33 lines
915 B
C++
33 lines
915 B
C++
|
// 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 Scalar>
|
||
|
|
IGL_INLINE bool igl::isdiag(const Eigen::SparseMatrix<Scalar> & A)
|
||
|
|
{
|
||
|
|
// Iterate over outside of A
|
||
|
|
for(int k=0; k<A.outerSize(); ++k)
|
||
|
|
{
|
||
|
|
// Iterate over inside
|
||
|
|
for(typename Eigen::SparseMatrix<Scalar>::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<double>(class Eigen::SparseMatrix<double,0,int> const &);
|
||
|
|
#endif
|