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.
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
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