Mercurial > hg > octave-lyh

annotate scripts/image/bone.m @ 6791:be31a048c449

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
[project @ 2007-07-24 19:04:51 by dbateman]
author dbateman
date Tue, 24 Jul 2007 19:04:51 +0000
parents c81a0f3f5a82
children 93c65f2a5668
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
1 ## Copyright (C) 1999,2000 Kai Habel
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
2 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
3 ## This file is part of Octave.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
4 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
6 ## under the terms of the GNU General Public License as published by
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
7 ## the Free Software Foundation; either version 2, or (at your option)
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
8 ## any later version.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
9 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
13 ## General Public License for more details.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
14 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
16 ## along with Octave; see the file COPYING. If not, write to the Free
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
18 ## 02110-1301, USA.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
19
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
20 ## -*- texinfo -*-
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
21 ## @deftypefn {Function File} {} bone (@var{n})
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
22 ## Create color colormap. This colormap is a gray colormap with a light
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
23 ## blue tone. The argument @var{n} should be a scalar. If it
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
24 ## is omitted, the length of the current colormap or 64 is assumed.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
25 ## @seealso{colormap}
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
26 ## @end deftypefn
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
27
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
28 ## Author: Kai Habel <kai.habel@gmx.de>
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
29
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
30 function map = bone (number)
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
31
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
32 if (nargin == 0)
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
33 number = rows (colormap);
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
34 elseif (nargin == 1)
6791
be31a048c449 [project @ 2007-07-24 19:04:51 by dbateman]
dbateman
parents: 6788
diff changeset
35 if (! isscalar (number))
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
36 error ("bone: argument must be a scalar");
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
37 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
38 else
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
39 print_usage ();
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
40 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
41
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
42 if (number == 1)
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
43 map = [0, 0, 0];
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
44 elseif (number > 1)
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
45 x = linspace (0, 1, number)';
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
46
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
47 r = (x < 3/4) .* (7/8 * x) + (x >= 3/4) .* (11/8 * x - 3/8);
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
48 g = (x < 3/8) .* (7/8 * x)\
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
49 + (x >= 3/8 & x < 3/4) .* (29/24 * x - 1/8)\
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
50 + (x >= 3/4) .* (7/8 * x + 1/8);
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
51 b = (x < 3/8) .* (29/24 * x) + (x >= 3/8) .* (7/8 * x + 1/8);
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
52 map = [r, g, b];
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
53 else
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
54 map = [];
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
55 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
56 endfunction