Add butterchurn visualizations

[westurner]

Add support for butterchurn visualizations. Butterchurn is a WebGL port of projectM.

What are the specifiable params for butterchurn?

How to load a visualization with butterchurn and then change params without full re-init?

• https://github.com/jberg/butterchurn
  • butternchurn support in webamp:
    • https://github.com/captbaritone/webamp/pulls?q=is%3Apr+butterchurn+is%3Aclosed
    • https://github.com/captbaritone/webamp/blob/master/packages/webamp/js/webampWithButterchurn.ts
    • https://github.com/captbaritone/webamp/blob/master/packages/webamp/js/selectors.ts#L690-L752
      getMilkdrop*, getButterchurn*, getPreset*, getRandomizePresets
    • https://github.com/captbaritone/webamp/blob/master/packages/webamp-demo/js/butterchurnOptions.ts
• https://github.com/jberg/butterchurn-presets
• https://github.com/jberg/milkdrop-preset-converter
• https://github.com/projectM-visualizer/presets-cream-of-the-crop
• https://github.com/projectM-visualizer/presets-milkdrop-texture-pack
• https://github.com/milkdrop2077/MilkDrop3
  • MilkDrop3 sets a number of parameters that could be specified as params in a limit script

[westurner]

Not sure when I'll get to this. Just sharing the idea

[westurner]

vb, v1, :

cat  https://github.com/sdclibbery/limut/blob/master/examples.limut | grep '^v'