1 %% Copyright (c) 2011, INRA
2 %% 2005-2011, David Legland <david.legland@grignon.inra.fr>
3 %% 2011 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
5 %% All rights reserved.
6 %% (simplified BSD License)
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9 %% modification, are permitted provided that the following conditions are met:
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35 %% @deftypefn {Function File} {@var{b} = } isLeftOriented (@var{point}, @var{line})
36 %% Test if a point is on the left side of a line
38 %% B = isLeftOriented(POINT, LINE);
39 %% Returns TRUE if the point lies on the left side of the line with
40 %% respect to the line direction.
42 %% @seealso{lines2d, points2d, isCounterClockwise, isPointOnLine, distancePointLine}
45 function b = isLeftOriented(point, line)
49 x0 = repmat(line(:,1)', Np, 1);
50 y0 = repmat(line(:,2)', Np, 1);
51 dx = repmat(line(:,3)', Np, 1);
52 dy = repmat(line(:,4)', Np, 1);
53 xp = repmat(point(:,1), 1, Nl);
54 yp = repmat(point(:,2), 1, Nl);
57 b = (xp-x0).*dy-(yp-y0).*dx < 0;