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onceadrog / lagrange

A space game
MIT License
1 stars 1 forks source link

Orbits #1

Open onceadrog opened 7 years ago

onceadrog commented 7 years ago

Code to put stuff into orbits needs fixing. Probably need to rebuild the way orbits are done in general.

onceadrog commented 7 years ago

Grav calculations are returning valid values. But application of those values appears buggy. Especially noticeable on "launch" where apparent rounding issues are resulting in unpredictable results. Possibly due to rapid change of gravity gradient close to earth, but seems unlikely.
This is also probably why stuff isn't "settling" into elliptical orbits.

Need to populate some datasheets to show the actual numbers applied.

onceadrog commented 7 years ago

Hmm, had a thought. The gravitation force is being applied based on a single position, rather than as an aggregate since the last tick. Looks more valid now.

cij11 commented 7 years ago

This might be worth a read. Nice introduction to numerical integration, with specific code examples to apply to physics in games.

https://gafferongames.com/post/integration_basics/

On Sun, Oct 1, 2017 at 1:50 PM, onceadrog notifications@github.com wrote:

Hmm, had a thought. The gravitation force is being applied based on a single position, rather than as an aggregate since the last tick. Looks more valid now.

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