/
speye.h
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/
speye.h
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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 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_SPEYE_H
#define IGL_SPEYE_H
#include "igl_inline.h"
#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
#include <Eigen/Sparse>
namespace igl
{
/// Builds an m by n sparse identity matrix like matlab's speye function
/// @tparam T should be a eigen sparse matrix primitive type like int or double
/// @param[in] m number of rows
/// @param[in] n number of cols
/// @param[out] I m by n sparse matrix with 1's on the main diagonal
template <typename T>
IGL_INLINE void speye(const int n,const int m, Eigen::SparseMatrix<T> & I);
/// \overload
/// \brief m = n
template <typename T>
IGL_INLINE void speye(const int n, Eigen::SparseMatrix<T> & I);
}
#ifndef IGL_STATIC_LIBRARY
# include "speye.cpp"
#endif
#endif