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;
}
}
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;
}
}
void ColorRGBExp32ToVector( const ColorRGBExp32& in, Vector& out )
{
Assert( s_bMathlibInitialized );
// FIXME: Why is there a factor of 255 built into this?
out.x = 255.0f * TexLightToLinear( in.r, in.exponent );
out.y = 255.0f * TexLightToLinear( in.g, in.exponent );
out.z = 255.0f * TexLightToLinear( in.b, in.exponent );
}
//-----------------------------------------------------------------------------
// Computes the lightmap color at a particular point
//-----------------------------------------------------------------------------
static void ComputeLightmapColorFromAverage( msurfacelighting_t *pLighting, bool bUseLightStyles, Vector& c )
{
int nMaxMaps = bUseLightStyles ? MAXLIGHTMAPS : 1;
for (int maps = 0 ; maps < nMaxMaps && pLighting->m_nStyles[maps] != 255 ; ++maps)
{
float scale = LightStyleValue( pLighting->m_nStyles[maps] );
ColorRGBExp32* pAvgColor = pLighting->AvgLightColor(maps);
c[0] += TexLightToLinear( pAvgColor->r, pAvgColor->exponent ) * scale;
c[1] += TexLightToLinear( pAvgColor->g, pAvgColor->exponent ) * scale;
c[2] += TexLightToLinear( pAvgColor->b, pAvgColor->exponent ) * scale;
}
}
//-----------------------------------------------------------------------------
// Computes the lightmap color at a particular point
//-----------------------------------------------------------------------------
static void ComputeLightmapColor( SurfaceHandle_t surfID, int ds, int dt, bool bUseLightStyles, Vector& c )
{
msurfacelighting_t *pLighting = SurfaceLighting( surfID );
ColorRGBExp32* pLightmap = pLighting->m_pSamples;
if( !pLightmap )
{
static int messagecount = 0;
if ( ++messagecount < 10 )
{
// Stop spamming. I heard you already!!!
ConMsg( "hit surface has no samples\n" );
}
return;
}
int smax = ( pLighting->m_LightmapExtents[0] ) + 1;
int tmax = ( pLighting->m_LightmapExtents[1] ) + 1;
int offset = smax * tmax;
if ( SurfHasBumpedLightmaps( surfID ) )
{
offset *= ( NUM_BUMP_VECTS + 1 );
}
pLightmap += dt * smax + ds;
int nMaxMaps = bUseLightStyles ? MAXLIGHTMAPS : 1;
for (int maps = 0 ; maps < nMaxMaps && pLighting->m_nStyles[maps] != 255 ; ++maps)
{
float scale = LightStyleValue( pLighting->m_nStyles[maps] );
c[0] += TexLightToLinear( pLightmap->r, pLightmap->exponent ) * scale;
c[1] += TexLightToLinear( pLightmap->g, pLightmap->exponent ) * scale;
c[2] += TexLightToLinear( pLightmap->b, pLightmap->exponent ) * scale;
// Check version 32 in source safe for some debugging crap
pLightmap += offset;
}
}