1## Copyright (C) 2021 David Legland
2## All rights reserved.
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5## modification, are permitted provided that the following conditions are met:
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27
28function d = isPlane(plane)
29%ISPLANE Check if input is a plane.
30%
31%   B = isPlane(PLANE) where PLANE should be a plane or multiple planes
32%
33%   Example
34%     isPlane([...
35%         0 0 0 1 0 0 0 1 0;...
36%         0 0 0 1 0 0 -1 0 0;...
37%         0 0 0 1i 0 0 -1 0 0;...
38%         0 0 0 nan 0 0 0 1 0;...
39%         0 0 0 inf 0 0 0 1 0])
40%
41%   See also
42%   createPlane3d
43%
44% ------
45% Author: oqilipo
46% Created: 2017-07-09
47% Copyright 2017
48
49narginchk(1,1)
50
51if size(plane,2)~=9
52    d=false(size(plane,1),1);
53    return
54end
55
56a = ~any(isnan(plane),2);
57b = ~any(isinf(plane),2);
58c = ~isParallel3d(plane(:,4:6), plane(:,7:9));
59
60d = a & b & c;
61
62end
63