drawRect

DRAWRECT Draw rectangle on the current axis.
   
   drawRect(RECT)
   draws the rectangles defined by RECT = [X0 Y0 W H].
   the four corners of rectangle are then :
   (X0, Y0), (X0+W, Y0), (X0, Y0+H), (X0+W, Y0+H).

   RECT = [X0 Y0 W H THETA] also specifies orientation for the rectangle.
   Theta is given in degrees.

   If RECT is a N-by-4 or N-by-5 array, several rectangles are drawn.

   drawRect(..., PARAM, VALUE)
   Specifies one or several parameters name-value pairs, see plot function
   for details.

   drawRect(AX, ...) 
   Specifies the handle of the axis to draw the rectangle on.

   H = drawRect(...) 
   Returns handle of the created graphic objects.

   See Also:
   drawOrientedBox, drawBox, rectToPolygon

0001 function varargout = drawRect(rect, varargin)
0002 %DRAWRECT Draw rectangle on the current axis.
0003 %
0004 %   drawRect(RECT)
0005 %   draws the rectangles defined by RECT = [X0 Y0 W H].
0006 %   the four corners of rectangle are then :
0007 %   (X0, Y0), (X0+W, Y0), (X0, Y0+H), (X0+W, Y0+H).
0008 %
0009 %   RECT = [X0 Y0 W H THETA] also specifies orientation for the rectangle.
0010 %   Theta is given in degrees.
0011 %
0012 %   If RECT is a N-by-4 or N-by-5 array, several rectangles are drawn.
0013 %
0014 %   drawRect(..., PARAM, VALUE)
0015 %   Specifies one or several parameters name-value pairs, see plot function
0016 %   for details.
0017 %
0018 %   drawRect(AX, ...)
0019 %   Specifies the handle of the axis to draw the rectangle on.
0020 %
0021 %   H = drawRect(...)
0022 %   Returns handle of the created graphic objects.
0023 %
0024 %   See Also:
0025 %   drawOrientedBox, drawBox, rectToPolygon
0026 %
0027 
0028 %   ---------
0029 %   author : David Legland
0030 %   INRA - TPV URPOI - BIA IMASTE
0031 %   created the 10/12/2003.
0032 %
0033 
0034 %   HISTORY
0035 %   2003-12-12 add support for multiple rectangles
0036 %   2011-10-09 rewrite using rectToPolygon, add support for drawing options
0037 %   2011-10-11 add management of axes handle
0038 
0039 % extract handle of axis to draw on
0040 if isAxisHandle(rect)
0041     ax = rect;
0042     rect = varargin{1};
0043     varargin(1) = [];
0044 else
0045     ax = gca;
0046 end
0047 
0048 % number of rectangles to draw
0049 n = size(rect, 1);
0050 
0051 % display each rectangle
0052 r = zeros(n, 1);
0053 for i = 1:n
0054     % compute vertex corodinates
0055     poly = rectToPolygon(rect(i, :));
0056     % display resulting polygon
0057     r(i) = drawPolygon(ax, poly, varargin{:});
0058 end
0059 
0060 % process output
0061 if nargout > 0
0062     varargout = {r};
0063 end