public virtual RgbColor StartFromEmitter(EmitterSample emitterSample, RgbColor initialWeight)
{
isOnLightSubpath = true;
Ray ray = Raytracer.SpawnRay(emitterSample.Point, emitterSample.Direction);
return(ContinueWalk(ray, emitterSample.Point, emitterSample.Pdf, initialWeight, 1));
}
public override RgbColor StartFromEmitter(EmitterSample emitterSample, RgbColor initialWeight)
{
nextReversePdf = 0.0f;
// Add the vertex on the light source
lastId = cache.AddVertex(new PathVertex {
// TODO are any of these actually useful? Only the point right now, but only because we do not pre-compute
// the next event weight (which would be more efficient to begin with)
Point = emitterSample.Point,
PdfFromAncestor = 0.0f, // unused
PdfReverseAncestor = 0.0f, // unused
Weight = RgbColor.Black, // the first known weight is that at the first hit point
AncestorId = -1,
Depth = 0
}, pathIdx);
return(base.StartFromEmitter(emitterSample, initialWeight));
}
