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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_INVALIDCALL The method call is invalid. For example, a method's parameter may have an invalid value. E_OUTOFMEMORY Microsoft 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