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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/group_sum_matrix.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 "group_sum_matrix.h"
template <typename T>
IGL_INLINE void igl::group_sum_matrix(
const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
const int k,
Eigen::SparseMatrix<T>& A)
{
// number of vertices
int n = G.rows();
assert(k > G.maxCoeff());
A.resize(k,n);
// builds A such that A(i,j) = 1 where i corresponds to group i and j
// corresponds to vertex j
// Loop over vertices
for(int j = 0;j<n;j++)
{
A.insert(G(j),j) = 1;
}
A.makeCompressed();
}
template <typename T>
IGL_INLINE void igl::group_sum_matrix(
const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
Eigen::SparseMatrix<T>& A)
{
return group_sum_matrix(G,G.maxCoeff()+1,A);
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template void igl::group_sum_matrix<double>(Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, int, Eigen::SparseMatrix<double, 0, int>&);
template void igl::group_sum_matrix<double>(Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::SparseMatrix<double, 0, int>&);
#endif