Noise
eharetea

A noise surface shader in VEX.

A .vfl file that computes a noise shader.

Date Created:Friday December 29th, 2006 03:41 AM
Date Modified:Wednesday July 30th, 2008 04:13 PM


#pragma opname dan_material
#pragma oplabel "VEX DPL Material"

//hint tells you what kind of parameter it is
#pragma hint clr color

//label renames everything so its easier to understand in GUI
#pragma label clr "color"
#pragma label multdan "multiply"
#pragma label dnfreq "Frequency"
#pragma label diff "Diffuse"
#pragma label spec "Specular"
#pragma label amb "Ambient"
#pragma label rough "Roughness"

//smooths edges and anti-aliasing
float pulse(float a,b,fuzz,x)
{
    return(smooth(a-fuzz,a,x)-smooth(b-fuzz,b,x));
}

surface danman  (
//parameters
        vector clr={0,1,0};
        float multdan 1;
        float dnfreq 1;
        float diff 1;
        float spec 1;
        float amb 0.1;
    float rough 0.1;
                )
{

//here is where the magic happens

        vector restposdan_noise;

        //make a rest position in vex for object space
        restpos wo_space(P)*dnfreq;

        //this is for noise with color
        dan_noise snoise(restpos)*(clr);

        //set the opacity based on the noise
        vector opac dan_noise;

        vector newcolr multdan*dan_noise;

        //this is what you do for black and white
        float dnny noise(P)*multdan;

        vector ng frontface(normalize(N), I);


        Cf =  dnny;
        Cf += amb ambient();
        Cf += diff diffuse(ng);
        Cf += spec specular(ngnormalize(I), 1.0/rough);
        Of =  opac;
    Cf *= Of;

}




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Creative Commons License
Noise by Dan Lynch
is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License
Based on a work at www.3daet.com
Permissions beyond the scope of this license may be available at http://www.3daet.com