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cwalrus

Dust Storm - particles driving clouds?

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Hi - i'm following an outdated tutorial (houdini 12 i think) on CMIVFX, and i'm stuck trying to get my particle sim to drive the velocity on my clouds. Their method doesn't work anymore with H14.

 

Any help? Basically I just want the particles to drive the velocity on billowy smoke. File is attached.

 

THanks!!!

 

cameron

 

 

 

DustStorm03.hipnc.zip

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Hey so I didn't have a lot of time to look at your hip file, but quickly built an example instead hope it helps. Basically the VDB from particles is set to velocity trail and I use it to create a VDB from the point attribute V so it gets picked up in the source volume!

 

The hip file explains it better :)

 

 

 

 

velocity_from_particles.hipnc

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Hey Carlo_c thank a lot for your Hip file, it helped me to see clearer, I'm not the author of the topic but i was wondering the same thing.  :D

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This is so great- thank you! 

 

 just wondering - Why do you need to have the Fluid Source node after the Sphere node?  Why not just source the Sphere node directly in the SourceVolume in your smokeSolver network?

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The fluid source node creates the volumes needed for the fluid sim. I don't think you can just plug the sphere directly into the Source Volume DOP node as there'd be no fields for it to work with.

 

http://www.sidefx.com/docs/houdini15.0/nodes/sop/fluidsource

http://www.sidefx.com/docs/houdini15.0/nodes/dop/sourcevolume

 

If you use the billowy smoke shelf tool on a sphere for example you'll see it creates the same setup.

Edited by carlo_c

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