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42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_SORTROWS_H
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#define IGL_SORTROWS_H
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#include "igl_inline.h"
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#include <vector>
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#include <Eigen/Core>
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namespace igl
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{
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// Act like matlab's [Y,I] = sortrows(X)
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//
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// Templates:
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// DerivedX derived scalar type, e.g. MatrixXi or MatrixXd
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// DerivedI derived integer type, e.g. MatrixXi
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// Inputs:
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// X m by n matrix whose entries are to be sorted
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// ascending sort ascending (true, matlab default) or descending (false)
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// Outputs:
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// Y m by n matrix whose entries are sorted (**should not** be same
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// reference as X)
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// I m list of indices so that
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// Y = X(I,:);
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template <typename DerivedX, typename DerivedI>
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IGL_INLINE void sortrows(
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const Eigen::DenseBase<DerivedX>& X,
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const bool ascending,
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Eigen::PlainObjectBase<DerivedX>& Y,
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Eigen::PlainObjectBase<DerivedI>& I);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "sortrows.cpp"
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#endif
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#endif
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