I’ve manged to be able to drive a stoke sim with velocities converted from hair tangents as shown in your Splines As Distribution And Velocity Sources video. Sweet functionaily. But I’d like to use the same spline to hair to velocities from within a Pflow Stoke Field Follow. Surely this is possible? I’ve managed to assign the PRThair (with magmaModifier converting tangents to velocity) as a field node object in the stoke field follow operator, but the velocity channel doesn’t show up in the velocity dropdown in the field follow operator. What else do I have to do to make this kind of thing work?
The only case where I could imagine the PFlow operator refusing to use the Stoke Field Magma object as input would be if there was a circular dependency (Stoke object already using the PFlow for something else). But in that case, picking the object via the pick button would refuse the pick the object.
For a quick test, I did this:
Created some Spline (as a stand-in for a hair strand)
Added an animated Noise modifier to give it some motion
Created a PRT Hair from it
Created a Stoke Field Magma
Added a PVelocitySplat from the Tangent channel, output multiplied by 30.0 as Velocity, picked PRT Hair as the InputParticles, and connected the Position for sampling.
Created a PFlow around the same area with a large emitter within the Field.
Replaced the Speed operator with a Stoke Field Follow
Picked the Stoke Field Magma as the source - the Velocity appeared as it should.
Set the Birth operator to emit 20K particles on frame 0
Set Display to Lines
Moved the time slider - the particles followed the tangents of the spline and started floating around…
But I’d like to use the same spline to hair to velocities from within a Pflow Stoke Field Follow. Surely this is possible? I’ve managed to assign the PRThair (with magmaModifier converting tangents to velocity) as a field node object in the stoke field follow operator, but the velocity channel doesn’t show up in the velocity dropdown in the field follow operator. What else do I have to do to make this kind of thing work?