egg|anbo|egg changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is 陈景润. We currently target 1.2.2, 1.3.0, and 1.3.1. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/
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<GH> [Principia] pleroy opened pull request #1640: Detect collisions in the force computation and thread errors through the integrators and the ephemeris (master...Collisions) https://git.io/vbOqA
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<awang> egg: When you reduce the max history length, does Principia throw away history beyond the threshold?
<awang> Or does it just stop rendering older history?
<egg> yeah it throws it out which is a bit stupid
<egg> we need to rewrite that at some point
<lamont> egg: do you know anything about the patchedconic api in ksp?
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<GH> [Principia] eggrobin commented on issue #1639: We know what is happening here: Principia does axial tilt by tilting the universe around the main body, and it does not properly tilt the vessels while doing so.... https://git.io/vbO0G
<egg> lamont: not really
<egg> lamont: I might know how to disable bits of it
<lamont> nah i need to know the right incantations to use it correctly
<awang> egg: Should I open an issue for tracking?
<egg> awang: if you want you can open a feature request of sorts but it's not necessary, we're aware of this stuff
<awang> egg: If you already know about it I'll avoid cluttering your issue tracker any more
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<GH> [Principia] pleroy pushed 13 new commits to master: https://git.io/vbOa7
<GH> Principia/master 0239110 pleroy: Change the ephemeris to detect collisions and propagate a status to the integrator.
<GH> Principia/master 82c76f3 pleroy: Merge branch 'master' into Collisions
<GH> Principia/master fd7d2e5 pleroy: Propagate status through the integrator.
<GH> [Principia] pleroy commented on issue #1628: So another problem is that, when the vessel goes close to a singularity, the integrator is no longer symplectic and doesn't conserve energy, typically resulting in ridiculous accelerations. Furthermore, the integrator, being multistep, starts having wild oscillations that result in wild variation of the velocity. The proper fix is to detect that we are moving too close to a singularity (because we are inside a
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<GH> [Principia] Damien212 commented on issue #1639: Ah, that makes sense. I'll bear it in mind for future missions. Thanks. https://git.io/vbOX4
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