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1 ## Copyright (C) 2007 David Bateman |
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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 3 of the License, or (at |
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8 ## your option) 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, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## Undocumented internal function. |
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20 |
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21 function [c, h] = __contour__ (varargin) |
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22 |
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23 ax = varargin {1}; |
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24 z = varargin {2}; |
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25 |
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26 clim = get (ax, "clim"); |
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27 |
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28 [c, lev] = contourc (varargin{3:end}); |
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29 |
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30 ## Decode contourc output format. |
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31 i1 = 1; |
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32 h = []; |
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33 maxlev = max (lev); |
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34 minlev = min (lev); |
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35 while (i1 < length (c)) |
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36 clev = c(1,i1); |
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37 clen = c(2,i1); |
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38 |
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39 ii = i1+1:i1+clen; |
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40 lev = (clev - minlev) * (clim(2) - clim(1)) / (maxlev - minlev) + clim(1); |
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41 |
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42 if (isnan (z)) |
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43 h = [h; patch(ax, c(1,ii), c(2,ii), "facecolor", "none", |
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44 "edgecolor", "flat", "cdata", lev)]; |
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45 else |
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46 h = [h; patch(ax, c(1,ii), c(2,ii), z*ones(size(ii)), "facecolor", |
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47 "none", "edgecolor", "flat", "cdata", lev)]; |
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48 endif |
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49 i1 += clen+1; |
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50 endwhile |
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51 |
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52 endfunction |
