/usr/share/octave/packages/geometry-1.7.0/geom2d/mergeBoxes.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.
##
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## modification, are permitted provided that the following conditions are met:
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## -*- texinfo -*-
## @deftypefn {Function File} {@var{box} =} mergeBoxes (@var{box1}, @var{box2})
## Merge two boxes, by computing their greatest extent.
##
# Example
##
## @example
## box1 = [5 20 5 30];
## box2 = [0 15 0 15];
## mergeBoxes(box1, box2)
## ans =
## 0 20 0 30
## @end example
##
## @seealso{boxes2d, drawBox, intersectBoxes}
## @end deftypefn
function bb = mergeBoxes(box1, box2)
# unify sizes of data
if size(box1,1) == 1
box1 = repmat(box1, size(box2,1), 1);
elseif size(box2, 1) == 1
box2 = repmat(box2, size(box1,1), 1);
elseif size(box1,1) != size(box2,1)
error('geom2d:Error', 'Bad size for inputs');
end
# compute extreme coords
mini = min(box1(:,[1 3]), box2(:,[1 3]));
maxi = max(box1(:,[2 4]), box2(:,[2 4]));
# concatenate result into a new box structure
bb = [mini(:,1) maxi(:,1) mini(:,2) maxi(:,2)];
endfunction
%!test
%! box1 = [5 20 10 25];
%! box2 = [0 15 15 20];
%! res = [0 20 10 25];
%! bb = mergeBoxes(box1, box2);
%! assert (res, bb, 1e-6);
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