Thank you very much for taking the time to write all this. I think I
have to find a solution outside softimage.
Thank you very much really.
I will keep you posted with the advances if I reach one!
P.
El 10/18/2012 6:34 PM, Mathieu Leclaire escribió:
This is not an easy task to accomplish in Softimage, but it is doable.
I see two possible avenue I would explore:
1 - What I would try with Lagoa is emitting elastic particles for your
rigid objects and make the elasticity very stiff. Make sure they have
an ID based on the emitted mesh and a transformation relative to that
emitter. Then, at every iteration, I'd figure out a way to average
these particles transforms by ID to create a transform for the rigid
particle group that I would apply to the rigid object. So the particle
group (by ID) moves the mesh. Once you get that average tranform, I
would overwrite these elastic particle positions by multiplying their
saved relative transform by that new average transform and basically
bring them back into a rest state. That'll avoid the rigid mass of
particle to deform by their elastic properties and will allow proper
collision for the liquid particles. You are forcing particle positions
so it might insert some instabilities in the simulation, but I think
it should work.
So to recap, you let the elastic group deform and interact with the
liquid group in one iteration. Then you "undeform" the elastic group
by their averages to bring them back to a stable state as if it where
actually rigid. You then simply match the transform of your rigid
objects to that of it's relative group average transform and you keep
iterating.
That's one way.
2 - A second way would be by mixing Lagoa and Momentum. You would
simply simulate the liquid by Lagoa with your Rigid Body meshes as
collision object. So you would need a Deform Bodie with ICE controls,
and your ICE controls would sample the closest Lagoa particles and
create a force based on their average velocities. I think that would
be doable as well.
I haven't tried any of these techniques myself, but that's where I
would start experimenting.
Now if you need to do a big flood, you will probably need a lot of
particles to have a nice looking simulation. I hope you have a good
machine with a lot of memory and a lot of patience. Lagoa is best
suited for smaller scale simulation. It's not the best for large scale
liquid simulations. I would look into Houdini or Naiad (if it's still
available after Autodesk bought them) for better and quicker results.
Maybe even Realflow could be a better option. But if staying inside
Softimage is a must, I would explore these two suggestions.
Good luck! Your going to need it.
-Mathieu
Pablo Tufaro wrote:
Well, that may work...!
I will investigate a little bit on that one!
Thanks !
pablo.
El 10/18/2012 4:03 PM, Oleg Bliznuk escribió:
Here is some work on liquid->rbd interaction
http://si-community.com/community/viewtopic.php?f=4&t=281
I think adding backward influence is much more easy task
