ID3DXEffectStateManager::SetNPatchMode method

A callback function that must be implemented by a user to set the number of subdivision segments for N-patches.

Syntax

HRESULT SetNPatchMode(
  [in] FLOAT nSegments
);

Parameters

nSegments [in]

Type: FLOAT

Break the surface into this number of subdivisions. This is the same as the number used by IDirect3DDevice9::SetNPatchMode.

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::SetNPatchMode) will fail.

Requirements

See also

ID3DXEffectStateManager