[Sidefx-houdini-list] sucking dust into a vortex, gas sim

Robert Kelly isstuff at gmail.com
Wed Jan 23 20:18:42 EST 2013


Here is a file I made with a Little advice from Jacob Clark of gas
being sucked with divergence.

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=127650#127650


On 24 January 2013 02:26, jacob clark <jclark2900 at gmail.com> wrote:
> Hey Man,
>
>  I've been doing some of this recently. You are correct about compression.
> Houdini won't let its density fields become compressed. Use Negative
> Divergence to counter act this. Basically, create a ball of negative value
> where you want the smoke to suck into and name it divergence. You can play
> with the value of the ball to create faster and slower speeds.
>
> cheers,
> -j
>
>
> On Wed, Jan 23, 2013 at 1:12 AM, Robert Kelly <isstuff at gmail.com> wrote:
>
>> Hey Girls ans Guys..
>>
>> I am making a gas sim that sucks dust into a vortex and down a magical
>> hole. I have made a volume of vectors in sops that behaves its self
>> and sucks particles into the hole in an elegant way. When i use a gas
>> field vop that samples the sop vector field and adds it to the the
>> velocity it looks cool, the dust/ smoke just swerls around the centre
>> without crunching in as i need it to.  I believe the divergence is
>> keeping the gas from compressing or even exiting the sim.
>>
>> If the answer is to change divergence, I have not tyred to mess with
>> divergence yet so i would appreciate pointers on how to tackle that.
>> any ideas would be appreciateed.
>>
>> Robert.
>> _______________________________________________
>> Sidefx-houdini-list mailing list
>> Sidefx-houdini-list at sidefx.com
>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>>
> _______________________________________________
> Sidefx-houdini-list mailing list
> Sidefx-houdini-list at sidefx.com
> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list



More information about the Sidefx-houdini-list mailing list