2 replies to this topic

[Tunisia hawker]

I wonder if I can get world matrix in shader using register.I wrote this in C++ and used a fixed pipeline:
[source lang="cpp"]g_pd3dDevice->SetTransform(D3DTS_WORLD, &matWorldSave);[/source]
Now I want to add a shader,and use world matrix without changing code above.For example,I can use register s0 to represent the first texture in shader.Which register should I use?

[Nik02]

Shaders don't have access to the fixed-function matrices.

You can use IDirect3DDevice9::SetVertexShaderConstantF method to set the matrix to the vertex shader constant registers. A 4x4 matrix is effectively just an array of 16 floats.

[Tunisia hawker]

Thanks! I'll change my code anyway.