I'm working on a SPH (particle fluid) splash that needs to be highly directable. I'd like to implement a “sculpted” or “scripted” force to drive the particle fluid, along the lines of a scripted daemon in Realflow. So basically, defining a force through straight-up math, or by math derived from the placement of some control objects/curves/etc. My guess is that one way to do this is through the VOP Force node, but my experience with VOPs is pretty limited, and the VOP Force doesn't seem to have any examples.

Can anyone point the way to some examples (or offer alternative suggestions)? I have a feeling I'm about to find out how deep the rabbit hole goes.