vs

Provides a method to specify the type and version of the shader code.

vs.mainVer.subVer

Registers

mainVer

Main version number of the vertex shader.

subVer

Sub version number of the vertex shader.

Remarks

This instruction is required to be at the beginning of all vertex shaders.

Example

This example illustrates an example shader file.

// shader file
vs.1.0			    ; declare version number
m4x4 oPos, v0, c0	; transform vertices by view/projection matrix
mov oD0, c4		    ; output constant color

The output vertex color is green and is shown below.
 


// Additional code is required to initialize the constant registers
// as shown below.

D3DXMATRIX mat, matView, matProj;
D3DXMatrixMultiply(&mat, &matView, &matProj);
D3DXMatrixTranspose(&mat, &mat);
// set C0 with the view and projection matrix
m_pd3dDevice->SetVertexShaderConstant(0, &mat, 4);

// set register c4
float colorGreen[4] = {0, 1, 0, 0};
m_pd3dDevice->SetVertexShaderConstant(4, &colorGreen, 1);

// The first SetVertexShaderConstant method binds the C0 register with the first 
// row of the view/projection matrix (rows 2, 3 and 4 are bound to registers C2, C3 and 
// c4 also). The m4x4 instruction (in the shader file) loads the data.
// The second SetVertexShaderConstant method binds the C4 register with 
// the color green.