[Sidefx-houdini-list] Smorganic

Alex Czetwertynski alex at franktheplumber.com
Sat Apr 17 13:25:25 EDT 2010

If you can find it, get the CGW (Computer Graphics World) issue from  
december 09 (the one with Avatar on the cover).  The Fusion CS people  
wrote an article on smorganics and how it works within realflow

On Apr 17, 2010, at 7:12 AM, François Duchesneau wrote:

> And with a Vop Pop you can have lots of control on the behavior of the
> global force and letting the sph make the particles stick together.
> François
> Szymon Kapeniak wrote:
>>>> I've looked at the orbit node but it seems like it orbits a bunch  
>>>> of
>>>> particles around another particle, my problem is to fill new  
>>>> particles
>>>> (probably to a position where the density is below a threshold)  
>>>> into a
>>>> fluid
>>>> simulation...
>>>> I'm quite new in DOPs/POPs in houdini (although I'm much more  
>>>> experienced
>>>> with SOPs), so I don't know how to setup a system that adds new  
>>>> particles
>>>> to
>>>> an ongoing simulation...
>>>> Thank you...
>> How close you can come to Fusion demos this is another story of
>> course, but my suggestion would be to dive into sph solver in DOPs  
>> and
>> look around. Basically it consists with a series of microsolvers
>> computing different qualities of fluids. You can turn on / turn off
>> any of them (open asset and start play with it) - I think only  
>> density
>> is mandatory for other solvers to work properly. You can for example
>> turn off all external forces and pipe a pop solver instead to a  
>> chain.
>> If you point it to a pop network (like the one created for you by a
>> shelf tool "Particle Fluid from Object", you can control fluids like
>> they were particles, but they look rather like computed by sph. I
>> suspect this is what is happening in Fusion demos inside RF.
>>> 2010/4/17 Alex Czetwertynski <alex at franktheplumber.com>:
>>> I was at a presentation at DMALA where the Fusion guy was showing  
>>> this.  He made a big point about it being a Realflow solution only.
>> Perhaps in terms of amount of particles which practically can be
>> computed, this can be done by RF only.
>>> I think you should have been more specific in what about the  
>>> example you
>>> were looking to recreate. François' suggestion of the orbit pop  
>>> would be for
>>> making the particles move in the vortex, but my guess is that  
>>> you're trying
>>> to make the water stay in a nice thin sheet as it moves. That is a  
>>> much
>>> harder task. Maybe you could contact the guy from Fusion CIS to  
>>> see if you
>>> could license his solver and use it in DOPs. Just a thought.
>> Aren't they using vanilla Realflow with custom scripting?
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