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dehmon
10-06-2007, 07:29 AM
Hello Friends,
I am making a scene that requires TP. I need particles to interact with each other & an object. Spheres fall, bounce, then fill a square space until it is full. Sounds simple right?
I have tried to combine the TP presets offered by Skrek. I first thought I could solve it with just the Obj Collide preset, unfortunately the spheres (particles) end up intersecting with each other. I followed the thread "Need help with XPresso/TP" TP along a spine...thinking it was similar problem. I have experimnted with creating different groups of particles starting with the Object Collide preset, but when I assigne more than one group the scene freezes up and no particles work at all.
I am sure it has something to with the "TP/ expresso mind" trying to calculate both the object/ and particles intention.
Any ideas on a way to combine those 2 presets?
Any input is very appreciated.
Srek
10-06-2007, 02:46 PM
Actualy thats a pretty tough problem since TP does not have hard particle/particle collisions.
I would fake the effect, maybe by moving particles that come to rest in a different group that fixes them.
Cheers
Björn
abdelouahabb
10-06-2007, 07:15 PM
hi
there is a tip, i dont know if it will work :D
so objects can't collide, but particles can! here is the tip, and the object collision is calculated in small areas like vertex (points), so the idea is to make two emitters;
1-the standard emitter like pstorm
2-and the PSurfacePosition, so like that, when pstorm emits spheres for exemple, and those spheres emit few particles (without geometry), spheres will collide due to particles emitted by psurfaceposition!
tried it but i can't emit particles that (emits)!
perhaps it has no sense what i said, but it's just an idea :thumbsup:
ChrisCousins
10-06-2007, 09:17 PM
Hello Friends,
I am making a scene that requires TP. I need particles to interact with each other & an object. Spheres fall, bounce, then fill a square space until it is full. Sounds simple right[/b]

Hi dehmon - how many objects are you talking about? If it's less than a thousand or so, maybe try SilverBullet by Remo (http://www.remotion4d.net/index_main_2.0.html), should be able to handle this sort of thing no problem. Here's a simple example:

Movie (1.5Mb) (http://www.chriscousins.plus.com/files/PhyTools/ball_drop3.mov)

Cheers - C
dehmon
10-06-2007, 09:28 PM
Interesting. I would try that but am unsure of what you mean. Is there a way to switch groups...in the middle of a TP event? Or would I be making 2 groups?
dehmon
10-06-2007, 09:31 PM
Hi dehmon - how many objects are you talking about? If it's less than a thousand or so, maybe try SilverBullet by Remo (http://www.remotion4d.net/index_main_2.0.html), should be able to handle this sort of thing no problem. Here's a simple example:

Movie (1.5Mb) (http://www.chriscousins.plus.com/files/PhyTools/ball_drop3.mov)

Cheers - C


That ias almost exactly what I am looking to do. Definitely,the ways the balls dont intersect...will look into it and see if it will help finish the effect! Muchas gracias for pointing me in that direction!
Srek
10-07-2007, 12:33 PM
Interesting. I would try that but am unsure of what you mean. Is there a way to switch groups...in the middle of a TP event? Or would I be making 2 groups?
It's possible, you have to enable a PGroup node with the event to do this.
If you have a bit of time (few days) you might like to wait for my new presets to come. Presets for group changes are a major part of the new stuff in them
Cheers
Björn
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