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Merged branch 'dev_native' into lm_sla_supports_auto

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Added igl library files
This commit is contained in:
Lukas Matena 2018-10-26 15:45:52 +02:00
commit 7681d00ee5
2865 changed files with 142806 additions and 22325 deletions
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src/igl/invert_diag.cpp Normal file
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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 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 "invert_diag.h"
template <typename T>
IGL_INLINE void igl::invert_diag(
const Eigen::SparseMatrix<T>& X,
Eigen::SparseMatrix<T>& Y)
{
#ifndef NDEBUG
typename Eigen::SparseVector<T> dX = X.diagonal().sparseView();
// Check that there are no zeros along the diagonal
assert(dX.nonZeros() == dX.size());
#endif
// http://www.alecjacobson.com/weblog/?p=2552
if(&Y != &X)
{
Y = X;
}
// Iterate over outside
for(int k=0; k<Y.outerSize(); ++k)
{
// Iterate over inside
for(typename Eigen::SparseMatrix<T>::InnerIterator it (Y,k); it; ++it)
{
if(it.col() == it.row())
{
T v = it.value();
assert(v != 0);
v = ((T)1.0)/v;
Y.coeffRef(it.row(),it.col()) = v;
}
}
}
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template void igl::invert_diag<double>(Eigen::SparseMatrix<double, 0, int> const&, Eigen::SparseMatrix<double, 0, int>&);
template void igl::invert_diag<float>(Eigen::SparseMatrix<float, 0, int> const&, Eigen::SparseMatrix<float, 0, int>&);
#endif