Thanks, just after writing it occurred to me that it's of course not just a tree.

But I also need it to be ranked by phases, that's where the time-axis comes in.

This "rank" requirement (or was it "grade") already includes acyclic, otherwise this wouldn't be possible. I think this is an even narrower requirement than just DAG.

Anyway talking about it helped me sketching my own algorithm already... :)

I searched DAG with graphviz, but couldn't see them ranked in phases and the nodes were all circles (I have practically no hands-on experience with graph-viz)

> automate creating images of them without edges having to cross each other, etc.

Really? I have doubts it's always possible to draw a planar graph.

consider a 3d-cube, how do you want to draw a planar graph without crossings - here x ? 

    0
  / | \
 /  |  \
A   B   C
|\ / \ /|
| x   x |
|/ \ / \|
a   b   c
 \  |  /
  \ | /
    1

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^2: Visualizing a dependency graph in a web page by LanX
in thread Visualizing a dependency graph in a web page by LanX

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