1## Copyright (C) 2021 David Legland 2## All rights reserved. 3## 4## Redistribution and use in source and binary forms, with or without 5## modification, are permitted provided that the following conditions are met: 6## 7## 1 Redistributions of source code must retain the above copyright notice, 8## this list of conditions and the following disclaimer. 9## 2 Redistributions in binary form must reproduce the above copyright 10## notice, this list of conditions and the following disclaimer in the 11## documentation and/or other materials provided with the distribution. 12## 13## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS'' 14## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 17## ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 19## SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 20## CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 21## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 22## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23## 24## The views and conclusions contained in the software and documentation are 25## those of the authors and should not be interpreted as representing official 26## policies, either expressed or implied, of the copyright holders. 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