public override Vector3 Shade(ShadeRec sr)
{
Vector3 L = base.Shade(sr);
Vector3 wo = -sr.Ray.Direction;
Vector3 wi = Vector3.Zero();
Vector3 fr = reflective_brdf.Sample_F(sr, wo, ref wi);
Ray reflected_ray = new Ray(sr.HitPoint, wi);
reflected_ray.Depth = sr.Depth + 1;
L += fr * sr.World.Tracer.TraceRay(reflected_ray, sr.Depth + 1) * Vector3.Dot(sr.Normal, wi);
return(L);
}
public override Vector3 Shade(ShadeRec sr)
{
Vector3 L = base.Shade(sr);
Vector3 wo = -sr.Ray.Direction;
Vector3 wi = Vector3.Zero();
Vector3 fr = reflective.Sample_F(sr, wo, ref wi);
Ray reflected_ray = new Ray(sr.HitPoint, wi);
if (specular_btdf.TIR(sr))
{
L += sr.World.Tracer.TraceRay(reflected_ray, sr.Depth + 1);
}
else
{
Vector3 wt = Vector3.Zero();
Vector3 ft = specular_btdf.Sample_F(sr, wo, ref wt);
Ray transmitted_ray = new Ray(sr.HitPoint, wt);
L += fr * sr.World.Tracer.TraceRay(reflected_ray, sr.Depth + 1) * Vector3.AbsDot(sr.Normal, wi);
L += ft * sr.World.Tracer.TraceRay(transmitted_ray, sr.Depth + 1) * Vector3.AbsDot(sr.Normal, wt); //this is very important for transparent rendering
}
return(L);
}