Mercurial > hg > octave-nkf
annotate scripts/plot/rectangle.m @ 17302:6ba5b1dadd61
plotmatrix.m: Replace ifelse() construction with if/endif.
* scripts/plot/plotmatrix.m: Replace ifelse() construction with if/endif.
Move argument return out of unwind_protect to end of function.
| author | Rik <rik@octave.org> |
|---|---|
| date | Tue, 20 Aug 2013 22:35:08 -0700 |
| parents | 68bcac3c043a |
| children |
| rev | line source |
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1 ## Copyright (C) 2012 David Bateman |
| 12697 | 2 ## |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7 ## the Free Software Foundation; either version 3 of the License, or (at | |
| 8 ## your option) any later version. | |
| 9 ## | |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 16 ## along with Octave; see the file COPYING. If not, see | |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 18 | |
| 19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {} rectangle () |
| 12697 | 21 ## @deftypefnx {Function File} {} rectangle (@dots{}, "Position", @var{pos}) |
| 22 ## @deftypefnx {Function File} {} rectangle (@dots{}, "Curvature", @var{curv}) | |
| 23 ## @deftypefnx {Function File} {} rectangle (@dots{}, "EdgeColor", @var{ec}) | |
| 24 ## @deftypefnx {Function File} {} rectangle (@dots{}, "FaceColor", @var{fc}) | |
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25 ## @deftypefnx {Function File} {} rectangle (@var{hax}, @dots{}) |
| 12697 | 26 ## @deftypefnx {Function File} {@var{h} =} rectangle (@dots{}) |
| 27 ## | |
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28 ## Draw a rectangular patch defined by @var{pos} and @var{curv}. |
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29 ## |
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30 ## The variable @code{@var{pos}(1:2)} defines the lower left-hand corner of |
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31 ## the patch and @code{@var{pos}(3:4)} defines its width and height. By |
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32 ## default, the value of @var{pos} is @code{[0, 0, 1, 1]}. |
| 12697 | 33 ## |
| 34 ## The variable @var{curv} defines the curvature of the sides of the rectangle | |
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35 ## and may be a scalar or two-element vector with values between 0 and 1. |
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36 ## A value of 0 represents no curvature of the side, whereas a value of 1 |
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37 ## means that the side is entirely curved into the arc of a circle. |
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38 ## If @var{curv} is a two-element vector, then the first element is the |
| 12697 | 39 ## curvature along the x-axis of the patch and the second along y-axis. |
| 40 ## | |
| 41 ## If @var{curv} is a scalar, it represents the curvature of the shorter of the | |
| 42 ## two sides of the rectangle and the curvature of the other side is defined | |
| 43 ## by | |
| 44 ## | |
| 45 ## @example | |
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46 ## min (pos (1:2)) / max (pos (1:2)) * curv |
| 12697 | 47 ## @end example |
| 48 ## | |
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49 ## Additional property/value pairs are passed to the underlying patch command. |
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50 ## |
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51 ## If the first argument @var{hax} is an axes handle, then plot into this axis, |
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52 ## rather than the current axes returned by @code{gca}. |
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53 ## |
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54 ## The optional return value @var{h} is a graphics handle to the created |
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55 ## rectangle object. |
| 12697 | 56 ## @end deftypefn |
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57 ## @seealso{patch, line, cylinder, ellipsoid, sphere} |
| 12697 | 58 |
| 59 function h = rectangle (varargin) | |
| 60 | |
| 61 [hax, varargin] = __plt_get_axis_arg__ ("rectangle", varargin{:}); | |
| 62 | |
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63 oldfig = []; |
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64 if (! isempty (hax)) |
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65 oldfig = get (0, "currentfigure"); |
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66 endif |
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67 unwind_protect |
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68 hax = newplot (hax); |
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69 |
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70 htmp = __rectangle__ (hax, varargin{:}); |
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71 unwind_protect_cleanup |
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72 if (! isempty (oldfig)) |
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73 set (0, "currentfigure", oldfig); |
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74 endif |
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75 end_unwind_protect |
| 12697 | 76 |
| 77 if (nargout > 0) | |
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78 h = htmp; |
| 12697 | 79 endif |
| 80 endfunction | |
| 81 | |
| 82 function hg = __rectangle__ (hax, varargin) | |
| 83 | |
| 84 iarg = 1; | |
| 85 pos = [0, 0, 1, 1]; | |
| 86 curv2 = [0, 0]; | |
| 87 ec = [0, 0, 0]; | |
| 88 fc = "none"; | |
| 89 | |
| 90 while (iarg < length (varargin)) | |
| 91 arg = varargin{iarg}; | |
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92 if (ischar (arg)) |
| 12697 | 93 if (strcmpi (arg, "position")) |
| 94 pos = varargin{iarg+1}; | |
| 95 varargin(iarg:iarg+1) = []; | |
| 96 if (!isvector (pos) || numel (pos) != 4) | |
| 97 error ("rectangle: position must be a 4 element vector"); | |
| 98 endif | |
| 99 elseif (strcmpi (arg, "curvature")) | |
| 100 curv2 = varargin{iarg+1}; | |
| 101 varargin(iarg:iarg+1) = []; | |
| 102 if (!isnumeric (curv2) || (numel (curv2) != 1 && numel (curv2) != 2)) | |
| 103 error ("rectangle: curvature must be a 2 element vector or a scalar"); | |
| 104 endif | |
| 105 if (any (curv2 < 0) || any (curv2 > 1)) | |
| 106 error ("rectangle: curvature values must be between 0 and 1"); | |
| 107 endif | |
| 108 elseif (strcmpi (arg, "edgecolor")) | |
| 109 ec = varargin{iarg+1}; | |
| 110 varargin(iarg:iarg+1) = []; | |
| 111 elseif (strcmpi (arg, "facecolor")) | |
| 112 fc = varargin{iarg+1}; | |
| 113 varargin(iarg:iarg+1) = []; | |
| 114 else | |
| 115 iarg ++; | |
| 116 endif | |
| 117 else | |
| 118 iarg ++; | |
| 119 endif | |
| 120 endwhile | |
| 121 | |
| 122 if (numel (curv2) == 1) | |
| 123 [a, ai] = min (pos (3 : 4)); | |
| 124 [b, bi] = max (pos (3 : 4)); | |
| 125 if (ai < bi) | |
| 126 curv = [curv2, curv2 .* a ./ b]; | |
| 127 else | |
| 128 curv = [curv2 .* a ./ b, curv2]; | |
| 129 endif | |
| 130 else | |
| 131 curv = curv2; | |
| 132 endif | |
| 133 | |
| 134 if (all (curv) < 0.01) | |
| 135 ## Special case : no curvature | |
| 136 x = [pos(1), pos(1) + pos(3), pos(1) + pos(3), pos(1), pos(1)]; | |
| 137 y = [pos(2), pos(2), pos(2) + pos(4), pos(2) + pos(4), pos(2)]; | |
| 138 else | |
| 139 p = pi / 2 * [0 : 15] / 15; | |
| 140 c = curv .* pos(3 : 4) / 2; | |
| 141 cx = c(1) * sin (p) - c(1); | |
| 142 cy = c(2) * cos (p) - c(2); | |
| 143 x = [pos(1) - fliplr(cx), pos(1) + pos(3) + cx, ... | |
| 144 pos(1) + pos(3) + fliplr(cx), pos(1) - cx, pos(1)]; | |
| 145 y = [pos(2) - fliplr(cy), pos(2) - cy, pos(2) + pos(4) + fliplr(cy), ... | |
| 146 pos(2) + pos(4) + cy, pos(2) + c(2)]; | |
| 147 endif | |
| 148 | |
| 149 hg = hggroup (); | |
| 150 | |
| 151 h = patch ("xdata", x(:), "ydata", y(:), "facecolor", fc, "edgecolor", ec, ... | |
| 152 "parent", hg, varargin{:}); | |
| 153 | |
| 154 addproperty ("curvature", hg, "data", curv2); | |
| 155 addproperty ("position", hg, "data", pos); | |
| 156 addproperty ("edgecolor", hg, "patchedgecolor", get (h, "edgecolor")); | |
| 157 addproperty ("linewidth", hg, "patchlinewidth", get (h, "linewidth")); | |
| 158 addproperty ("linestyle", hg, "patchlinestyle", get (h, "linestyle")); | |
| 159 addproperty ("facecolor", hg, "patchfacecolor", get (h, "facecolor")); | |
| 160 | |
| 161 addlistener (hg, "curvature", @update_data); | |
| 162 addlistener (hg, "position", @update_data); | |
| 163 addlistener (hg, "edgecolor", @update_props); | |
| 164 addlistener (hg, "linewidth", @update_props); | |
| 165 addlistener (hg, "linestyle", @update_props); | |
| 166 addlistener (hg, "facecolor", @update_props); | |
| 167 endfunction | |
| 168 | |
| 169 function update_data (h, d) | |
| 170 persistent recursion = false; | |
| 171 | |
| 172 ## Don't allow recursion | |
| 173 if (!recursion) | |
| 174 unwind_protect | |
| 175 recursion = true; | |
| 176 | |
| 177 kids = get (h, "children"); | |
| 178 pos = get (h, "position"); | |
| 179 curv2 = get (h, "curvature"); | |
| 180 | |
| 181 if (numel (curv2) == 1) | |
| 182 [a, ai] = min (pos (3 : 4)); | |
| 183 [b, bi] = max (pos (3 : 4)); | |
| 184 if (ai < bi) | |
| 185 curv = [curv2, curv2 .* a ./ b]; | |
| 186 else | |
| 187 curv = [curv2 .* a ./ b, curv2]; | |
| 188 endif | |
| 189 else | |
| 190 curv = curv2; | |
| 191 endif | |
| 192 | |
| 193 if (all (curv) < 0.01) | |
| 194 ## Special case : no curvature | |
| 195 x = [pos(1), pos(1) + pos(3), pos(1) + pos(3), pos(1), pos(1)]; | |
| 196 y = [pos(2), pos(2), pos(2) + pos(4), pos(2) + pos(4), pos(2)]; | |
| 197 else | |
| 198 p = pi / 2 * [0 : 15] / 15; | |
| 199 c = curv .* pos(3 : 4) / 2; | |
| 200 cx = c(1) * sin (p) - c(1); | |
| 201 cy = c(2) * cos (p) - c(2); | |
| 202 x = [pos(1) - fliplr(cx), pos(1) + pos(3) + cx, ... | |
| 203 pos(1) + pos(3) + fliplr(cx), pos(1) - cx, pos(1)]; | |
| 204 y = [pos(2) - fliplr(cy), pos(2) - cy, pos(2) + pos(4) + fliplr(cy), ... | |
| 205 pos(2) + pos(4) + cy, pos(2) + c(2)]; | |
| 206 endif | |
| 207 | |
| 208 set (kids, "xdata", x, "ydata", y); | |
| 209 unwind_protect_cleanup | |
| 210 recursion = false; | |
| 211 end_unwind_protect | |
| 212 endif | |
| 213 endfunction | |
| 214 | |
| 215 function update_props (h, d) | |
| 216 kids = get (h, "children"); | |
| 217 set (kids, "edgecolor", get (h, "edgecolor"), | |
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218 "linewidth", get (h, "linewidth"), |
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219 "linestyle", get (h, "linestyle"), |
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220 "facecolor", get (h, "facecolor")); |
| 12697 | 221 endfunction |
| 222 | |
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223 |
| 12697 | 224 %!demo |
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225 %! clf; |
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226 %! axis equal; |
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227 %! rectangle ('Position', [0.05, 0.05, 0.9, 0.9], 'Curvature', [0.5, 0.5]); |
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228 %! title ('rectangle() with corners curved'); |
| 12697 | 229 |
| 230 %!demo | |
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231 %! clf; |
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232 %! axis equal; |
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233 %! rectangle ('Position', [0.05, 0.05, 0.9, 0.4], 'Curvature', 1.0); |
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234 %! title ('rectangle() with sides as complete arcs'); |
| 12697 | 235 |
| 236 %!demo | |
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237 %! clf; |
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238 %! axis equal; |
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239 %! h = rectangle ('Position', [0.05, 0.05, 0.9, 0.4], 'Curvature', 1.0); |
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240 %! set (h, 'FaceColor', [0, 1, 0]); |
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241 %! title ('rectangle() with FaceColor = green'); |
| 12697 | 242 |