source: GTP/trunk/App/Demos/Illum/IBRBillboardCloudTrees/OGRE/IBRTreesOGRE/media/oldgeneral/depth_tree_leaves_fp.cg @ 1493

/*
sampler ImpostorMap;
float4 main(float3 lightVec: TEXCOORD0, float3 texCoord: TEXCOORD1) : COLOR {
   // Output radial distance   
   float alpha = tex2D(ImpostorMap, texCoord).z;
   
   float depth;
   depth = length(lightVec);
   //return length(lightVec);
   return float4(depth,depth,depth,alpha);
}
*/

float4 main(
            float4 lightvec: TEXCOORD2, 
            float3 texCoord: TEXCOORD0, 
            float3 texCoordNormalized: TEXCOORD1,
            float4 color: COLOR0,
            uniform float nearDistance,
            uniform float farDistance,
            uniform sampler2D orderFrontBack,
            uniform sampler2D leaf): COLOR
{
   // Output radial distance   
   float depth;
   depth = length(lightvec.xyz);
   
   float4 tempcolor;
   //tempcolor = float4(depth,depth,depth,tex2D(orderFrontBack,texCoord).w);
   tempcolor = (tex2D(orderFrontBack, texCoord).x >= 0.0) ? tex2D(leaf,((texCoordNormalized - tex2D(orderFrontBack, texCoord).xy) + tex2D(orderFrontBack, texCoord).zw) * 64.0) : 0.0; 
   tempcolor = (tempcolor.w > 0.0) ? float4(depth,depth,depth,tempcolor.w) : 0.0;
   
   float4 ocolor;
   //ocolor = tempcolor;
   ocolor = color;

   return ocolor;

   //float value = (tempcolor.w > 0.0) ? depth : 0.0;
   //return value;
}