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100 lines
2.9 KiB
100 lines
2.9 KiB
%PLOT_BOX Draw a box on the current plot
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%
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% PLOT_BOX(B, LS) draws a box defined by B=[XL XR; YL YR] with optional Matlab
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% linestyle options LS.
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%
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% PLOT_BOX(X1,Y1, X2,Y2, LS) draws a box with corners at (X1,Y1) and (X2,Y2),
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% and optional Matlab linestyle options LS.
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%
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% PLOT_BOX('centre', P, 'size', W, LS) draws a box with center at P=[X,Y] and
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% with dimensions W=[WIDTH HEIGHT].
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%
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% PLOT_BOX('topleft', P, 'size', W, LS) draws a box with top-left at P=[X,Y]
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% and with dimensions W=[WIDTH HEIGHT].
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% Options::
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% 'size',SZ Specify size of box. SZ=[WIDTH, HEIGHT] or if scalar then
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% WIDTH=HEIGHT=SZ
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% 'topleft',P Specify position of box by top left coordinate P
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% 'centre',P Specify position of box by centre coordinate P
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%
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% Additional options LS are passed to PLOT.
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%
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% See also plot.
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% Copyright (C) 1995-2009, by Peter I. Corke
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%
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% This file is part of The Machine Vision Toolbox for Matlab (MVTB).
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%
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% MVTB is free software: you can redistribute it and/or modify
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% it under the terms of the GNU Lesser General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% MVTB is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU Lesser General Public License for more details.
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%
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% You should have received a copy of the GNU Leser General Public License
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% along with MVTB. If not, see <http://www.gnu.org/licenses/>.
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function plot_box(varargin)
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opt.centre = [];
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opt.topleft = [];
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opt.size = [];
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[opt,varargin] = tb_optparse(opt, varargin);
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if ~isempty(opt.size)
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if size(opt.size) == 1
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w = opt.size;
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h = opt.size;
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else
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w = opt.size(1);
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h = opt.size(2);
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end
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if ~isempty(opt.centre)
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x1 = round(opt.centre(1)-w/2);
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y1 = round(opt.centre(2)-h/2);
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x2 = round(opt.centre(1)+w/2);
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y2 = round(opt.centre(2)+h/2);
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elseif ~isempty(opt.topleft)
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x1 = opt.topleft(1);
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y1 = opt.topleft(2);
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x2 = x1 + w;
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y2 = x1 + h;
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else
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error('must specify top left or centre');
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end
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else
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if all(size(varargin{1}) == [2 2])
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% first arg is a box
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b = varargin{1};
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x1 = b(1); y1 = b(2);
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x2 = b(3); y2 = b(4);
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varargin = varargin(2:end);
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else
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% use first 4 args as x1 y1 x2 y2
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x1 = varargin{1};
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y1 = varargin{2};
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x2 = varargin{3};
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y2 = varargin{4};
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varargin = varargin(5:end);
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end
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end
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p = [ x1 y1
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x2 y1
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x2 y2
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x1 y2
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x1 y1 ];
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holdon = ishold;
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hold on
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plot(p(:,1), p(:,2), varargin{:})
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if holdon == 0
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hold off
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end
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