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

ID3DXPatchMesh::GenerateAdjacency Method


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

Syntax

HRESULT GenerateAdjacency(      

    FLOAT fTolerance );

Parameters

fTolerance
[in] Specifies that vertices that differ in position by less than the tolerance should be treated as coincident.

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. This method determines which patches are adjacent (within the provided tolerance). This information is used internally to optimize tessellation.

See Also

ID3DXPatchMesh::Optimize


© 2004 Microsoft Corporation. All rights reserved.
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