1 %% Copyright (c) 2011, INRA
2 %% 2004-2011, 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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35 %% @deftypefn {Function File} {@var{alpha} =} angle3Points (@var{p1}, @var{p2}, @var{p3})
36 %% Computes the angle between the points @var{p1}, @var{p2} and @var{p3}.
38 %% @var{p1}, @var{p2} and @var{p3} are either [1x2] arrays, or [Nx2] arrays, in this case
39 %% @var{alpha} is a [Nx1] array. The angle computed is the directed angle between line
40 %% (@var{p2}@var{p1}) and line (@var{p2}@var{p3}).
42 %% Result is always given in radians, between 0 and 2*pi.
44 %% @seealso{points2d, angles2d, angle2points}
47 function theta = angle3Points(varargin)
49 if length(varargin)==3
53 elseif length(varargin)==1
61 theta = lineAngle(createLine(p2, p1), createLine(p2, p3));
66 %! % all points inside window, possibly touching edges
70 %! angle_ = angle3Points(p1, p2, p3);
71 %! assert(pi/2, angle_,1e-6);
72 %! angle_ = angle3Points([p1; p2; p3]);
73 %! assert(pi/2, angle_, 1e-6);
79 %! angle_ = angle3Points(p1, p2, p3);
80 %! assert(2, size(angle_, 1));
81 %! assert([pi/2;pi/2], angle_, 1e-6);