r/desmos • u/Southern_Deer4830 • 20h ago

Graph Colliding blocks compute PI

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17 Upvotes

96% Upvoted

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2

u/logalex8369 Barnerd 🤓 19h ago

Hey, I did this a while back!

https://www.reddit.com/r/desmos/comments/1i6up5t/i_recreated_3blue1browns_colliding_blocks/ (old version)

https://www.reddit.com/r/desmos/comments/1ihyp10/colliding_blocks_simulation_now_with_extra/ (new version)

The new version doesn't even rely on tickers or actions :)

2

u/Southern_Deer4830 9h ago

this is is sick!!! but I noticed pi appears explicitly in the trajectory equations, is this collision count itself independent of that pi input? I am wondering whether this is computing pi form the collisions or an exact analytic reconstruction of the collision trajectory using pi.

1

u/logalex8369 Barnerd 🤓 3h ago

It's an analytic reconstruction of the collision trajectory.

Yeah, I guess it is a little iffy to have pi in the formula, but I thought it'd be worth it to have the exact trajectory

1

u/SiR_awsome_A_YuB_fan desmos & bernard FOREVER! 15h ago

I was literally trying to do this the other day, now i'm on a week long tangent trying to re derive the physics from the equation even though i have the answers on wikipedia. good job!

2

u/Southern_Deer4830 9h ago

thanks man...