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generativefm / generators

A collection of generative music pieces for generative.fm
MIT License
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What is window.generativeMusic.rng() ? #8

Open tatecarson opened 3 years ago

tatecarson commented 3 years ago

HI Alex,

I'm exploring the code trying to learn how you made some of these and I'm running into an issue. You have this window.generativeMusic.rng() in use all over the place but I can not find where it is defined. Is it some sort of random seed?

Thanks.

alexbainter commented 3 years ago

Hi again Tate!

The implementation is a little hacky but it's just a random number generator that defaults to Math.random.

https://github.com/generative-music/pieces-alex-bainter/blob/1186f13dc24a42e5485cc39ede313328f64b4b61/packages/utilities/src/wrap-activate.js#L8-L9

I wanted to add a reward for people who supported Generative.fm where I'd use their name to seed the random number generator, but I'd already written so much code where I just used the global Math.random(). So I just replaced those with window.generativeMusic.rng(), and then I could override it with a another (seedable) rng. For example, here's where I do that in Generative.fm Play: https://github.com/generative-fm/play/blob/11ae5750c0c1aac2ba7b2be5626ebca8c687d434/src/app/redux-app.jsx#L32-L35

alexbainter commented 3 years ago

I'll be sure to note this in the readme