Blending velocity from attributeTransfer in POPs

[mightcouldb1]

I have a RBD sim that I am using to generate the velocity that I want to advect particles through. I know that the "Advect by volumes" POP has a velocity blend feature, but I believe that it only works with volumes.

I want to be able to add other forces to affect the particles, while still having influence from the attributeTransfer velocity.

The particles seem to clump to the objects too much, and the distance in the attributeTransfer isnt giving me what I want.

How can I blend the velocity?

Thanks!

[Macha]

Smooth SOP?

[pclaes]

You can either lookup the velocity using pointclouds. Inside of a vop pop, this will probably be the fastest method. (And you can use pointclouds in pops if the input of the pointcloud is coming from outside pops ie sops.)

If you bring in the velocity, perhaps bring it in as a "rbd_velocity" attribute, rather than "v". You can then blend your transferred "rbd_velocity" with the "v" of your particles inside a vop pop and define how much you want to mix.

Or you can convert your rbd into a velocity volume and use that to look up velocity inside sops. This is a lot slower, but I find working and manipulating volumes quite a useful intermediate step.

[mightcouldb1]

For the velocity volume from point velocity, is it the method using gasParticleToField as shown in this thread: gasParticleToField Example.

Thanks for your help, the VOP POP method is working well.

[pclaes]

You can do it that way (but then you have to go through dops - it is probably the easiest way).

Or you can build the volume within a vopsop too.

Described here:

http://www.peterclaes.be/tutorials/pct_0007.pdf