octave: libinterp/corefcn/__contourc_

annotate libinterp/corefcn/contourc.cc @ 29359:7854d5752dd2

maint: merge stable to default.

author	John W. Eaton <jwe@octave.org>
date	Wed, 10 Feb 2021 10:10:40 -0500
parents	7bfc454b9e08 0a5b15007766
children	32c3a5805893

rev	line source
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	1 ////////////////////////////////////////////////////////////////////////
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	2 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	3 // Contour lines for function evaluated on a grid.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	4 //
29358 0a5b15007766 update Octave Project Developers copyright for the new year John W. Eaton <jwe@octave.org> parents: 27923 diff changeset	5 // Copyright (C) 2001-2021 The Octave Project Developers
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	6 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	7 // See the file COPYRIGHT.md in the top-level directory of this
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	8 // distribution or <https://octave.org/copyright/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	9 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	10 // Adapted to an oct file from the stand alone contourl by Victro Munoz
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	11 // Copyright (C) 2004 Victor Munoz
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	12 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	13 // Based on contour plot routine (plcont.c) in PLPlot package
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	14 // http://plplot.org/
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	15 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	16 // Copyright (C) 1995, 2000, 2001 Maurice LeBrun
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	17 // Copyright (C) 2000, 2002 Joao Cardoso
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	18 // Copyright (C) 2000, 2001, 2002, 2004 Alan W. Irwin
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	19 // Copyright (C) 2004 Andrew Ross
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	20 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	21 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	22 // This file is part of Octave.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	23 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	24 // Octave is free software: you can redistribute it and/or modify it
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	25 // under the terms of the GNU General Public License as published by
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	26 // the Free Software Foundation, either version 3 of the License, or
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	27 // (at your option) any later version.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	28 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	29 // Octave is distributed in the hope that it will be useful, but
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	30 // WITHOUT ANY WARRANTY; without even the implied warranty of
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	31 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	32 // GNU General Public License for more details.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	33 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	34 // You should have received a copy of the GNU General Public License
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	35 // along with Octave; see the file COPYING. If not, see
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	36 // <https://www.gnu.org/licenses/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	37 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	38 ////////////////////////////////////////////////////////////////////////
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	39
21724 aba2e6293dd8 use "#if ..." consistently instead of "#ifdef" and "#ifndef" John W. Eaton <jwe@octave.org> parents: 21562 diff changeset	40 #if defined (HAVE_CONFIG_H)
21301 40de9f8f23a6 Use '#include "config.h"' rather than <config.h>. Rik <rik@octave.org> parents: 21200 diff changeset	41 # include "config.h"
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	42 #endif
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	43
23455 73ff72d3d603 maint: Eliminate <cfloat.h> header from libinterp files Rik <rik@octave.org> parents: 23220 diff changeset	44 #include <limits>
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	45
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14501 diff changeset	46 #include "defun.h"
23455 73ff72d3d603 maint: Eliminate <cfloat.h> header from libinterp files Rik <rik@octave.org> parents: 23220 diff changeset	47 #include "ov.h"
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	48
20802 8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	49 // FIXME: this looks like trouble...
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	50 static Matrix this_contour;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	51 static Matrix contourc;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	52 static int elem;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	53
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	54 // This is the quanta in which we increase this_contour.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	55 #define CONTOUR_QUANT 50
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	56
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	57 // Add a coordinate point (x,y) to this_contour.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	58 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	59 add_point (double x, double y)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	60 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	61 if (elem % CONTOUR_QUANT == 0)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	62 this_contour = this_contour.append (Matrix (2, CONTOUR_QUANT, 0));
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	63
29278 7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	64 this_contour(0, elem) = x;
7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	65 this_contour(1, elem) = y;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	66 elem++;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	67 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	68
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	69 // Add contents of current contour to contourc.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	70 // this_contour.cols () - 1;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	71 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	72 end_contour (void)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	73 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	74 if (elem > 2)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	75 {
29278 7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	76 this_contour(1, 0) = elem - 1;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	77 contourc = contourc.append (this_contour.extract_n (0, 0, 2, elem));
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	78 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	79
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	80 this_contour = Matrix ();
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	81 elem = 0;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	82 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	83
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	84 // Start a new contour, and add contents of current one to contourc.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	85
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	86 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	87 start_contour (double lvl, double x, double y)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	88 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	89 end_contour ();
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	90 this_contour.resize (2, 0);
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	91 add_point (lvl, 0);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	92 add_point (x, y);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	93 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	94
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	95 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	96 drawcn (const RowVector& X, const RowVector& Y, const Matrix& Z,
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	97 double lvl, int r, int c, double ct_x, double ct_y,
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	98 unsigned int start_edge, bool first, charMatrix& mark)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	99 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	100 double px[4], py[4], pz[4], tmp;
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	101 unsigned int stop_edge, pt[2];
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	102
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	103 // Continue while next facet is not done yet.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	104 while (r >= 0 && c >= 0 && r < mark.rows () && c < mark.cols ()
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	105 && mark(r, c) > 0)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	106 {
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	107
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	108 //get x, y, and z - lvl for current facet
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	109 px[0] = px[3] = X(c);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	110 px[1] = px[2] = X(c+1);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	111
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	112 py[0] = py[1] = Y(r);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	113 py[2] = py[3] = Y(r+1);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	114
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	115 pz[3] = Z(r+1, c) - lvl;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	116 pz[2] = Z(r+1, c + 1) - lvl;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	117 pz[1] = Z(r, c+1) - lvl;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	118 pz[0] = Z(r, c) - lvl;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	119
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	120 // Facet edge and point naming assignment.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	121 //
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	122 // 0-----1 .-0-.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	123 // \| \| \| \|
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	124 // \| \| 3 1
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	125 // \| \| \| \|
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	126 // 3-----2 .-2-.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	127
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	128 // Get mark value of current facet.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	129 char id = static_cast<char> (mark(r, c));
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	130
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	131 // Check startedge s.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	132 if (start_edge == 255)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	133 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	134 // Find start edge.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	135 for (unsigned int k = 0; k < 4; k++)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	136 if (static_cast<char> (1 << k) & id)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	137 start_edge = k;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	138 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	139
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	140 if (start_edge == 255)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	141 break;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	142
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	143 // Decrease mark value of current facet for start edge.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	144 mark(r, c) -= static_cast<char> (1 << start_edge);
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	145
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	146 // Next point (clockwise).
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	147 pt[0] = start_edge;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	148 pt[1] = (pt[0] + 1) % 4;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	149
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	150 // Calculate contour segment start if first of contour.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	151 if (first)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	152 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	153 tmp = fabs (pz[pt[1]]) / fabs (pz[pt[0]]);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	154
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	155 if (octave::math::isnan (tmp))
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	156 ct_x = ct_y = 0.5;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	157 else
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	158 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	159 ct_x = px[pt[0]] + (px[pt[1]] - px[pt[0]])/(1 + tmp);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	160 ct_y = py[pt[0]] + (py[pt[1]] - py[pt[0]])/(1 + tmp);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	161 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	162
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	163 start_contour (lvl, ct_x, ct_y);
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	164 first = false;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	165 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	166
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	167 // Find stop edge.
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	168 // FIXME: perhaps this should use a while loop?
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	169 for (unsigned int k = 1; k <= 4; k++)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	170 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	171 if (start_edge == 0 \|\| start_edge == 2)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	172 stop_edge = (start_edge + k) % 4;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	173 else
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	174 stop_edge = (start_edge - k) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	175
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	176 if (static_cast<char> (1 << stop_edge) & id)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	177 break;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	178 }
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	179
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	180 pt[0] = stop_edge;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	181 pt[1] = (pt[0] + 1) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	182 tmp = fabs (pz[pt[1]]) / fabs (pz[pt[0]]);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	183
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	184 if (octave::math::isnan (tmp))
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	185 ct_x = ct_y = 0.5;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	186 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	187 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	188 ct_x = px[pt[0]] + (px[pt[1]] - px[pt[0]])/(1 + tmp);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	189 ct_y = py[pt[0]] + (py[pt[1]] - py[pt[0]])/(1 + tmp);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	190 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	191
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	192 // Add point to contour.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	193 add_point (ct_x, ct_y);
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	194
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	195 // Decrease id value of current facet for start edge.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	196 mark(r, c) -= static_cast<char> (1 << stop_edge);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	197
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	198 // Find next facet.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	199 if (stop_edge == 0)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	200 r--;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	201 else if (stop_edge == 1)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	202 c++;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	203 else if (stop_edge == 2)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	204 r++;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	205 else if (stop_edge == 3)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	206 c--;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	207
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	208 // Go to next facet.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	209 start_edge = (stop_edge + 2) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	210
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	211 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	212 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	213
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	214 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	215 mark_facets (const Matrix& Z, charMatrix& mark, double lvl)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	216 {
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	217 unsigned int nr = mark.rows ();
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	218 unsigned int nc = mark.cols ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	219
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	220 double f[4];
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	221
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	222 for (unsigned int c = 0; c < nc; c++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	223 for (unsigned int r = 0; r < nr; r++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	224 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	225 f[0] = Z(r, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	226 f[1] = Z(r, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	227 f[3] = Z(r+1, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	228 f[2] = Z(r+1, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	229
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	230 for (unsigned int i = 0; i < 4; i++)
15220 61822c866ba1 use std::numeric_limits<T>::epsilon in C++ code John W. Eaton <jwe@octave.org> parents: 15195 diff changeset	231 if (fabs(f[i]) < std::numeric_limits<double>::epsilon ())
61822c866ba1 use std::numeric_limits<T>::epsilon in C++ code John W. Eaton <jwe@octave.org> parents: 15195 diff changeset	232 f[i] = std::numeric_limits<double>::epsilon ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	233
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	234 if (f[1] * f[2] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	235 mark(r, c) += 2;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	236
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	237 if (f[0] * f[3] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	238 mark(r, c) += 8;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	239 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	240
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	241 for (unsigned int r = 0; r < nr; r++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	242 for (unsigned int c = 0; c < nc; c++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	243 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	244 f[0] = Z(r, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	245 f[1] = Z(r, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	246 f[3] = Z(r+1, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	247 f[2] = Z(r+1, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	248
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	249 for (unsigned int i = 0; i < 4; i++)
15220 61822c866ba1 use std::numeric_limits<T>::epsilon in C++ code John W. Eaton <jwe@octave.org> parents: 15195 diff changeset	250 if (fabs(f[i]) < std::numeric_limits<double>::epsilon ())
61822c866ba1 use std::numeric_limits<T>::epsilon in C++ code John W. Eaton <jwe@octave.org> parents: 15195 diff changeset	251 f[i] = std::numeric_limits<double>::epsilon ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	252
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	253 if (f[0] * f[1] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	254 mark(r, c) += 1;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	255
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	256 if (f[2] * f[3] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	257 mark(r, c) += 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	258 }
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	259 }
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	260
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	261 static void
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	262 cntr (const RowVector& X, const RowVector& Y, const Matrix& Z, double lvl)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	263 {
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	264 unsigned int nr = Z.rows ();
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	265 unsigned int nc = Z.cols ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	266
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	267 charMatrix mark (nr - 1, nc - 1, 0);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	268
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	269 mark_facets (Z, mark, lvl);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	270
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	271 // Find contours that start at a domain edge.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	272
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	273 for (unsigned int c = 0; c < nc - 1; c++)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	274 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	275 // Top.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	276 if (mark(0, c) & 1)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	277 drawcn (X, Y, Z, lvl, 0, c, 0.0, 0.0, 0, true, mark);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	278
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	279 // Bottom.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	280 if (mark(nr - 2, c) & 4)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	281 drawcn (X, Y, Z, lvl, nr - 2, c, 0.0, 0.0, 2, true, mark);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	282 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	283
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	284 for (unsigned int r = 0; r < nr - 1; r++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	285 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	286 // Left.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	287 if (mark(r, 0) & 8)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	288 drawcn (X, Y, Z, lvl, r, 0, 0.0, 0.0, 3, true, mark);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	289
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	290 // Right.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	291 if (mark(r, nc - 2) & 2)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	292 drawcn (X, Y, Z, lvl, r, nc - 2, 0.0, 0.0, 1, true, mark);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	293 }
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	294
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	295 for (unsigned int r = 0; r < nr - 1; r++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	296 for (unsigned int c = 0; c < nc - 1; c++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	297 if (mark (r, c) > 0)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	298 drawcn (X, Y, Z, lvl, r, c, 0.0, 0.0, 255, true, mark);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	299 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	300
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14501 diff changeset	301 DEFUN (__contourc__, args, ,
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	302 doc: /* -- texinfo --
29278 7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	303 @deftypefn {} {@var{c} =} __contourc__ (@var{x}, @var{y}, @var{z}, @var{levels})
7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	304 Calculate Z-level contours (isolines).
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	305 @end deftypefn */)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	306 {
20802 8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	307 RowVector X = args(0).row_vector_value ();
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	308 RowVector Y = args(1).row_vector_value ();
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	309 Matrix Z = args(2).matrix_value ();
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	310 RowVector L = args(3).row_vector_value ();
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	311
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	312 contourc.resize (2, 0);
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	313
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	314 for (int i = 0; i < L.numel (); i++)
29278 7bfc454b9e08 contourc.m: Overhaul function. Rik <rik@octave.org> parents: 27923 diff changeset	315 cntr (X, Y, Z, L(i));
20802 8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	316
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	317 end_contour ();
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	318
8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20667 diff changeset	319 return octave_value (contourc);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	320 }
12805 3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	321
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	322 /*
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	323 ## No test needed for internal helper function.
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	324 %!assert (1)
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	325 */

Mercurial > octave

annotate libinterp/corefcn/__contourc__.cc @ 29359:7854d5752dd2

annotate libinterp/corefcn/contourc.cc @ 29359:7854d5752dd2