*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

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

@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.

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