protected override Color3 Indirect( Point WorldHit, Point ModelHit,
Vector WorldViewer, Vector ModelViewer,
SurfaceNormal Normal,
Random Rng, RayTracerBase Tracer )
{
if ( Tracer == null )
{
return Color3.Black;
}
Vector ReverseViewer = -WorldViewer;
Vector WorldNormal = Normal.WorldNormal;
BrdfSample Sample = brdf.Sample( ReverseViewer, WorldNormal, Rng );
if ( Sample.Reflectance.IsBlack() || Sample.Pdf <= 0.0f )
{
return Color3.Black;
}
Color3 Reflectance = Sample.Reflectance * Math.Abs( Vector.DotProduct( Sample.Outgoing, WorldNormal ) ) / Sample.Pdf;
float RouletteProbability = Math.Max( Math.Max( Sample.Reflectance.R, Sample.Reflectance.G ), Sample.Reflectance.B );
return Reflectance * Tracer.Trace( new Ray( WorldHit, Sample.Outgoing ), RouletteProbability );
}
protected override Color3 Indirect( Point WorldHit, Point ModelHit,
Vector WorldViewer, Vector ModelViewer,
SurfaceNormal Normal,
Random Rng, RayTracerBase Tracer )
{
if ( Tracer == null || Specular.IsBlack() )
{
return Color3.Black;
}
Vector ReflectedDirection = IrisMath.Reflect( WorldViewer, Normal.NormalizedWorldNormal );
return Specular * Tracer.Trace( new Ray( WorldHit, ReflectedDirection ) );
}
protected override Color3 Indirect( Point WorldHit, Point ModelHit,
Vector WorldViewer, Vector ModelViewer,
SurfaceNormal Normal,
Random Rng, RayTracerBase Tracer )
{
if ( Tracer == null || Color.IsBlack() )
{
return Color3.Black;
}
Vector Direction = IrisMath.CosineSampleHemisphere( Normal.NormalizedWorldNormal, Rng );
return Color * Tracer.Trace( new Ray( WorldHit, Direction ), RouletteProbability );
}