VOP Force Question

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This is probably a stupid newbie question: I'm trying to create some custom forces for rigid body simulations. I've created a VOP Force node that simply multiplies the input position by (100, 100, 100) and outputs that as the force (project attached). It appears to apply the impulse at the initial frame then stop.

I think I may need to set the output force's parameter to “Set Always” - as per the Houdini help, but for the life of me, I can't figure out how to do this.

Any help would be greatly appreciated, thanks in advance,

Simon

Attachments:
vop_force.hipnc (286.5 KB)

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Aha - fixed it myself. Look like my objects were sleeping: if I give them either an initial velocity or set the RBD solver's “sleeping time” to zero, my prototype radial gravity works!

Simon

Attachments:
vop_force.hipnc (290.7 KB)

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