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32 lines
915 B
C++
32 lines
915 B
C++
// 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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#include "isdiag.h"
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template <typename Scalar>
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IGL_INLINE bool igl::isdiag(const Eigen::SparseMatrix<Scalar> & A)
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{
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// Iterate over outside of A
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for(int k=0; k<A.outerSize(); ++k)
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{
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// Iterate over inside
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for(typename Eigen::SparseMatrix<Scalar>::InnerIterator it (A,k); it; ++it)
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{
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if(it.row() != it.col() && it.value()!=0)
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{
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return false;
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}
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}
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}
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template bool igl::isdiag<double>(class Eigen::SparseMatrix<double,0,int> const &);
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#endif
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