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Merged branch 'dev_native' into lm_sla_supports_auto

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Added igl library files
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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.h 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/.
#ifndef IGL_GROUP_SUM_MATRIX_H
#define IGL_GROUP_SUM_MATRIX_H
#include "igl_inline.h"
#include <Eigen/Dense>
#include <Eigen/Sparse>
namespace igl
{
// GROUP_SUM_MATRIX Builds a matrix A such that A*V computes the sum of
// vertices in each group specified by G
//
// group_sum_matrix(G,k,A);
//
// Templates:
// T should be a eigen sparse matrix primitive type like int or double
// Inputs:
// G #V list of group indices (0 to k-1) for each vertex, such that vertex i
// is assigned to group G(i)
// k #groups, good choice is max(G)+1
// Outputs:
// A #groups by #V sparse matrix such that A*V = group_sums
//
template <typename T>
IGL_INLINE void group_sum_matrix(
const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
const int k,
Eigen::SparseMatrix<T>& A);
// Wrapper with k = max(G)+1
template <typename T>
IGL_INLINE void group_sum_matrix(
const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
Eigen::SparseMatrix<T>& A);
}
#ifndef IGL_STATIC_LIBRARY
# include "group_sum_matrix.cpp"
#endif
#endif