Mercurial > forge
view main/quaternion/inst/@quaternion/exp.m @ 9892:8ad402be2313 octave-forge
main/quaternion --> extra/quaternion-legacy, extra/quaternion_oo --> main/quaternion
author | paramaniac |
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date | Wed, 28 Mar 2012 03:16:58 +0000 |
parents | extra/quaternion_oo/inst/@quaternion/exp.m@26087878a7d3 |
children |
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## Copyright (C) 2011 Lukas F. Reichlin ## ## This program is free software: you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## This program is distributed in the hope that it will be useful, ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this program. If not, see <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{qexp} =} exp (@var{q}) ## Exponential of a quaternion. ## @end deftypefn ## Author: Lukas Reichlin <lukas.reichlin@gmail.com> ## Created: November 2011 ## Version: 0.1 function q = exp (q) if (nargin != 1) print_usage (); endif normv = normv (q); exps = exp (q.w); sinv = sin (normv); q.w = exps .* cos (normv); q.x = exps .* (q.x ./ normv) .* sinv; q.y = exps .* (q.y ./ normv) .* sinv; q.z = exps .* (q.z ./ normv) .* sinv; endfunction