On 03.11.2011, at 12:00, JuanPi wrote: > On Thu, Nov 3, 2011 at 11:45 AM, Lukas Reichlin > <lukas.reich...@gmail.com> wrote: >> On 03.11.2011, at 10:28, JuanPi wrote: >> >>> Hi, >>> >>> In mid January 2012 I will start porting the Robotics Toolbox >>> (http://petercorke.com/Robotics_Toolbox.html) to Octave. >>> However I will break it in several packages since some functions are >>> already available and in some cases with better performance. >>> >>> One of the packages will be tools to manipulate quaternions and >>> rotations. Rotations (Euler angles, currently in devel version of >>> mechanics packages) will be inside the geometry package, but I think >>> quaternions could be a package itself. >>> >>> What do you think? >>> Is there a package that handles quaternions already in Octave-forge? >>> >>> Thanks >>> >>> -- >>> JuanPi Carbajal >>> ----- >>> "Complex problems have simple, easy-to-understand wrong answers." >>> Murphy’s Law Book Two >>> ----- >>> http://ailab.ifi.uzh.ch/carbajal/ >> >> Hi Juan, >> >> There are several packages. The official "quaternion" package [1], the >> object-oriented "quaternion_oo" [2] I started some time ago and the >> Quaternion Toolbox for Matlab [3]. The last two packages offer overloaded >> operators and matrices of quaternions. >> >> Best regards, >> Lukas >> >> >> [1] >> http://octave.svn.sourceforge.net/viewvc/octave/trunk/octave-forge/main/quaternion/ >> >> [2] >> http://octave.svn.sourceforge.net/viewvc/octave/trunk/octave-forge/extra/quaternion_oo/ >> >> [3] >> http://qtfm.sourceforge.net/ > > > Hi Lukas, > > Thanks for the prompt answer. I see the quaternion_oo is not released > yet, right? How is the overlap with the quaternion package? The latter > seems to be gradually abandoned... Last release is from 3 years ago.
Yes, quaternion_oo is not yet released. My intention is/was that, once it is mature enough, I rename it to quaternion and replace the older package. The author of the older package, Scottedward Hodel, has passed away. He implemented the quaternion package long before classes were introduced with Octave 3.2. > I will check what is missing in quaternion_oo that the robotic toolbox > requires. I will also benchmark different versions of the same > algorithm. Is that OK with you? Do as you please. Maybe we could improve the performance of quaternion_oo. > With the functions that are already implemented in quaternion_oo, > shall I create aliases to avoid changing the Robotic toolbox? Shall I > put this aliases in the Robotic toolbox? What do you suggest? I would include it in quaternion_oo if it is of general use and to Robotics otherwise. But as you are the developer of the new stuff, I leave it up to you to decide. Feel free to modify/improve quaternion_oo, it is not a cathedral ;-) > -- > JuanPi Carbajal > ----- > "Complex problems have simple, easy-to-understand wrong answers." > Murphy’s Law Book Two > ----- > http://ailab.ifi.uzh.ch/carbajal/ > Lukas ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
