source: GTP/trunk/Lib/Vis/Preprocessing/src/dual_depth.cg @ 540

Revision 540, 587 bytes checked in by mattausch, 19 years ago (diff)
Line 
1struct fragment
2{
3        float4 position  : POSITION;    //screen position
4        float4 color0    : COLOR0;
5        float4 depthTexCoord: TEXCOORD0;
6};
7
8
9struct pixel
10{
11        float4 color : COLOR;   
12};
13
14pixel main(fragment IN, const uniform sampler2D depthMap)
15{
16        pixel OUT;
17        OUT.color = IN.color0;
18       
19        // the depth buffer     has to be compared to the current depth
20        float4 depth = tex2D(depthMap, IN.depthTexCoord.xy);
21        float test = IN.depthTexCoord.z / IN.depthTexCoord.w;
22       
23        // reject by alpha test
24        if (test < depth.x)
25        {
26                OUT.color.w = 0;
27        //      OUT.color.y += 0.5;
28        }
29       
30        return OUT;
31}
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