feat: Initial enabling of 3D

Turns on 3D viewer when needed; implements tetrahedron command. Still
   quite several commands remaining for first test construction
   (from Rostamian's incenter.html) to work.
This commit is contained in:
Glen Whitney 2023-10-07 08:55:56 -07:00
parent c99b51dafa
commit 3245db6d07
28 changed files with 29178 additions and 36 deletions

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