OK. here it is, The applet for inversion with respect to a sphere as a Rhino4 plugin available for free download from:
http://en.wiki.mcneel.com/content/upload/files/Inverter_applet.zip
Any questions or comments please let me know. I’d love to be able to post images or links to show any ways anybody finds of using it.
Space Symmetry Structure 
November 27, 2008 at 12:40 pm
Hey Daniel, I’m a pen and paper mathematician and use inversion in a sphere in my work. Unfortunately I am not the best with computers and when i tried to look at the applet, the computer told me I didn’t have the correct viewer or something like that. Any chance you could tell me what I need to see the applet?
All the best,Julie
November 27, 2008 at 1:54 pm
Hi Julie,
Im afraid this applet is written for Rhino(a commercial 3D software) and wont run without it.
This is a limitation I would very much like to overcome in future projects, as I want my work to connect with a wide range of people, not just those who own particular software.
I’m now programming more in a language called Processing, which is free, open source, and will run in most web browsers.
I do intend to use this language to write some similar 3D applets which are non platform dependent, but it means not having the nice set of 3D tools I had to call on when programming in Rhino, so I’ll need to learn lots of new stuff and it might take a while.
Daniel
December 3, 2011 at 10:26 am
[…] https://spacesymmetrystructure.wordpress.com/2007/08/02/inversion-applet/ […]
June 23, 2014 at 9:02 pm
Hi Daniel, I tried to use your applet for rhino 5 but unsuccessfully. Is it for rhino 4 only ? would you have upgraded it for rhino 5 by any chance ? or am I just doing things wrong ?
best
Chris
September 15, 2015 at 2:16 am
Is there a reason why it doesnt work when I add materials on vray?