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Nondeterminism in Efficient Sugiyama

Mar 12, 2010 at 8:48 PM

I have noticed that certain sets of nodes appear to be non-deterministic in terms of their layouts.  For instance, the test set SugiyamaTester13.gml constantly changes (or actually alternates between a few) layouts when the "Relayout" button is repeatedly pressed.

I'm not sure, as I don't totally follow the math, but I didn't think there was supposed to be non-determinism in the algorithm.  Perhaps someone smarter than I am can enlighten me.

I'm not sure this is a bug...  but it kind of feels like one...