source: GTP/trunk/Lib/Illum/GPUObscurancesGT/src/projection.frag @ 930

uniform float res;
uniform float first;
uniform sampler2D ztex;

varying float cosine;
varying vec2 texCoord;

void main()
{
        if( first == 0.0)
        {
                float depth = tex2D(ztex,gl_FragCoord.xy/res).a;
                if (gl_FragCoord.z < (depth + 0.000001)) discard;
        }
        gl_FragColor.rg = texCoord+0.5/512.0;
        gl_FragColor.b = cosine;
        gl_FragColor.a = gl_FragCoord.z;
}