1HEADmaster

1 files changed, 1036 insertions, 0 deletions

diff --git a/utils/vrad/vraddetailprops.cpp b/utils/vrad/vraddetailprops.cpp
new file mode 100644
index 0000000..87d0e05
--- /dev/null
+++ b/utils/vrad/vraddetailprops.cpp
@@ -0,0 +1,1036 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Revision: $
+// $NoKeywords: $
+//
+// This file contains code to allow us to associate client data with bsp leaves.
+//
+//=============================================================================//
+
+#include "vrad.h"
+#include "Bsplib.h"
+#include "GameBSPFile.h"
+#include "UtlBuffer.h"
+#include "utlvector.h"
+#include "CModel.h"
+#include "studio.h"
+#include "pacifier.h"
+#include "vraddetailprops.h"
+#include "mathlib/halton.h"
+#include "messbuf.h"
+#include "byteswap.h"
+
+bool LoadStudioModel( char const* pModelName, CUtlBuffer& buf );
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Writes a glview text file containing the collision surface in question
+// Input  : *pCollide - 
+//			*pFilename - 
+//-----------------------------------------------------------------------------
+void DumpRayToGlView( Ray_t const& ray, float dist, Vector* pColor, const char *pFilename )
+{
+	Vector dir =  ray.m_Delta;
+	float len = VectorNormalize(dir);
+	if (len < 1e-3)
+		return;
+
+	Vector up( 0, 0, 1 );
+	Vector crossDir;
+	if (fabs(DotProduct(up, dir)) - 1.0f < -1e-3 )
+	{
+		CrossProduct( dir, up, crossDir );
+		VectorNormalize(crossDir);
+	}
+	else
+	{
+		up.Init( 0, 1, 0 );
+		CrossProduct( dir, up, crossDir );
+		VectorNormalize(crossDir);
+	}
+
+	Vector end;
+	Vector start1, start2;
+	VectorMA( ray.m_Start, dist, ray.m_Delta, end );
+	VectorMA( ray.m_Start, -2, crossDir, start1 );
+	VectorMA( ray.m_Start, 2, crossDir, start2 );
+
+	FileHandle_t fp = g_pFileSystem->Open( pFilename, "a" );
+	int vert = 0;
+	CmdLib_FPrintf( fp, "3\n" );
+	CmdLib_FPrintf( fp, "%6.3f %6.3f %6.3f %.2f %.2f %.2f\n", start1.x, start1.y, start1.z,
+		pColor->x, pColor->y, pColor->z );
+	vert++;
+	CmdLib_FPrintf( fp, "%6.3f %6.3f %6.3f %.2f %.2f %.2f\n", start2.x, start2.y, start2.z,
+		pColor->x, pColor->y, pColor->z );
+	vert++;
+	CmdLib_FPrintf( fp, "%6.3f %6.3f %6.3f %.2f %.2f %.2f\n", end.x, end.y, end.z,
+		pColor->x, pColor->y, pColor->z );
+	vert++;
+	g_pFileSystem->Close( fp );
+}
+
+
+//-----------------------------------------------------------------------------
+// This puppy is used to construct the game lumps
+//-----------------------------------------------------------------------------
+static CUtlVector<DetailPropLightstylesLump_t>	s_DetailPropLightStyleLumpLDR;
+static CUtlVector<DetailPropLightstylesLump_t>	s_DetailPropLightStyleLumpHDR;
+static CUtlVector<DetailPropLightstylesLump_t> *s_pDetailPropLightStyleLump = &s_DetailPropLightStyleLumpLDR;
+
+//-----------------------------------------------------------------------------
+// An amount to add to each model to get to the model center
+//-----------------------------------------------------------------------------
+CUtlVector<Vector> g_ModelCenterOffset;
+CUtlVector<Vector> g_SpriteCenterOffset;
+
+void VRadDetailProps_SetHDRMode( bool bHDR )
+{
+	if( bHDR )
+	{
+		s_pDetailPropLightStyleLump = &s_DetailPropLightStyleLumpHDR;
+	}
+	else
+	{
+		s_pDetailPropLightStyleLump = &s_DetailPropLightStyleLumpLDR;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Finds ambient sky lights
+//-----------------------------------------------------------------------------
+static directlight_t* FindAmbientSkyLight()
+{
+	static directlight_t *s_pCachedSkylight = NULL;
+
+	// Don't keep searching for the same light.
+	if ( !s_pCachedSkylight )
+	{
+		// find any ambient lights
+		directlight_t* dl;
+		for (dl = activelights; dl != 0; dl = dl->next)
+		{
+			if (dl->light.type == emit_skyambient)
+			{
+				s_pCachedSkylight = dl;
+				break;
+			}
+		}
+	}
+
+	return s_pCachedSkylight;
+}
+
+
+//-----------------------------------------------------------------------------
+// Compute world center of a prop
+//-----------------------------------------------------------------------------
+static void ComputeWorldCenter( DetailObjectLump_t& prop, Vector& center, Vector& normal )
+{
+	// Transform the offset into world space
+	Vector forward, right;
+	AngleVectors( prop.m_Angles, &forward, &right, &normal );
+	VectorCopy( prop.m_Origin, center );
+
+	// FIXME: Take orientation into account?
+	switch (prop.m_Type )
+	{
+	case DETAIL_PROP_TYPE_MODEL:
+		VectorMA( center, g_ModelCenterOffset[prop.m_DetailModel].x, forward, center );
+		VectorMA( center, -g_ModelCenterOffset[prop.m_DetailModel].y, right, center );
+		VectorMA( center, g_ModelCenterOffset[prop.m_DetailModel].z, normal, center );
+		break;
+
+	case DETAIL_PROP_TYPE_SPRITE:
+		Vector vecOffset;
+		VectorMultiply( g_SpriteCenterOffset[prop.m_DetailModel], prop.m_flScale, vecOffset );
+		VectorMA( center, vecOffset.x, forward, center );
+		VectorMA( center, -vecOffset.y, right, center );
+		VectorMA( center, vecOffset.z, normal, center );
+		break;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Computes max direct lighting for a single detal prop
+//-----------------------------------------------------------------------------
+static void ComputeMaxDirectLighting( DetailObjectLump_t& prop, Vector* maxcolor, int iThread )
+{
+	// The max direct lighting must be along the direction to one
+	// of the static lights....
+
+	Vector origin, normal;
+	ComputeWorldCenter( prop, origin, normal );
+
+	if ( !origin.IsValid() || !normal.IsValid() )
+	{
+		static bool s_Warned = false;
+		if ( !s_Warned )
+		{
+			Warning("WARNING: Bogus detail props encountered!\n" );
+			s_Warned = true;
+		}
+
+		// fill with debug color
+		for ( int i = 0; i < MAX_LIGHTSTYLES; ++i)
+		{
+			maxcolor[i].Init(1,0,0);
+		}
+		return;
+	}
+
+	int cluster = ClusterFromPoint(origin);
+
+	Vector delta;
+	CUtlVector< directlight_t* >	lights;
+	CUtlVector< Vector >			directions;
+
+	directlight_t* dl;
+	for (dl = activelights; dl != 0; dl = dl->next)
+	{
+		// skyambient doesn't affect dlights..
+		if (dl->light.type == emit_skyambient)
+			continue;
+
+		// is this lights cluster visible?
+		if ( PVSCheck( dl->pvs, cluster ) )
+		{
+			lights.AddToTail(dl);
+			VectorSubtract( dl->light.origin, origin, delta );
+			VectorNormalize( delta );
+			directions.AddToTail( delta );
+		}
+	}
+
+	// Find the max illumination
+	int i;
+	for ( i = 0; i < MAX_LIGHTSTYLES; ++i)
+	{
+		maxcolor[i].Init(0,0,0);
+	}
+
+	// NOTE: See version 10 for a method where we choose a normal based on whichever
+	// one produces the maximum possible illumination. This appeared to work better on
+	// e3_town, so I'm trying it now; hopefully it'll be good for all cases.
+	int j;
+	for ( j = 0; j < lights.Count(); ++j)
+	{
+		dl = lights[j];
+
+		SSE_sampleLightOutput_t out;
+		FourVectors origin4;
+		FourVectors normal4;
+		origin4.DuplicateVector( origin );
+		normal4.DuplicateVector( normal );
+
+		GatherSampleLightSSE ( out, dl, -1, origin4, &normal4, 1, iThread );
+		VectorMA( maxcolor[dl->light.style], out.m_flFalloff.m128_f32[0] * out.m_flDot[0].m128_f32[0], dl->light.intensity, maxcolor[dl->light.style] );
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Computes the ambient term from a particular surface
+//-----------------------------------------------------------------------------
+
+static void ComputeAmbientFromSurface( dface_t* pFace, directlight_t* pSkylight, 
+									   Vector& radcolor )
+{
+	texinfo_t* pTex = &texinfo[pFace->texinfo];
+	if (pTex)
+	{
+		// If we hit the sky, use the sky ambient
+		if (pTex->flags & SURF_SKY)
+		{
+			if (pSkylight)
+			{
+				// add in sky ambient
+				VectorDivide( pSkylight->light.intensity, 255.0f, radcolor ); 
+			}
+		}
+		else
+		{
+			VectorMultiply( radcolor, dtexdata[pTex->texdata].reflectivity, radcolor );
+		}
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Computes the lightmap color at a particular point
+//-----------------------------------------------------------------------------
+
+static void ComputeLightmapColorFromAverage( dface_t* pFace, directlight_t* pSkylight, float scale, Vector pColor[MAX_LIGHTSTYLES] )
+{
+	texinfo_t* pTex = &texinfo[pFace->texinfo];
+	if (pTex->flags & SURF_SKY)
+	{
+		if (pSkylight)
+		{
+			// add in sky ambient
+			Vector amb = pSkylight->light.intensity / 255.0f; 
+			pColor[0] += amb * scale;
+		}
+		return;
+	}
+
+	for (int maps = 0 ; maps < MAXLIGHTMAPS && pFace->styles[maps] != 255 ; ++maps)
+	{
+		ColorRGBExp32* pAvgColor = dface_AvgLightColor( pFace, maps );
+
+		// this code expects values from [0..1] not [0..255]
+		Vector color;
+		color[0] = TexLightToLinear( pAvgColor->r, pAvgColor->exponent );
+		color[1] = TexLightToLinear( pAvgColor->g, pAvgColor->exponent );
+		color[2] = TexLightToLinear( pAvgColor->b, pAvgColor->exponent );
+
+		ComputeAmbientFromSurface( pFace, pSkylight, color );
+
+		int style = pFace->styles[maps];
+		pColor[style] += color * scale;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Returns true if the surface has bumped lightmaps
+//-----------------------------------------------------------------------------
+
+static bool SurfHasBumpedLightmaps( dface_t *pSurf )
+{
+	bool hasBumpmap = false;
+	if( ( texinfo[pSurf->texinfo].flags & SURF_BUMPLIGHT ) && 
+		( !( texinfo[pSurf->texinfo].flags & SURF_NOLIGHT ) ) )
+	{
+		hasBumpmap = true;
+	}
+	return hasBumpmap;
+}
+
+//-----------------------------------------------------------------------------
+// Computes the lightmap color at a particular point
+//-----------------------------------------------------------------------------
+
+static void ComputeLightmapColorPointSample( dface_t* pFace, directlight_t* pSkylight, Vector2D const& luv, float scale, Vector pColor[MAX_LIGHTSTYLES] )
+{
+	// face unaffected by light
+	if (pFace->lightofs == -1 )
+		return;
+
+	int smax = ( pFace->m_LightmapTextureSizeInLuxels[0] ) + 1;
+	int tmax = ( pFace->m_LightmapTextureSizeInLuxels[1] ) + 1;
+
+	// luv is in the space of the accumulated lightmap page; we need to convert
+	// it to be in the space of the surface
+	int ds = clamp( (int)luv.x, 0, smax-1 );
+	int dt = clamp( (int)luv.y, 0, tmax-1 );
+
+	int offset = smax * tmax;
+	if ( SurfHasBumpedLightmaps( pFace ) )
+		offset *= ( NUM_BUMP_VECTS + 1 );
+
+	ColorRGBExp32* pLightmap = (ColorRGBExp32*)&pdlightdata->Base()[pFace->lightofs];
+	pLightmap += dt * smax + ds;
+	for (int maps = 0 ; maps < MAXLIGHTMAPS && pFace->styles[maps] != 255 ; ++maps)
+	{
+		int style = pFace->styles[maps];
+
+		Vector color;
+		color[0] = TexLightToLinear( pLightmap->r, pLightmap->exponent );
+		color[1] = TexLightToLinear( pLightmap->g, pLightmap->exponent );
+		color[2] = TexLightToLinear( pLightmap->b, pLightmap->exponent );
+
+		ComputeAmbientFromSurface( pFace, pSkylight, color );
+		pColor[style] += color * scale;
+
+		pLightmap += offset;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Tests a particular node
+//-----------------------------------------------------------------------------
+
+class CLightSurface : public IBSPNodeEnumerator
+{
+public:
+	CLightSurface(int iThread) : m_pSurface(0), m_HitFrac(1.0f), m_bHasLuxel(false), m_iThread(iThread) {}
+
+	// call back with a node and a context
+	bool EnumerateNode( int node, Ray_t const& ray, float f, int context )
+	{
+		dface_t* pSkySurface = 0;
+
+		// Compute the actual point
+		Vector pt;
+		VectorMA( ray.m_Start, f, ray.m_Delta, pt );
+
+		dnode_t* pNode = &dnodes[node];
+		dface_t* pFace = &g_pFaces[pNode->firstface];
+		for (int i=0 ; i < pNode->numfaces ; ++i, ++pFace)
+		{
+			// Don't take into account faces that are int a leaf
+			if ( !pFace->onNode )
+				continue;
+
+			// Don't test displacement faces
+			if ( pFace->dispinfo != -1 )
+				continue;
+
+			texinfo_t* pTex = &texinfo[pFace->texinfo];
+
+			// Don't immediately return when we hit sky; 
+			// we may actually hit another surface
+			if (pTex->flags & SURF_SKY)
+			{
+				if (TestPointAgainstSkySurface( pt, pFace ))
+				{
+					pSkySurface = pFace;
+				}
+
+				continue;
+			}
+
+			if (TestPointAgainstSurface( pt, pFace, pTex ))
+			{
+				m_HitFrac = f;
+				m_pSurface = pFace;
+				m_bHasLuxel = true;
+				return false;
+			}
+		}
+
+		// if we hit a sky surface, return it
+		m_pSurface = pSkySurface;
+		return (m_pSurface == 0);
+	}
+
+	// call back with a leaf and a context
+	virtual bool EnumerateLeaf( int leaf, Ray_t const& ray, float start, float end, int context )
+	{
+		bool hit = false;
+		dleaf_t* pLeaf = &dleafs[leaf];
+		for (int i=0 ; i < pLeaf->numleaffaces ; ++i)
+		{
+			Assert( pLeaf->firstleafface + i < numleaffaces );
+			Assert( dleaffaces[pLeaf->firstleafface + i] < numfaces );
+			dface_t* pFace = &g_pFaces[dleaffaces[pLeaf->firstleafface + i]];
+
+			// Don't test displacement faces; we need to check another list
+			if ( pFace->dispinfo != -1 )
+				continue;
+
+			// Don't take into account faces that are on a node
+			if ( pFace->onNode )
+				continue;
+
+			// Find intersection point against detail brushes
+			texinfo_t* pTex = &texinfo[pFace->texinfo];
+
+			dplane_t* pPlane = &dplanes[pFace->planenum];
+
+			// Backface cull...
+			if (DotProduct( pPlane->normal, ray.m_Delta ) > 0)
+				continue;
+
+			float startDotN = DotProduct( ray.m_Start, pPlane->normal );
+			float deltaDotN = DotProduct( ray.m_Delta, pPlane->normal );
+
+			float front = startDotN + start * deltaDotN - pPlane->dist;
+			float back = startDotN + end * deltaDotN - pPlane->dist;
+			
+			int side = front < 0;
+
+			// Blow it off if it doesn't split the plane...
+			if ( (back < 0) == side )
+				continue;
+
+			// Don't test a surface that is farther away from the closest found intersection
+			float f = front / (front-back);
+			float mid = start * (1.0f - f) + end * f;
+			if (mid >= m_HitFrac)
+				continue;
+
+			Vector pt;
+			VectorMA( ray.m_Start, mid, ray.m_Delta, pt );
+
+			if (TestPointAgainstSurface( pt, pFace, pTex ))
+			{
+				m_HitFrac = mid;
+				m_pSurface = pFace;
+				hit = true;
+				m_bHasLuxel = true;
+			}
+		}
+
+		// Now try to clip against all displacements in the leaf
+		float dist;
+		Vector2D luxelCoord;
+		dface_t *pDispFace;
+		StaticDispMgr()->ClipRayToDispInLeaf( s_DispTested[m_iThread], ray, leaf, dist, pDispFace, luxelCoord );
+		if (dist < m_HitFrac)
+		{
+			m_HitFrac = dist;
+			m_pSurface = pDispFace;
+			Vector2DCopy( luxelCoord, m_LuxelCoord );
+			hit = true;
+			m_bHasLuxel = true;
+		}
+		return !hit;
+	}
+
+	bool FindIntersection( Ray_t const& ray )
+	{
+		StaticDispMgr()->StartRayTest( s_DispTested[m_iThread] );
+		return !EnumerateNodesAlongRay( ray, this, 0 );
+	}
+
+private:
+	bool TestPointAgainstSurface( Vector const& pt, dface_t* pFace, texinfo_t* pTex )
+	{
+		// no lightmaps on this surface? punt...
+		// FIXME: should be water surface?
+		if (pTex->flags & SURF_NOLIGHT)
+			return false;	
+		
+		// See where in lightmap space our intersection point is 
+		float s, t;
+		s = DotProduct (pt.Base(), pTex->lightmapVecsLuxelsPerWorldUnits[0]) + 
+			pTex->lightmapVecsLuxelsPerWorldUnits[0][3];
+		t = DotProduct (pt.Base(), pTex->lightmapVecsLuxelsPerWorldUnits[1]) + 
+			pTex->lightmapVecsLuxelsPerWorldUnits[1][3];
+
+		// Not in the bounds of our lightmap? punt...
+		if( s < pFace->m_LightmapTextureMinsInLuxels[0] || t < pFace->m_LightmapTextureMinsInLuxels[1] )
+			return false;	
+		
+		// assuming a square lightmap (FIXME: which ain't always the case),
+		// lets see if it lies in that rectangle. If not, punt...
+		float ds = s - pFace->m_LightmapTextureMinsInLuxels[0];
+		float dt = t - pFace->m_LightmapTextureMinsInLuxels[1];
+		if( ds > pFace->m_LightmapTextureSizeInLuxels[0] || dt > pFace->m_LightmapTextureSizeInLuxels[1] )
+			return false;	
+
+		m_LuxelCoord.x = ds;
+		m_LuxelCoord.y = dt;
+
+		return true;
+	}
+
+	bool TestPointAgainstSkySurface( Vector const &pt, dface_t *pFace )
+	{
+		// Create sky face winding.
+		winding_t *pWinding = WindingFromFace( pFace, Vector( 0.0f, 0.0f, 0.0f ) );
+
+		// Test point in winding. (Since it is at the node, it is in the plane.)
+		bool bRet = PointInWinding( pt, pWinding );
+
+		FreeWinding( pWinding );
+
+		return bRet;
+	}
+
+
+public:
+	int	m_iThread;
+	dface_t* m_pSurface;
+	float	m_HitFrac;
+	Vector2D	m_LuxelCoord;
+	bool	m_bHasLuxel;
+};
+
+bool CastRayInLeaf( int iThread, const Vector &start, const Vector &end, int leafIndex, float *pFraction, Vector *pNormal )
+{
+	pFraction[0] = 1.0f;
+
+	Ray_t ray;
+	ray.Init( start, end, vec3_origin, vec3_origin );
+	CBaseTrace trace;
+	if ( TraceLeafBrushes( leafIndex, start, end, trace ) != 1.0f )
+	{
+		pFraction[0] = trace.fraction;
+		*pNormal = trace.plane.normal;
+	}
+	else
+	{
+		Assert(!trace.startsolid && !trace.allsolid);
+	}
+	StaticDispMgr()->StartRayTest( s_DispTested[iThread] );
+	// Now try to clip against all displacements in the leaf
+	float dist;
+	Vector normal;
+	StaticDispMgr()->ClipRayToDispInLeaf( s_DispTested[iThread], ray, leafIndex, dist, &normal );
+	if ( dist < pFraction[0] )
+	{
+		pFraction[0] = dist;
+		*pNormal = normal;
+	}
+	return pFraction[0] != 1.0f ? true : false;
+}
+
+//-----------------------------------------------------------------------------
+// Computes ambient lighting along a specified ray.  
+// Ray represents a cone, tanTheta is the tan of the inner cone angle
+//-----------------------------------------------------------------------------
+void CalcRayAmbientLighting( int iThread, const Vector &vStart, const Vector &vEnd, float tanTheta, Vector color[MAX_LIGHTSTYLES] )
+{
+	Ray_t ray;
+	ray.Init( vStart, vEnd, vec3_origin, vec3_origin );
+
+	directlight_t *pSkyLight = FindAmbientSkyLight();
+
+	CLightSurface surfEnum(iThread);
+	if (!surfEnum.FindIntersection( ray ))
+		return;
+
+	// compute the approximate radius of a circle centered around the intersection point
+	float dist = ray.m_Delta.Length() * tanTheta * surfEnum.m_HitFrac;
+
+	// until 20" we use the point sample, then blend in the average until we're covering 40"
+	// This is attempting to model the ray as a cone - in the ideal case we'd simply sample all
+	// luxels in the intersection of the cone with the surface.  Since we don't have surface 
+	// neighbor information computed we'll just approximate that sampling with a blend between
+	// a point sample and the face average.
+	// This yields results that are similar in that aliasing is reduced at distance while 
+	// point samples provide accuracy for intersections with near geometry
+	float scaleAvg = RemapValClamped( dist, 20, 40, 0.0f, 1.0f );
+
+	if ( !surfEnum.m_bHasLuxel )
+	{
+		// don't have luxel UV, so just use average sample
+		scaleAvg = 1.0;
+	}
+	float scaleSample = 1.0f - scaleAvg;
+
+	if (scaleAvg != 0)
+	{
+		ComputeLightmapColorFromAverage( surfEnum.m_pSurface, pSkyLight, scaleAvg, color );
+	}
+	if (scaleSample != 0)
+	{
+		ComputeLightmapColorPointSample( surfEnum.m_pSurface, pSkyLight, surfEnum.m_LuxelCoord, scaleSample, color );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Compute ambient lighting component at specified position.
+//-----------------------------------------------------------------------------
+static void ComputeAmbientLightingAtPoint( int iThread, const Vector &origin, Vector radcolor[NUMVERTEXNORMALS], Vector color[MAX_LIGHTSTYLES] )
+{
+	// NOTE: I'm not dealing with shadow-casting static props here
+	// This is for speed, although we can add it if it turns out to
+	// be important
+
+	// sample world by casting N rays distributed across a sphere
+	Vector upend;
+
+	int j;
+	for ( j = 0; j < MAX_LIGHTSTYLES; ++j)
+	{
+		color[j].Init( 0,0,0 );
+	}
+
+	float tanTheta = tan(VERTEXNORMAL_CONE_INNER_ANGLE);
+	for (int i = 0; i < NUMVERTEXNORMALS; i++)
+	{
+		VectorMA( origin, COORD_EXTENT * 1.74, g_anorms[i], upend );
+
+		// Now that we've got a ray, see what surface we've hit
+		CalcRayAmbientLighting( iThread, origin, upend, tanTheta, color );
+
+//		DumpRayToGlView( ray, surfEnum.m_HitFrac, &color[0], "test.out" );
+	}
+
+	for ( j = 0; j < MAX_LIGHTSTYLES; ++j)
+	{
+		VectorMultiply( color[j], 255.0f / (float)NUMVERTEXNORMALS, color[j] );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Trace hemispherical rays from a vertex, accumulating indirect
+// sources at each ray termination.
+//-----------------------------------------------------------------------------
+void ComputeIndirectLightingAtPoint( Vector &position, Vector &normal, Vector &outColor,
+									 int iThread, bool force_fast, bool bIgnoreNormals )
+{
+	Ray_t			ray;
+	CLightSurface	surfEnum(iThread);
+
+	outColor.Init();
+
+	
+	int nSamples = NUMVERTEXNORMALS;
+	if ( do_fast || force_fast )
+		nSamples /= 4;
+	else
+		nSamples *= g_flSkySampleScale;
+
+	float totalDot = 0;
+	DirectionalSampler_t sampler;
+	for (int j = 0; j < nSamples; j++)
+	{
+		Vector samplingNormal = sampler.NextValue();
+		float dot;
+
+		if ( bIgnoreNormals )
+			dot = (0.7071/2);
+		else
+			dot = DotProduct( normal, samplingNormal );
+
+		if ( dot <= EQUAL_EPSILON )
+		{
+			// reject angles behind our plane
+			continue;
+		}
+
+		totalDot += dot;
+
+		// trace to determine surface
+		Vector vEnd;
+		VectorScale( samplingNormal, MAX_TRACE_LENGTH, vEnd );
+		VectorAdd( position, vEnd, vEnd );
+
+		ray.Init( position, vEnd, vec3_origin, vec3_origin );
+		if ( !surfEnum.FindIntersection( ray ) )
+			continue;
+
+		// get color from surface lightmap
+		texinfo_t* pTex = &texinfo[surfEnum.m_pSurface->texinfo];
+		if ( !pTex || pTex->flags & SURF_SKY )
+		{
+			// ignore contribution from sky
+			// sky ambient already accounted for during direct pass
+			continue;
+		}
+
+		if ( surfEnum.m_pSurface->styles[0] == 255 || surfEnum.m_pSurface->lightofs < 0 )
+		{
+			// no light affects this face
+			continue;
+		}
+
+
+		Vector lightmapColor;
+		if ( !surfEnum.m_bHasLuxel )
+		{
+			ColorRGBExp32* pAvgLightmapColor = dface_AvgLightColor( surfEnum.m_pSurface, 0 );
+			ColorRGBExp32ToVector( *pAvgLightmapColor, lightmapColor );
+		}
+		else
+		{
+			// get color from displacement
+			int smax = ( surfEnum.m_pSurface->m_LightmapTextureSizeInLuxels[0] ) + 1;
+			int tmax = ( surfEnum.m_pSurface->m_LightmapTextureSizeInLuxels[1] ) + 1;
+
+			// luxelcoord is in the space of the accumulated lightmap page; we need to convert
+			// it to be in the space of the surface
+			int ds = clamp( (int)surfEnum.m_LuxelCoord.x, 0, smax-1 );
+			int dt = clamp( (int)surfEnum.m_LuxelCoord.y, 0, tmax-1 );
+
+			ColorRGBExp32* pLightmap = (ColorRGBExp32*)&(*pdlightdata)[surfEnum.m_pSurface->lightofs];
+			pLightmap += dt * smax + ds;
+			ColorRGBExp32ToVector( *pLightmap, lightmapColor );
+		}
+
+		float invLengthSqr = 1.0f / (1.0f + ((vEnd - position) * surfEnum.m_HitFrac / 128.0).LengthSqr());
+		// Include falloff using invsqrlaw.
+		VectorMultiply( lightmapColor, invLengthSqr * dtexdata[pTex->texdata].reflectivity, lightmapColor );
+		VectorAdd( outColor, lightmapColor, outColor );
+	}
+
+	if ( totalDot )
+	{
+		VectorScale( outColor, 1.0f/totalDot, outColor );
+	}
+}
+
+static void ComputeAmbientLighting( int iThread, DetailObjectLump_t& prop, Vector color[MAX_LIGHTSTYLES] )
+{
+	Vector origin, normal;
+	ComputeWorldCenter( prop, origin, normal );
+
+	if ( !origin.IsValid() || !normal.IsValid() )
+	{
+		static bool s_Warned = false;
+		if ( !s_Warned )
+		{
+			Warning("WARNING: Bogus detail props encountered!\n" );
+			s_Warned = true;
+		}
+
+		// fill with debug color
+		for ( int i = 0; i < MAX_LIGHTSTYLES; ++i)
+		{
+			color[i].Init(1,0,0);
+		}
+		return;
+	}
+
+	Vector radcolor[NUMVERTEXNORMALS];
+	ComputeAmbientLightingAtPoint( iThread, origin, radcolor, color );
+}
+
+
+//-----------------------------------------------------------------------------
+// Computes lighting for a single detal prop
+//-----------------------------------------------------------------------------
+
+static void ComputeLighting( DetailObjectLump_t& prop, int iThread )
+{
+	// We're going to take the maximum of the ambient lighting and 
+	// the strongest directional light. This works because we're assuming
+	// the props will have built-in faked lighting.
+
+	Vector directColor[MAX_LIGHTSTYLES];
+	Vector ambColor[MAX_LIGHTSTYLES];
+
+	// Get the max influence of all direct lights
+	ComputeMaxDirectLighting( prop, directColor, iThread );
+
+	// Get the ambient lighting + lightstyles	  
+	ComputeAmbientLighting( iThread, prop, ambColor );
+
+	// Base lighting
+	Vector totalColor;
+	VectorAdd( directColor[0], ambColor[0], totalColor );
+	VectorToColorRGBExp32( totalColor, prop.m_Lighting );
+
+	bool hasLightstyles = false;
+	prop.m_LightStyleCount = 0;
+	
+	// lightstyles
+	for (int i = 1; i < MAX_LIGHTSTYLES; ++i )
+	{
+		VectorAdd( directColor[i], ambColor[i], totalColor );
+		totalColor *= 0.5f;
+
+		if ((totalColor[0] != 0.0f) || (totalColor[1] != 0.0f) ||
+			(totalColor[2] != 0.0f) )
+		{
+			if (!hasLightstyles)
+			{
+				prop.m_LightStyles = s_pDetailPropLightStyleLump->Size();
+				hasLightstyles = true;
+			}
+
+			int j = s_pDetailPropLightStyleLump->AddToTail();
+			VectorToColorRGBExp32( totalColor, (*s_pDetailPropLightStyleLump)[j].m_Lighting );
+			(*s_pDetailPropLightStyleLump)[j].m_Style = i;
+			++prop.m_LightStyleCount;
+		}
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Unserialization
+//-----------------------------------------------------------------------------
+static void UnserializeModelDict( CUtlBuffer& buf )
+{
+	// Get origin offset for each model...
+	int count = buf.GetInt();
+	while ( --count >= 0 )
+	{
+		DetailObjectDictLump_t lump;
+		buf.Get( &lump, sizeof(DetailObjectDictLump_t) );
+		
+		int i = g_ModelCenterOffset.AddToTail();
+
+		CUtlBuffer mdlbuf;
+		if (LoadStudioModel( lump.m_Name, mdlbuf ))
+		{
+			studiohdr_t* pHdr = (studiohdr_t*)mdlbuf.Base();
+			VectorAdd( pHdr->hull_min, pHdr->hull_max, g_ModelCenterOffset[i] );
+			g_ModelCenterOffset[i] *= 0.5f;
+		}
+		else
+		{
+			g_ModelCenterOffset[i].Init(0,0,0);
+		}
+	}
+}
+
+static void UnserializeSpriteDict( CUtlBuffer& buf )
+{
+	// Get origin offset for each model...
+	int count = buf.GetInt();
+	while ( --count >= 0 )
+	{
+		DetailSpriteDictLump_t lump;
+		buf.Get( &lump, sizeof(DetailSpriteDictLump_t) );
+		
+		// For these sprites, x goes out the front, y right, z up
+		int i = g_SpriteCenterOffset.AddToTail();
+		g_SpriteCenterOffset[i].x = 0.0f;
+		g_SpriteCenterOffset[i].y = lump.m_LR.x + lump.m_UL.x;
+		g_SpriteCenterOffset[i].z = lump.m_LR.y + lump.m_UL.y;
+		g_SpriteCenterOffset[i] *= 0.5f;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Unserializes the detail props
+//-----------------------------------------------------------------------------
+static int UnserializeDetailProps( DetailObjectLump_t*& pProps )
+{
+	GameLumpHandle_t handle = g_GameLumps.GetGameLumpHandle( GAMELUMP_DETAIL_PROPS );
+
+	if (g_GameLumps.GetGameLumpVersion(handle) != GAMELUMP_DETAIL_PROPS_VERSION)
+		return 0;
+
+	// Unserialize
+	CUtlBuffer buf( g_GameLumps.GetGameLump(handle), g_GameLumps.GameLumpSize( handle ), CUtlBuffer::READ_ONLY );
+
+	UnserializeModelDict( buf );
+	UnserializeSpriteDict( buf );
+
+	// Now we're pointing to the detail prop data
+	// This actually works because the scope of the game lump data
+	// is global and the buf was just pointing to it.
+	int count = buf.GetInt();
+	if (count)
+	{
+		pProps = (DetailObjectLump_t*)buf.PeekGet();
+	}
+	else
+	{
+		pProps = 0;
+	}
+	return count;
+}
+
+
+//-----------------------------------------------------------------------------
+// Writes the detail lighting lump
+//-----------------------------------------------------------------------------
+static void WriteDetailLightingLump( int lumpID, int lumpVersion, CUtlVector<DetailPropLightstylesLump_t> &lumpData )
+{
+	GameLumpHandle_t handle = g_GameLumps.GetGameLumpHandle(lumpID);
+	if (handle != g_GameLumps.InvalidGameLump())
+		g_GameLumps.DestroyGameLump(handle);
+	int lightsize = lumpData.Size() * sizeof(DetailPropLightstylesLump_t);
+	int lumpsize = lightsize + sizeof(int);
+
+	handle = g_GameLumps.CreateGameLump( lumpID, lumpsize, 0, lumpVersion );
+
+	// Serialize the data
+	CUtlBuffer buf( g_GameLumps.GetGameLump(handle), lumpsize );
+	buf.PutInt( lumpData.Size() );
+	if (lightsize)
+		buf.Put( lumpData.Base(), lightsize );
+}
+
+static void WriteDetailLightingLumps( void )
+{
+	WriteDetailLightingLump( GAMELUMP_DETAIL_PROP_LIGHTING, GAMELUMP_DETAIL_PROP_LIGHTING_VERSION, s_DetailPropLightStyleLumpLDR );
+	WriteDetailLightingLump( GAMELUMP_DETAIL_PROP_LIGHTING_HDR, GAMELUMP_DETAIL_PROP_LIGHTING_HDR_VERSION, s_DetailPropLightStyleLumpHDR );
+}
+
+// need to do this so that if we are building HDR data, the LDR data is intact, and vice versa.s
+void UnserializeDetailPropLighting( int lumpID, int lumpVersion, CUtlVector<DetailPropLightstylesLump_t> &lumpData )
+{
+	GameLumpHandle_t handle = g_GameLumps.GetGameLumpHandle( lumpID );
+
+	if( handle == g_GameLumps.InvalidGameLump() )
+	{
+		return;
+	}
+
+	if (g_GameLumps.GetGameLumpVersion(handle) != lumpVersion)
+		return;
+
+	// Unserialize
+	CUtlBuffer buf( g_GameLumps.GetGameLump(handle), g_GameLumps.GameLumpSize( handle ), CUtlBuffer::READ_ONLY );
+
+	int count = buf.GetInt();
+	if( !count )
+	{
+		return;
+	}
+	lumpData.SetCount( count );
+	int lightsize = lumpData.Size() * sizeof(DetailPropLightstylesLump_t);
+	buf.Get( lumpData.Base(), lightsize );
+}
+
+DetailObjectLump_t *g_pMPIDetailProps = NULL;
+
+void VMPI_ProcessDetailPropWU( int iThread, int iWorkUnit, MessageBuffer *pBuf )
+{
+	CUtlVector<DetailPropLightstylesLump_t> *pDetailPropLump = s_pDetailPropLightStyleLump;
+
+	DetailObjectLump_t& prop = g_pMPIDetailProps[iWorkUnit];
+	ComputeLighting( prop, iThread );
+
+	// Send the results back...	
+	pBuf->write( &prop.m_Lighting, sizeof( prop.m_Lighting ) );
+	pBuf->write( &prop.m_LightStyleCount, sizeof( prop.m_LightStyleCount ) );
+	pBuf->write( &prop.m_LightStyles, sizeof( prop.m_LightStyles ) );
+	
+	for ( int i=0; i < prop.m_LightStyleCount; i++ )
+	{
+		DetailPropLightstylesLump_t *l = &pDetailPropLump->Element( i + prop.m_LightStyles );
+		pBuf->write( &l->m_Lighting, sizeof( l->m_Lighting ) );
+		pBuf->write( &l->m_Style, sizeof( l->m_Style ) );
+	}
+}
+
+
+void VMPI_ReceiveDetailPropWU( int iWorkUnit, MessageBuffer *pBuf, int iWorker )
+{
+	CUtlVector<DetailPropLightstylesLump_t> *pDetailPropLump = s_pDetailPropLightStyleLump;
+
+	DetailObjectLump_t& prop = g_pMPIDetailProps[iWorkUnit];
+
+	pBuf->read( &prop.m_Lighting, sizeof( prop.m_Lighting ) );
+	pBuf->read( &prop.m_LightStyleCount, sizeof( prop.m_LightStyleCount ) );
+	pBuf->read( &prop.m_LightStyles, sizeof( prop.m_LightStyles ) );
+	
+	pDetailPropLump->EnsureCount( prop.m_LightStyles + prop.m_LightStyleCount );
+	
+	for ( int i=0; i < prop.m_LightStyleCount; i++ )
+	{
+		DetailPropLightstylesLump_t *l = &pDetailPropLump->Element( i + prop.m_LightStyles );
+		pBuf->read( &l->m_Lighting, sizeof( l->m_Lighting ) );
+		pBuf->read( &l->m_Style, sizeof( l->m_Style ) );
+	}
+}
+	
+//-----------------------------------------------------------------------------
+// Computes lighting for the detail props
+//-----------------------------------------------------------------------------
+void ComputeDetailPropLighting( int iThread )
+{
+	// illuminate them all
+	DetailObjectLump_t* pProps;
+	int count = UnserializeDetailProps( pProps );
+	if (!count)
+		return;
+
+	// unserialize the lump that we aren't computing.
+	if( g_bHDR )
+	{
+		UnserializeDetailPropLighting( GAMELUMP_DETAIL_PROP_LIGHTING, GAMELUMP_DETAIL_PROP_LIGHTING_VERSION, s_DetailPropLightStyleLumpLDR );
+	}
+	else
+	{
+		UnserializeDetailPropLighting( GAMELUMP_DETAIL_PROP_LIGHTING_HDR, GAMELUMP_DETAIL_PROP_LIGHTING_HDR_VERSION, s_DetailPropLightStyleLumpHDR );
+	}
+
+	StartPacifier("Computing detail prop lighting : ");
+
+	for (int i = 0; i < count; ++i)
+	{
+		UpdatePacifier( (float)i / (float)count );
+		ComputeLighting( pProps[i], iThread );
+	}
+
+	// Write detail prop lightstyle lump...
+	WriteDetailLightingLumps();
+	EndPacifier( true );
+}