hi, i'm using houdini 8.1
i want to create a simulation of a hanging obj. i go to dop network, create rbd obj,solver,gravity and then add rbd constraint, but why can't i animate the constraint position? i tried to keyframe it but has no effect.
thanx.

You have to set the goal point to be “moving”. By default, it's only set at the start of the simulation otherwise.