/usr/share/octave/packages/geometry-1.7.0/geom2d/angleAbsDiff.m is in octave-geometry 1.7.0-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | ## Copyright (C) 2004-2011 David Legland <david.legland@grignon.inra.fr>
## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1 Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
## 2 Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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## -*- texinfo -*-
## @deftypefn {Function File} {@var{dif} =} angleAbsDiff (@var{angle1}, @var{angle2})
## Computes the absolute angular difference between two angles in radians.
## The result is comprised between 0 and pi.
##
## @example
## A = angleAbsDiff(pi/2, pi/3)
## A =
## 0.5236 # equal to pi/6
## @end example
##
## @seealso{angles2d, angleDiff}
## @end deftypefn
function dif = angleAbsDiff(angle1, angle2)
# first, normalization
angle1 = normalizeAngle(angle1);
angle2 = normalizeAngle(angle2);
# compute difference and normalize
dif = normalizeAngle(angle1 - angle2);
dif = min(dif, 2*pi - dif);
endfunction
%!shared xp
%! xp = pi/2;
%!assert (xp, angleAbsDiff (pi/2, 0), 1e-6);
%!assert (xp, angleAbsDiff (0, pi/2), 1e-6);
%!assert (xp, angleAbsDiff (0, 3*pi/2), 1e-6);
%!assert (xp, angleAbsDiff (3*pi/2, 0), 1e-6);
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