Kepler orbits are hard

Or at least, the material that covers them is.  Why is it so hard for someone to lay out the problem nice and simply – “given these parameters and position at origin time, the position & velocity at time T will be:…”.

Still, it’s fun to screw around with.  I’m making some progress – I can at least calculate the period of a Kepler orbit correctly.  I’ve also coded up a bunch of algorithms for determining position & velocity, but their “input” is the angle of the position in question, not a time… so I’ll need to figure out how to map time to angle, and from there get the actually useful values.

It’s now 3:12 AM.  I shouldn’t be staying up this late.  I had planned on working from home tomorrow morning while doing washing, but maybe I won’t have time now. :/

Still… it’s been a long time since I stayed up late coding.  It’s kind of nice.  More rewarding than doing the same playing Left 4 Dead 2.

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