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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/slice_cached.cpp Normal file
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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2017 Daniele Panozzo <daniele.panozzo@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 "slice_cached.h"
#include <iostream>
#include <vector>
#include <utility>
#include "slice.h"
template <typename TX, typename TY, typename DerivedI>
IGL_INLINE void igl::slice_cached_precompute(
const Eigen::SparseMatrix<TX>& X,
const Eigen::Matrix<int,Eigen::Dynamic,1> & R,
const Eigen::Matrix<int,Eigen::Dynamic,1> & C,
Eigen::MatrixBase<DerivedI>& data,
Eigen::SparseMatrix<TY>& Y
)
{
// Create a sparse matrix whose entries are the ids
Eigen::SparseMatrix<unsigned> TS = X.template cast<unsigned>();
TS.makeCompressed();
for (unsigned i=0;i<TS.nonZeros();++i)
*(TS.valuePtr() + i) = i;
Eigen::SparseMatrix<unsigned> TS_sliced;
igl::slice(TS,R,C,TS_sliced);
Y = TS_sliced.cast<TY>();
data.resize(TS_sliced.nonZeros());
for (unsigned i=0;i<data.size();++i)
{
data[i] = *(TS_sliced.valuePtr() + i);
*(Y.valuePtr() + i) = *(X.valuePtr() + data[i]);
}
}
template <typename TX, typename TY, typename DerivedI>
IGL_INLINE void igl::slice_cached(
const Eigen::SparseMatrix<TX>& X,
const Eigen::MatrixBase<DerivedI>& data,
Eigen::SparseMatrix<TY>& Y
)
{
for (unsigned i=0; i<data.size(); ++i)
*(Y.valuePtr() + i) = *(X.valuePtr() + data[i]);
}
#ifdef IGL_STATIC_LIBRARY
template void igl::slice_cached<double, double, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<double, 0, int> const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> > const&, Eigen::SparseMatrix<double, 0, int>&);
template void igl::slice_cached_precompute<double, double, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<double, 0, int> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&, Eigen::SparseMatrix<double, 0, int>&);
#endif