ID3DXEffectStateManager::SetNPatchMode

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

HRESULT SetNPatchMode(
  FLOAT nSegments
);

Parameters

nSegments

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

Return Values

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

Header: Declared in D3dx9effect.h.