text: // This file is part of libigl, a simple c++ geometry processing library.
  // 
  // Copyright (C) 2018 Alec Jacobson <alecjacobson@gmail.com>
  // 
  // This Source Code Form is subject to the terms of the Mozilla Public License 
  // v. 2.0. If a copy of the MPL was not distributed with this file, You can 
  // obtain one at http://mozilla.org/MPL/2.0/.
  #ifndef IGL_COTMATRIX_INTRINSIC_H
  #define IGL_COTMATRIX_INTRINSIC_H
  #include "igl_inline.h"
  
  
  
  
  namespace igl 
  {
    // Constructs the cotangent stiffness matrix (discrete laplacian) for a given
    // mesh with faces F and edge lengths l.
    //
    // Inputs:
    //   l  #F by 3 list of (half-)edge lengths
    //   F  #F by 3 list of face indices into some (not necessarily
    //     determined/embedable) list of vertex positions V. It is assumed #V ==
    //     F.maxCoeff()+1
    // Outputs:
    //   L  #V by #V sparse Laplacian matrix
    //
    // See also: cotmatrix, intrinsic_delaunay_cotmatrix
    template <typename Derivedl, typename DerivedF, typename Scalar>
    IGL_INLINE void cotmatrix_intrinsic(
      const Eigen::MatrixBase<Derivedl> & l, 
      const Eigen::MatrixBase<DerivedF> & F, 
      Eigen::SparseMatrix<Scalar>& L);
  }
  
  #ifndef IGL_STATIC_LIBRARY
  #  include "cotmatrix_intrinsic.cpp"
  #endif
  
  #endif
  