/usr/share/octave/packages/geometry-1.7.0/geom2d/randomPointInBox.m is in octave-geometry 1.7.0-1build1.
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## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1 Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
## 2 Redistributions in binary form must reproduce the above copyright
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## -*- texinfo -*-
## @deftypefn {Function File} {@var{points} =} randomPointInBox (@var{box})
## @deftypefnx {Function File} {@var{points} =} randomPointInBox (@var{box}, @var{n})
## Generate random points within a box.
##
## Generate a random point within the box @var{box}. The result is a 1-by-2 row
## vector. If @var{n} is given, generates @var{n} points. The result is a
## @var{n}-by-2 array.
##
## Example
##
## @example
## # draw points within a box
## box = [10 80 20 60];
## pts = randomPointInBox(box, 500);
## figure(1); clf; hold on;
## drawBox(box);
## drawPoint(pts, '.');
## axis('equal');
## axis([0 100 0 100]);
## @end example
##
## @seealso{edges2d, boxes2d, clipLine}
## @end deftypefn
function points = randomPointInBox(box, N=1, varargin)
# extract box bounds
xmin = box(1);
xmax = box(2);
ymin = box(3);
ymax = box(4);
# compute size of box
dx = xmax - xmin;
dy = ymax - ymin;
# compute point coordinates
points = [rand(N, 1)*dx+xmin , rand(N, 1)*dy+ymin];
endfunction
%!demo
%! # draw points within a box
%! bb = [10 80 20 60];
%! pts = randomPointInBox(bb, 500);
%! figure(1); clf; hold on;
%! drawBox(bb);
%! drawPoint(pts, '.');
%! axis equal
%! axis([0 100 0 100]);
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