public void Map(Hyperion.Core.Geometry.DifferentialGeometry dg, out double s, out double t, out double dsdx, out double dtdx, out double dsdy, out double dtdy)
{
s = su * dg.u + du;
t = sv * dg.v + dv;
// Compute texture differentials for 2D identity mapping
dsdx = su * dg.dudx;
dtdx = sv * dg.dvdx;
dsdy = su * dg.dudy;
dtdy = sv * dg.dvdy;
}
public double D(Hyperion.Core.Geometry.Vector wh)
{
double cosThetaH = Util.AbsCosTheta (wh);
return (Exponent + 2) * Util.InvTwoPi * Math.Pow (cosThetaH, Exponent);
}
public override BSDF GetBsdf(Hyperion.Core.Geometry.DifferentialGeometry dgGeom, Hyperion.Core.Geometry.DifferentialGeometry dgShading)
{
throw new System.NotImplementedException ();
}
public override BSSRDF GetBssrdf(Hyperion.Core.Geometry.DifferentialGeometry dg, Hyperion.Core.Geometry.Transform objectToWorld)
{
return null;
}
