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