How to make a 4 point path follow an object at either end? (How to make a fake node graph)?

Question

I am trying to simulate a node graph like this where a path with 4 points (start, 2 middle, end) adapts to the movement of an object connected to the start and end:

If you move a node at the link above you can see this demonstrated. So far I've followed this tutorial using a beam but this is 2 points - not 4 - with no support for curved paths.

How can I simulate this node graph effect?

Answer 1

This is a tricky one to do without plugins. I've used ConnectLayersPro to achieve this kind of thing, with the curves set to Step mode:

If anyone knows how to do it using expressions (and maybe the built in Beam plugin?) I'd love to know.