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[Octave-cvsupdate] SF.net SVN: octave:[7318] trunk/octave-forge/extra/quaternion_oo
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From: <par...@us...> - 2010-05-17 18:17:53
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Revision: 7318
http://octave.svn.sourceforge.net/octave/?rev=7318&view=rev
Author: paramaniac
Date: 2010-05-17 18:17:46 +0000 (Mon, 17 May 2010)
Log Message:
-----------
quaternion_oo: add some operators
Modified Paths:
--------------
trunk/octave-forge/extra/quaternion_oo/INDEX
Added Paths:
-----------
trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/inv.m
trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mldivide.m
trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mrdivide.m
Modified: trunk/octave-forge/extra/quaternion_oo/INDEX
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/INDEX 2010-05-17 00:45:25 UTC (rev 7317)
+++ trunk/octave-forge/extra/quaternion_oo/INDEX 2010-05-17 18:17:46 UTC (rev 7318)
@@ -10,6 +10,9 @@
@quaternion/uminus
@quaternion/times
@quaternion/mtimes
+ @quaternion/inv
+ @quaternion/mldivide
+ @quaternion/mrdivide
@quaternion/transpose
@quaternion/ctranspose
@quaternion/horzcat
Added: trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/inv.m
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/inv.m (rev 0)
+++ trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/inv.m 2010-05-17 18:17:46 UTC (rev 7318)
@@ -0,0 +1,43 @@
+## Copyright (C) 2010 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{qinv} =} inv (@var{q})
+## Return inverse of a quaternion.
+## @end deftypefn
+
+## Author: Lukas Reichlin <luk...@gm...>
+## Created: May 2010
+## Version: 0.1
+
+
+function a = inv (a)
+
+ if (nargin != 1)
+ print_usage ();
+ endif
+
+ if (! isscalar (a.w))
+ error ("quaternion: inv: implemented for scalar quaternions only");
+ endif
+
+ norm2 = a.w*a.w + a.x*a.x + a.y*a.y + a.z*a.z;
+
+ a.w = a.w / norm2;
+ a.x = -a.x / norm2;
+ a.y = -a.y / norm2;
+ a.z = -a.z / norm2;
+
+endfunction
\ No newline at end of file
Added: trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mldivide.m
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mldivide.m (rev 0)
+++ trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mldivide.m 2010-05-17 18:17:46 UTC (rev 7318)
@@ -0,0 +1,28 @@
+## Copyright (C) 2010 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 -*-
+## Matrix left division for quaternions. Used by Octave for "q1 \ q2"
+
+## Author: Lukas Reichlin <luk...@gm...>
+## Created: May 2010
+## Version: 0.1
+
+
+function q = mldivide (a, b)
+
+ q = inv (a) * b;
+
+endfunction
\ No newline at end of file
Added: trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mrdivide.m
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mrdivide.m (rev 0)
+++ trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/mrdivide.m 2010-05-17 18:17:46 UTC (rev 7318)
@@ -0,0 +1,28 @@
+## Copyright (C) 2010 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 -*-
+## Matrix right division for quaternions. Used by Octave for "q1 / q2"
+
+## Author: Lukas Reichlin <luk...@gm...>
+## Created: May 2010
+## Version: 0.1
+
+
+function q = mrdivide (a, b)
+
+ q = a * inv (b);
+
+endfunction
\ No newline at end of file
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