Re: two different shaders in the same geometry object??

<fruela@[EMAIL PROTECTED]
> wrote:
> It is possible to create a sphere with one half "metal shader" and the
> other half with "matte shader"?

The easiest way is to create two hemispheres:

    Surface "metal"
    Sphere 1 -1 0 360
    Surface "matte"
    Sphere 1 0 1 360

Another way is to write one shader that does it all:

    surface metalmatte(float Ka = 1, Kd = 1, Ks = 1, roughness = 0.1)
    {
        normal Nf = faceforward(normalize(N), I);
        Oi = Os;
        if (v < 0.5)
            Ci = Os * Cs * (Ka * ambient() +
                Ks * specular(Nf, normalize(-I), roughness));
        else
            Ci = Os * Cs * (Ka * ambient() + Kd * diffuse(Nf));
    }


Rick LaMont
Dot C Software, Inc.
http://www.dotcsw.com/