My goal ultimately is to be able to simulate convincingly (not neccesarily 
accurately) The behavior of a bubble or groups of bubbles rising in a 
fluid, such as water. For this I'm not really using much in the way of 
accurate physics models. Though that may loosen things up for more 
flexibility. I believe it's possible, and even reletively easy (though not 
for me) to simulate bubble shapes that deform, rise, split apart and rejoin 
freely.

This animation shows my first step, of making a rough simulation of the 
behavior of the air particles in a bubble. The next step, which I shall ask 
your help on, is identifying the top most particles of the clump, so I can 
apply force to them.

Please let me know what you think of the animation and the question. it is 
in divx 5 format, if you need a different codec let me know. Thanks

-ZenPsycho

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Download 'attract.avi.dat' (64 KB)