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flip interior emitter and velocity

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Hi all,

How can I emit from the interior of an object into a flip object with sop level velocity. The shelf tool "Emit Particle Fluid" creates a Fluid Source SOP and a SourceVolume combo but I can't find if I can set it to emit from the interior instead of just the surface. I know I can create a volume of particles through the intial data tab on the FlipObject node but I want to constantly emit, not just on the first frame and I'm not sure how to inject velocities using this method.

Thanks

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In case someone else is looking for this,

I've managed to emit from a volume instead of the surface by using the "Sample Volumes" Method on the Fluid Souce node and using an isooffset in between my geo and fluidsource. I'm still not sure about the reasoning of this but it seems to work.

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An isooffset allows you to scatter throughout the source volume, including the interior space. Without the isooffset you are only scattering points on the source surface.

Edited by Atom
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I thought that Volume Source was sourcing a volume from the Fluid Source node but I think I'm still confused about what an SDF is and how it works. 

While we're on the subject, I ended up using PointsFromVolume after the isooffset and set the FluidSource method to Stamp Points. I found that this way is simpler if you want to set custom velocities on the points and pass them through the same SourceVolume in DOPs. Hope this helps someone.

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You don't need to do a iso offset before the points from volume. The pointsFromVolume will convert your geo to a a volume for you.  

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