d3d9.dllGenerateAdjacency
Microsoft DirectX 9.0 SDK Update (October 2004)

ID3DXMesh::GenerateAdjacency Method


Generate a list of mesh edges and the faces that share each edge.

Syntax

HRESULT GenerateAdjacency(      

    FLOAT Epsilon,     DWORD *pAdjacency );

Parameters

Epsilon
[in] Specifies that vertices that differ in position by less than epsilon should be treated as coincident.
pAdjacency
[in] Pointer to an array of three DWORDs per face to be filled with adjacent face indices. The number of bytes in this array must be at least 3 * ID3DXBaseMesh::GetNumFaces * sizeof(DWORD).

Return Value

If the method succeeds, the return value is D3D_OK.

If the method fails, the return value can be one of the following:

D3DERR_INVALIDCALLThe method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORYMicrosoft Direct3D could not allocate sufficient memory to complete the call.


Remarks

After an application generates adjacency information for a mesh, the mesh data can be optimized for better drawing performance.

See Also

ID3DXMesh::Optimize, ID3DXMesh::OptimizeInplace


© 2004 Microsoft Corporation. All rights reserved.
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