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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2016 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/.
#include "isdiag.h"
template <typename Derived>
IGL_INLINE bool igl::isdiag(const Eigen::SparseCompressedBase<Derived> & A)
{
// Iterate over outside of A
for(int k=0; k<A.outerSize(); ++k)
{
// Iterate over inside
for(typename Derived::InnerIterator it (A,k); it; ++it)
{
if(it.row() != it.col() && it.value()!=0)
{
return false;
}
}
}
return true;
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template bool igl::isdiag<Eigen::SparseMatrix<double,0,int>>(Eigen::SparseCompressedBase<Eigen::SparseMatrix<double,0,int>> const &);
#endif