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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_SPEYE_H
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#define IGL_SPEYE_H
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#include "igl_inline.h"
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#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
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#include <Eigen/Sparse>
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namespace igl
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{
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// Builds an m by n sparse identity matrix like matlab's speye function
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// Templates:
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// T should be a eigen sparse matrix primitive type like int or double
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// Inputs:
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// m number of rows
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// n number of cols
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// Outputs:
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// I m by n sparse matrix with 1's on the main diagonal
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template <typename T>
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IGL_INLINE void speye(const int n,const int m, Eigen::SparseMatrix<T> & I);
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// Builds an n by n sparse identity matrix like matlab's speye function
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// Templates:
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// T should be a eigen sparse matrix primitive type like int or double
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// Inputs:
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// n number of rows and cols
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// Outputs:
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// I n by n sparse matrix with 1's on the main diagonal
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template <typename T>
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IGL_INLINE void speye(const int n, Eigen::SparseMatrix<T> & I);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "speye.cpp"
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#endif
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#endif
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