public void At(Surface.Intersection intersection, ref Surface.Attributes attributes)
{
Triangle tri = triangles[intersection.PrimitiveID];
if (smoothNormals)
{
// barycentric interpolation
Vector smoothed = tri.V1.Normal * intersection.LocalU
+ tri.V2.Normal * intersection.LocalV
+ tri.V0.Normal * (1 - intersection.LocalU - intersection.LocalV);
attributes.Basis = new Basis(smoothed.Normalize());
}
else
{
attributes.Basis = new Basis(tri.FaceNormal);
}
}
public void At(Surface.Intersection intersection, ref Surface.Attributes attributes)
{
attributes.Material = Material;
}