| 1 | // data from application to vertex program |
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| 2 | struct vertexIn { |
1 | struct vertexIn { |
| 3 | float3 Position : POSITION; // pre-defined registers |
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| 4 | float4 UV : TEXCOORD0; |
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| 5 | float4 Normal : NORMAL; |
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| 6 | }; |
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| 7 | // vertex shader to pixel shader |
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| 8 | struct vertexOut { |
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| 9 | float4 HPosition : POSITION; |
2 | float4 Position : POSITION; |
| 10 | float4 TexCoord : TEXCOORD0; |
3 | float4 Normal : NORMAL; |
| 11 | float3 LightVec : TEXCOORD1; |
4 | float4 UV : TEXCOORD0; |
| 12 | float3 WorldNormal : TEXCOORD2; |
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| 13 | float3 WorldPos : TEXCOORD3; |
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| 14 | float3 WorldView : TEXCOORD4; |
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| 15 | }; |
5 | }; |
| 16 | |
6 | |
| 17 | // vertex shader |
7 | struct vertexOut { |
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8 | float4 HPosition : POSITION; |
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9 | float4 TexCoord : TEXCOORD0; |
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10 | float3 LightVec : TEXCOORD1; |
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11 | float3 EyeVec : TEXCOORD2; |
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12 | float3 WorldNormal : TEXCOORD3; |
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13 | }; |
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14 | |
| 18 | vertexOut main(vertexIn IN) |
15 | vertexOut main(vertexIn IN) |
| 19 | { |
16 | { |
| 20 | vertexOut OUT; // output of the vertex shader |
17 | vertexOut OUT; |
| 21 | |
18 | |
| 22 | OUT.WorldNormal = mul(glstate.matrix.modelview[0], IN.Normal).xyz; |
19 | float3 LightPos = { 0, 0, 0 }; |
| 23 | // position in object coords: |
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| 24 | float4 Po = float4(IN.Position.x,IN.Position.y, IN.Position.z,1.0); |
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| 25 | float3 Pw = mul(glstate.matrix.mvp, Po).xyz; // pos in world coord |
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| 26 | |
20 | |
| 27 | float3 LightPos = { 0, 0, 0}; |
21 | float4 Pw = mul (glstate.matrix.mvp, IN.Position); |
| 28 | OUT.WorldPos = Pw; // pos in world coords |
22 | |
| 29 | OUT.LightVec = LightPos - Pw; // light vector |
23 | OUT.WorldNormal = normalize (mul (glstate.matrix.modelview[0], IN.Normal).xyz); |
| 30 | OUT.TexCoord = IN.UV; // original tex coords |
24 | OUT.EyeVec = normalize (mul (glstate.matrix.modelview[0], IN.Position).xyz); |
| 31 | // view vector in world coords: |
25 | OUT.LightVec = normalize (LightPos - IN.Position).xyz; |
| 32 | OUT.WorldView = normalize (glstate.matrix.mvp[3].xyz - Pw); |
26 | OUT.TexCoord = IN.UV; |
| 33 | // pos in clip coords: |
27 | OUT.HPosition = Pw; |
| 34 | OUT.HPosition = mul(glstate.matrix.mvp, Po); |
28 | |
| 35 | return OUT; // output of vertex shader |
29 | return OUT; |
| 36 | } |
30 | } |
| 37 | |
31 | |
