Can a Child node have multiple Parent nodes in Collapsible Force Layout using D3

Question

I'm building a visualization similar to http://bl.ocks.org/mbostock/1093130 , with huge amount of data. I could not figure out if it is possible that a child node can have multiple parent nodes? for instance, as per the visualization shown in the previously mentioned link, can "shortestPaths" have parents "graph" as well as "optimization" ? I have looked around stackoverflow. Could not find answer that solves this problem.

Answer 1

No, it is not possible, if you rely on the example you linked to at the beginning of the question. This is because of this code:

  var nodes = flatten(root),
  links = d3.layout.tree().links(nodes);

d3.layout.tree() requires tree-like data (no multiple parents).

Of course, you can always develop entirely yours solution that will handle such cases. But you can't do it based on the example you mentioned.