[Sidefx-houdini-list] Smorganic

Szymon Kapeniak szymon.kapeniak at gmail.com
Sat Apr 17 14:09:42 EDT 2010


Go it. Thanks!:
http://www.cgw.com/Publications/CGW/2009/Volume-32-Issue-12-Dec-2009-/Viewpoint.aspx

2010/4/17 Alex Czetwertynski <alex at franktheplumber.com>:
> 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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