关于skinmesh的几个有用的接口函数

ID3DXSkinInfo::GetMaxFaceInfluences

Gets the maximum face influences in a triangle mesh with the specified index buffer.

HRESULT GetMaxFaceInfluences(
  LPDIRECT3DINDEXBUFFER9 pIB,
  DWORD NumFaces,
  DWORD * maxFaceInfluences
);

Parameters

pIB

[in] Pointer to the index buffer that contains the mesh index data.

NumFaces

[in] Number of faces in the mesh.

maxFaceInfluences

[in] Pointer to the maximum face influences.

Return Values

If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be D3DERR_INVALIDCALL.

Requirements

Header: Declared in D3DX9Mesh.h.

 

 

sample:

//获取网格模型索引缓冲区
 LPDIRECT3DINDEXBUFFER9 pIB;
 if (FAILED(hr = pMeshContainer->pOrigMesh->GetIndexBuffer(&pIB)))
  return E_FAIL;

 //获取影响一个面(三角形)的矩阵数量
 DWORD NumMaxFaceInfl;
 hr = pMeshContainer->pSkinInfo->GetMaxFaceInfluences(pIB, pMeshContainer->pOrigMesh->GetNumFaces(), &NumMaxFaceInfl);
 pIB->Release();
 if (FAILED(hr))
  return E_FAIL;