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In my particle system I've just implemented support for user-defined
gravity. One use of that is to simulate the gravity of planets etc. That's
what I've attempted in this animation. (The particles are not attracted to
each other though.)
Comments appreciated as always! :)
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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Attachments:
Download 'gravityfun.mpg' (511 KB)
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"Rune" <run### [at] mobilixnet dk> wrote in message
news:3c0e2e49@news.povray.org...
> In my particle system I've just implemented support for user-defined
> gravity. One use of that is to simulate the gravity of planets etc. That's
> what I've attempted in this animation. (The particles are not attracted to
> each other though.)
>
> Comments appreciated as always! :)
What finally happens? Do they all impact a planet? If my mental
simulation is correct, they would all have to...
Post a reply to this message
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"Bill DeWitt" wrote:
> What finally happens? Do they all impact a planet?
Of course I haven't tried it, but I think most (maybe all) will impact a
planet but some might leave the system (that happened in some other tests).
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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Curiouser and curiouser...
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Cool!
--
- Nekar
http://nekar_xenos.tripod.com/metanoia/
---
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Rune wrote:
>
> > What finally happens? Do they all impact a planet?
>
> Of course I haven't tried it, but I think most (maybe all) will impact a
> planet but some might leave the system (that happened in some other tests).
>
But be careful with concluding too much from it. After some time the
system might differ quite a lot from the physically accurate one because
inaccuracies of the numerical simulation grow. A standard way of testing
this (and also a method for correction) is to calculate the total energy
of each particle which has to stay constant (apart from collisions).
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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"Christoph Hormann" wrote:
> But be careful with concluding too much from it.
> After some time the system might differ quite a
> lot from the physically accurate one because
> inaccuracies of the numerical simulation grow.
I'm not sure I like what I hear. Are you implying that my particle system
may not be good enough for NASA to use?
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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"Tony[B]" wrote:
> Curiouser and curiouser...
Curious about what?
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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"Nekar Xenos" wrote:
> Cool!
Thanks!
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
Post a reply to this message
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"Rune" <run### [at] mobilixnetdk> wrote in message
news:3c0e39ec@news.povray.org...
> "Bill DeWitt" wrote:
> > What finally happens? Do they all impact a planet?
>
> Of course I haven't tried it, but I think most (maybe all) will impact a
> planet but some might leave the system (that happened in some other
tests).
>
From what I remember, there's no dfinate way to predict particle (planet)
motion around two larger bodies. The orbits of planets around a binary
couple get very chaotic, very quickly. Now where'd I see that article?
Post a reply to this message
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