octave: libinterp/corefcn/__contourc_

annotate libinterp/corefcn/contourc.cc @ 15867:704e15f8fecd

Modify contourc recursion to a loop to avoid stack overflow (bug #37891) * libinterp/corefcn/__contourc__.cc (drawcn): Convert recursion to an equivalent while loop.

author	Mike Miller <mtmiller@ieee.org>
date	Tue, 01 Jan 2013 14:55:31 -0500
parents	61822c866ba1
children	d63878346099

rev	line source
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	1 /* Contour lines for function evaluated on a grid.
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	2
14138 72c96de7a403 maint: update copyright notices for 2012 John W. Eaton <jwe@octave.org> parents: 12805 diff changeset	3 Copyright (C) 2007-2012 Kai Habel
7017 a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe] jwe parents: 7016 diff changeset	4 Copyright (C) 2004, 2007 Shai Ayal
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	5
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	6 Adapted to an oct file from the stand alone contourl by Victro Munoz
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	7 Copyright (C) 2004 Victor Munoz
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	8
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	9 Based on contour plot routine (plcont.c) in PLPlot package
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	10 http://plplot.org/
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	11
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	12 Copyright (C) 1995, 2000, 2001 Maurice LeBrun
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	13 Copyright (C) 2000, 2002 Joao Cardoso
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	14 Copyright (C) 2000, 2001, 2002, 2004 Alan W. Irwin
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	15 Copyright (C) 2004 Andrew Ross
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	16
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	17 This file is part of Octave.
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	18
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	19 Octave is free software; you can redistribute it and/or modify it
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	20 under the terms of the GNU General Public License as published by the
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6945 diff changeset	21 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6945 diff changeset	22 option) any later version.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	23
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	24 Octave is distributed in the hope that it will be useful, but WITHOUT
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	25 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	26 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	27 for more details.
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	28
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	29 You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6945 diff changeset	30 along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6945 diff changeset	31 <http://www.gnu.org/licenses/>.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	32
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	33 */
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	34
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	35 #ifdef HAVE_CONFIG_H
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	36 #include <config.h>
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	37 #endif
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	38
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	39 #include <cfloat>
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	40
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	41 #include "quit.h"
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	42
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14501 diff changeset	43 #include "defun.h"
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	44 #include "error.h"
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	45 #include "oct-obj.h"
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	46
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	47 static Matrix this_contour;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	48 static Matrix contourc;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	49 static int elem;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	50
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	51 // 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	52 #define CONTOUR_QUANT 50
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 // Add a coordinate point (x,y) to this_contour.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	55
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	56 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	57 add_point (double x, double y)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	58 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	59 if (elem % CONTOUR_QUANT == 0)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	60 this_contour = this_contour.append (Matrix (2, CONTOUR_QUANT, 0));
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	61
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	62 this_contour (0, elem) = x;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	63 this_contour (1, elem) = y;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	64 elem++;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	65 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	66
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	67 // Add contents of current contour to contourc.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	68 // this_contour.cols () - 1;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	69
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	70 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	71 end_contour (void)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	72 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	73 if (elem > 2)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	74 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	75 this_contour (1, 0) = elem - 1;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	76 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	77 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	78
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	79 this_contour = Matrix ();
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	80 elem = 0;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	81 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	82
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	83 // 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	84
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	85 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	86 start_contour (double lvl, double x, double y)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	87 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	88 end_contour ();
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	89 this_contour.resize (2, 0);
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	90 add_point (lvl, 0);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	91 add_point (x, y);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	92 }
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 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	95 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	96 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	97 unsigned int start_edge, bool first, charMatrix& mark)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	98 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	99 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	100 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	101
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	102 // 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	103 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	104 && 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	105 {
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	106
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	107 //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	108 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	109 px[1] = px[2] = X(c+1);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	110
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	111 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	112 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	113
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	114 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	115 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	116 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	117 pz[0] = Z(r, c) - lvl;
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	118
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	119 // 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	120 //
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	121 // 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	122 // \| \| \| \|
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	123 // \| \| 3 1
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	124 // \| \| \| \|
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	125 // 3-----2 .-2-.
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	126
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	127 // 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	128 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	129
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	130 // 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	131 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	132 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	133 // 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	134 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	135 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	136 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	137 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	138
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	139 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	140 break;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	141
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	142 // 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	143 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	144
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	145 // 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	146 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	147 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	148
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	149 // 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	150 if (first)
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	151 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	152 tmp = fabs (pz[pt[1]]) / fabs (pz[pt[0]]);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	153
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	154 if (xisnan (tmp))
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	155 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	156 else
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	157 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	158 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	159 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	160 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	161
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	162 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	163 first = false;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	164 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	165
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	166 // Find stop edge.
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	167 // FIXME -- perhaps this should use a while loop?
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	168 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	169 {
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	170 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	171 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	172 else
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	173 stop_edge = (start_edge - k) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	174
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	175 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	176 break;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	177 }
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 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	180 pt[1] = (pt[0] + 1) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	181 tmp = fabs (pz[pt[1]]) / fabs (pz[pt[0]]);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	182
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	183 if (xisnan (tmp))
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	184 ct_x = ct_y = 0.5;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	185 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	186 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	187 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	188 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	189 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	190
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	191 // 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	192 add_point (ct_x, ct_y);
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	193
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	194 // 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	195 mark(r, c) -= static_cast<char> (1 << stop_edge);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	196
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	197 // 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	198 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	199 r--;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	200 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	201 c++;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	202 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	203 r++;
704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	204 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	205 c--;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	206
15867 704e15f8fecd Modify contourc recursion to a loop to avoid stack overflow (bug #37891) Mike Miller <mtmiller@ieee.org> parents: 15220 diff changeset	207 // 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	208 start_edge = (stop_edge + 2) % 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	209
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	210 }
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 static void
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	214 mark_facets (const Matrix& Z, charMatrix& mark, double lvl)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	215 {
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	216 unsigned int nr = mark.rows ();
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	217 unsigned int nc = mark.cols ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	218
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	219 double f[4];
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	220
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	221 for (unsigned int c = 0; c < nc; c++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	222 for (unsigned int r = 0; r < nr; r++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	223 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	224 f[0] = Z(r, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	225 f[1] = Z(r, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	226 f[3] = Z(r+1, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	227 f[2] = Z(r+1, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	228
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	229 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	230 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	231 f[i] = std::numeric_limits<double>::epsilon ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	232
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	233 if (f[1] * f[2] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	234 mark(r, c) += 2;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	235
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	236 if (f[0] * f[3] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	237 mark(r, c) += 8;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	238 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	239
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	240 for (unsigned int r = 0; r < nr; r++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	241 for (unsigned int c = 0; c < nc; c++)
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	242 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	243 f[0] = Z(r, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	244 f[1] = Z(r, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	245 f[3] = Z(r+1, c) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	246 f[2] = Z(r+1, c+1) - lvl;
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	247
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	248 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	249 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	250 f[i] = std::numeric_limits<double>::epsilon ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	251
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	252 if (f[0] * f[1] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	253 mark(r, c) += 1;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	254
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	255 if (f[2] * f[3] < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	256 mark(r, c) += 4;
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	257 }
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 static void
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	261 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	262 {
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	263 unsigned int nr = Z.rows ();
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	264 unsigned int nc = Z.cols ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	265
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	266 charMatrix mark (nr - 1, nc - 1, 0);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	267
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	268 mark_facets (Z, mark, lvl);
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	269
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	270 // Find contours that start at a domain edge.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	271
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	272 for (unsigned int c = 0; c < nc - 1; c++)
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	273 {
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	274 // Top.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	275 if (mark(0, c) & 1)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	276 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	277
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	278 // Bottom.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	279 if (mark(nr - 2, c) & 4)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	280 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	281 }
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	282
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	283 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	284 {
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	285 // Left.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	286 if (mark(r, 0) & 8)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	287 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	288
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	289 // Right.
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	290 if (mark(r, nc - 2) & 2)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	291 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	292 }
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	293
7070 7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	294 for (unsigned int r = 0; r < nr - 1; r++)
7593f8e83a2e [project @ 2007-10-25 20:41:16 by jwe] jwe parents: 7042 diff changeset	295 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	296 if (mark (r, c) > 0)
e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	297 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	298 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	299
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14501 diff changeset	300 DEFUN (__contourc__, args, ,
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	301 "-- texinfo --\n\
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14501 diff changeset	302 @deftypefn {Built-in Function} {} __contourc__ (@var{x}, @var{y}, @var{z}, @var{levels})\n\
6945 6bbf56a9718a [project @ 2007-10-02 20:47:22 by jwe] jwe parents: 6257 diff changeset	303 Undocumented internal function.\n\
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	304 @end deftypefn")
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	305 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	306 octave_value retval;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	307
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	308 if (args.length () == 4)
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	309 {
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	310 RowVector X = args (0).row_vector_value ();
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	311 RowVector Y = args (1).row_vector_value ();
7042 e54cc03d53f6 [project @ 2007-10-19 20:43:32 by jwe] jwe parents: 7017 diff changeset	312 Matrix Z = args (2).matrix_value ();
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	313 RowVector L = args (3).row_vector_value ();
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	314
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	315 if (! error_state)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	316 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	317 contourc.resize (2, 0);
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	318
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	319 for (int i = 0; i < L.length (); i++)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	320 cntr (X, Y, Z, L (i));
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	321
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	322 end_contour ();
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	323
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	324 retval = contourc;
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	325 }
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	326 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 8920 diff changeset	327 error ("__contourc__: invalid argument values");
6257 44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	328 }
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	329 else
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	330 print_usage ();
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	331
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	332 return retval;
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe] jwe parents: diff changeset	333 }
12805 3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	334
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	335 /*
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	336 ## 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	337 %!assert (1)
3641167e5b75 codesprint: .cc helper functions do not need tests Rik <octave@nomad.inbox5.com>* parents: 11586 diff changeset	338 */

Mercurial > octave

annotate libinterp/corefcn/__contourc__.cc @ 15867:704e15f8fecd

annotate libinterp/corefcn/contourc.cc @ 15867:704e15f8fecd