Mercurial > octave
view liboctave/util/d1mach.f @ 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 | 597f3ee61a48 |
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c Copyright (C) 1996-2022 The Octave Project Developers c c See the file COPYRIGHT.md in the top-level directory of this c distribution or <https://octave.org/copyright/>. c c This file is part of Octave. c c Octave is free software: you can redistribute it and/or modify it c under the terms of the GNU General Public License as published by c the Free Software Foundation, either version 3 of the License, or c (at your option) any later version. c c Octave is distributed in the hope that it will be useful, but c WITHOUT ANY WARRANTY; without even the implied warranty of c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the c GNU General Public License for more details. c c You should have received a copy of the GNU General Public License c along with Octave; see the file COPYING. If not, see c <https://www.gnu.org/licenses/>. c double precision function d1mach (i) integer i logical init double precision dmach(5) double precision dlamch external dlamch save init, dmach data init /.false./ if (.not. init) then dmach(1) = dlamch ('u') dmach(2) = dlamch ('o') dmach(3) = dlamch ('e') dmach(4) = dlamch ('p') dmach(5) = log10 (dlamch ('b')) init = .true. endif if (i .lt. 1 .or. i .gt. 5) goto 999 d1mach = dmach(i) return 999 write (*, 1999) i 1999 format (' d1mach - i out of bounds', i10) call xstopx (' ') d1mach = 0 end