41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
// 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"
|
|
|
|
#include <Eigen/Dense>
|
|
#include <Eigen/Sparse>
|
|
|
|
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
|