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26 lines
823 B
26 lines
823 B
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 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_ISDIAG_H
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#define IGL_ISDIAG_H
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#include "igl_inline.h"
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#include <Eigen/Sparse>
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namespace igl
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{
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/// Determine if a given matrix is diagonal: all non-zeros lie on the
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/// main diagonal.
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///
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/// @param[in] A m by n sparse matrix
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/// @return true iff and only if the matrix is diagonal.
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template <typename Derived>
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IGL_INLINE bool isdiag(const Eigen::SparseCompressedBase<Derived> & A);
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};
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#ifndef IGL_STATIC_LIBRARY
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# include "isdiag.cpp"
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#endif
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#endif
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