| 1 |
// data from application to vertex program |
| 2 |
struct vertexIn { |
| 3 |
float3 Position : POSITION; // pre-defined registers |
| 4 |
float4 UV : TEXCOORD0; |
| 5 |
float4 Normal : NORMAL; |
| 6 |
}; |
| 7 |
// vertex shader to pixel shader |
| 8 |
struct vertexOut { |
| 9 |
float4 HPosition : POSITION; |
| 10 |
float4 TexCoord : TEXCOORD0; |
| 11 |
float3 LightVec : TEXCOORD1; |
| 12 |
float3 WorldNormal : TEXCOORD2; |
| 13 |
float3 WorldPos : TEXCOORD3; |
| 14 |
float3 WorldView : TEXCOORD4; |
| 15 |
}; |
| 16 |
|
| 17 |
// vertex shader |
| 18 |
vertexOut main(vertexIn IN, // vertex input from app |
| 19 |
uniform float4x4 WorldViewProj, |
| 20 |
uniform float4x4 WorldProj |
| 21 |
//uniform float3 LightPos |
| 22 |
) |
| 23 |
{ |
| 24 |
float3 LightPos = { 0, 0, 0 }; |
| 25 |
vertexOut OUT; // output of the vertex shader |
| 26 |
OUT.WorldNormal = -mul(WorldProj, IN.Normal).xyz; |
| 27 |
// position in object coords: |
| 28 |
float4 Po = float4(IN.Position.x,IN.Position.y, IN.Position.z,1.0); |
| 29 |
float3 Pw = mul(WorldProj, Po).xyz; // pos in world coord |
| 30 |
|
| 31 |
|
| 32 |
OUT.WorldPos = Pw; // pos in world coords |
| 33 |
OUT.LightVec = LightPos - Pw; // light vector |
| 34 |
OUT.TexCoord = IN.UV; // original tex coords |
| 35 |
// view vector in world coords: |
| 36 |
OUT.WorldView = normalize (WorldViewProj[3].xyz - Pw); |
| 37 |
// pos in clip coords: |
| 38 |
OUT.HPosition = mul(WorldViewProj, Po); |
| 39 |
return OUT; // output of vertex shader |
| 40 |
} |
| 41 |
|
