/// <summary>
/// Caches a face group and calculates texture lighting coordinates.
/// </summary>
protected int CacheLightGeometry( TextureLight light, BufferBase pIndexesBuf, BufferBase pTexLightMapsBuf,
BufferBase pVerticesBuf, BspStaticFaceGroup faceGroup )
{
#if !AXIOM_SAFE_ONLY
unsafe
#endif
{
// Skip sky always
if ( faceGroup.isSky )
{
return 0;
}
int idxStart = 0;
int numIdx = 0;
int vertexStart = 0;
if ( faceGroup.type == FaceGroup.FaceList )
{
idxStart = faceGroup.elementStart;
numIdx = faceGroup.numElements;
vertexStart = faceGroup.vertexStart;
}
else if ( faceGroup.type == FaceGroup.Patch )
{
idxStart = faceGroup.patchSurf.IndexOffset;
numIdx = faceGroup.patchSurf.CurrentIndexCount;
vertexStart = faceGroup.patchSurf.VertexOffset;
}
else
{
// Unsupported face type
return 0;
}
var idxSize = this.level.Indexes.IndexSize;
var idxSrc = this.level.Indexes.Lock( idxStart*idxSize, numIdx*idxSize, BufferLocking.ReadOnly );
#if SILVERLIGHT
var src = idxSrc.ToUShortPointer();
#else
var src = idxSrc.ToUIntPointer();
#endif
int maxIndex = 0;
for ( int i = 0; i < numIdx; i++ )
{
var index = (int)src[ i ];
if ( index > maxIndex )
{
maxIndex = index;
}
}
var vertexPos = new Vector3[maxIndex + 1];
var vertexIsStored = new bool[maxIndex + 1];
for ( int i = 0; i < numIdx; i++ )
{
var index = (int)src[ i ];
var pVertices = pVerticesBuf.ToBspVertexPointer();
if ( !vertexIsStored[ index ] )
{
vertexPos[ index ] = pVertices[ vertexStart + index ].position;
vertexIsStored[ index ] = true;
}
pVerticesBuf.UnPin();
}
Vector2[] texCoors;
ColorEx[] colors;
bool res = light.CalculateTexCoordsAndColors( faceGroup.plane, vertexPos, out texCoors, out colors );
if ( res )
{
var pTexLightMaps = pTexLightMapsBuf.ToTextureLightMapPointer();
for ( int i = 0; i <= maxIndex; i++ )
{
pTexLightMaps[ vertexStart + i ] = new TextureLightMap
{
color = Root.Instance.RenderSystem.ConvertColor( colors[ i ] ),
textureLightMap = texCoors[ i ]
};
}
pTexLightMapsBuf.UnPin();
// Offset the indexes here
// we have to do this now rather than up-front because the
// indexes are sometimes reused to address different vertex chunks
if ( this.level.Indexes.Type == IndexType.Size16 )
{
var pIndexes = pIndexesBuf.ToUShortPointer();
for ( int i = 0; i < numIdx; i++ )
{
pIndexes[ i ] = (ushort)( src[ i ] + vertexStart );
}
}
else
{
var pIndexes = pIndexesBuf.ToUIntPointer();
for ( int i = 0; i < numIdx; i++ )
{
pIndexes[ i ] = (uint)( src[ i ] + vertexStart );
}
}
this.level.Indexes.Unlock();
// return number of elements
return numIdx;
}
else
{
this.level.Indexes.Unlock();
return 0;
}
}
}