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39 lines
1.3 KiB
39 lines
1.3 KiB
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2017 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_UNIQUE_ROWS_H
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#define IGL_UNIQUE_ROWS_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 [C,IA,IC] = unique(X,'rows')
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///
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/// @tparam DerivedA derived scalar type, e.g. MatrixXi or MatrixXd
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/// @tparam DerivedIA derived integer type, e.g. MatrixXi
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/// @tparam DerivedIC derived integer type, e.g. MatrixXi
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/// @param[in] A m by n matrix whose entries are to unique'd according to rows
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/// @param[out] C #C vector of unique rows in A
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/// @param[out] IA #C index vector so that C = A(IA,:);
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/// @param[out] IC #A index vector so that A = C(IC,:);
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template <typename DerivedA, typename DerivedC, typename DerivedIA, typename DerivedIC>
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IGL_INLINE void unique_rows(
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const Eigen::DenseBase<DerivedA>& A,
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Eigen::PlainObjectBase<DerivedC>& C,
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Eigen::PlainObjectBase<DerivedIA>& IA,
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Eigen::PlainObjectBase<DerivedIC>& IC);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "unique_rows.cpp"
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#endif
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#endif
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