Ian Farnsworth

http://www.tokeru.com/cgwiki/index.php?title=HoudiniDops#Emit_packed_prims_into_RBD_sim [www.tokeru.com] << For rigid bodies

http://www.tokeru.com/cgwiki/index.php?title=HoudiniDops#Grain_emitted_noodles [www.tokeru.com] << For noodles

For FEM / Cloth it might be a bit trickier, but I would probably just create all the copies before you sim and activate them over time.

I think you need a direction vector, not a position…

i@hit = intersect(1, @P, DirPoint-@P, v@NewPointLoc, NewPointUV);

I may the direction backwards – try @P-DirPoint if that doesn't work.

Using attributes on the incoming geometry instead of relying on the groups works really well.