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It looks funny to the point that I laughed... good luck getting it to work
properly (don't erase the old one).
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well maby try some physics
John VanSickle wrote:
> I had the idea of simulating the behavior of a bunch of weights and
> springs all connected together. I tried one approach to simulating
> this, resulting in the animation attached to this message. As you
> can see, it starts out OK, but begins to oscillate in an unnatural
> fashion. I have an idea for a method of cheating away the problem,
> but I'm also working on my next IRTC entry as well. When results are
> forthcoming I'll post something more useful.
>
> Regards,
> John
> --
> ICQ: 46085459
>
> ------------------------------------------------------------------------
> Name: not!.mpg
> not!.mpg Type: MPLAYER2 File (video/mpeg)
> Encoding: base64
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On Mon, 24 Jan 2000 20:59:14 -0500, John VanSickle
<van### [at] erols com> wrote:
>I had the idea of simulating the behavior of a bunch of weights and
>springs all connected together. I tried one approach to simulating
>this, resulting in the animation attached to this message. As you
>can see, it starts out OK, but begins to oscillate in an unnatural
>fashion. I have an idea for a method of cheating away the problem,
>but I'm also working on my next IRTC entry as well. When results are
>forthcoming I'll post something more useful.
>
>Regards,
>John
Ah, so you went ahead and got bouncy after all, didn't you? :)
Have you tried to make it lose energy upon impact?
Peter Popov
pet### [at] usanet
ICQ: 15002700
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Hey, it looks funny.
And don't try to do physics :-)
Try to do numerics. I guess you use an explicit euler scheme. And that
won't work. At least it is known to increase energy. Well, what is
explicit euler? Just take the derivatives and the current forces and
apply newton. Better is an implicit euler scheme. But this may involve
solving a system of equations. Now this is not something pov is really
into.
You may just try to use more timesteps, just don't render them but do
like 10 steps in the numerics for each step in the render. If you like
parsing time, that's the way to go.
Axel
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That is some pretty funky physics, for sure.
I wonder if I detect the Matrix Master here.
I enjoyed it and look forward to seeing more
(when you have the time.)
Peter
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one word.
BOINGGGGGGGGG!!!!!!!
LOL
Rick
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Peter Popov wrote:
>
>
> Ah, so you went ahead and got bouncy after all, didn't you? :)
>
> Have you tried to make it lose energy upon impact?
You probably have to introduce the energy loss from the springs as well
....
i.e. make something like this:
velocity[point] = velocity[point]*Damping + (.. forces, etc.....)
and use values from .90 to .99 for Damping.
Go to this web page for more info:
http://freespace.virgin.net/hugo.elias/models/m_string.htm
(but you maybe already know it)
Bouf.
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Would have? It is cool.
Ever see the movie Flubber? This could be a toy made out of it. I think it's a
great start, just need applications for it.
Bob
"John VanSickle" <van### [at] erolscom> wrote in message
news:388D0372.A915605C@erols.com...
| I had the idea of simulating the behavior of a bunch of weights and
| springs all connected together. I tried one approach to simulating
| this, resulting in the animation attached to this message. As you
| can see, it starts out OK, but begins to oscillate in an unnatural
| fashion. I have an idea for a method of cheating away the problem,
| but I'm also working on my next IRTC entry as well. When results are
| forthcoming I'll post something more useful.
|
| Regards,
| John
| --
| ICQ: 46085459
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I haven't got the smarts to deal with real physics or the imagination
to come up with my own ideas for animations, so I stole your idea...
I gave the beans from my last posting a linear attraction to the origin,
a 1/distance repulsion from each other, and filled the space with a
constant friction factor. I also added a love of the ground to these
little guys. The full (5MB) movie is http://members.home.net/spock19
I use a Java program to pre-compute the positions of each point in
each frame and POV to render the frames. This time I chose to show
each point as a sphere and connected them with cylinders (stealing
from you once again :-)
If you want a copy of my code just ask. I should warn you it makes
no attempt to implement physics (phony or otherwise), but it seems to
make interesting movies...
"John VanSickle" <van### [at] erolscom> wrote in message
news:388D0372.A915605C@erols.com...
> I had the idea of simulating the behavior of a bunch of weights and
> springs all connected together. I tried one approach to simulating
> this, resulting in the animation attached to this message. As you
> can see, it starts out OK, but begins to oscillate in an unnatural
> fashion. I have an idea for a method of cheating away the problem,
> but I'm also working on my next IRTC entry as well. When results are
> forthcoming I'll post something more useful.
>
> Regards,
> John
> --
> ICQ: 46085459
Post a reply to this message
Attachments:
Download 'Spring90.jpg' (21 KB)
Preview of image 'Spring90.jpg'
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John VanSickle wrote:
>I had the idea of simulating the behavior of a bunch of weights and
>springs all connected together. ...
Here the java source of "Struct" and "Fuidiom" is available. Could be a
source of inspiration.
http://www.fluidiom.com/index.jsp?droplet=droplets/code/droplet.jsp
Ingo
--
Photography: http://members.home.nl/ingoogni/
Pov-Ray : http://members.home.nl/seed7/
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