Cosmic Voyage > String theory
From: Bradley Gabe
[mailto:withanar(at)stanwinston.com]
Sent: Wednesday, May 02, 2007
6:11 PM
To: XSI(at)Softimage.COM
Subject: Re: Particle
attraction
...or some other string instrument :-/
Oh ye of little
faith!
1) Set up your particle sim in Maya
or Houdini, render it out
2)
Get>Primitive>Grid
3)
Get>Material>Constant
4)
Get>Texture>Image
5) Map the effect onto
the grid in XSI
viola!
yep, 1996. And most of the effects in this movie cannot be done in XSI
today.
Vincent Fortin wrote:
>>> Hope it's still in theaters
>>>
> Gulp... 1996!
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf
> Of Vincent Fortin
> Sent: Wednesday, May 02, 2007 4:58 PM
> To: XSI(at)Softimage.COM
> Subject: RE: Particle attraction
>
> Ah good to know, Francois. Hope it's still in theaters. Is it
> stereoscopic by any chance?
>
> Just a precision: in Maya, any force field can be applied
> "per-particle". And each parameter on that force can be controlled
> "per-particle" so you can have 1,000+ different newtons affecting your
> particle cloud.
> It's quite useful for making flying pollen over a wheat field for
> example. Every time I have to do this in XSI I end up animating a bunch
> of Eddies manually. Even with expressions, the turnaround time is still
> much slower compared to the procedural nature of a particle system. Ohh
> well... had to rant a little...
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf
> Of Francois Lord
> Sent: Wednesday, May 02, 2007 4:38 PM
> To: XSI(at)Softimage.COM
> Subject: Re: Particle attraction
>
> If I'm not mistaken, this Maya force is the Newton force. Essencially
> taken from Dynamation, this force applies the laws of gravity to each
> particle so they are attracted to each other in an orbiting fashion.
>
> <OT>
> There was a great demonstration of this force in the Imax movie Cosmic
> Voyage when matter in the universe begins to form chunks after the Big
> Bang. It took a super computer several weeks (if not months) to simulate
>
> this scene. It was awsome.
> </OT>
>
> Vincent Fortin wrote:
>
>> I'd dare to say it's impossible with XSI's actual toolset. I just
>> tried inversing the particle avoidance parameter in the spdl but no
>>
> luck L
>
>> The behavior is definitely scriptable but, again, probably not worth
>> it because of the speed.
>>
>> I'd like to see something like Maya's per-vertex fields in XSI. I did
>> some bubbles once where bubbles with a size bigger than a given
>> threshold would start attracting the other bubbles around them. It's
>> surprising how fast Maya manages this when you consider that, with
>> each particle carrying its own set of force attributes, the simulation
>>
>
>
>> iterations go exponent 2.
>>
>>
>>
> ------------------------------------------------------------------------
>
>> *From:* owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] *On
>> Behalf Of *Dan Hope
>> *Sent:* Wednesday, May 02, 2007 10:02 AM
>> *To:* xsi(at)Softimage.COM
>> *Subject:* Particle attraction
>>
>> Ola Senors i Senorita(s)
>>
>> I'm trying to get particles of the same pType to attract each other
>> based on distance and wander around in small groups. I'm not animating
>>
>
>
>> teenagers with White Lightning before you ask...
>>
>> Anyone got any ideas?
>>
>> Ta
>>
>> Dan
>>
>>
>>
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>
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--
Bradley R. Gabe | Senior Creature TD | Stan Winston Studio
|
--
Bradley R. Gabe | Senior Creature TD | Stan Winston Studio
|
