IDirect3DDevice9::SetVertexShaderConstantF Method

Sets a floating-point vertex shader constant.

Syntax

HRESULT SetVertexShaderConstantF(      

    UINT StartRegister,
    CONST float *pConstantData,
    UINT Vector4fCount
);

Parameters

StartRegister

[in] Register number that will contain the first constant value.

pConstantData

[in] Pointer to an array of constants.

Vector4fCount

[in] Number of four float vectors in the array of constants.

Return Value

If the method succeeds, the return value is D3D_OK.

If the method fails, the return value can be

D3DERR_INVALIDCALL

The method call is invalid. For example, a method's parameter may have an invalid value.