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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_SORTROWS_H
#define IGL_SORTROWS_H
#include "igl_inline.h"
#include <vector>
#include <Eigen/Core>
namespace igl
{
// Act like matlab's [Y,I] = sortrows(X)
//
// Templates:
// DerivedX derived scalar type, e.g. MatrixXi or MatrixXd
// DerivedI derived integer type, e.g. MatrixXi
// Inputs:
// X m by n matrix whose entries are to be sorted
// ascending sort ascending (true, matlab default) or descending (false)
// Outputs:
// Y m by n matrix whose entries are sorted (**should not** be same
// reference as X)
// I m list of indices so that
// Y = X(I,:);
template <typename DerivedX, typename DerivedI>
IGL_INLINE void sortrows(
const Eigen::DenseBase<DerivedX>& X,
const bool ascending,
Eigen::PlainObjectBase<DerivedX>& Y,
Eigen::PlainObjectBase<DerivedI>& I);
}
#ifndef IGL_STATIC_LIBRARY
# include "sortrows.cpp"
#endif
#endif
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