Slight variation on the same general idea, plus visual path debugging and ICE kinematics to constrain a null between two quaternions: http://dl.dropbox.com/u/441883/xsi/quatPathInterpolate_example.gif
...and an emdl (saved in SI 2012) of it: http://dl.dropbox.com/u/441883/xsi/quatPathInterpolate_example.zip Enjoy, -- Alan On Wed, Jul 11, 2012 at 3:40 PM, Grahame Fuller <[email protected] > wrote: > Increment Quaternion with 2 Vectors, then linear interpolate between the > two quaternions. Use the result to rotate the first vector. > > [cid:[email protected]] > > gray > > _____________________________________________ > From: [email protected] [mailto: > [email protected]] On Behalf Of Jeff McFall > Sent: Wednesday, July 11, 2012 03:12 PM > To: '[email protected]' > Subject: traveling the shortest distance between two points on a sphere? > > > Hi all, > > I am trying to find the best way to move a point along a path of the > shortest distance between two points on the surface of a sphere. > Probably a pretty basic geometry function but I am having trouble even > starting. > >From what I can gather the way to solve this is through a Great Circle > calculation > > I am getting hung up on the long/lat conversion to 3Dspace, not to mention > how to interpolate the movement along this path once calculated > > Anyone happen to have a tutorial or know of a compound that could help? > in ICE of course > > many thanks > Jeff > > >
