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| template<typename DerivedV , typename DerivedF , typename DerivedZ , typename DerivedN >  | 
| void  | igl::per_face_normals (const Eigen::MatrixBase< DerivedV > &V, const Eigen::MatrixBase< DerivedF > &F, const Eigen::MatrixBase< DerivedZ > &Z, Eigen::PlainObjectBase< DerivedN > &N) | 
|   | Compute face normals via vertex position list, face list.  
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| template<typename DerivedV , typename DerivedF , typename DerivedN >  | 
| void  | igl::per_face_normals (const Eigen::MatrixBase< DerivedV > &V, const Eigen::MatrixBase< DerivedF > &F, Eigen::PlainObjectBase< DerivedN > &N) | 
|   | This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.  
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|   | 
| template<typename DerivedV , typename DerivedF , typename DerivedN >  | 
| void  | igl::per_face_normals_stable (const Eigen::MatrixBase< DerivedV > &V, const Eigen::MatrixBase< DerivedF > &F, Eigen::PlainObjectBase< DerivedN > &N) | 
|   | This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.  
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| template<typename DerivedV , typename DerivedI , typename DerivedC , typename DerivedN , typename DerivedVV , typename DerivedFF , typename DerivedJ >  | 
| void  | igl::per_face_normals (const Eigen::MatrixBase< DerivedV > &V, const Eigen::MatrixBase< DerivedI > &I, const Eigen::MatrixBase< DerivedC > &C, Eigen::PlainObjectBase< DerivedN > &N, Eigen::PlainObjectBase< DerivedVV > &VV, Eigen::PlainObjectBase< DerivedFF > &FF, Eigen::PlainObjectBase< DerivedJ > &J) | 
|   | Per face normals for a general polygon mesh.  
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