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1 ## Copyright (C) 2007 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} __next_line_color__ (@var{reset}) |
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22 ## Return the next line color in the rotation. |
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23 ## @end deftypefn |
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24 |
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25 ## Author: jwe |
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26 |
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27 function rgb = __next_line_color__ (reset) |
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28 |
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29 persistent color_rotation = [ 0, 0, 1; |
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30 0, 0.5, 0; |
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31 1, 0, 0; |
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32 0, 0.75, 0.75; |
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33 0.75, 0, 0.75; |
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34 0.75, 0.75, 0; |
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35 0.25, 0.25, 0.25]; |
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36 |
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37 persistent num_colors = rows (color_rotation); |
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38 persistent color_index = 1; |
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39 |
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40 if (nargin < 2) |
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41 if (nargin == 1 && reset) |
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42 color_index = 1; |
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43 else |
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44 color_index |
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45 rgb = color_rotation(color_index,:) |
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46 if (++color_index > num_colors) |
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47 color_index = 1; |
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48 endif |
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49 endif |
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50 else |
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51 print_usage (); |
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52 endif |
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53 |
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54 endfunction |
