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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/directed_edge_parents.cpp Normal file
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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2015 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 "directed_edge_parents.h"
#include "slice_into.h"
#include "slice.h"
#include "colon.h"
#include "setdiff.h"
#include <algorithm>
template <typename DerivedE, typename DerivedP>
IGL_INLINE void igl::directed_edge_parents(
const Eigen::PlainObjectBase<DerivedE> & E,
Eigen::PlainObjectBase<DerivedP> & P)
{
using namespace Eigen;
using namespace std;
VectorXi I = VectorXi::Constant(E.maxCoeff()+1,1,-1);
//I(E.col(1)) = 0:E.rows()-1
slice_into(colon<int>(0,E.rows()-1),E.col(1).eval(),I);
VectorXi roots,_;
setdiff(E.col(0).eval(),E.col(1).eval(),roots,_);
std::for_each(roots.data(),roots.data()+roots.size(),[&](int r){I(r)=-1;});
slice(I,E.col(0).eval(),P);
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template void igl::directed_edge_parents<Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
#endif