I have a four-bar linkage system in Blender and I need to animate it with bones and armatures. The meshes are in the initial position to start, I just need to create the constraints to keep all 4 linkages together. Normal bone structures are serial or tree linkages, with each child bone only having 1 parent bone. As I understand it, I need a way to make 4 bones all connect together. I do not know if there is a way to have multiple parents, or if there is a way of mimicking the parallel behavior with a serial manipulator. How do you create the bone setup and vertex groups for a parallel linkage? Does this make sense?
This is the wiki page for a four-bar linkage system, in case that helps.
I see something similar here, but I don't quite get how they got to the answer. (Like a math question with an answer provided, but no work to show, as I understand it.)