One of the best collection of pointers for this stuff is the 'Non-Linear Magnification Homepage' at
http://www.cs.indiana.edu/~tkeahey/research/nlm/nlm.html
It coveres a lot of useful stuff about many different aspects (including fisheye techniques). Incidentally, it's hard to believe that hyperbolic trees are patented per se - the math has been there before and even the projections (AFAIK). And there are plenty of approaches that have similar properties (just check out the refs from above) so that it should be easy to come up with a sufficiently distinctive technique that's not covered by patents.
- Andreas
PS. Here's one idea - how about using Quaternion space?! Has a couple of cute properties... (there are probably more reasonable approaches but why bother?! ;-)
-----Original Message----- From: Henrik Gedenryd [mailto:Henrik.Gedenryd@lucs.lu.se] Sent: Tuesday, March 28, 2000 10:44 PM To: squeak@cs.uiuc.edu Cc: recipient list not shown Subject: Re: zoomable morph?
Torsten.Bergmann@phaidros.com wrote:
An interesting representation for trees is Hyperbolic Tree http://www3.inxight.com/htdbdemo/htdocs/index.html
It's patented :(
Torsten
There are also Fisheye views, original reference in Proceedings of CHI 86-87 something (George Furnas wrote it I believe). This technique is quite useful in practice as well. References to this technique can probably be found in various places on the net.
Henrik