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maint: Update copyright dates.
author John W. Eaton <jwe@octave.org>
date Wed, 22 Feb 2017 12:39:29 -0500
parents e9a0469dedd9
children 092078913d54
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23219
3ac9f9ecfae5 maint: Update copyright dates.
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1 ## Copyright (C) 2007-2017 Michael Goffioul
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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 ## -*- texinfo -*-
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20 ## @deftypefn {} {} hidden
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21 ## @deftypefnx {} {} hidden on
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22 ## @deftypefnx {} {} hidden off
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23 ## @deftypefnx {} {@var{mode} =} hidden (@dots{})
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24 ## Control mesh hidden line removal.
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25 ##
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26 ## When called with no argument the hidden line removal state is toggled.
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27 ##
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28 ## When called with one of the modes @qcode{"on"} or @qcode{"off"} the state
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29 ## is set accordingly.
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30 ##
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31 ## The optional output argument @var{mode} is the current state.
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32 ##
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33 ## Hidden Line Removal determines what graphic objects behind a mesh plot
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34 ## are visible. The default is for the mesh to be opaque and lines behind
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35 ## the mesh are not visible. If hidden line removal is turned off then
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36 ## objects behind the mesh can be seen through the faces (openings) of the
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37 ## mesh, although the mesh grid lines are still opaque.
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38 ##
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39 ## @seealso{mesh, meshc, meshz, ezmesh, ezmeshc, trimesh, waterfall}
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40 ## @end deftypefn
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41
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42 function state = hidden (mode = "toggle")
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43
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44 if (nargin > 2)
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45 print_usage ();
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46 elseif (nargin == 1)
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47 if (! ischar (mode))
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48 error ("hidden: MODE must be a string");
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49 elseif (! any (strcmpi (mode, {"on", "off"})))
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50 error ('hidden: MODE must be "on" or "off"');
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51 endif
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52 endif
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53
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54 for h = (get (gca (), "children")).';
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55 htype = get (h, "type");
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56 htag = get (h, "tag");
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57 if (strcmp (htype, "surface") || strcmp (htag, "trimesh"))
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58 fc = get (h, "facecolor");
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59 if ((! ischar (fc) && is_white (fc))
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60 || (ischar (fc) && strcmp (fc, "none")))
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61 switch (mode)
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62 case "on"
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63 set (h, "facecolor", "w");
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64 case "off"
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65 set (h, "facecolor", "none");
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66 case "toggle"
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67 if (ischar (fc))
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68 set (h, "facecolor", "w");
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69 mode = "on";
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70 else
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71 set (h, "facecolor", "none");
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72 mode = "off";
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73 endif
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74 endswitch
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75 endif
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76 endif
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77 endfor
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78
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79 if (nargout > 0)
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80 state = mode;
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81 endif
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82
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83 endfunction
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84
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85 function retval = is_white (color)
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86 retval = all (color == 1);
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87 endfunction