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[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 | )
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| 14 | {
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| 15 | VertexOut Out;
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| 16 |
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| 17 | Out.VertexPosition=Position;
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| 18 | Out.TexCoord=Texcoord*2.0-1.0;
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| 19 |
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| 20 | return Out;
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| 21 | }
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| 22 |
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| 23 | /*
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| 24 | Fragment program for cloud rendering
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| 25 | */
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| 26 | float4 FragmentProgram( VertexOut In):COLOR
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| 27 | {
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| 28 | float4 Color;
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| 29 | float2 UV=In.TexCoord;
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| 30 | float g2=UV.x*UV.x;
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| 31 | float phase=3*(1-g2)*(1+UV.y*UV.y)/2/(2+g2)/pow((1+g2-2*(UV.y)*(UV.x)),1.5);
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| 32 | Color=float4(phase,1,1,1);
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| 33 |
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| 34 | return Color;
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| 35 | }
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| 36 |
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