Hi Gerry,
Thanks for the kind words, but you are giving me too much credit, lol.
The viewer was written by our group member who goes by Wagyx. Wagyx then
wrote a simple version for me to use from my web pages. In this example
it opens in a windows and then you can choose full screen.
https://www.interocitors.com/polyhedra/offwin.html?url=120s/models/Ivanov_Q5_excavated_by_J92.alternate.off&transparency=0.5
What I wrote a python based command line system to open off and vrml
files in online viewers. The vrml files are displayed by x_ite x3d
viewer for browsers.
https://www.interocitors.com/polyhedra/webview/index.html
The page you referred to is Wagyx's full version which can indeed upload
files directly using the file chooser.
You also mentioned animations. The animations here are done by
generating series of pictures with PovRay. The off files are converted
with off2pov in a loop which will be customized for each particular
animation. Its a rather involved process but can make some very nice
animations.
At some point I'd like to look at the idea of live 3d animations but
that is for another day.
I'm glad you have enjoyed Antiprism!
Roger