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munshkr / flok

Web-based P2P collaborative editor for live coding sounds and images
https://flok.cc
GNU General Public License v3.0
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Sync Hydra clock #243

Open munshkr opened 8 months ago

munshkr commented 8 months ago

I was thinking it'd be interesting to explore syncing Hydra internal clock (the time variable on HydraSynth). We could send this time variable on each evaluation and update the time variable on each peer that receives that evaluation message with the sent time value.

tmhglnd commented 5 months ago

Is a good idea, but with the downside that the animation might look interrupted because the time is all of a sudden reset to a different position. So smooth motion from oscillators and rotation is broken because of it. Maybe the resyncing should only happen when a new client enters the session, or when Hydra is hush()-ed.

munshkr commented 5 months ago

Is a good idea, but with the downside that the animation might look interrupted because the time is all of a sudden reset to a different position. So smooth motion from oscillators and rotation is broken because of it. Maybe the resyncing should only happen when a new client enters the session, or when Hydra is hush()-ed.

Hey! Yes, it's not as easy as I thought at first... I guess we'd need to only sync new clients by taking another client as reference. But things can go wrong anyway and drift, so it will never be perfect.

My motivation was mainly solving the use case of having two Hydra windows in the computer, one for rendering in another screen/projector for instance (there are some situations where you don't want to show the code for example, and it'd be great that both windows are synced).

tmhglnd commented 5 months ago

I think it could make sense to just have a section in the Flok documentation explaining the option to re-sync hydra visuals amongst clients. If the .time variable is exposed as a global/window variable it can just be included in the code and run once before a performance starts to allow users to sync up manually if they prefer. I don't know what the variable is in Flok, but in Hydra it can be reset with hydraSynth.synth.time = 0 (in the past it was H.synth.time = 0)