[845] | 1 | struct VertexOut
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| 2 | {
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| 3 | float4 VertexPosition :POSITION;
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| 4 | float2 TexCoord :TEXCOORD;
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| 5 | };
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| 6 |
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| 7 |
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| 8 | /*
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| 9 | Vertex program for cloud rendering
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| 10 | */
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| 11 | VertexOut VertexProgram( float4 Position :POSITION,
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| 12 | float2 Texcoord: TEXCOORD,
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| 13 | uniform float4x4 ModelViewProj :state.matrix.mvp
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| 14 | )
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| 15 | {
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| 16 | VertexOut Out;
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| 17 |
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| 18 | Out.VertexPosition=mul(ModelViewProj, Position);
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| 19 | Out.TexCoord=Texcoord;
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| 20 |
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| 21 | return Out;
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| 22 | }
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| 23 |
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| 24 | /*
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| 25 | Fragment program for cloud rendering
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| 26 | */
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| 27 | float3 FragmentProgram( VertexOut In,
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| 28 | uniform samplerRECT IllumTexture,
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| 29 | uniform samplerRECT VisMap,
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| 30 | uniform samplerRECT DirectIllum,
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| 31 | uniform samplerRECT Phase,
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| 32 | uniform float2 Alb_Op
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| 33 | ):COLOR
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| 34 | {
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| 35 |
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| 36 | int thisDir=round(In.TexCoord.y);
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| 37 | int thisID=round(In.TexCoord.x);
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| 38 | float3 DirectRad;
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| 39 | float3 Radin;
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| 40 |
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| 41 | float3 Color=float3(0,0,0);
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| 42 | //texRECT(IllumTexture,float2(thisID,thisDir)).rgb;
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| 43 |
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| 44 | int visibleID=round(texRECT(VisMap,float2(thisID,thisDir)).r);
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| 45 |
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| 46 | if(visibleID<512)
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| 47 | {
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| 48 | DirectRad=texRECT(DirectIllum,float2(visibleID,thisDir)).rgb;
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| 49 | Radin=texRECT(IllumTexture,float2(visibleID,thisDir)).rgb;
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| 50 |
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| 51 | Color+=(1-Alb_Op.y)*(Radin+DirectRad);
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| 52 | }
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| 53 |
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| 54 | float a_o=Alb_Op.x*Alb_Op.y*1.0/4.0;
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| 55 |
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| 56 | for(int d=0;d<4;d++)
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| 57 | {
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| 58 | visibleID=round(texRECT(VisMap,float2(thisID,d)).r);
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| 59 |
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| 60 | if(visibleID<4)
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| 61 | {
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| 62 | DirectRad=texRECT(DirectIllum,float2(visibleID,thisDir)).rgb;
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| 63 | Radin=texRECT(IllumTexture,float2(visibleID,d));
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| 64 | Color+=(Radin+DirectRad)*a_o*texRECT(Phase,float2(d,thisDir)).r;
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| 65 | }
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| 66 | }
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| 67 |
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| 68 | return Color;
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| 69 | }
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| 70 |
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| 71 |
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