public override Vec3 PathShade(ShadeRec sr)
{
Vec3 L = new Vec3();
Vec3 wo = sr.Ray.D * -1;
Vec3 wiDiff = null;
Vec3 wiSpec = null;
float pdfDiff = 0.0f;
float pdfSpec = 0.0f;
Vec3 Ldiff = diffuse.SampleF(sr, ref wiDiff, wo, ref pdfDiff);
Vec3 Lspec = specular.SampleF(sr, ref wiSpec, wo, ref pdfSpec);
double ndotwiDiff = sr.Normal.Dot(wiDiff);
double ndotwiSpec = sr.Normal.Dot(wiSpec);
Ray diffRay = new Ray(sr.HitPoint, wiDiff);
Ray specRay = new Ray(sr.HitPoint, wiSpec);
Ldiff *= sr.World.Tracer.TraceRay(diffRay, sr.Depth + 1)
* ndotwiDiff / pdfDiff;
Lspec *= sr.World.Tracer.TraceRay(specRay, sr.Depth + 1)
* ndotwiSpec / pdfSpec;
L += Ldiff + Lspec;
return(L);
}
public override Vec3 Shade(ShadeRec sr)
{
Vec3 L = base.Shade(sr);
Vec3 wo = sr.Ray.D * -1;
Vec3 wi = null;
float pdf = 0;
Vec3 fr = glossySpecular.SampleF(sr, ref wi, wo, ref pdf);
Ray reflectedRay = new Ray(sr.HitPoint, wi);
L += fr * sr.World.Tracer.TraceRay(reflectedRay, sr.Depth + 1) *
sr.Normal.Dot(wi) / pdf;
return(L);
}
