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Retrieves texel barycentric coordinates.
Syntax
HRESULT GetBaryMap(
D3DXVECTOR2 *pBaryData );
Parameters
- pBaryData
- [in, out] Pointer to a D3DXVECTOR2 structure that contains the first two barycentric coordinates of each texel.
Return Value
If the method succeeds, the return value is S_OK.
If the method fails, the following value will be returned.
D3DERR_INVALIDCALL The method call is invalid. For example, a method's parameter may have an invalid value.
Remarks
The third barycentric coordinate is given by:
1 - ( pBaryData.x + pBaryData.y )Barycentric coordinates are always specified with respect to the triangle returned by ID3DXTextureGutterHelper::GetFaceMap.The barycentric coordinates returned by this method are valid only for valid (non-class 0) texels. ID3DXTextureGutterHelper::GetGutterMap will return nonzero values for valid texels.
Class 2 texels are mapped to the nearest point on the triangle in texel space.
The application must allocate and manage pBaryData.