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1 ## Copyright (C) 2005, 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 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 {Function File} {} patch () |
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21 ## @deftypefnx {Function File} {} patch (@var{x}, @var{y}, @var{c}) |
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22 ## @deftypefnx {Function File} {} patch (@var{x}, @var{y}, @var{c}, @var{opts}) |
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23 ## @deftypefnx {Function File} {} patch ('Faces', @var{f}, 'Vertices', @var{v}, @dots{}) |
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24 ## @deftypefnx {Function File} {} patch (@dots{}, @var{prop}, @var{val}) |
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25 ## @deftypefnx {Function File} {} patch (@var{h}, @dots{}) |
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26 ## @deftypefnx {Function File} {@var{h} = } patch (@dots{}) |
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27 ## Create patch object from @var{x} and @var{y} with color @var{c} and |
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28 ## insert in the current axes object. Return handle to patch object. |
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29 ## |
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30 ## For a uniform colored patch, @var{c} can be given as an RGB vector, |
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31 ## scalar value referring to the current colormap, or string value (for |
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32 ## example, "r" or "red"). |
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33 ## @end deftypefn |
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34 |
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35 ## Author: jwe |
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36 |
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37 function h = patch (varargin) |
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38 |
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39 if (isscalar (varargin{1}) && ishandle (varargin{1})) |
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40 h = varargin{1}; |
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41 if (! strcmp (get (h, "type"), "axes") && ! strcmp (get (h, "type"), "hggroup")) |
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42 error ("patch: expecting first argument to be an axes or hggroup object"); |
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43 endif |
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44 oldh = gca (); |
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45 unwind_protect |
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46 axes (ancestor (h, "axes")); |
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47 [tmp, fail] = __patch__ (h, varargin{2:end}); |
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48 unwind_protect_cleanup |
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49 axes (oldh); |
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50 end_unwind_protect |
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51 else |
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52 [tmp, fail] = __patch__ (gca (), varargin{:}); |
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53 endif |
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54 |
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55 if (fail) |
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56 print_usage (); |
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57 endif |
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58 |
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59 if (nargout > 0) |
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60 h = tmp; |
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61 endif |
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62 |
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63 endfunction |
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64 |
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65 %!demo |
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66 %! ## Patches with same number of vertices |
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67 %! close all; |
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68 %! t1 = (1/16:1/8:1)'*2*pi; |
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69 %! t2 = ((1/16:1/8:1)' + 1/32)*2*pi; |
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70 %! x1 = sin(t1) - 0.8; |
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71 %! y1 = cos(t1); |
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72 %! x2 = sin(t2) + 0.8; |
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73 %! y2 = cos(t2); |
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74 %! patch([x1,x2],[y1,y2],'r'); |
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75 |
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76 %!demo |
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77 %! ## Unclosed patch |
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78 %! close all; |
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79 %! t1 = (1/16:1/8:1)'*2*pi; |
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80 %! t2 = ((1/16:1/16:1)' + 1/32)*2*pi; |
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81 %! x1 = sin(t1) - 0.8; |
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82 %! y1 = cos(t1); |
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83 %! x2 = sin(t2) + 0.8; |
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84 %! y2 = cos(t2); |
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85 %! patch([[x1;NaN(8,1)],x2],[[y1;NaN(8,1)],y2],'r'); |
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86 |
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87 %!demo |
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88 %! ## Specify vertices and faces separately |
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89 %! close all; |
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90 %! t1 = (1/16:1/8:1)'*2*pi; |
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91 %! t2 = ((1/16:1/16:1)' + 1/32)*2*pi; |
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92 %! x1 = sin(t1) - 0.8; |
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93 %! y1 = cos(t1); |
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94 %! x2 = sin(t2) + 0.8; |
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95 %! y2 = cos(t2); |
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96 %! vert = [x1, y1; x2, y2]; |
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97 %! fac = [1:8,NaN(1,8);9:24]; |
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98 %! patch('Faces',fac,'Vertices',vert,'FaceColor','r'); |
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99 |
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100 %!demo |
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101 %! ## Property change on multiple patches |
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102 %! close all; |
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103 %! t1 = (1/16:1/8:1)'*2*pi; |
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104 %! t2 = ((1/16:1/8:1)' + 1/32)*2*pi; |
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105 %! x1 = sin(t1) - 0.8; |
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106 %! y1 = cos(t1); |
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107 %! x2 = sin(t2) + 0.8; |
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108 %! y2 = cos(t2); |
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109 %! h = patch([x1,x2],[y1,y2],cat (3,[0,0],[1,0],[0,1])); |
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110 %! pause (1); |
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111 %! set (h, 'FaceColor', 'r'); |
