Schroedingers-Hat/jsphys — comment on commit 2238b8181104def4ea3907cbdfed5330cc71c021
File: relativity/js/scene.js line 25
By Schroedingers-Hat:

Render minkowski to a hidden canvas and overlay.
The text/line widths are not right, but you get the idea.

Could maximise it when clicked.