I currently have this graph implemented and I'm hoping to keep the structure and collapsibility while depicting a child node having multiple parents. Is there a way to do this? I looked into force graphs but I'm also wanting to preserve a set hierarchy (meaning a parent at level 1 can have a child and level 3 shown). After a lot of research and tinkering with my current code, I am unable to figure my issues out. Is there anyone who has any experience with displaying a D3 tree node with multiple parents?
Just in case anyone was wondering what I did to answer my question. I ended up making a force diagram behave in the same manner as a tree. This provided me the possibility of having multiple parents and I just had to do some fiddling with how the diagram used forces in order to preserve hierarchy.
来源：https://stackoverflow.com/questions/32727855/displaying-a-d3-tree-with-multiple-parents