ID3DXTextureGutterHelper::GetBaryMap method
Retrieves texel barycentric coordinates.
Syntax
HRESULT GetBaryMap(
[in, out] D3DXVECTOR2 *pBaryData
);
Parameters
-
pBaryData [in, out]
-
Type: D3DXVECTOR2*
Pointer to a D3DXVECTOR2 structure that contains the first two barycentric coordinates of each texel.
Return value
Type: HRESULT
If the method succeeds, the return value is S_OK. If the method fails, the following value will be returned.D3DERR_INVALIDCALL
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.
Barycentric coordinates define a point inside a triangle in terms of the triangle's vertices. For a more in-depth description of barycentric coordinates, see Mathworld's Barycentric Coordinates Description.
Requirements
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See also