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Author Topic: I tried the demo, a question.  (Read 4037 times)

stilgar

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I tried the demo, a question.
« on: May 15, 2011, 10:59:50 AM »
When i set very high speed velocity in the solar system simulation some planets (the nearest to the sun) fly away, like i'm changing the centrifugal force. Is this normal?

S.
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Darvince

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Re: I tried the demo, a question.
« Reply #1 on: May 15, 2011, 12:04:57 PM »
It can't calculate the positions fast enough to retain a stable orbit.
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stilgar

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Re: I tried the demo, a question.
« Reply #2 on: May 15, 2011, 12:07:36 PM »
Quote from: Darvince on May 15, 2011, 12:04:57 PM
It can't calculate the positions fast enough to retain a stable orbit.

Ah ok. So what's the maximum speed i can set without errors (i like to change parameters slightly and see what happens in years)
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Darvince

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Re: I tried the demo, a question.
« Reply #3 on: May 15, 2011, 12:15:13 PM »
Oh I thought you were talking about something else. That's because they're too far out from the Sun to have an orbit that fast.
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stilgar

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Re: I tried the demo, a question.
« Reply #4 on: May 15, 2011, 12:28:21 PM »
Yes i was talking about the simulator time speed, not the planets real speed.
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Darvince

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Re: I tried the demo, a question.
« Reply #5 on: May 15, 2011, 12:40:53 PM »
The fastest is 1/10 of the orbit that takes the least time. (So in just planets on Solar System it is 8.8 days)
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stilgar

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Re: I tried the demo, a question.
« Reply #6 on: May 15, 2011, 01:38:13 PM »
Quote from: Darvince on May 15, 2011, 12:40:53 PM
The fastest is 1/10 of the orbit that takes the least time. (So in just planets on Solar System it is 8.8 days)

per second or per frame?
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Joshimitsu91

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Re: I tried the demo, a question.
« Reply #7 on: May 15, 2011, 01:58:13 PM »
Quote from: stilgar on May 15, 2011, 01:38:13 PM
Quote from: Darvince on May 15, 2011, 12:40:53 PM
The fastest is 1/10 of the orbit that takes the least time. (So in just planets on Solar System it is 8.8 days)

per second or per frame?

Try both? lol
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Dan Dixon

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Re: I tried the demo, a question.
« Reply #8 on: June 10, 2011, 05:26:37 PM »
Quote from: stilgar on May 15, 2011, 10:59:50 AM
When i set very high speed velocity in the solar system simulation some planets (the nearest to the sun) fly away, like i'm changing the centrifugal force. Is this normal?

Yes. When you increase the time step you lower the accuracy of the simulation.

More info here:
http://universesandbox.com/faq/#sim
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