[0][1] = boneMat0[0][1] * flWeight0 + boneMat1[0][1] * flWeight1 + boneMat2[0][1] * flWeight2 + boneMat3[0][1] * flWeight3;
			result[0][2] = boneMat0[0][2] * flWeight0 + boneMat1[0][2] * flWeight1 + boneMat2[0][2] * flWeight2 + boneMat3[0][2] * flWeight3;
			result[0][3] = boneMat0[0][3] * flWeight0 + boneMat1[0][3] * flWeight1 + boneMat2[0][3] * flWeight2 + boneMat3[0][3] * flWeight3;
			result[1][0] = boneMat0[1][0] * flWeight0 + boneMat1[1][0] * flWeight1 + boneMat2[1][0] * flWeight2 + boneMat3[1][0] * flWeight3;
			result[1][1] = boneMat0[1][1] * flWeight0 + boneMat1[1][1] * flWeight1 + boneMat2[1][1] * flWeight2 + boneMat3[1][1] * flWeight3;
			result[1][2] = boneMat0[1][2] * flWeight0 + boneMat1[1][2] * flWeight1 + boneMat2[1][2] * flWeight2 + boneMat3[1][2] * flWeight3;
			result[1][3] = boneMat0[1][3] * flWeight0 + boneMat1[1][3] * flWeight1 + boneMat2[1][3] * flWeight2 + boneMat3[1][3] * flWeight3;
			result[2][0] = boneMat0[2][0] * flWeight0 + boneMat1[2][0] * flWeight1 + boneMat2[2][0] * flWeight2 + boneMat3[2][0] * flWeight3;
			result[2][1] = boneMat0[2][1] * flWeight0 + boneMat1[2][1] * flWeight1 + boneMat2[2][1] * flWeight2 + boneMat3[2][1] * flWeight3;
			result[2][2] = boneMat0[2][2] * flWeight0 + boneMat1[2][2] * flWeight1 + boneMat2[2][2] * flWeight2 + boneMat3[2][2] * flWeight3;
			result[2][3] = boneMat0[2][3] * flWeight0 + boneMat1[2][3] * flWeight1 + boneMat2[2][3] * flWeight2 + boneMat3[2][3] * flWeight3;
		}
		return &result;
#endif
	}

	Assert(0);
	return NULL;
}


static matrix3x4_t *ComputeSkinMatrixSSE( mstudioboneweight_t &boneweights, matrix3x4_t *pPoseToWorld, matrix3x4_t &result )
{
	// NOTE: pPoseToWorld, being cache aligned, doesn't need explicit initialization
#if defined( _WIN32 ) && !defined( _X360 )
	switch( boneweights.numbones )
	{
	default:
	case 1:
		return &pPoseToWorld[boneweights.bone[0]];

	case 2:
		{
			matrix3x4_t &boneMat0 = pPoseToWorld[boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[boneweights.bone[1]];
			float *pWeights = boneweights.weight;

			_asm
			{
				mov		eax, DWORD PTR [pWeights]
				movss	xmm6, dword ptr[eax]		; boneweights.weight[0]
				movss	xmm7, dword ptr[eax + 4]	; boneweights.weight[1]

				mov		eax, DWORD PTR [boneMat0]
				mov		ecx, DWORD PTR [boneMat1]
				mov		edi, DWORD PTR [result]

				// Fill xmm6, and 7 with all the bone weights
				shufps	xmm6, xmm6, 0
				shufps	xmm7, xmm7, 0

				// Load up all rows of the three matrices
				movaps	xmm0, XMMWORD PTR [eax]
				movaps	xmm1, XMMWORD PTR [ecx]
				movaps	xmm2, XMMWORD PTR [eax + 16]
				movaps	xmm3, XMMWORD PTR [ecx + 16]
				movaps	xmm4, XMMWORD PTR [eax + 32]
				movaps	xmm5, XMMWORD PTR [ecx + 32]

				// Multiply the rows by the weights
				mulps	xmm0, xmm6
				mulps	xmm1, xmm7
				mulps	xmm2, xmm6
				mulps	xmm3, xmm7
				mulps	xmm4, xmm6
				mulps	xmm5, xmm7

				addps	xmm0, xmm1
				addps	xmm2, xmm3
				addps	xmm4, xmm5

				movaps	XMMWORD PTR [edi], xmm0
				movaps	XMMWORD PTR [edi + 16], xmm2
				movaps	XMMWORD PTR [edi + 32], xmm4
			}
		}
		return &result;

	case 3:
		{
			matrix3x4_t &boneMat0 = pPoseToWorld[boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[boneweights.bone[1]];
			matrix3x4_t &boneMat2 = pPoseToWorld[boneweights.bone[2]];
			float *pWeights = boneweights.weight;

			_asm
			{
				mov		eax, DWORD PTR [pWeights]
				movss	xmm5, dword ptr[eax]		; boneweights.weight[0]
				movss	xmm6, dword ptr[eax + 4]	; boneweights.weight[1]
				movss	xmm7, dword ptr[eax + 8]	; boneweights.weight[2]

				mov		eax, DWORD PTR [boneMat0]
				mov		ecx, DWORD PTR [boneMat1]
				mov		edx, DWORD PTR [boneMat2]
				mov		edi, DWORD PTR [result]

				// Fill xmm5, 6, and 7 with all the bone weights
				shufps	xmm5, xmm5, 0
				shufps	xmm6, xmm6, 0
				shufps	xmm7, xmm7, 0

				// Load up the first row of the three matrices
				movaps	xmm0, XMMWORD PTR [eax]
				movaps	xmm1, XMMWORD PTR [ecx]
				movaps	xmm2, XMMWORD PTR [edx]

				// Multiply the rows by the weights
				mulps	xmm0, xmm5
				mulps	xmm1, xmm6
				mulps	xmm2, xmm7

				addps	xmm0, xmm1
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi], xmm0
				
				// Load up the second row of the three matrices
				movaps	xmm0, XMMWORD PTR [eax + 16]
				movaps	xmm1, XMMWORD PTR [ecx + 16]
				movaps	xmm2, XMMWORD PTR [edx + 16]

				// Multiply the rows by the weights
				mulps	xmm0, xmm5
				mulps	xmm1, xmm6
				mulps	xmm2, xmm7

				addps	xmm0, xmm1
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi + 16], xmm0	

				// Load up the third row of the three matrices
				movaps	xmm0, XMMWORD PTR [eax + 32]
				movaps	xmm1, XMMWORD PTR [ecx + 32]
				movaps	xmm2, XMMWORD PTR [edx + 32]

				// Multiply the rows by the weights
				mulps	xmm0, xmm5
				mulps	xmm1, xmm6
				mulps	xmm2, xmm7

				addps	xmm0, xmm1
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi + 32], xmm0	
			}
		}
		return &result;

	case 4:
		Assert(0);
#if (MAX_NUM_BONES_PER_VERT > 3)
		{
			// Don't compile this if MAX_NUM_BONES_PER_VERT is too low
			matrix3x4_t &boneMat0 = pPoseToWorld[boneweights.bone[0]];
			matrix3x4_t &boneMat1 = pPoseToWorld[boneweights.bone[1]];
			matrix3x4_t &boneMat2 = pPoseToWorld[boneweights.bone[2]];
			matrix3x4_t &boneMat3 = pPoseToWorld[boneweights.bone[3]];
			float *pWeights = boneweights.weight;

			_asm
			{
				mov		eax, DWORD PTR [pWeights]
				movss	xmm4, dword ptr[eax]		; boneweights.weight[0]
				movss	xmm5, dword ptr[eax + 4]	; boneweights.weight[1]
				movss	xmm6, dword ptr[eax + 8]	; boneweights.weight[2]
				movss	xmm7, dword ptr[eax + 12]	; boneweights.weight[3]

				mov		eax, DWORD PTR [boneMat0]
				mov		ecx, DWORD PTR [boneMat1]
				mov		edx, DWORD PTR [boneMat2]
				mov		esi, DWORD PTR [boneMat3]
				mov		edi, DWORD PTR [result]

				// Fill xmm5, 6, and 7 with all the bone weights
				shufps	xmm4, xmm4, 0
				shufps	xmm5, xmm5, 0
				shufps	xmm6, xmm6, 0
				shufps	xmm7, xmm7, 0

				// Load up the first row of the four matrices
				movaps	xmm0, XMMWORD PTR [eax]
				movaps	xmm1, XMMWORD PTR [ecx]
				movaps	xmm2, XMMWORD PTR [edx]
				movaps	xmm3, XMMWORD PTR [esi]

				// Multiply the rows by the weights
				mulps	xmm0, xmm4
				mulps	xmm1, xmm5
				mulps	xmm2, xmm6
				mulps	xmm3, xmm7

				addps	xmm0, xmm1
				addps	xmm2, xmm3
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi], xmm0
				
				// Load up the second row of the three matrices
				movaps	xmm0, XMMWORD PTR [eax + 16]
				movaps	xmm1, XMMWORD PTR [ecx + 16]
				movaps	xmm2, XMMWORD PTR [edx + 16]
				movaps	xmm3, XMMWORD PTR [esi + 16]

				// Multiply the rows by the weights
				mulps	xmm0, xmm4
				mulps	xmm1, xmm5
				mulps	xmm2, xmm6
				mulps	xmm3, xmm7

				addps	xmm0, xmm1
				addps	xmm2, xmm3
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi + 16], xmm0	

				// Load up the third row of the three matrices
				movaps	xmm0, XMMWORD PTR [eax + 32]
				movaps	xmm1, XMMWORD PTR [ecx + 32]
				movaps	xmm2, XMMWORD PTR [edx + 32]
				movaps	xmm3, XMMWORD PTR [esi + 32]

				// Multiply the rows by the weights
				mulps	xmm0, xmm4
				mulps	xmm1, xmm5
				mulps	xmm2, xmm6
				mulps	xmm3, xmm7

				addps	xmm0, xmm1
				addps	xmm2, xmm3
				addps	xmm0, xmm2
				movaps	XMMWORD PTR [edi + 32], xmm0	
			}
		}
		return &result;
#endif
	}
#elif POSIX
#warning "ComputeSkinMatrixSSE C implementation only"
	return ComputeSkinMatrix( boneweights, pPoseToWorld, result );
#elif defined( _X360 )
	return ComputeSkinMatrix( boneweights, pPoseToWorld, result );
#else
	#error
#endif

	Assert( 0 );
	return NULL;
}

//-----------------------------------------------------------------------------
// Designed for inter-module draw optimized calling, requires R_InitLightEffectWorld3()
// Compute the lighting at a point and normal
// Uses the set function pointer
// Final lighting is in gamma space
//-----------------------------------------------------------------------------
static lightpos_t lightpos[MAXLOCALLIGHTS];
inline void CStudioRender::R_ComputeLightAtPoint3( const Vector &pos, const Vector &normal, Vector &color )
{
	if ( m_pRC->m_Config.fullbright )
	{
		color.Init( 1.0f, 1.0f, 1.0f );
		return;
	}

	// Set up lightpos[i].dot, lightpos[i].falloff, and lightpos[i].delta for all lights
	R_LightStrengthWorld( pos, m_pRC->m_NumLocalLights, m_pRC->m_LocalLights, lightpos );

	// calculate ambient values from the ambient cube given a normal.
	R_LightAmbient_4D( normal, m_pRC->m_LightBoxColors, color );

	// Calculate color given lightpos_t lightpos, a normal, and the ambient
	// color from the ambient cube calculated above.
	Assert(R_LightEffectsWorld3);
	R_LightEffectsWorld3( m_pRC->m_LocalLights, lightpos, normal, color );
}


// define SPECIAL_SSE_MESH_PROCESSOR to enable code which contains a special optimized SSE lighting loop, significantly
// improving software vertex processing performace.
#if defined( _WIN32 ) && !defined( _X360 )
#define SPECIAL_SSE_MESH_PROCESSOR
#endif

#ifdef SPECIAL_SSE_MESH_PROCESSOR
//#define VERIFY_SSE_LIGHTING

// false: MAX(0,L*N) true: .5*(L.N)+.5. set based on material
static bool SSELightingHalfLambert;							

// These variables are used by the special SSE lighting path. The
// lighting path calculates them everytime it processes a mesh so their
// is no need to keep them in sync with changes to the other light variables
static fltx4 OneOver_ThetaDot_Minus_PhiDot[MAXLOCALLIGHTS]; // 1/(theta-phi)

void CStudioRender::R_MouthLighting( fltx4 fIllum, const FourVectors& normal, const FourVectors& forward, FourVectors &light )
{
	fltx4 dot = SubSIMD(Four_Zeros,normal*forward);
	dot=MaxSIMD(Four_Zeros,dot);
	dot=MulSIMD(fIllum,dot);
	light *= dot;
}

inline void CStudioRender::R_ComputeLightAtPoints3( const FourVectors &pos, const FourVectors &normal, FourVectors &color )
{
	if ( m_pRC->m_Config.fullbright )
	{
		color.DuplicateVector( Vector( 1.0f, 1.0f, 1.0f ) );
		return;
	}

	R_LightAmbient_4D( normal, m_pRC->m_LightBoxColors, color );
	// now, add in contribution from all lights
	for ( int i = 0; i < m_pRC->m_NumLocalLights; i++)
	{
		FourVectors delta;
		LightDesc_t const *wl = m_pRC->m_LocalLights+i;
		Assert((wl->m_Type==MATERIAL_LIGHT_POINT) || (wl->m_Type==MATERIAL_LIGHT_SPOT) || (wl->m_Type==MATERIAL_LIGHT_DIRECTIONAL));
		switch (wl->m_Type)
		{
			case MATERIAL_LIGHT_POINT:
			case MATERIAL_LIGHT_SPOT:
				delta.DuplicateVector(wl->m_Position);
				delta-=pos;
				break;
				
			case MATERIAL_LIGHT_DIRECTIONAL:
				delta.DuplicateVector(wl->m_Direction);
				delta*=-1.0;
				break;
				
		}
		fltx4 falloff = R_WorldLightDistanceFalloff( wl, delta);
		delta.VectorNormalizeFast();
		fltx4 strength=delta*normal;
		if (SSELightingHalfLambert)
		{
			strength=AddSIMD(MulSIMD(strength,Four_PointFives),Four_PointFives);
		}
		else
			strength=MaxSIMD(Four_Zeros,delta*normal);
		
		switch(wl->m_Type)
		{
			case MATERIAL_LIGHT_POINT:
				// half-lambert
				break;
				
 			case MATERIAL_LIGHT_SPOT:
			{
				fltx4 dot2=SubSIMD(Four_Zeros,delta*wl->m_Direction); // dot position with spot light dir for cone falloff

				fltx4 cone_falloff_scale=MulSIMD(OneOver_ThetaDot_Minus_PhiDot[i],
													 SubSIMD(dot2,ReplicateX4(wl->m_PhiDot)));
				cone_falloff_scale=MinSIMD(cone_falloff_scale,Four_Ones);
				if ((wl->m_Falloff!=0.0) && (wl->m_Falloff!=1.0))
				{
					// !!speed!! could compute integer exponent needed by powsimd and store in light
					cone_falloff_scale=PowSIMD(cone_falloff_scale,wl->m_Falloff);
				}
				strength=MulSIMD(cone_falloff_scale,strength);

				// now, zero out lighting where dot2<phidot. This will mask out any invalid results
				// from pow function, etc
 				fltx4 OutsideMask=CmpGtSIMD(dot2,ReplicateX4(wl->m_PhiDot)); // outside light cone?
 				strength=AndSIMD(OutsideMask,strength);
			}
			break;
			
			case MATERIAL_LIGHT_DIRECTIONAL:
				break;

		}
		strength=MulSIMD(strength,falloff);
		color.x=AddSIMD(color.x,MulSIMD(strength,ReplicateX4(wl->m_Color.x)));
		color.y=AddSIMD(color.y,MulSIMD(strength,ReplicateX4(wl->m_Color.y)));
		color.z=AddSIMD(color.z,MulSIMD(strength,ReplicateX4(wl->m_Color.z)));
	}
}

#endif // SPECIAL_SSE_MESH_PROCESSOR

//-----------------------------------------------------------------------------
// Optimized for low-end hardware
//-----------------------------------------------------------------------------
#pragma warning (disable:4701)

// NOTE: I'm using this crazy wrapper because using straight template functions
// doesn't appear to work with function tables 
template< int nHasTangentSpace, int nDoFlex, int nHasSIMD, int nLighting, int nDX8VertexFormat > 
class CProcessMeshWrapper
{
public:
	static void R_PerformLighting( const Vector &forward, float fIllum, 
		const Vector &pos, const Vector &norm, unsigned int nAlphaMask, unsigned int *pColor )
	{
		if ( nLighting == LIGHTING_SOFTWARE )
		{
			Vector color;
			g_StudioRender.R_ComputeLightAtPoint3( pos, norm, color );

			unsigned char r = LinearToLightmap( color.x );
			unsigned char g = LinearToLightmap( color.y );
			unsigned char b = LinearToLightmap( color.z );

			*pColor = b | (g << 8) | (r << 16) | nAlphaMask;
		}
		else if ( nLighting == LIGHTING_MOUTH )
		{
			if ( fIllum != 0.0f )
			{
				Vector color;
				g_StudioRender.R_ComputeLightAtPoint3( pos, norm, color );
				g_StudioRender.R_MouthLighting( fIllum, norm, forward, color );

				unsigned char r = LinearToLightmap( color.x );
				unsigned char g = LinearToLightmap( color.y );
				unsigned char b = LinearToLightmap( color.z );

				*pColor = b | (g << 8) | (r << 16) | nAlphaMask;
			}
			else
			{
				*pColor = nAlphaMask;
			}
		}
	}

	static void R_TransformVert( const Vector *pSrcPos, const Vector *pSrcNorm, const Vector4D *pSrcTangentS,
		matrix3x4_t *pSkinMat, VectorAligned &pos, Vector &norm, Vector4DAligned &tangentS )
	{
		// NOTE: Could add SSE stuff here, if we knew what SSE stuff could make it faster

		pos.x  = pSrcPos->x  * (*pSkinMat)[0][0] + pSrcPos->y  * (*pSkinMat)[0][1] + pSrcPos->z  * (*pSkinMat)[0][2] + (*pSkinMat)[0][3];
		norm.x = pSrcNorm->x * (*pSkinMat)[0][0] + pSrcNorm->y * (*pSkinMat)[0][1] + pSrcNorm->z * (*pSkinMat)[0][2];

		pos.y  = pSrcPos->x  * (*pSkinMat)[1][0] + pSrcPos->y  * (*pSkinMat)[1][1] + pSrcPos->z  * (*pSkinMat)[1][2] + (*pSkinMat)[1][3];
		norm.y = pSrcNorm->x * (*pSkinMat)[1][0] + pSrcNorm->y * (*pSkinMat)[1][1] + pSrcNorm->z * (*pSkinMat)[1][2];

		pos.z  = pSrcPos->x  * (*pSkinMat)[2][0] + pSrcPos->y  * (*pSkinMat)[2][1] + pSrcPos->z  * (*pSkinMat)[2][2] + (*pSkinMat)[2][3];
		norm.z = pSrcNorm->x * (*pSkinMat)[2][0] + pSrcNorm->y * (*pSkinMat)[2][1] + pSrcNorm->z * (*pSkinMat)[2][2];

		if ( nHasTangentSpace )
		{
			tangentS.x = pSrcTangentS->x * (*pSkinMat)[0][0] + pSrcTangentS->y * (*pSkinMat)[0][1]	+ pSrcTangentS->z * (*pSkinMat)[0][2];
			tangentS.y = pSrcTangentS->x * (*pSkinMat)[1][0] + pSrcTangentS->y * (*pSkinMat)[1][1]	+ pSrcTangentS->z * (*pSkinMat)[1][2];
			tangentS.z = pSrcTangentS->x * (*pSkinMat)[2][0] + pSrcTangentS->y * (*pSkinMat)[2][1]	+ pSrcTangentS->z * (*pSkinMat)[2][2];
			tangentS.w = pSrcTangentS->w;
		}
	}

	static void R_StudioSoftwareProcessMesh( const mstudio_meshvertexdata_t *vertData, matrix3x4_t *pPoseToWorld,
		CCachedRenderData &vertexCache, CMeshBuilder& meshBuilder, int numVertices, unsigned short* pGroupToMesh, unsigned int nAlphaMask,
											 IMaterial* pMaterial)		
	{
		Vector color;
		Vector4D *pStudioTangentS;
		Vector4DAligned tangentS;
		Vector *pSrcPos;
		Vector *pSrcNorm;
		Vector4D *pSrcTangentS = NULL;

		ALIGN16 ModelVertexDX8_t dstVertex ALIGN16_POST;
		dstVertex.m_flBoneWeights[0] = 1.0f;
		dstVertex.m_flBoneWeights[1] = 0.0f;
		dstVertex.m_nBoneIndices = 0;
		dstVertex.m_nColor = 0xFFFFFFFF;
		dstVertex.m_vecUserData.Init( 1.0f, 0.0f, 0.0f, 1.0f );

		ALIGN16 matrix3x4_t temp ALIGN16_POST;
		ALIGN16 matrix3x4_t *pSkinMat ALIGN16_POST;

		int ntemp[PREFETCH_VERT_COUNT];

		Assert( numVertices > 0 );

		mstudiovertex_t *pVertices = vertData->Vertex( 0 );

		if (nHasTangentSpace)
		{
			pStudioTangentS = vertData->TangentS( 0 );
			Assert( pStudioTangentS->w == -1.0f || pStudioTangentS->w == 1.0f );
		}

		// Mouth related stuff...
		float fIllum = 1.0f;
		Vector forward;
		if (nLighting == LIGHTING_MOUTH)
		{
			g_StudioRender.R_MouthComputeLightingValues( fIllum, forward );
		}

		if ((nLighting == LIGHTING_MOUTH) || (nLighting == LIGHTING_SOFTWARE))
		{
			g_StudioRender.R_InitLightEffectsWorld3();
		}
#ifdef _DEBUG
		// In debug, clear it out to ensure we aren't accidentially calling 
		// the last setup for R_ComputeLightForPoint3.
		else
		{
			g_StudioRender.R_LightEffectsWorld3 = NULL;
		}
#endif

#if defined( _WIN32 ) && !defined( _X360 )
		if ( nHasSIMD )
		{
			// Precaches the data
			_mm_prefetch( (char*)((int)pGroupToMesh & (~0x1F)), _MM_HINT_NTA );
		}
#endif
		for ( int i = 0; i < PREFETCH_VERT_COUNT; ++i )
		{
			ntemp[i] = pGroupToMesh[i];
#if defined( _WIN32 ) && !defined( _X360 )
			if ( nHasSIMD )
			{
				char *pMem = (char*)&pVertices[ntemp[i]];
				_mm_prefetch( pMem, _MM_HINT_NTA );
				_mm_prefetch( pMem + 32, _MM_HINT_NTA );
				if ( nHasTangentSpace )
				{
					_mm_prefetch( (char*)&pStudioTangentS[ntemp[i]], _MM_HINT_NTA );
				}
			}
#endif
		}

		int n, idx;
		for ( int j=0; j < numVertices; ++j )
		{
#if defined( _WIN32 ) && !defined( _X360 )
			if ( nHasSIMD )
			{
				char *pMem = (char*)&pGroupToMesh[j + PREFETCH_VERT_COUNT + 1];
				_mm_prefetch( (char*)((int)pMem & (~0x1F)), _MM_HINT_NTA );
			}
#endif
			idx = j & (PREFETCH_VERT_COUNT-1);
			n = ntemp[idx];

			mstudiovertex_t &vert = pVertices[n];

			ntemp[idx] = pGroupToMesh[j + PREFETCH_VERT_COUNT];

			// Compute the skinning matrix
			if ( nHasSIMD )
			{
				pSkinMat = ComputeSkinMatrixSSE( vert.m_BoneWeights, pPoseToWorld, temp );
			}
			else
			{
				pSkinMat = ComputeSkinMatrix( vert.m_BoneWeights, pPoseToWorld, temp );
			}

			// transform into world space
			if (nDoFlex && vertexCache.IsVertexFlexed(n))
			{
				CachedPosNormTan_t* pFlexedVertex = vertexCache.GetFlexVertex(n);
				pSrcPos = &pFlexedVertex->m_Position;
				pSrcNorm = &pFlexedVertex->m_Normal;

				if (nHasTangentSpace)
				{
					pSrcTangentS = &pFlexedVertex->m_TangentS;
					Assert( pSrcTangentS->w == -1.0f || pSrcTangentS->w == 1.0f );
				}
			}
			else
			{
				pSrcPos = &vert.m_vecPosition;
				pSrcNorm = &vert.m_vecNormal;

				if (nHasTangentSpace)
				{
					pSrcTangentS = &pStudioTangentS[n];
					Assert( pSrcTangentS->w == -1.0f || pSrcTangentS->w == 1.0f );
				}
			}

			// Transform the vert into world space
			R_TransformVert( pSrcPos, pSrcNorm, pSrcTangentS, pSkinMat, 
				*(VectorAligned*)&dstVertex.m_vecPosition, dstVertex.m_vecNormal, *(Vector4DAligned*)&dstVertex.m_vecUserData );

#if defined( _WIN32 ) && !defined( _X360 )
			if ( nHasSIMD )
			{
				_mm_prefetch( (char*)&pVertices[ntemp[idx]], _MM_HINT_NTA);
				_mm_prefetch( (char*)&pVertices[ntemp[idx]] + 32, _MM_HINT_NTA );
				if ( nHasTangentSpace )
				{
					_mm_prefetch( (char*)&pStudioTangentS[ntemp[idx]], _MM_HINT_NTA );
				}
			}
#endif
			// Compute lighting
			R_PerformLighting( forward, fIllum, dstVertex.m_vecPosition, dstVertex.m_vecNormal, nAlphaMask, &dstVertex.m_nColor );

			dstVertex.m_vecTexCoord = vert.m_vecTexCoord; 

			if ( IsX360() || nDX8VertexFormat )
			{
#if !defined( _X360 )
				Assert( dstVertex.m_vecUserData.w == -1.0f || dstVertex.m_vecUserData.w == 1.0f );
				if ( nHasSIMD )
				{
					meshBuilder.FastVertexSSE( dstVertex );
				}
				else
				{
					meshBuilder.FastVertex( dstVertex );
				}
#else
				meshBuilder.VertexDX8ToX360( dstVertex );
#endif
			}
			else
			{
				if ( nHasSIMD )
				{
					meshBuilder.FastVertexSSE( *(ModelVertexDX7_t*)&dstVertex );
				}
				else
				{
					meshBuilder.FastVertex( *(ModelVertexDX7_t*)&dstVertex );
				}
			}
		}
		meshBuilder.FastAdvanceNVertices( numVertices );
	}

#ifdef SPECIAL_SSE_MESH_PROCESSOR

#ifdef VERIFY_SSE_LIGHTING
	static int NotCloseEnough( float a, float b )
	{
		// check if 2 linear lighting values are close enough between the sse and non see lighting model
		// no point being more precise than 1% since it all maps to 8 bit anyway
		float thresh=0.1f*fabs( a );
		if ( thresh < 0.1f )
			thresh = 0.1f;
		return ( fabs( a-b ) > thresh );
	}
#endif

	// this special version of the vertex processor does 4 vertices at once, so that they can be lit using SSE instructions. This provides
	// a >2x speedup in the lit case
	static void R_PerformVectorizedLightingSSE( const FourVectors &forward, fltx4 fIllum, ModelVertexDX8_t *dst, unsigned int nAlphaMask)
	{
		if ( nLighting == LIGHTING_SOFTWARE )
		{
#ifdef VERIFY_SSE_LIGHTING
// 			if ( (g_StudioRender.m_NumLocalLights==1) &&
// 				 ( (g_StudioRender.m_LocalLights[0].m_Type==MATERIAL_LIGHT_SPOT)))
// 			{
// 				// ihvtest doesn't use different exponents for its spots,
// 				// so i mess with the exponents when testing
// 				static int ctr=0;
// 				static float exps[8]={0,1,2,3,4,4.5,5.25,2.5};
// 				ctr=(ctr+1)&7;
// 				g_StudioRender.m_LocalLights[0].m_Falloff=exps[ctr];
// 			}
#endif
			FourVectors Position;
			Position.LoadAndSwizzleAligned(dst[0].m_vecPosition,dst[1].m_vecPosition,dst[2].m_vecPosition,dst[3].m_vecPosition);
			FourVectors Normal(dst[0].m_vecNormal,dst[1].m_vecNormal,dst[2].m_vecNormal,dst[3].m_vecNormal);
			FourVectors Color;
			g_StudioRender.R_ComputeLightAtPoints3( Position, Normal, Color);

			for (int i=0; i<4; i++)
			{
				Vector color;
#ifdef VERIFY_SSE_LIGHTING
				// debug - check sse version against "real" version
				g_StudioRender.R_ComputeLightAtPoint3( dst[i].m_vecPosition,dst[i].m_vecNormal, color );
				if ( NotCloseEnough(color.x,Color.X(i)) ||
					 NotCloseEnough(color.y,Color.Y(i)) ||
					 NotCloseEnough(color.z,Color.Z(i)))
				{
					Assert(0);
					// recompute so can step in debugger
					g_StudioRender.R_ComputeLightAtPoints3( Position,Normal,Color);
					g_StudioRender.R_ComputeLightAtPoint3( dst[i].m_vecPosition,dst[i].m_vecNormal, color );
				}
#endif
				unsigned char r = LinearToLightmap( Color.X(i) );
				unsigned char g = LinearToLightmap( Color.Y(i) );
				unsigned char b = LinearToLightmap( Color.Z(i) );
				
				dst[i].m_nColor = b | (g << 8) | (r << 16) | nAlphaMask;
			}
		}
		else if ( nLighting == LIGHTING_MOUTH )
		{
			FourVectors Position;
			Position.LoadAndSwizzleAligned(dst[0].m_vecPosition,dst[1].m_vecPosition,dst[2].m_vecPosition,dst[3].m_vecPosition);
			FourVectors Normal(dst[0].m_vecNormal,dst[1].m_vecNormal,dst[2].m_vecNormal,dst[3].m_vecNormal);
			FourVectors Color;

			g_StudioRender.R_ComputeLightAtPoints3( Position, Normal, Color);
			g_StudioRender.R_MouthLighting( fIllum, Normal, forward, Color );
			for (int i=0; i<4; i++)
			{
				unsigned char r = LinearToLightmap( Color.X(i) );
				unsigned char g = LinearToLightmap( Color.Y(i) );
				unsigned char b = LinearToLightmap( Color.Z(i) );
				
				dst[i].m_nColor = b | (g << 8) | (r << 16) | nAlphaMask;
			}
		}
	}

	static void R_StudioSoftwareProcessMeshSSE_DX7( const mstudio_meshvertexdata_t *vertData, matrix3x4_t *pPoseToWorld,
													CCachedRenderData &vertexCache, CMeshBuilder& meshBuilder, 
													int numVertices, unsigned short* pGroupToMesh, unsigned int nAlphaMask,
													IMaterial* pMaterial)
	{
		Assert( numVertices > 0 );
		mstudiovertex_t *pVertices = vertData->Vertex( 0 );

#define N_VERTS_TO_DO_AT_ONCE 4								// for SSE processing
		Assert(N_VERTS_TO_DO_AT_ONCE<=PREFETCH_VERT_COUNT);

		SSELightingHalfLambert=(pMaterial && (pMaterial->GetMaterialVarFlag( MATERIAL_VAR_HALFLAMBERT)));
		Vector color;
		Vector *pSrcPos;
		Vector *pSrcNorm;
		
		ALIGN16 ModelVertexDX8_t dstVertexBuf[N_VERTS_TO_DO_AT_ONCE] ALIGN16_POST;
		for(int i=0;i<N_VERTS_TO_DO_AT_ONCE;i++)
		{
			dstVertexBuf[i].m_flBoneWeights[0] = 1.0f;
			dstVertexBuf[i].m_flBoneWeights[1] = 0.0f;
			dstVertexBuf[i].m_nBoneIndices = 0;
			dstVertexBuf[i].m_nColor = 0xFFFFFFFF;
			dstVertexBuf[i].m_vecUserData.Init( 1.0f, 0.0f, 0.0f, 1.0f );
		}

		// do per-light precalcs. Better than doing them per vertex
		for ( int l = 0; l < g_StudioRender.m_pRC->m_NumLocalLights; l++)
		{
			LightDesc_t *wl=g_StudioRender.m_pRC->m_LocalLights+l;
			if (wl->m_Type==MATERIAL_LIGHT_SPOT)
			{
				float spread=wl->m_ThetaDot-wl->m_PhiDot;
				if (spread>1.0e-10)
				{
					// note - this quantity is very sensitive to round off error. the sse
					// reciprocal approximation won't cut it here.
					OneOver_ThetaDot_Minus_PhiDot[l]=ReplicateX4(1.0/spread);
				}
				else
				{
					// hard falloff instead of divide by zero
					OneOver_ThetaDot_Minus_PhiDot[l]=ReplicateX4(1.0);
				}					
			}
		}

		ALIGN16 matrix3x4_t temp ALIGN16_POST;
		ALIGN16 matrix3x4_t *pSkinMat ALIGN16_POST;

		// Mouth related stuff...
		float fIllum = 1.0f;
		fltx4 fIllumReplicated;

		Vector forward;
		FourVectors mouth_forward;
		if (nLighting == LIGHTING_MOUTH)
		{
			g_StudioRender.R_MouthComputeLightingValues( fIllum, forward );
			mouth_forward.DuplicateVector(forward);
		}
		fIllumReplicated=ReplicateX4(fIllum);

		if ((nLighting == LIGHTING_MOUTH) || (nLighting == LIGHTING_SOFTWARE))
		{
			g_StudioRender.R_InitLightEffectsWorld3();
		}
#ifdef _DEBUG
		// In debug, clear it out to ensure we aren't accidentially calling 
		// the last setup for R_ComputeLightForPoint3.
		else
		{
			g_StudioRender.R_LightEffectsWorld3 = NULL;
		}
#endif

		int n_iters=numVertices;
		
		ModelVertexDX8_t *dst=dstVertexBuf;
		while(1)
		{
			for(int subc=0;subc<4;subc++)
			{
				int n=*(pGroupToMesh++);
				
				mstudiovertex_t &vert = pVertices[n];
				
				// Compute the skinning matrix
				pSkinMat = ComputeSkinMatrixSSE( vert.m_BoneWeights, pPoseToWorld, temp );
			
				// transform into world space
				if (nDoFlex && vertexCache.IsVertexFlexed(n))
				{
					CachedPosNormTan_t* pFlexedVertex = vertexCache.GetFlexVertex(n);
					pSrcPos = &pFlexedVertex->m_Position;
					pSrcNorm = &pFlexedVertex->m_Normal;
				}
				else
				{
					pSrcPos = &vert.m_vecPosition;
					pSrcNorm = &vert.m_vecNormal;
					
				}
				
				// Transform the vert into world space
				R_TransformVert( pSrcPos, pSrcNorm, 0, pSkinMat, 
								 *(VectorAligned*)&dst->m_vecPosition, dst->m_vecNormal, *(Vector4DAligned*)&dst->m_vecUserData );
				
				dst->m_vecTexCoord = vert.m_vecTexCoord; 
				dst++;
			}
			n_iters-=4;
			dst=dstVertexBuf;
			// Compute lighting
			R_PerformVectorizedLightingSSE( mouth_forward, fIllumReplicated, dst, nAlphaMask);
			if (n_iters<=0)									// partial copy back?
			{
				// copy 1..3 verts
				while(n_iters!=-4)
				{
					meshBuilder.FastVertexSSE( *(ModelVertexDX7_t*)dst );
					n_iters--;
					dst++;
				}
				break;
			}
			else
			{
				meshBuilder.Fast4VerticesSSE( 
					(ModelVertexDX7_t*)&(dst[0]),
					(ModelVertexDX7_t*)&(dst[1]),
					(ModelVertexDX7_t*)&(dst[2]),
					(ModelVertexDX7_t*)&(dst[3]));
			}
		}
		meshBuilder.FastAdvanceNVertices( numVertices );
	}
#endif // SPECIAL_SSE_MESH_PROCESSOR
};

//-----------------------------------------------------------------------------
// Draws the mesh as tristrips using software
//-----------------------------------------------------------------------------
#if !defined( _X360 )
typedef CProcessMeshWrapper< false, false, false, LIGHTING_HARDWARE, false >	ProcessMesh000H7_t;
typedef CProcessMeshWrapper< false, false, false, LIGHTING_SOFTWARE, false >	ProcessMesh000S7_t;
typedef CProcessMeshWrapper< false, false, false, LIGHTING_MOUTH, false >		ProcessMesh000M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< false, false, true, LIGHTING_HARDWARE, false >		ProcessMesh001H7_t;
typedef CProcessMeshWrapper< false, false, true, LIGHTING_SOFTWARE, false >		ProcessMesh001S7_t;
typedef CProcessMeshWrapper< false, false, true, LIGHTING_MOUTH, false >		ProcessMesh001M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< false, true, false, LIGHTING_HARDWARE, false >		ProcessMesh010H7_t;
typedef CProcessMeshWrapper< false, true, false, LIGHTING_SOFTWARE, false >		ProcessMesh010S7_t;
typedef CProcessMeshWrapper< false, true, false, LIGHTING_MOUTH, false >		ProcessMesh010M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< false, true, true, LIGHTING_HARDWARE, false >		ProcessMesh011H7_t;
typedef CProcessMeshWrapper< false, true, true, LIGHTING_SOFTWARE, false >		ProcessMesh011S7_t;
typedef CProcessMeshWrapper< false, true, true, LIGHTING_MOUTH, false >			ProcessMesh011M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, false, false, LIGHTING_HARDWARE, false >		ProcessMesh100H7_t;
typedef CProcessMeshWrapper< true, false, false, LIGHTING_SOFTWARE, false >		ProcessMesh100S7_t;
typedef CProcessMeshWrapper< true, false, false, LIGHTING_MOUTH, false >		ProcessMesh100M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, false, true, LIGHTING_HARDWARE, false >		ProcessMesh101H7_t;
typedef CProcessMeshWrapper< true, false, true, LIGHTING_SOFTWARE, false >		ProcessMesh101S7_t;
typedef CProcessMeshWrapper< true, false, true, LIGHTING_MOUTH, false >			ProcessMesh101M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, true, false, LIGHTING_HARDWARE, false >		ProcessMesh110H7_t;
typedef CProcessMeshWrapper< true, true, false, LIGHTING_SOFTWARE, false >		ProcessMesh110S7_t;
typedef CProcessMeshWrapper< true, true, false, LIGHTING_MOUTH, false >			ProcessMesh110M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, true, true, LIGHTING_HARDWARE, false >		ProcessMesh111H7_t;
typedef CProcessMeshWrapper< true, true, true, LIGHTING_SOFTWARE, false >		ProcessMesh111S7_t;
typedef CProcessMeshWrapper< true, true, true, LIGHTING_MOUTH, false >			ProcessMesh111M7_t;
#endif

#if !defined( _X360 )
typedef CProcessMeshWrapper< false, false, false, LIGHTING_HARDWARE, true >		ProcessMesh000H8_t;
typedef CProcessMeshWrapper< false, false, false, LIGHTING_SOFTWARE, true >		ProcessMesh000S8_t;
typedef CProcessMeshWrapper< false, false, false, LIGHTING_MOUTH, true >		ProcessMesh000M8_t;
#endif

typedef CProcessMeshWrapper< false, false, true, LIGHTING_HARDWARE, true >		ProcessMesh001H8_t;
typedef CProcessMeshWrapper< false, false, true, LIGHTING_SOFTWARE, true >		ProcessMesh001S8_t;
typedef CProcessMeshWrapper< false, false, true, LIGHTING_MOUTH, true >			ProcessMesh001M8_t;

#if !defined( _X360 )
typedef CProcessMeshWrapper< false, true, false, LIGHTING_HARDWARE, true >		ProcessMesh010H8_t;
typedef CProcessMeshWrapper< false, true, false, LIGHTING_SOFTWARE, true >		ProcessMesh010S8_t;
typedef CProcessMeshWrapper< false, true, false, LIGHTING_MOUTH, true >			ProcessMesh010M8_t;
#endif

typedef CProcessMeshWrapper< false, true, true, LIGHTING_HARDWARE, true >		ProcessMesh011H8_t;
typedef CProcessMeshWrapper< false, true, true, LIGHTING_SOFTWARE, true >		ProcessMesh011S8_t;
typedef CProcessMeshWrapper< false, true, true, LIGHTING_MOUTH, true >			ProcessMesh011M8_t;

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, false, false, LIGHTING_HARDWARE, true >		ProcessMesh100H8_t;
typedef CProcessMeshWrapper< true, false, false, LIGHTING_SOFTWARE, true >		ProcessMesh100S8_t;
typedef CProcessMeshWrapper< true, false, false, LIGHTING_MOUTH, true >			ProcessMesh100M8_t;
#endif

typedef CProcessMeshWrapper< true, false, true, LIGHTING_HARDWARE, true >		ProcessMesh101H8_t;
typedef CProcessMeshWrapper< true, false, true, LIGHTING_SOFTWARE, true >		ProcessMesh101S8_t;
typedef CProcessMeshWrapper< true, false, true, LIGHTING_MOUTH, true >			ProcessMesh101M8_t;

#if !defined( _X360 )
typedef CProcessMeshWrapper< true, true, false, LIGHTING_HARDWARE, true >		ProcessMesh110H8_t;
typedef CProcessMeshWrapper< true, true, false, LIGHTING_SOFTWARE, true >		ProcessMesh110S8_t;
typedef CProcessMeshWrapper< true, true, false, LIGHTING_MOUTH, true >			ProcessMesh110M8_t;
#endif

typedef CProcessMeshWrapper< true, true, true, LIGHTING_HARDWARE, true >		ProcessMesh111H8_t;
typedef CProcessMeshWrapper< true, true, true, LIGHTING_SOFTWARE, true >		ProcessMesh111S8_t;
typedef CProcessMeshWrapper< true, true, true, LIGHTING_MOUTH, true >			ProcessMesh111M8_t;

static SoftwareProcessMeshFunc_t g_SoftwareProcessMeshFunc[] =
{
#if !defined( _X360 )
	ProcessMesh000H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh000S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh000M7_t::R_StudioSoftwareProcessMesh,

	ProcessMesh001H7_t::R_StudioSoftwareProcessMesh,
#ifdef SPECIAL_SSE_MESH_PROCESSOR
	ProcessMesh001S7_t::R_StudioSoftwareProcessMeshSSE_DX7,
	ProcessMesh001M7_t::R_StudioSoftwareProcessMeshSSE_DX7,
#else
	ProcessMesh001S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh001M7_t::R_StudioSoftwareProcessMesh,
#endif

	ProcessMesh010H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh010S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh010M7_t::R_StudioSoftwareProcessMesh,

	ProcessMesh011H7_t::R_StudioSoftwareProcessMesh,
#ifdef SPECIAL_SSE_MESH_PROCESSOR
	ProcessMesh011S7_t::R_StudioSoftwareProcessMeshSSE_DX7,
	ProcessMesh011M7_t::R_StudioSoftwareProcessMeshSSE_DX7,
#else
	ProcessMesh011S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh011M7_t::R_StudioSoftwareProcessMesh,
#endif

	ProcessMesh100H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh100S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh100M7_t::R_StudioSoftwareProcessMesh,

	ProcessMesh101H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh101S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh101M7_t::R_StudioSoftwareProcessMesh,

	ProcessMesh110H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh110S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh110M7_t::R_StudioSoftwareProcessMesh,

	ProcessMesh111H7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh111S7_t::R_StudioSoftwareProcessMesh,
	ProcessMesh111M7_t::R_StudioSoftwareProcessMesh,
#endif

#if !defined( _X360 )
	ProcessMesh000H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh000S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh000M8_t::R_StudioSoftwareProcessMesh,
#endif
	ProcessMesh001H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh001S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh001M8_t::R_StudioSoftwareProcessMesh,
#if !defined( _X360 )
	ProcessMesh010H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh010S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh010M8_t::R_StudioSoftwareProcessMesh,
#endif
	ProcessMesh011H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh011S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh011M8_t::R_StudioSoftwareProcessMesh,
#if !defined( _X360 )
	ProcessMesh100H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh100S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh100M8_t::R_StudioSoftwareProcessMesh,
#endif
	ProcessMesh101H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh101S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh101M8_t::R_StudioSoftwareProcessMesh,
#if !defined( _X360 )
	ProcessMesh110H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh110S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh110M8_t::R_StudioSoftwareProcessMesh,
#endif
	ProcessMesh111H8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh111S8_t::R_StudioSoftwareProcessMesh,
	ProcessMesh111M8_t::R_StudioSoftwareProcessMesh,
};

inline const mstudio_meshvertexdata_t * GetFatVertexData( mstudiomesh_t * pMesh, studiohdr_t * pStudioHdr )
{
	if ( !pMesh->pModel()->CacheVertexData( pStudioHdr ) )
	{
		// not available yet
		return NULL;
	}
	const mstudio_meshvertexdata_t *pVertData = pMesh->GetVertexData( pStudioHdr );
	Assert( pVertData );
	if ( !pVertData )
	{
		static unsigned int warnCount = 0;
		if ( warnCount++ < 20 )
			Warning( "ERROR: model verts have been compressed, cannot render! (use \"-no_compressed_vvds\")" );
	}
	return pVertData;
}

void CStudioRender::R_StudioSoftwareProcessMesh( mstudiomesh_t* pmesh, CMeshBuilder& meshBuilder, 
		int numVertices, unsigned short* pGroupToMesh, StudioModelLighting_t lighting, bool doFlex, float r_blend,
		bool bNeedsTangentSpace, bool bDX8Vertex, IMaterial *pMaterial )
{
	unsigned int nAlphaMask = RoundFloatToInt( r_blend * 255.0f ); 
	nAlphaMask = clamp( nAlphaMask, 0, 255 );
	nAlphaMask <<= 24;

	// FIXME: Use function pointers to simplify this?!?
	int idx;
	if ( IsPC() )
	{
		idx	= bDX8Vertex * 24 + bNeedsTangentSpace * 12 + doFlex * 6 + MathLib_SSEEnabled() * 3 + lighting;
	}
	else
	{
		idx = bNeedsTangentSpace * 6 + doFlex * 3 + lighting;
	}

	const mstudio_meshvertexdata_t *pVertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( pVertData )
	{
		// invoke the software mesh processing handler
		g_SoftwareProcessMeshFunc[idx]( pVertData, m_PoseToWorld, m_VertexCache, meshBuilder, numVertices, pGroupToMesh, nAlphaMask, pMaterial ); 
	}
}

static void R_SlowTransformVert( const Vector *pSrcPos, const Vector *pSrcNorm,
	matrix3x4_t *pSkinMat, VectorAligned &pos, VectorAligned &norm )
{
	pos.x  = pSrcPos->x *  (*pSkinMat)[0][0] + pSrcPos->y *  (*pSkinMat)[0][1] + pSrcPos->z *  (*pSkinMat)[0][2] + (*pSkinMat)[0][3];
	norm.x = pSrcNorm->x * (*pSkinMat)[0][0] + pSrcNorm->y * (*pSkinMat)[0][1] + pSrcNorm->z * (*pSkinMat)[0][2];

	pos.y  = pSrcPos->x *  (*pSkinMat)[1][0] + pSrcPos->y *  (*pSkinMat)[1][1] + pSrcPos->z *  (*pSkinMat)[1][2] + (*pSkinMat)[1][3];
	norm.y = pSrcNorm->x * (*pSkinMat)[1][0] + pSrcNorm->y * (*pSkinMat)[1][1] + pSrcNorm->z * (*pSkinMat)[1][2];

	pos.z  = pSrcPos->x *  (*pSkinMat)[2][0] + pSrcPos->y *  (*pSkinMat)[2][1] + pSrcPos->z *  (*pSkinMat)[2][2] + (*pSkinMat)[2][3];
	norm.z = pSrcNorm->x * (*pSkinMat)[2][0] + pSrcNorm->y * (*pSkinMat)[2][1] + pSrcNorm->z * (*pSkinMat)[2][2];
}

static void R_SlowTransformVert( const Vector *pSrcPos, const Vector *pSrcNorm, const Vector4D *pSrcTangentS,
	matrix3x4_t *pSkinMat, VectorAligned &pos, VectorAligned &norm, VectorAligned &tangentS )
{
	pos.x      = pSrcPos->x *      (*pSkinMat)[0][0] + pSrcPos->y *      (*pSkinMat)[0][1] + pSrcPos->z *      (*pSkinMat)[0][2] + (*pSkinMat)[0][3];
	norm.x     = pSrcNorm->x *     (*pSkinMat)[0][0] + pSrcNorm->y *     (*pSkinMat)[0][1] + pSrcNorm->z *     (*pSkinMat)[0][2];
	tangentS.x = pSrcTangentS->x * (*pSkinMat)[0][0] + pSrcTangentS->y * (*pSkinMat)[0][1] + pSrcTangentS->z * (*pSkinMat)[0][2];

	pos.y      = pSrcPos->x *      (*pSkinMat)[1][0] + pSrcPos->y *      (*pSkinMat)[1][1] + pSrcPos->z *      (*pSkinMat)[1][2] + (*pSkinMat)[1][3];
	norm.y     = pSrcNorm->x *     (*pSkinMat)[1][0] + pSrcNorm->y *     (*pSkinMat)[1][1] + pSrcNorm->z *     (*pSkinMat)[1][2];
	tangentS.y = pSrcTangentS->x * (*pSkinMat)[1][0] + pSrcTangentS->y * (*pSkinMat)[1][1] + pSrcTangentS->z * (*pSkinMat)[1][2];

	pos.z      = pSrcPos->x *      (*pSkinMat)[2][0] + pSrcPos->y *      (*pSkinMat)[2][1] + pSrcPos->z *      (*pSkinMat)[2][2] + (*pSkinMat)[2][3];
	norm.z     = pSrcNorm->x *     (*pSkinMat)[2][0] + pSrcNorm->y *     (*pSkinMat)[2][1] + pSrcNorm->z *     (*pSkinMat)[2][2];
	tangentS.z = pSrcTangentS->x * (*pSkinMat)[2][0] + pSrcTangentS->y * (*pSkinMat)[2][1] + pSrcTangentS->z * (*pSkinMat)[2][2];
}

void CStudioRender::R_StudioSoftwareProcessMesh_Normals( mstudiomesh_t* pmesh, CMeshBuilder& meshBuilder, 
		int numVertices, unsigned short* pGroupToMesh, StudioModelLighting_t lighting, bool doFlex, float r_blend,
		bool bShowNormals, bool bShowTangentFrame )
{
	ALIGN16 matrix3x4_t temp ALIGN16_POST;
	ALIGN16 matrix3x4_t *pSkinMat ALIGN16_POST;

	Vector *pSrcPos = NULL;
	Vector *pSrcNorm = NULL;
	Vector4D *pSrcTangentS = NULL;
	VectorAligned norm, pos, tangentS, tangentT;

	// Gets at the vertex data
	const mstudio_meshvertexdata_t *vertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( !vertData )
	{
		// not available
		return;
	}

	if ( bShowTangentFrame && !vertData->HasTangentData() )
		return;

	mstudiovertex_t *pVertices = vertData->Vertex( 0 );

	Vector4D *pTangentS = NULL;
	Vector4D tang;
	if ( bShowTangentFrame )
	{
		pTangentS = vertData->TangentS( 0 );
	}

	for ( int j=0; j < numVertices; j++ )
	{
		int n = pGroupToMesh[j];

		mstudiovertex_t &vert = pVertices[n];
		if ( bShowTangentFrame )
		{
			tang = pTangentS[n];
		}

		pSkinMat = ComputeSkinMatrix( vert.m_BoneWeights, m_PoseToWorld, temp );

		// transform into world space
		if ( m_VertexCache.IsVertexFlexed(n) )
		{
			CachedPosNormTan_t* pFlexedVertex = m_VertexCache.GetFlexVertex(n);
			pSrcPos = &pFlexedVertex->m_Position;
			pSrcNorm = &pFlexedVertex->m_Normal;

			if ( bShowTangentFrame )
			{
				pSrcTangentS = &pFlexedVertex->m_TangentS;
			}
		}
		else
		{
			pSrcPos = &vert.m_vecPosition;
			pSrcNorm = &vert.m_vecNormal;
			if ( bShowTangentFrame )
			{
				pSrcTangentS = &tang;
			}
		}

		// Transform the vert into world space
		if ( bShowTangentFrame && ( pSrcTangentS != NULL ) )
		{
			R_SlowTransformVert( pSrcPos, pSrcNorm, pSrcTangentS, pSkinMat, pos, norm, tangentS );
		}
		else
		{
			R_SlowTransformVert( pSrcPos, pSrcNorm, pSkinMat, pos, norm );
		}

		if ( bShowNormals )
		{
			meshBuilder.Position3fv( pos.Base() );
			meshBuilder.Color3f( 0.0f, 0.0f, 1.0f );
			meshBuilder.AdvanceVertex();

			Vector normalPos;
			normalPos = pos + norm * 0.5f;
			meshBuilder.Position3fv( normalPos.Base() );
			meshBuilder.Color3f( 0.0f, 0.0f, 1.0f );
			meshBuilder.AdvanceVertex();
		}

		if ( bShowTangentFrame && ( pSrcTangentS != NULL) )
		{
			// TangentS
			meshBuilder.Position3fv( pos.Base() );
			meshBuilder.Color3f( 1.0f, 0.0f, 0.0f );
			meshBuilder.AdvanceVertex();

			Vector vTangentSPos;
			vTangentSPos = pos + tangentS * 0.5f;
			meshBuilder.Position3fv( vTangentSPos.Base() );
			meshBuilder.Color3f( 1.0f, 0.0f, 0.0f );
			meshBuilder.AdvanceVertex();

			// TangentT
			meshBuilder.Position3fv( pos.Base() );
			meshBuilder.Color3f( 0.0f, 1.0f, 0.0f );
			meshBuilder.AdvanceVertex();

			// Compute tangentT from normal and tangentS
			CrossProduct( norm, tangentS, tangentT );

			Vector vTangentTPos;
			vTangentTPos = pos + tangentT * 0.5f;
			meshBuilder.Position3fv( vTangentTPos.Base() );
			meshBuilder.Color3f( 0.0f, 1.0f, 0.0f );
			meshBuilder.AdvanceVertex();

		} // end tacking on tangentS and tangetT line segments
	}
}

#pragma warning (default:4701)



template
void CCachedRenderData::ComputeFlexedVertex_StreamOffset<mstudiovertanim_t>( studiohdr_t *pStudioHdr, mstudioflex_t *pflex, 
														 mstudiovertanim_t *pvanim, int vertCount, float w1, float w2, float w3, float w4 );



void CStudioRender::R_StudioProcessFlexedMesh_StreamOffset( mstudiomesh_t* pmesh, int lod )
{
	VPROF_BUDGET( "ProcessFlexedMesh_SO", _T("HW Morphing") );

	if ( m_VertexCache.IsFlexComputationDone() )
		return;

	int vertCount = pmesh->vertexdata.numLODVertexes[lod];
	m_VertexCache.SetupComputation( pmesh, true );
	mstudioflex_t *pflex = pmesh->pFlex( 0 );

	for (int i = 0; i < pmesh->numflexes; i++)
	{
		float w1 = RampFlexWeight( pflex[i], m_pFlexWeights[ pflex[i].flexdesc ] );
		float w2 = RampFlexWeight( pflex[i], m_pFlexDelayedWeights[ pflex[i].flexdesc ] );

		float w3, w4;
		if ( pflex[i].flexpair != 0)
		{
			w3 = RampFlexWeight( pflex[i], m_pFlexWeights[ pflex[i].flexpair ] );
			w4 = RampFlexWeight( pflex[i], m_pFlexDelayedWeights[ pflex[i].flexpair ] );
		}
		else
		{
			w3 = w1;
			w4 = w2;
		}

		// Move on if the weights for this flex are sufficiently small
		if (w1 > -0.001 && w1 < 0.001 && w2 > -0.001 && w2 < 0.001)
		{
			if (w3 > -0.001 && w3 < 0.001 && w4 > -0.001 && w4 < 0.001)
			{
				continue;
			}
		}

#ifdef PLATFORM_WINDOWS
		if ( pflex[i].vertanimtype == STUDIO_VERT_ANIM_NORMAL )
		{
			mstudiovertanim_t *pvanim = pflex[i].pVertanim( 0 );
			m_VertexCache.ComputeFlexedVertex_StreamOffset_Optimized( m_pStudioHdr, &pflex[i], pvanim, vertCount, w1, w2, w3, w4 );
		}
		else
		{
			mstudiovertanim_wrinkle_t *pvanim = pflex[i].pVertanimWrinkle( 0 );
			m_VertexCache.ComputeFlexedVertexWrinkle_StreamOffset_Optimized( m_pStudioHdr, &pflex[i], pvanim, vertCount, w1, w2, w3, w4 );
		}
#else // PLATFORM_WINDOWS
		if ( pflex[i].vertanimtype == STUDIO_VERT_ANIM_NORMAL )
		{
			mstudiovertanim_t *pvanim = pflex[i].pVertanim( 0 );
			m_VertexCache.ComputeFlexedVertex_StreamOffset( m_pStudioHdr, &pflex[i], pvanim, vertCount, w1, w2, w3, w4 );
		}
		else
		{
			mstudiovertanim_wrinkle_t *pvanim = pflex[i].pVertanimWrinkle( 0 );
			m_VertexCache.ComputeFlexedVertex_StreamOffset( m_pStudioHdr, &pflex[i], pvanim, vertCount, w1, w2, w3, w4 );
		}
#endif // PLATFORM_WINDOWS
	}
}


//-----------------------------------------------------------------------------
// Purpose: 
//
//  ** Only execute this function if device supports stream offset **
//
// Input  : pGroup - pointer to a studio mesh group
// Output : none
//-----------------------------------------------------------------------------
void CStudioRender::R_StudioFlexMeshGroup( studiomeshgroup_t *pGroup )
{
	VPROF_BUDGET( "R_StudioFlexMeshGroup", VPROF_BUDGETGROUP_MODEL_RENDERING );

	CMeshBuilder meshBuilder;
	int nVertexOffsetInBytes = 0;
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	IMesh *pMesh = pRenderContext->GetFlexMesh();
	meshBuilder.Begin( pMesh, MATERIAL_HETEROGENOUS, pGroup->m_NumVertices, 0, &nVertexOffsetInBytes );

	// Just pos and norm deltas (tangents use same deltas as normals)
	for ( int j=0; j < pGroup->m_NumVertices; j++)
	{
		int n = pGroup->m_pGroupIndexToMeshIndex[j];
		if ( m_VertexCache.IsThinVertexFlexed(n) )
		{
			CachedPosNorm_t *pIn = m_VertexCache.GetThinFlexVertex(n);
			meshBuilder.Position3fv( pIn->m_Position.Base() );
			meshBuilder.NormalDelta3fv( pIn->m_Normal.Base() );
			meshBuilder.Wrinkle1f( pIn->m_Position.w );
		}
		else
		{
			meshBuilder.Position3f( 0.0f, 0.0f, 0.0f );
			meshBuilder.NormalDelta3f( 0.0f, 0.0f, 0.0f );
			meshBuilder.Wrinkle1f( 0.0f );
		}
		meshBuilder.AdvanceVertex();
	}

	meshBuilder.End( false, false );

	pGroup->m_pMesh->SetFlexMesh( pMesh, nVertexOffsetInBytes );
}

//-----------------------------------------------------------------------------
// Processes a flexed mesh to be hw skinned
//-----------------------------------------------------------------------------
void CStudioRender::R_StudioProcessFlexedMesh( mstudiomesh_t* pmesh, CMeshBuilder& meshBuilder, 
											   int numVertices, unsigned short* pGroupToMesh )
{
	PROFILE_STUDIO("FlexMeshBuilder");

	Vector4D *pStudioTangentS;

	// get the vertex data
	const mstudio_meshvertexdata_t *vertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( !vertData )
	{
		// not available
		return;
	}
	mstudiovertex_t *pVertices = vertData->Vertex( 0 );

	if (vertData->HasTangentData())
	{
		pStudioTangentS = vertData->TangentS( 0 );
		Assert( pStudioTangentS->w == -1.0f || pStudioTangentS->w == 1.0f );

		for ( int j=0; j < numVertices ; j++)
		{
			int n = pGroupToMesh[j];
			mstudiovertex_t &vert = pVertices[n];

			// FIXME: For now, flexed hw-skinned meshes can only have one bone
			// The data must exist in the 0th hardware matrix

			// Here, we are doing HW skinning, so we need to simply copy over the flex
			if ( m_VertexCache.IsVertexFlexed(n) )
			{
				CachedPosNormTan_t* pFlexedVertex = m_VertexCache.GetFlexVertex(n);
				meshBuilder.Position3fv( pFlexedVertex->m_Position.Base() );
				meshBuilder.BoneWeight( 0, 1.0f );
				meshBuilder.BoneWeight( 1, 0.0f );
				meshBuilder.BoneWeight( 2, 0.0f );
				meshBuilder.BoneWeight( 3, 0.0f );
				meshBuilder.BoneMatrix( 0, 0 );
				meshBuilder.BoneMatrix( 1, 0 );
				meshBuilder.BoneMatrix( 2, 0 );
				meshBuilder.BoneMatrix( 3, 0 );
				meshBuilder.Normal3fv( pFlexedVertex->m_Normal.Base() );
				meshBuilder.TexCoord2fv( 0, vert.m_vecTexCoord.Base() );
				Assert( pFlexedVertex->m_TangentS.w == -1.0f || pFlexedVertex->m_TangentS.w == 1.0f );
				meshBuilder.UserData( pFlexedVertex->m_TangentS.Base() );
			}
			else
			{
				meshBuilder.Position3fv( vert.m_vecPosition.Base() );
				meshBuilder.BoneWeight( 0, 1.0f );
				meshBuilder.BoneWeight( 1, 0.0f );
				meshBuilder.BoneWeight( 2, 0.0f );
				meshBuilder.BoneWeight( 3, 0.0f );
				meshBuilder.BoneMatrix( 0, 0 );
				meshBuilder.BoneMatrix( 1, 0 );
				meshBuilder.BoneMatrix( 2, 0 );
				meshBuilder.BoneMatrix( 3, 0 );
				meshBuilder.Normal3fv( vert.m_vecNormal.Base() );
				meshBuilder.TexCoord2fv( 0, vert.m_vecTexCoord.Base() );
				Assert( pStudioTangentS[n].w == -1.0f || pStudioTangentS[n].w == 1.0f );
				meshBuilder.UserData( pStudioTangentS[n].Base() );
			}

			meshBuilder.AdvanceVertex();
		}
	}
	else
	{
		// no TangentS, replicated code to save inner conditional
		for ( int j=0; j < numVertices ; j++)
		{
			int n = pGroupToMesh[j];
			mstudiovertex_t &vert = pVertices[n];

			// FIXME: For now, flexed hw-skinned meshes can only have one bone
			// The data must exist in the 0th hardware matrix

			// Here, we are doing HW skinning, so we need to simply copy over the flex
			if ( m_VertexCache.IsVertexFlexed(n) )
			{
				CachedPosNormTan_t* pFlexedVertex = m_VertexCache.GetFlexVertex(n);
				meshBuilder.Position3fv( pFlexedVertex->m_Position.Base() );
				meshBuilder.BoneWeight( 0, 1.0f );
				meshBuilder.BoneWeight( 1, 0.0f );
				meshBuilder.BoneWeight( 2, 0.0f );
				meshBuilder.BoneWeight( 3, 0.0f );
				meshBuilder.BoneMatrix( 0, 0 );
				meshBuilder.BoneMatrix( 1, 0 );
				meshBuilder.BoneMatrix( 2, 0 );
				meshBuilder.BoneMatrix( 3, 0 );
				meshBuilder.Normal3fv( pFlexedVertex->m_Normal.Base() );
			}
			else
			{
				meshBuilder.Position3fv( vert.m_vecPosition.Base() );
				meshBuilder.BoneWeight( 0, 1.0f );
				meshBuilder.BoneWeight( 1, 0.0f );
				meshBuilder.BoneWeight( 2, 0.0f );
				meshBuilder.BoneWeight( 3, 0.0f );
				meshBuilder.BoneMatrix( 0, 0 );
				meshBuilder.BoneMatrix( 1, 0 );
				meshBuilder.BoneMatrix( 2, 0 );
				meshBuilder.BoneMatrix( 3, 0 );
				meshBuilder.Normal3fv( vert.m_vecNormal.Base() );
			}
			meshBuilder.TexCoord2fv( 0, vert.m_vecTexCoord.Base() );
			meshBuilder.AdvanceVertex();
		}
	}
}

//-----------------------------------------------------------------------------
// Restores the static mesh
//-----------------------------------------------------------------------------
template<VertexCompressionType_t T> void CStudioRender::R_StudioRestoreMesh( mstudiomesh_t* pmesh, studiomeshgroup_t* pMeshData )
{
	Vector4D *pStudioTangentS;

	if ( IsX360() )
		return;

	// get at the vertex data
	const mstudio_meshvertexdata_t *vertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( !vertData )
	{
		// not available
		return;
	}
	mstudiovertex_t *pVertices = vertData->Vertex( 0 );

	if (vertData->HasTangentData())
	{
		pStudioTangentS = vertData->TangentS( 0 );
	}
	else
	{
		pStudioTangentS = NULL;
	}

	CMeshBuilder meshBuilder;

	meshBuilder.BeginModify( pMeshData->m_pMesh );
	meshBuilder.SetCompressionType( T );
	for ( int j=0; j < meshBuilder.VertexCount() ; j++)
	{
		meshBuilder.SelectVertex(j);
		int n = pMeshData->m_pGroupIndexToMeshIndex[j];
		mstudiovertex_t &vert = pVertices[n];

		meshBuilder.Position3fv( vert.m_vecPosition.Base() );
		meshBuilder.CompressedNormal3fv<T>( vert.m_vecNormal.Base() );
		meshBuilder.TexCoord2fv( 0, vert.m_vecTexCoord.Base() );

		if (pStudioTangentS)
		{
			Assert( pStudioTangentS[n].w == -1.0f || pStudioTangentS[n].w == 1.0f );
			meshBuilder.CompressedUserData<T>( pStudioTangentS[n].Base() );
		}

		meshBuilder.Color4ub( 255, 255, 255, 255 );
	}
	meshBuilder.EndModify();
}

//-----------------------------------------------------------------------------
// Draws a mesh using hardware + software skinning
//-----------------------------------------------------------------------------
int CStudioRender::R_StudioDrawGroupHWSkin( IMatRenderContext *pRenderContext, studiomeshgroup_t* pGroup, IMesh* pMesh, ColorMeshInfo_t * pColorMeshInfo )
{
	PROFILE_STUDIO("HwSkin");
	int numTrianglesRendered = 0;

#if PIX_ENABLE
	char szPIXEventName[128];
	sprintf( szPIXEventName, "R_StudioDrawGroupHWSkin (%s)", m_pStudioHdr->name );	// PIX
	PIXEVENT( pRenderContext, szPIXEventName );
#endif

	if ( m_pStudioHdr->numbones == 1 )
	{
		pRenderContext->MatrixMode( MATERIAL_MODEL );
		pRenderContext->LoadMatrix( m_PoseToWorld[0] );

		// a single bone means all verts rigidly assigned
		// any bonestatechange would needlessly re-load the same matrix
		// xbox can skip further hw skinning, seems ok for pc too
		pRenderContext->SetNumBoneWeights( 0 );
	}

	if ( pColorMeshInfo )
		pMesh->SetColorMesh( pColorMeshInfo->m_pMesh, pColorMeshInfo->m_nVertOffsetInBytes );
	else
		pMesh->SetColorMesh( NULL, 0 );

	for (int j = 0; j < pGroup->m_NumStrips; ++j)
	{
		OptimizedModel::StripHeader_t* pStrip = &pGroup->m_pStripData[j];

		if ( m_pStudioHdr->numbones > 1 )
		{
			// Reset bone state if we're hardware skinning
			pRenderContext->SetNumBoneWeights( pStrip->numBones );

			for (int k = 0; k < pStrip->numBoneStateChanges; ++k)
			{
				OptimizedModel::BoneStateChangeHeader_t* pStateChange = pStrip->pBoneStateChange(k);
				if ( pStateChange->newBoneID < 0 )
					break;

				pRenderContext->LoadBoneMatrix( pStateChange->hardwareID, m_PoseToWorld[pStateChange->newBoneID] );
			}
		}

		pMesh->SetPrimitiveType( pStrip->flags & OptimizedModel::STRIP_IS_TRISTRIP ? 
			MATERIAL_TRIANGLE_STRIP : MATERIAL_TRIANGLES );

		pMesh->Draw( pStrip->indexOffset, pStrip->numIndices );
		numTrianglesRendered += pGroup->m_pUniqueTris[j];
	}
	pMesh->SetColorMesh( NULL, 0 );

	return numTrianglesRendered;
}

int CStudioRender::R_StudioDrawGroupSWSkin( studiomeshgroup_t* pGroup, IMesh* pMesh )
{
	int numTrianglesRendered = 0;
	
	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
	// Disable skinning
	pRenderContext->SetNumBoneWeights( 0 );

	for (int j = 0; j < pGroup->m_NumStrips; ++j)
	{
		OptimizedModel::StripHeader_t* pStrip = &pGroup->m_pStripData[j];

		// Choose our primitive type
		pMesh->SetPrimitiveType( pStrip->flags & OptimizedModel::STRIP_IS_TRISTRIP ? 
			MATERIAL_TRIANGLE_STRIP : MATERIAL_TRIANGLES );

		pMesh->Draw( pStrip->indexOffset, pStrip->numIndices );
		numTrianglesRendered += pGroup->m_pUniqueTris[j];
	}

	return numTrianglesRendered;
}


//-----------------------------------------------------------------------------
// Sets up the hw flex mesh
//-----------------------------------------------------------------------------
void CStudioRender::ComputeFlexWeights( int nFlexCount, mstudioflex_t *pFlex, MorphWeight_t *pWeights )
{
	for ( int i = 0; i < nFlexCount; ++i, ++pFlex )
	{
		MorphWeight_t &weight = pWeights[i];

		weight.m_pWeight[MORPH_WEIGHT] = RampFlexWeight( *pFlex, m_pFlexWeights[ pFlex->flexdesc ] );
		weight.m_pWeight[MORPH_WEIGHT_LAGGED] = RampFlexWeight( *pFlex, m_pFlexDelayedWeights[ pFlex->flexdesc ] );

		if ( pFlex->flexpair != 0 )
		{
			weight.m_pWeight[MORPH_WEIGHT_STEREO] = RampFlexWeight( *pFlex, m_pFlexWeights[ pFlex->flexpair ] );
			weight.m_pWeight[MORPH_WEIGHT_STEREO_LAGGED] = RampFlexWeight( *pFlex, m_pFlexDelayedWeights[ pFlex->flexpair ] );
		}
		else
		{
			weight.m_pWeight[MORPH_WEIGHT_STEREO] = weight.m_pWeight[MORPH_WEIGHT];
			weight.m_pWeight[MORPH_WEIGHT_STEREO_LAGGED] = weight.m_pWeight[MORPH_WEIGHT_LAGGED];
		}
	}
}


//-----------------------------------------------------------------------------
// Computes a vertex format to use
//-----------------------------------------------------------------------------
inline VertexFormat_t CStudioRender::ComputeSWSkinVertexFormat( IMaterial *pMaterial ) const
{
	bool bDX8OrHigherVertex = IsX360() || ( UserDataSize( pMaterial->GetVertexFormat() ) != 0 );
	VertexFormat_t fmt = VERTEX_POSITION | VERTEX_NORMAL | VERTEX_COLOR | VERTEX_BONE_INDEX | 
		VERTEX_BONEWEIGHT( 2 ) | VERTEX_TEXCOORD_SIZE( 0, 2 );
	if ( bDX8OrHigherVertex )
	{
		fmt |= VERTEX_USERDATA_SIZE( 4 );
	}
	return fmt;
}


//-----------------------------------------------------------------------------
// Draws the mesh as tristrips using hardware
//-----------------------------------------------------------------------------
int CStudioRender::R_StudioDrawStaticMesh( IMatRenderContext *pRenderContext, mstudiomesh_t* pmesh, 
				studiomeshgroup_t* pGroup, StudioModelLighting_t lighting, 
				float r_blend, IMaterial* pMaterial, int lod, ColorMeshInfo_t *pColorMeshes  )
{
	MatSysQueueMark( g_pMaterialSystem, "R_StudioDrawStaticMesh\n" );
	VPROF( "R_StudioDrawStaticMesh" );

	int numTrianglesRendered = 0;

	bool bDoSoftwareLighting = !pColorMeshes && 
		((m_pRC->m_Config.bSoftwareSkin != 0) || m_pRC->m_Config.bDrawNormals || m_pRC->m_Config.bDrawTangentFrame ||
		(pMaterial ? pMaterial->NeedsSoftwareSkinning() : false) ||
		(m_pRC->m_Config.bSoftwareLighting != 0) ||
		((lighting != LIGHTING_HARDWARE) && (lighting != LIGHTING_MOUTH) ));

	// software lighting case
	if ( bDoSoftwareLighting || m_pRC->m_Config.m_bStatsMode == true )
	{
		if ( m_pRC->m_Config.bNoSoftware )
			return 0;

		bool bNeedsTangentSpace = pMaterial ? pMaterial->NeedsTangentSpace() : false;
		pRenderContext->MatrixMode( MATERIAL_MODEL );
		pRenderContext->LoadIdentity();

		// Hardcode the vertex format to a well-known format to make sw skin code faster
		VertexFormat_t fmt = ComputeSWSkinVertexFormat( pMaterial );
		bool bDX8Vertex = ( UserDataSize( fmt ) != 0 );

		if ( m_pRC->m_Config.m_bStatsMode == false )
		{
			Assert( ( pGroup->m_Flags & ( MESHGROUP_IS_FLEXED | MESHGROUP_IS_DELTA_FLEXED ) ) == 0 );
		}

		CMeshBuilder meshBuilder;
		IMesh* pMesh = pRenderContext->GetDynamicMeshEx( fmt, false, 0, pGroup->m_pMesh );
		meshBuilder.Begin( pMesh, MATERIAL_HETEROGENOUS, pGroup->m_NumVertices, 0 );

		R_StudioSoftwareProcessMesh( pmesh, meshBuilder, 
			pGroup->m_NumVertices, pGroup->m_pGroupIndexToMeshIndex, 
			lighting, false, r_blend, bNeedsTangentSpace, bDX8Vertex, pMaterial);

		if ( m_pRC->m_Config.m_bStatsMode == true )
		{
			R_GatherStats( pGroup, meshBuilder, pMesh, pMaterial );
		}
		else
		{
			meshBuilder.End();

			numTrianglesRendered = R_StudioDrawGroupSWSkin( pGroup, pMesh );
		}

		MatSysQueueMark( g_pMaterialSystem, "END R_StudioDrawStaticMesh\n" );
		return numTrianglesRendered;
	}

	// Needed when we switch back and forth between hardware + software lighting
	if ( IsPC() && pGroup->m_MeshNeedsRestore )
	{
		VertexCompressionType_t compressionType = CompressionType( pGroup->m_pMesh->GetVertexFormat() );
		switch ( compressionType )
		{
		case VERTEX_COMPRESSION_ON:
			R_StudioRestoreMesh<VERTEX_COMPRESSION_ON>( pmesh, pGroup );
		case VERTEX_COMPRESSION_NONE:
		default:
			R_StudioRestoreMesh<VERTEX_COMPRESSION_NONE>( pmesh, pGroup );
			break;
		}
		pGroup->m_MeshNeedsRestore = false;
	}

	// Build separate flex stream containing deltas, which will get copied into another vertex stream
	bool bUseHWFlex = m_pRC->m_Config.m_bEnableHWMorph && pGroup->m_pMorph && !m_bDrawTranslucentSubModels;
	bool bUseSOFlex = g_pMaterialSystemHardwareConfig->SupportsStreamOffset() && !bUseHWFlex;
	if ( (pGroup->m_Flags & MESHGROUP_IS_DELTA_FLEXED) && m_pRC->m_Config.bFlex )
	{
		PIXEVENT( pRenderContext, "Delta Flex Processing" );
		if ( bUseHWFlex )
		{
			pRenderContext->BindMorph( pGroup->m_pMorph );
		}
		if ( bUseSOFlex )
		{
			R_StudioProcessFlexedMesh_StreamOffset( pmesh, lod );
			R_StudioFlexMeshGroup( pGroup );
		}
	}

	// Draw it baby
	if ( pColorMeshes && ( pGroup->m_ColorMeshID != -1 ) )
	{
		// draw using specified color mesh
		numTrianglesRendered = R_StudioDrawGroupHWSkin( pRenderContext, pGroup, pGroup->m_pMesh, &(pColorMeshes[pGroup->m_ColorMeshID]) );
	}
	else
	{
		numTrianglesRendered = R_StudioDrawGroupHWSkin( pRenderContext, pGroup, pGroup->m_pMesh, NULL );
	}

	if ( ( pGroup->m_Flags & MESHGROUP_IS_DELTA_FLEXED ) && m_pRC->m_Config.bFlex )
	{
		if ( bUseHWFlex )
		{
			pRenderContext->BindMorph( NULL );
		}
		if ( bUseSOFlex )
		{
			pGroup->m_pMesh->DisableFlexMesh();	// clear flex stream
		}
	}

	MatSysQueueMark( g_pMaterialSystem, "END2 R_StudioDrawStaticMesh\n" );
	return numTrianglesRendered;
}


//-----------------------------------------------------------------------------
// Draws a dynamic mesh
//-----------------------------------------------------------------------------
int CStudioRender::R_StudioDrawDynamicMesh( IMatRenderContext *pRenderContext, mstudiomesh_t* pmesh, 
				studiomeshgroup_t* pGroup, StudioModelLighting_t lighting, 
				float r_blend, IMaterial* pMaterial, int lod )
{
	VPROF( "R_StudioDrawDynamicMesh" );

	bool doFlex = ((pGroup->m_Flags & MESHGROUP_IS_FLEXED) != 0) && m_pRC->m_Config.bFlex;

	bool doSoftwareLighting = (m_pRC->m_Config.bSoftwareLighting != 0) ||
		((lighting != LIGHTING_HARDWARE) && (lighting != LIGHTING_MOUTH) );

	bool swSkin = doSoftwareLighting || m_pRC->m_Config.bDrawNormals || m_pRC->m_Config.bDrawTangentFrame ||
		((pGroup->m_Flags & MESHGROUP_IS_HWSKINNED) == 0) ||
		m_pRC->m_Config.bSoftwareSkin ||
		( pMaterial ? pMaterial->NeedsSoftwareSkinning() : false );

	if ( !doFlex && !swSkin )
	{
		return R_StudioDrawStaticMesh( pRenderContext, pmesh, pGroup, lighting, r_blend, pMaterial, lod, NULL );
	}

	// drawers before this might not need the vertexes, so don't pay the penalty of getting them
	// everybody else past this point (flex or swskinning) expects to read vertexes
	// get vertex data
	const mstudio_meshvertexdata_t *vertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( !vertData )
	{
		// not available
		return 0;
	}

	MatSysQueueMark( g_pMaterialSystem, "R_StudioDrawDynamicMesh\n" );

	int numTrianglesRendered = 0;

#ifdef _DEBUG
	const char *pDebugMaterialName = NULL;
	if ( pMaterial )
	{
		pDebugMaterialName = pMaterial->GetName();
	}
#endif
	
	pRenderContext->MatrixMode( MATERIAL_MODEL );
	pRenderContext->LoadIdentity();

	// Software flex verts (not a delta stream)
	if ( doFlex )
	{
		R_StudioFlexVerts( pmesh, lod ); 
	}

	IMesh* pMesh;
	bool bNeedsTangentSpace = pMaterial ? pMaterial->NeedsTangentSpace() : false;

	VertexFormat_t fmt = ComputeSWSkinVertexFormat( pMaterial );
	bool bDX8Vertex = ( UserDataSize( fmt ) != 0 );

	CMeshBuilder meshBuilder;
	pMesh = pRenderContext->GetDynamicMeshEx( fmt, false, 0, pGroup->m_pMesh);
	meshBuilder.Begin( pMesh, MATERIAL_HETEROGENOUS, pGroup->m_NumVertices, 0 );

	if ( swSkin )
	{
		R_StudioSoftwareProcessMesh( pmesh, meshBuilder, pGroup->m_NumVertices,
			pGroup->m_pGroupIndexToMeshIndex, lighting, doFlex, r_blend,
			bNeedsTangentSpace, bDX8Vertex, pMaterial );
	}
	else if ( doFlex )
	{
		R_StudioProcessFlexedMesh( pmesh, meshBuilder, pGroup->m_NumVertices,
									pGroup->m_pGroupIndexToMeshIndex );
	}

	meshBuilder.End();

	// Draw it baby
	if ( !swSkin )
	{
		numTrianglesRendered = R_StudioDrawGroupHWSkin( pRenderContext, pGroup, pMesh );
	}
	else
	{
		numTrianglesRendered = R_StudioDrawGroupSWSkin( pGroup, pMesh );
	}

	if ( m_pRC->m_Config.bDrawNormals || m_pRC->m_Config.bDrawTangentFrame )
	{
		pRenderContext->SetNumBoneWeights( 0 );
		pRenderContext->Bind( m_pMaterialTangentFrame );

		CMeshBuilder meshBuilder;
		pMesh = pRenderContext->GetDynamicMesh( false );
		meshBuilder.Begin( pMesh, MATERIAL_LINES, pGroup->m_NumVertices );

		R_StudioSoftwareProcessMesh_Normals( pmesh, meshBuilder, pGroup->m_NumVertices, 
			pGroup->m_pGroupIndexToMeshIndex, lighting, doFlex, r_blend, m_pRC->m_Config.bDrawNormals, m_pRC->m_Config.bDrawTangentFrame );
		meshBuilder.End( );

		pMesh->Draw();
		pRenderContext->Bind( pMaterial );
	}

	MatSysQueueMark( g_pMaterialSystem, "END R_StudioDrawDynamicMesh\n" );

	return numTrianglesRendered;
}


//-----------------------------------------------------------------------------
// Sets the material vars for the eye vertex shader
//-----------------------------------------------------------------------------
static unsigned int eyeOriginCache = 0;
static unsigned int eyeUpCache = 0;
static unsigned int irisUCache = 0;
static unsigned int irisVCache = 0;
static unsigned int glintUCache = 0;
static unsigned int glintVCache = 0;
void CStudioRender::SetEyeMaterialVars( IMaterial* pMaterial, mstudioeyeball_t* peyeball, 
		Vector const& eyeOrigin, const matrix3x4_t& irisTransform, const matrix3x4_t& glintTransform )
{
	if ( !pMaterial )
		return;

	IMaterialVar* pVar = pMaterial->FindVarFast( "$eyeorigin", &eyeOriginCache );
	if (pVar)
	{
		pVar->SetVecValue( eyeOrigin.Base(), 3 );
	}

	pVar = pMaterial->FindVarFast( "$eyeup", &eyeUpCache );
	if (pVar)
	{
		pVar->SetVecValue( peyeball->up.Base(), 3 );
	}
	pVar = pMaterial->FindVarFast( "$irisu", &irisUCache );
	if (pVar)
	{
		pVar->SetVecValue( irisTransform[0], 4 );
	}

	pVar = pMaterial->FindVarFast( "$irisv", &irisVCache );
	if (pVar)
	{
		pVar->SetVecValue( irisTransform[1], 4 );
	}

	pVar = pMaterial->FindVarFast( "$glintu", &glintUCache );
	if (pVar)
	{
		pVar->SetVecValue( glintTransform[0], 4 );
	}

	pVar = pMaterial->FindVarFast( "$glintv", &glintVCache );
	if (pVar)
	{
		pVar->SetVecValue( glintTransform[1], 4 );
	}
}


//-----------------------------------------------------------------------------
// Specialized routine to draw the eyeball
//-----------------------------------------------------------------------------
static unsigned int glintCache = 0;
int CStudioRender::R_StudioDrawEyeball( IMatRenderContext *pRenderContext, mstudiomesh_t* pmesh, studiomeshdata_t* pMeshData,
	StudioModelLighting_t lighting, IMaterial *pMaterial, int lod )
{
	if ( !m_pRC->m_Config.bEyes )
	{
		return 0;
	}

	// FIXME: We could compile a static vertex buffer in this case
	// if there's no flexed verts.
	const mstudio_meshvertexdata_t *vertData = GetFatVertexData( pmesh, m_pStudioHdr );
	if ( !vertData )
	{
		// not available
		return 0;
	}
	mstudiovertex_t *pVertices = vertData->Vertex( 0 );

	int j;
	int numTrianglesRendered = 0;

	// See if any meshes in the group want to go down the static path...
	bool bIsDeltaFlexed = false;
	bool bIsHardwareSkinnedData = false;
	bool bIsFlexed = false;
	for (j = 0; j < pMeshData->m_NumGroup; ++j)
	{
		studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];

		if ( ( pGroup->m_Flags & MESHGROUP_IS_DELTA_FLEXED ) && g_pMaterialSystemHardwareConfig->SupportsStreamOffset() )
			bIsDeltaFlexed = true;

		if ( pGroup->m_Flags & MESHGROUP_IS_FLEXED )
			bIsFlexed = true;

		if ( pGroup->m_Flags & MESHGROUP_IS_HWSKINNED )
			bIsHardwareSkinnedData = true;
	}

	// Take the static path for new flexed models on DX9 hardware
	bool bFlexStatic = bIsDeltaFlexed && g_pMaterialSystemHardwareConfig->SupportsStreamOffset();
	bool bShouldHardwareSkin = bIsHardwareSkinnedData && ( !bIsFlexed || bFlexStatic ) && 
		( lighting != LIGHTING_SOFTWARE ) && ( !m_pRC->m_Config.bSoftwareSkin );

	pRenderContext->MatrixMode( MATERIAL_MODEL );
	pRenderContext->LoadIdentity();

	// Software flex eyeball verts (not a delta stream)
	if ( bIsFlexed && ( !bFlexStatic || !bShouldHardwareSkin ) )
	{
		R_StudioFlexVerts( pmesh, lod );
	}

	mstudioeyeball_t *peyeball = m_pSubModel->pEyeball(pmesh->materialparam);

	// We'll need this to compute normals
	Vector org;
	VectorTransform( peyeball->org, m_pBoneToWorld[peyeball->bone], org );

	// Compute the glint projection
	matrix3x4_t glintMat;
	ComputeGlintTextureProjection( &m_pEyeballState[pmesh->materialparam], m_pRC->m_ViewRight, m_pRC->m_ViewUp, glintMat );
	
	if ( !m_pRC->m_Config.bWireframe )
	{
		// Compute the glint procedural texture
		IMaterialVar* pGlintVar = pMaterial->FindVarFast( "$glint", &glintCache );
		if (pGlintVar)
		{
			R_StudioEyeballGlint( &m_pEyeballState[pmesh->materialparam], pGlintVar, m_pRC->m_ViewRight, m_pRC->m_ViewUp, m_pRC->m_ViewOrigin );
		}
		SetEyeMaterialVars( pMaterial, peyeball, org, m_pEyeballState[pmesh->materialparam].mat, glintMat );
	}

	if ( bShouldHardwareSkin )
	{
		for ( j = 0; j < pMeshData->m_NumGroup; ++j )
		{
			studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];
			numTrianglesRendered += R_StudioDrawStaticMesh( pRenderContext, pmesh, pGroup, lighting, m_pRC->m_AlphaMod, pMaterial, lod, NULL );
		}

		return numTrianglesRendered;
	}

	pRenderContext->SetNumBoneWeights( 0 );
	m_VertexCache.SetupComputation( pmesh );

	int nAlpnaInt = RoundFloatToInt( m_pRC->m_AlphaMod * 255 );
	unsigned char a = clamp( nAlpnaInt, 0, 255 );

	Vector position, normal, color;

	// setup the call
	R_InitLightEffectsWorld3();

	// Render the puppy
	CMeshBuilder meshBuilder;

	bool useHWLighting = m_pRC->m_Config.m_bSupportsVertexAndPixelShaders && !m_pRC->m_Config.bSoftwareLighting;
	// Draw all the various mesh groups...
	for ( j = 0; j < pMeshData->m_NumGroup; ++j )
	{
		studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];

		IMesh* pMesh = pRenderContext->GetDynamicMesh(false, 0, pGroup->m_pMesh);

		// garymcthack!  need to look at the strip flags to figure out what it is.
		meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, pmesh->numvertices, 0 );
//		meshBuilder.Begin( pMesh, MATERIAL_TRIANGLE_STRIP, pmesh->numvertices, 0 );
		//VPROF_INCREMENT_COUNTER( "TransformFlexVerts", pGroup->m_NumVertices );

		for ( int i=0; i < pGroup->m_NumVertices; ++i)
		{
			int n = pGroup->m_pGroupIndexToMeshIndex[i];
			mstudiovertex_t	&vert = pVertices[n];

			CachedPosNorm_t* pWorldVert = m_VertexCache.CreateWorldVertex(n);

			// transform into world space
			if ( m_VertexCache.IsVertexFlexed(n) )
			{
				CachedPosNormTan_t* pFlexVert = m_VertexCache.GetFlexVertex(n);
				R_StudioTransform( pFlexVert->m_Position, &vert.m_BoneWeights, pWorldVert->m_Position.AsVector3D() );
				R_StudioRotate( pFlexVert->m_Normal, &vert.m_BoneWeights, pWorldVert->m_Normal.AsVector3D() );
				Assert( pWorldVert->m_Normal.x >= -1.05f && pWorldVert->m_Normal.x <= 1.05f );
				Assert( pWorldVert->m_Normal.y >= -1.05f && pWorldVert->m_Normal.y <= 1.05f );
				Assert( pWorldVert->m_Normal.z >= -1.05f && pWorldVert->m_Normal.z <= 1.05f );
			}
			else
			{
				R_StudioTransform( vert.m_vecPosition, &vert.m_BoneWeights, pWorldVert->m_Position.AsVector3D() );
				R_StudioRotate( vert.m_vecNormal, &vert.m_BoneWeights, pWorldVert->m_Normal.AsVector3D() );
				Assert( pWorldVert->m_Normal.x >= -1.05f && pWorldVert->m_Normal.x <= 1.05f );
				Assert( pWorldVert->m_Normal.y >= -1.05f && pWorldVert->m_Normal.y <= 1.05f );
				Assert( pWorldVert->m_Normal.z >= -1.05f && pWorldVert->m_Normal.z <= 1.05f );
			}

			// Don't bother to light in software when we've got vertex + pixel shaders.
			meshBuilder.Position3fv( pWorldVert->m_Position.Base() );

			if (useHWLighting)
			{
				meshBuilder.Normal3fv( pWorldVert->m_Normal.Base() );
			}
			else
			{
				R_StudioEyeballNormal( peyeball, org, pWorldVert->m_Position.AsVector3D(), pWorldVert->m_Normal.AsVector3D() );

				// This isn't really used, but since the meshbuilder checks for messed up
				// normals, let's do this here in debug mode.
				// WRONGO YOU FRIGGIN IDIOT!!!!!!!!!!
				// DX7 needs these for the flashlight.
				meshBuilder.Normal3fv( pWorldVert->m_Normal.Base() );
				R_ComputeLightAtPoint3( pWorldVert->m_Position.AsVector3D(), pWorldVert->m_Normal.AsVector3D(), color );

				unsigned char r = LinearToLightmap( color.x );
				unsigned char g = LinearToLightmap( color.y );
				unsigned char b = LinearToLightmap( color.z );

				meshBuilder.Color4ub( r, g, b, a );
			}

			meshBuilder.TexCoord2fv( 0, vert.m_vecTexCoord.Base() );

			// FIXME: For now, flexed hw-skinned meshes can only have one bone
			// The data must exist in the 0th hardware matrix
			meshBuilder.BoneWeight( 0, 1.0f );
			meshBuilder.BoneWeight( 1, 0.0f );
			meshBuilder.BoneWeight( 2, 0.0f );
			meshBuilder.BoneWeight( 3, 0.0f );
			meshBuilder.BoneMatrix( 0, 0 );
			meshBuilder.BoneMatrix( 1, 0 );
			meshBuilder.BoneMatrix( 2, 0 );
			meshBuilder.BoneMatrix( 3, 0 );
			meshBuilder.AdvanceVertex();
		}

		meshBuilder.End();
		pMesh->Draw();

		for (int k=0; k<pGroup->m_NumStrips; k++)
		{
			numTrianglesRendered += pGroup->m_pUniqueTris[k];
		}

		if ( m_pRC->m_Config.bDrawNormals || m_pRC->m_Config.bDrawTangentFrame )
		{
			pRenderContext->SetNumBoneWeights( 0 );
			pRenderContext->Bind( m_pMaterialTangentFrame );
			
			CMeshBuilder meshBuilder;
			pMesh = pRenderContext->GetDynamicMesh( false );
			meshBuilder.Begin( pMesh, MATERIAL_LINES, pGroup->m_NumVertices );

			bool doFlex = true;
			bool r_blend = false;
			R_StudioSoftwareProcessMesh_Normals( pmesh, meshBuilder, pGroup->m_NumVertices, 
				pGroup->m_pGroupIndexToMeshIndex, lighting, doFlex, r_blend, m_pRC->m_Config.bDrawNormals, m_pRC->m_Config.bDrawTangentFrame );
			meshBuilder.End( );

			pMesh->Draw();
			pRenderContext->Bind( pMaterial );
		}
	}

	return numTrianglesRendered;
}



//-----------------------------------------------------------------------------
// Draws a mesh
//-----------------------------------------------------------------------------
int CStudioRender::R_StudioDrawMesh( IMatRenderContext *pRenderContext, mstudiomesh_t* pmesh, studiomeshdata_t* pMeshData,
									 StudioModelLighting_t lighting, IMaterial *pMaterial, 
									 ColorMeshInfo_t *pColorMeshes, int lod )
{
	VPROF( "R_StudioDrawMesh" );

	int numTrianglesRendered = 0;

	// Draw all the various mesh groups...
	for ( int j = 0; j < pMeshData->m_NumGroup; ++j )
	{
		studiomeshgroup_t* pGroup = &pMeshData->m_pMeshGroup[j];

		// Older models are merely flexed while new ones are also delta flexed
		bool bIsFlexed = (pGroup->m_Flags & MESHGROUP_IS_FLEXED) != 0;
		bool bIsDeltaFlexed = (pGroup->m_Flags & MESHGROUP_IS_DELTA_FLEXED) != 0;

		// Take the static path for new flexed models on DX9 hardware
		bool bFlexStatic = ( bIsDeltaFlexed && g_pMaterialSystemHardwareConfig->SupportsStreamOffset() );

		// Use the hardware if the mesh is hw skinned and we can put flexes on another stream 
		// Otherwise, we gotta do some expensive locks
		bool bIsHardwareSkinnedData = ( pGroup->m_Flags & MESHGROUP_IS_HWSKINNED ) != 0;
		bool bShouldHardwareSkin = bIsHardwareSkinnedData && ( !bIsFlexed || bFlexStatic ) && 
			( lighting != LIGHTING_SOFTWARE );

		if ( bShouldHardwareSkin && !m_pRC->m_Config.bDrawNormals && !m_pRC->m_Config.bDrawTangentFrame && !m_pRC->m_Config.bWireframe )
		{
			if ( !m_pRC->m_Config.bNoHardware )
			{
				numTrianglesRendered += R_StudioDrawStaticMesh( pRenderContext, pmesh, pGroup, lighting, m_pRC->m_AlphaMod, pMaterial, lod, pColorMeshes );
			}
		}
		else
		{
			if ( !m_pRC->m_Config.bNoSoftware )
			{
				numTrianglesRendered += R_StudioDrawDynamicMesh( pRenderContext, pmesh, pGroup, lighting, m_pRC->m_AlphaMod, pMaterial, lod );
			}
		}
	}
	return numTrianglesRendered;
}


//-----------------------------------------------------------------------------
// Inserts translucent mesh into list
//-----------------------------------------------------------------------------
template< class T >
void InsertRenderable( int mesh, T val, int count, int* pIndices, T* pValList )
{
	// Compute insertion point...
	int i;
	for ( i = count; --i >= 0; )
	{
		if (val < pValList[i])
			break;

		// Shift down
		pIndices[i + 1] = pIndices[i];
		pValList[i+1] = pValList[i];
	}

	// Insert at insertion point
	++i;
	pValList[i] = val;
	pIndices[i] = mesh;
}


//-----------------------------------------------------------------------------
// Sorts the meshes
//-----------------------------------------------------------------------------
int CStudioRender::SortMeshes( int* pIndices, IMaterial **ppMaterials, 
	short* pskinref, Vector const& vforward, Vector const& r_origin )
{
	int numMeshes = 0;
	if (m_bDrawTranslucentSubModels)
	{
//		float* pDist = (float*)_alloca( m_pSubModel->nummeshes * sizeof(float) );

		// Sort each model piece by it's center, if it's translucent
		for (int i = 0; i < m_pSubModel->nummeshes; ++i)
		{
			// Don't add opaque materials
			mstudiomesh_t*	pmesh = m_pSubModel->pMesh(i);
			IMaterial *pMaterial = ppMaterials[pskinref[pmesh->material]];
			if( !pMaterial || !pMaterial->IsTranslucent() )
				continue;

			// FIXME: put the "center" of the mesh into delta
//			Vector delta;
//			VectorSubtract( delta, r_origin, delta );
//			float dist = DotProduct( delta, vforward );

			// Add it to our lists
//			InsertRenderable( i, dist, numMeshes, pIndices, pDist );

			// One more mesh
			++numMeshes;
		}
	}
	else
	{
		IMaterial** ppMat = (IMaterial**)_alloca( m_pSubModel->nummeshes * sizeof(IMaterial*) );

		// Sort by material type
		for (int i = 0; i < m_pSubModel->nummeshes; ++i)
		{
			mstudiomesh_t*	pmesh = m_pSubModel->pMesh(i);
			IMaterial *pMaterial = ppMaterials[pskinref[pmesh->material]];
			if( !pMaterial )
				continue;

			// Don't add translucent materials
			if (( !m_pRC->m_Config.bWireframe ) && pMaterial->IsTranslucent() )
				continue;

			// Add it to our lists
			InsertRenderable( i, pMaterial, numMeshes, pIndices, ppMat );

			// One more mesh
			++numMeshes;
		}
	}

	return numMeshes;
}

//-----------------------------------------------------------------------------
// R_StudioDrawPoints
//
// Returns the number of triangles rendered.
//-----------------------------------------------------------------------------
#pragma warning (disable:4189)
int CStudioRender::R_StudioDrawPoints( IMatRenderContext *pRenderContext, int skin, void /*IClientEntity*/ *pClientEntity, 
	IMaterial **ppMaterials, int *pMaterialFlags, int boneMask, int lod, ColorMeshInfo_t *pColorMeshes )
{
	VPROF( "R_StudioDrawPoints" );
	int			i;
	int numTrianglesRendered = 0;

#if 0 // garymcthack
	if ( m_pSubModel->numfaces == 0 )
		return 0;
#endif

	// happens when there's a model load failure
	if ( m_pStudioMeshes == 0 )
		return 0;

	if ( m_pRC->m_Config.bWireframe && m_bDrawTranslucentSubModels )
		return 0;
	
	// ConDMsg("%d: %d %d\n", pimesh->numFaces, pimesh->numVertices, pimesh->numNormals );
	if ( m_pRC->m_Config.skin )
	{
		skin = m_pRC->m_Config.skin;
		if ( skin >= m_pStudioHdr->numskinfamilies )
		{
			skin = 0;
		}
	}

	// get skinref array
	short *pskinref	= m_pStudioHdr->pSkinref( 0 );
	if ( skin > 0 && skin < m_pStudioHdr->numskinfamilies )
	{
		pskinref += ( skin * m_pStudioHdr->numskinref );
	}

	// FIXME: Activate sorting on a mesh level
//	int* pIndices = (int*)_alloca( m_pSubModel->nummeshes * sizeof(int) ); 
//	int numMeshes = SortMeshes( pIndices, ppMaterials, pskinref, vforward, r_origin );

	// draw each mesh
	for ( i = 0; i < m_pSubModel->nummeshes; ++i)
	{
		mstudiomesh_t *pmesh = m_pSubModel->pMesh(i);
		studiomeshdata_t *pMeshData = &m_pStudioMeshes[pmesh->meshid];
		Assert( pMeshData );

		if ( !pMeshData->m_NumGroup )
			continue;

		if ( !pMaterialFlags )
			continue;

		StudioModelLighting_t lighting = LIGHTING_HARDWARE;
		int materialFlags = pMaterialFlags[pskinref[pmesh->material]];

		IMaterial* pMaterial = R_StudioSetupSkinAndLighting( pRenderContext, pskinref[ pmesh->material ], ppMaterials, materialFlags, pClientEntity, pColorMeshes, lighting );
		if ( !pMaterial )
			continue;

#ifdef _DEBUG
		char const *materialName = pMaterial->GetName();
#endif
		// Set up flex data
		m_VertexCache.SetMesh( i );
		   
		// The following are special cases that can't be covered with
		// the normal static/dynamic methods due to optimization reasons
		switch ( pmesh->materialtype )
		{
		case 1:	
			// eyeballs
			numTrianglesRendered += R_StudioDrawEyeball( pRenderContext, pmesh, pMeshData, lighting, pMaterial, lod );
			break;

		default:
			numTrianglesRendered += R_StudioDrawMesh( pRenderContext, pmesh, pMeshData, lighting, pMaterial, pColorMeshes, lod );
			break;
		}
	}

	// Reset this state so it doesn't hose other parts of rendering
	pRenderContext->SetNumBoneWeights( 0 );

	return numTrianglesRendered;
}
#pragma warning (default:4189)