public void ComputeScatteringFunctions(SurfaceInteraction si,
IObjectArena arena,
TransportMode mode,
bool allowMultipleLobes)
{
var s1 = Scale.Evaluate(in si).Clamp();
var s2 = (Spectrum.One - s1).Clamp();
M1.ComputeScatteringFunctions(si, arena, mode, allowMultipleLobes);
var si2 = arena.Create <SurfaceInteraction>().Initialize(in si);
M2.ComputeScatteringFunctions(si2, arena, mode, allowMultipleLobes);
var n1 = si.BSDF.NumberOfComponents();
var n2 = si2.BSDF.NumberOfComponents();
for (var i = 0; i < n1; ++i)
{
var collection = (IBxDFCollection)si.BSDF;
var bxdf = arena.Create <ScaledBxDF>().Initialize(collection[i], s1);
collection.Set(bxdf, i);
}
for (var i = 0; i < n2; ++i)
{
var collection = (IBxDFCollection)si2.BSDF;
var bxdf = arena.Create <ScaledBxDF>().Initialize(collection[i], s2);
collection.Set(bxdf, i);
}
}
