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分享D3DXVECTOR3 * D3DXVec3Unproject(
D3DXVECTOR3 * pOut,
CONST D3DXVECTOR3 * pV,
CONST D3DVIEWPORT9 * pViewport,
CONST D3DXMATRIX * pProjection,
CONST D3DXMATRIX * pView,
CONST D3DXMATRIX * pWorld
);//pWorld
//[in] Pointer to a D3DXMATRIX structure, representing the world matrix.IDirect3DDevice9->GetTransform(D3DTS_PROJECTION,&matProj);