28 lines
974 B
C++
28 lines
974 B
C++
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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) 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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#include "randperm.h"
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#include "colon.h"
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#include <algorithm>
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template <typename DerivedI>
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IGL_INLINE void igl::randperm(
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const int n,
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Eigen::PlainObjectBase<DerivedI> & I)
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{
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Eigen::VectorXi II;
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igl::colon(0,1,n-1,II);
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I = II;
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std::random_shuffle(I.data(),I.data()+n);
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template void igl::randperm<Eigen::Matrix<int, -1, 1, 0, -1, 1> >(int, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
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template void igl::randperm<Eigen::Matrix<int, -1, -1, 0, -1, -1> >(int, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
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#endif
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