*scrutinizing differential equations for double pendulum system* how did i EVER program a simulation of this once before
why are the wikipedia equations and the wolfram scienceworld equations so different???? aaaghhh
@typhlosion To be fair, it *is* a double pendulum system. I'm not sure we can count on conservation laws mattering to it.
@typhlosion
mood: "endless hallway" from OFF OST
@typhlosion what integrator function are you using?
@yaodema i'm using the time tested ad-hoc "calculate the deltas using equations i found on The Internet, multiply by delta-time, and then add those to the current theta and momentum" method, probably the simplest possible. which im sure is where the problem is
@typhlosion I suggest using velocity verlet and fixed delta-t. Verlet integrators preserve energy. Euler... does not.
@yaodema i am learning all sorts of exciting new words and phrases today
@yaodema after quickly skimming the wikipedia article on verlet integration, it occurs to me that i have no idea what i'm doing
double pendulum update: either i typed something in wrong or the rudimentary simulation method i'm using is more unstable than i thought, but the system appears to be erroneously *gaining* energy very quickly