Cool visualization but it focuses so much on the ``'-.,_,.-'`waves`'-.,_,.='`` and not on the actual coverage pattern of 6-12.5cm waves, so not as actually useful for showing coverage as other tools, but fun as an art project.
If you like that, you might also love NestDrop for music visualization tailored for VJs and with special features to support projecting inside domed surfaces https://nestimmersion.ca/nestdrop.php
And of course, I can't mention that without shouting out projectM (open-source Milkdrop) that supports WebGL https://github.com/projectM-visualizer/projectm/blob/master/... and one of the OGs, Geisswerks https://www.geisswerks.com/
If you like that, you might also love NestDrop for music visualization tailored for VJs and with special features to support projecting inside domed surfaces https://nestimmersion.ca/nestdrop.php