So here's what I'm trying to do: the yellow part A in the picture below swings back and forth, and piece C is attached to it via the bolt B (C needs to swing around this bolt). Part C travels throught the hole in part D, and it am just trying to find a way to contrain C so that it STAYS in the hole when I move part A. I tried pinning C to B, and that places C on the bolt, but I cannot find a way to make it stay in the hole in D. All I want is some kind of 'always point at this hole' constraint. Most coincident constraints make it so the whole mechanism won't move at all.
Also, I'd like to have the sprint compress as C moves in and out of the hole, if that is possible.
Also, I'd like to have the sprint compress as C moves in and out of the hole, if that is possible.