void ComputePerLeafAmbientLighting()
{
// Figure out which lights should go in the per-leaf ambient cubes.
int nInAmbientCube = 0;
int nSurfaceLights = 0;
for ( int i=0; i < *pNumworldlights; i++ )
{
dworldlight_t *wl = &dworldlights[i];
if ( IsLeafAmbientSurfaceLight( wl ) )
wl->flags |= DWL_FLAGS_INAMBIENTCUBE;
else
wl->flags &= ~DWL_FLAGS_INAMBIENTCUBE;
if ( wl->type == emit_surface )
++nSurfaceLights;
if ( wl->flags & DWL_FLAGS_INAMBIENTCUBE )
++nInAmbientCube;
}
Msg( "%d of %d (%d%% of) surface lights went in leaf ambient cubes.\n", nInAmbientCube, nSurfaceLights, nSurfaceLights ? ((nInAmbientCube*100) / nSurfaceLights) : 0 );
g_pLeafAmbientLighting->SetCount( numleafs );
StartPacifier( "ComputePerLeafAmbientLighting: " );
for ( int leafID = 0; leafID < numleafs; leafID++ )
{
dleaf_t *pLeaf = &dleafs[leafID];
Vector cube[6];
Vector center = ( Vector( pLeaf->mins[0], pLeaf->mins[1], pLeaf->mins[2] ) + Vector( pLeaf->maxs[0], pLeaf->maxs[1], pLeaf->maxs[2] ) ) * 0.5f;
#if MAKE_LIGHT_BELOW_WATER_MATCH_LIGHT_ABOVE_WATER
if (pLeaf->contents & CONTENTS_WATER)
{
center.z=pLeaf->maxs[2]+1;
int above_leaf=PointLeafnum( center);
dleaf_t *pLeaf = &dleafs[above_leaf];
center = ( Vector( pLeaf->mins[0], pLeaf->mins[1], pLeaf->mins[2] ) + Vector( pLeaf->maxs[0], pLeaf->maxs[1], pLeaf->maxs[2] ) ) * 0.5f;
}
#endif
ComputeAmbientFromSphericalSamples( center, cube );
for ( int i = 0; i < 6; i++ )
{
VectorToColorRGBExp32( cube[i], (*g_pLeafAmbientLighting)[leafID].m_Color[i] );
}
UpdatePacifier( (float)leafID / numleafs );
}
EndPacifier( true );
}
void ComputePerLeafAmbientLighting()
{
// Figure out which lights should go in the per-leaf ambient cubes.
int nInAmbientCube = 0;
int nSurfaceLights = 0;
for ( int i=0; i < *pNumworldlights; i++ )
{
dworldlight_t *wl = &dworldlights[i];
if ( IsLeafAmbientSurfaceLight( wl ) )
wl->flags |= DWL_FLAGS_INAMBIENTCUBE;
else
wl->flags &= ~DWL_FLAGS_INAMBIENTCUBE;
if ( wl->type == emit_surface )
++nSurfaceLights;
if ( wl->flags & DWL_FLAGS_INAMBIENTCUBE )
++nInAmbientCube;
}
Msg( "%d of %d (%d%% of) surface lights went in leaf ambient cubes.\n", nInAmbientCube, nSurfaceLights, nSurfaceLights ? ((nInAmbientCube*100) / nSurfaceLights) : 0 );
g_LeafAmbientSamples.SetCount(numleafs);
if ( g_bUseMPI )
{
// Distribute the work among the workers.
VMPI_SetCurrentStage( "ComputeLeafAmbientLighting" );
DistributeWork( numleafs, VMPI_DISTRIBUTEWORK_PACKETID, VMPI_ProcessLeafAmbient, VMPI_ReceiveLeafAmbientResults );
}
else
{
RunThreadsOn(numleafs, true, ThreadComputeLeafAmbient);
}
// now write out the data
Msg("Writing leaf ambient...");
g_pLeafAmbientIndex->RemoveAll();
g_pLeafAmbientLighting->RemoveAll();
g_pLeafAmbientIndex->SetCount( numleafs );
g_pLeafAmbientLighting->EnsureCapacity( numleafs*4 );
for ( int leafID = 0; leafID < numleafs; leafID++ )
{
const CUtlVector<ambientsample_t> &list = g_LeafAmbientSamples[leafID];
g_pLeafAmbientIndex->Element(leafID).ambientSampleCount = list.Count();
if ( !list.Count() )
{
g_pLeafAmbientIndex->Element(leafID).firstAmbientSample = 0;
}
else
{
g_pLeafAmbientIndex->Element(leafID).firstAmbientSample = g_pLeafAmbientLighting->Count();
// compute the samples in disk format. Encode the positions in 8-bits using leaf bounds fractions
for ( int i = 0; i < list.Count(); i++ )
{
int outIndex = g_pLeafAmbientLighting->AddToTail();
dleafambientlighting_t &light = g_pLeafAmbientLighting->Element(outIndex);
light.x = Fixed8Fraction( list[i].pos.x, dleafs[leafID].mins[0], dleafs[leafID].maxs[0] );
light.y = Fixed8Fraction( list[i].pos.y, dleafs[leafID].mins[1], dleafs[leafID].maxs[1] );
light.z = Fixed8Fraction( list[i].pos.z, dleafs[leafID].mins[2], dleafs[leafID].maxs[2] );
light.pad = 0;
for ( int side = 0; side < 6; side++ )
{
VectorToColorRGBExp32( list[i].cube[side], light.cube.m_Color[side] );
}
}
}
}
for ( int i = 0; i < numleafs; i++ )
{
// UNDONE: Do this dynamically in the engine instead. This will allow us to sample across leaf
// boundaries always which should improve the quality of lighting in general
if ( g_pLeafAmbientIndex->Element(i).ambientSampleCount == 0 )
{
if ( !(dleafs[i].contents & CONTENTS_SOLID) )
{
Msg("Bad leaf ambient for leaf %d\n", i );
}
int refLeaf = NearestNeighborWithLight(i);
g_pLeafAmbientIndex->Element(i).ambientSampleCount = 0;
g_pLeafAmbientIndex->Element(i).firstAmbientSample = refLeaf;
}
}
Msg("done\n");
}
