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Topic: Why Vector4 Texcoord



  
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   Why Vector4 Texcoord
 Poster : Nemo Krad
 Posts: 61
 Country : England
 City: Leicester

  
Posted by Nemo Krad on 14/05/2008 at 05:05:42
Riemer,

Just wondering,

Why do you define the Texcoord as a Vector4? Surly this should be a Vector2 as the Texcoord is made up from and X/Y or is this for XBOX implementation, I know the TexCoords are a little different there..
 Poster : riemer
 Posts: 1392
 Country : Belgium
 City: Antwerp

  
Posted by riemer on 14/05/2008 at 16:30:11
Nah, just being lazy.

In the vertex format, I should have used a Vector2, as now I'm sending 8 useless bytes for each vertex.

On the HLSL side where I'm passing the float4 from the vertex to the pixel shader, it doesn't really matter whether I'm sending a float2 or a float4 as on the GPU all operations are being done for 4 floats in parallel.

  
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