Mercurial > octave
view liboctave/array/Array-b.cc @ 31248:8b75954a4670
delaunayn: adjust node ordering for positive outward normal vectors (bug #53397)
* delaunayn.m: Check sign of simplex volume, flip node order for negative
volumes to ensure positive (outward-pointing) normal vectors. Add BISTs to
check for positive volumes.
* etc/News.8.md: Append function improvement note to delaunayn change
paragraph under General Improvements.
author | Nicholas R. Jankowski <jankowski.nicholas@gmail.com> |
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date | Thu, 29 Sep 2022 23:09:05 -0400 |
parents | 796f54d4ddbf |
children | 7e60506a5428 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave is free software: you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Octave is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif // Instantiate Arrays of bool values. #include "Array.h" #include "Array.cc" #define INLINE_ASCENDING_SORT 1 #define INLINE_DESCENDING_SORT 1 #include "oct-sort.cc" // Prevent implicit instantiations on some systems (Windows, others?) // that can lead to duplicate definitions of static data members. extern template class Array<octave::idx_vector>; extern template class Array<octave_idx_type>; // Specialize bool sorting (aka stable partitioning). template <bool desc> static void do_bool_partition (bool *data, octave_idx_type nel) { octave_idx_type k = 0; for (octave_idx_type i = 0; i < nel; i++) if (data[i] == desc) data[k++] = desc; for (octave_idx_type i = k; i < nel; i++) data[i] = ! desc; } template <bool desc> static void do_bool_partition (bool *data, octave_idx_type *idx, octave_idx_type nel) { // FIXME: This is essentially a simple bucket sort. // Can it be efficiently done by std::partition? OCTAVE_LOCAL_BUFFER (octave_idx_type, jdx, nel); octave_idx_type k = 0; octave_idx_type l = 0; for (octave_idx_type i = 0; i < nel; i++) { if (data[i] == desc) { data[k] = desc; idx[k++] = idx[i]; } else jdx[l++] = idx[i]; } for (octave_idx_type i = k; i < nel; i++) { data[i] = ! desc; idx[i] = jdx[i-k]; } } template <> template <> void octave_sort<bool>::sort (bool *data, octave_idx_type nel, std::less<bool>) { do_bool_partition<false> (data, nel); } template <> template <> void octave_sort<bool>::sort (bool *data, octave_idx_type nel, std::greater<bool>) { do_bool_partition<true> (data, nel); } template <> template <> void octave_sort<bool>::sort (bool *data, octave_idx_type *idx, octave_idx_type nel, std::less<bool>) { do_bool_partition<false> (data, idx, nel); } template <> template <> void octave_sort<bool>::sort (bool *data, octave_idx_type *idx, octave_idx_type nel, std::greater<bool>) { do_bool_partition<true> (data, idx, nel); } template class octave_sort<bool>; INSTANTIATE_ARRAY (bool, OCTAVE_API); template OCTAVE_API std::ostream& operator << (std::ostream&, const Array<bool>&); #include "DiagArray2.h" #include "DiagArray2.cc" template class DiagArray2<bool>;