Update attributes of 2 geometry in solver node

[cloudamy]

Hi,

I am a total newbie to houdini (math student trying to make some simulation here) and I wonder if there's a way that I can update attributes of 2 geometry in solver node. Basically I created a volume node and used it to represent a self-advecting vector field (I do the update in a solver node) and I want to create particles that uses this vector field as its velocity and move around the volume. I feel like this really should be a simple task but I have been stuck for several days and haven't figured out how to deal with it.

Any help will be much appreciated!

Edited July 23, 2020 by cloudamy

[eimk]

POP Advect by Volumes is probably what you're looking for

particle_advection.hipnc

[cloudamy]

On 7/23/2020 at 12:44 PM, eimk said:

POP Advect by Volumes is probably what you're looking for

particle_advection.hipnc

 

I see. This is very helpful! Although is it possible to do this if we don't convert it to vdb before the solver node? I want to determine how the vector field change myself so right now I have a wrangle node inside my solver, and I am not sure if this is still possible if we use vdb advection node instead

[eimk]

The VDB conversion and advection was just to make the volume change over time for demo purposes since I didn't have your .hip to work with. The POP Advect by Volumes node will work with any volume, so it should be fine with your wrangle.

[cloudamy]

5 minutes ago, eimk said:

The VDB conversion and advection was just to make the volume change over time for demo purposes since I didn't have your .hip to work with. The POP Advect by Volumes node will work with any volume, so it should be fine with your wrangle.

I see, thank you!