Anthony wrote: > I haven't been following this thread, but as I have pointed out on > this list before, the standard way to set up an arbitrary 3D rotation > is not Rx*Ry*Rz but Rz*Ry*Rz (Euler angle rotation). (Some people use > Rz*Rx*Rz which is essentially the same.)
Anthony, Thank you for reminding us of this ... As we were working on this I had this feeling that there had been some discussion at some point in the past, but I could not place it ... > There is an alternative approach, using quaternions, which provides > the formula for a rotation through a specified angle about a specified > axis. Jmol is using axis-angle rotations for the newly introduced moveTo command. I think/believe/hope that the axis-angle approach used by Jmol is correct/standard. > I suggest that Jmol should use one of these standard, well-documented, > approaches rather than introducing something different. I agree completely. I will change the implementation of 'show position' to print out the orientation using the Euler angle rotation x-convention. Thanks again for pointing this out. Miguel ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ Jmol-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jmol-users
