source: GTP/trunk/Lib/Vis/Preprocessing/src/depth_peeling2d.cg @ 1964

float3 main(in float4 col : COL0,
            in float3 pos : WPOS,
            uniform float texWidth,
            uniform float stepSize,
            uniform sampler2D depthTex) : COLOR
{
   float zold = tex2D(depthTex, pos.xy / texWidth);

   if(pos.z < (zold + stepSize))
      discard;
   else;

   return col;
   
}