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shaders/randgrid.sl

 

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/* randgrid.sl - Debug test surface for RenderMan Interface.

 

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 *                               Based on standard plastic shader with a random colour for

 

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 *                               each micropolygon grid.

 

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 */

 

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surface

 

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randgrid (float Ka = 1;

 

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          float Kd = .5;

 

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          float Ks = .5;

 

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          float roughness = .1;

 

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                  color specularcolor = 1;)

 

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{

 

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        uniform color c;

 

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        point Nf = faceforward (normalize(N),I);

 

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        c=color(random(),random(),random());

 

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    Oi = Os;

 

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    Ci = Os * ( c * (Ka*ambient() + Kd*diffuse(Nf)) +

 

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                specularcolor * Ks*specular(Nf,-normalize(I),roughness));

 

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}

 

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