mergeBoxes3d

MERGEBOXES3D Merge 3D boxes, by computing their greatest extent.

   BOX = mergeBoxes3d(BOX1, BOX2);

   Example
   box1 = [5 20 5 30 10 50];
   box2 = [0 15 0 15 0 20];
   mergeBoxes3d(box1, box2)
   ans = 
       0 20 0 30 0 50


   See also
   boxes3d, drawBox3d, intersectBoxes3d


 ------
 Author: David Legland
 e-mail: david.legland@grignon.inra.fr
 Created: 2010-07-26,    using Matlab 7.9.0.529 (R2009b)
 Copyright 2010 INRA - Cepia Software Platform.

0001 function box = mergeBoxes3d(box1, box2)
0002 %MERGEBOXES3D Merge 3D boxes, by computing their greatest extent.
0003 %
0004 %   BOX = mergeBoxes3d(BOX1, BOX2);
0005 %
0006 %   Example
0007 %   box1 = [5 20 5 30 10 50];
0008 %   box2 = [0 15 0 15 0 20];
0009 %   mergeBoxes3d(box1, box2)
0010 %   ans =
0011 %       0 20 0 30 0 50
0012 %
0013 %
0014 %   See also
0015 %   boxes3d, drawBox3d, intersectBoxes3d
0016 %
0017 %
0018 % ------
0019 % Author: David Legland
0020 % e-mail: david.legland@grignon.inra.fr
0021 % Created: 2010-07-26,    using Matlab 7.9.0.529 (R2009b)
0022 % Copyright 2010 INRA - Cepia Software Platform.
0023 
0024 % unify sizes of data
0025 if size(box1,1) == 1
0026     box1 = repmat(box1, size(box2,1), 1);
0027 elseif size(box2, 1) == 1
0028     box2 = repmat(box2, size(box1,1), 1);
0029 elseif size(box1,1) ~= size(box2,1)
0030     error('Bad size for inputs');
0031 end
0032 
0033 % compute extreme coords
0034 mini = min(box1(:,1:2:end), box2(:,1:2:end));
0035 maxi = max(box1(:,2:2:end), box2(:,2:2:end));
0036 
0037 % concatenate result into a new box structure
0038 box = [mini(:,1) maxi(:,1) mini(:,2) maxi(:,2) mini(:,3) maxi(:,3)];
0039