// LS/PT: xyzShader
//
// Maps the coordinate to an RGB color. With an
// appropriate UV map and closed mesh, this can
// be part of a sculptie-production flow.
//
// poly@omino.com david van brink 2008
//

@version 1.0

flags
{
    return(COLOR); // we will modify the color of the texture
}

process: sa
// 'sa' is an instance of a Shader Object.
{
    maxSize = 1.0; // normalize to a 1m cube.

    r = sa.wPos[1] / maxSize; // x is red
    g = sa.wPos[2] / maxSize; // y is blue
    b = sa.wPos[3] / maxSize; // z is green

    if(r < 0.0) r = 0;
    if(r > 1.0) r = 1.0;
    
    if(g < 0.0) g = 0;
    if(g > 1.0) g = 1.0;
    
    if(b < 0.0) b = 0;
    if(b > 1.0) b = 1.0;
    
    sa.color[1] = r;
    sa.color[2] = b;
    sa.color[3] = g; // swap y & z... orients object correctly, and outside-out, 
                     // for a Y-cylinder map.

    sa.luminous = 1.0;
    sa.diffuse = 0;
    sa.specular = 0;
    sa.mirror = 0;
    sa.transparency = 0;
}

// eof