public override BSDF GetBsdf(DifferentialGeometry dgGeom, DifferentialGeometry dgShading)
{
DifferentialGeometry dgs = new DifferentialGeometry ();
if (BumpMap != null)
Bump (BumpMap, dgGeom, dgShading, ref dgs);
else
dgs = new DifferentialGeometry (dgShading);
BSDF bsdf = new BSDF (dgs, dgGeom.n);
Spectrum r = Kd.Evaluate (dgs).Clamp ();
double sig = Util.Clamp (Sigma.Evaluate (dgs), 0.0, 90.0);
if (sig == 0.0)
bsdf.Add (new Lambertian (r));
else
bsdf.Add (new OrenNayar (r, sig));
return bsdf;
}
public override BSDF GetBsdf(DifferentialGeometry dgGeom, DifferentialGeometry dgShading)
{
DifferentialGeometry dgs = new DifferentialGeometry ();
if (BumpMap != null)
Bump (BumpMap, dgGeom, dgShading, ref dgs);
else
dgs = new DifferentialGeometry (dgShading);
BSDF bsdf = new BSDF (dgs, dgGeom.n);
Spectrum R = Kr.Evaluate (dgs).Clamp ();
double e = Eta.Evaluate (dgs);
if (!R.IsBlack)
bsdf.Add (new SpecularReflection (R, new FresnelDielectric (1.0, e)));
return bsdf;
}
