ID3DXEffectStateManager::SetVertexShaderConstantF method

A callback function that must be implemented by a user to set an array of vertex shader floating-point constants.

Syntax

HRESULT SetVertexShaderConstantF(
  [out]       UINT  StartRegister,
  [out] const FLOAT *pConstantData,
  [out]       UINT  RegisterCount
);

Parameters

StartRegister [out]

Type: UINT

The zero-based index of the first constant register.

pConstantData [out]

Type: const FLOAT*

An array of floating-point constants.

RegisterCount [out]

Type: UINT

The number of registers in pConstantData.

Return value

Type: HRESULT

The user-implemented method should return S_OK. If the callback fails when setting the device state, either of the following will occur:

• The effect will fail during ID3DXEffect::BeginPass.
• The dynamic effect state call (such as IDirect3DDevice9::SetVertexShaderConstantF) will fail.

Requirements

Requirement	Value
Header	D3DX9Effect.h
Library	D3dx9.lib

See also

ID3DXEffectStateManager