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graph-layout

Clim 1.1
Lucid 4.1

We are using the CLIM grapher and have found an unpleasant feature of
the node layout algorithm when :merge-duplicates is t.  We have graphs
which are very difficult to read the way they are formatted.  For
example, a-->b, a-->c, a-->d, b-->c, b-->d, c-->d (i.e. everything is
a parent of everything to the right of it) and a-->b, a-->d, b-->c,
c-->d both display as a--b--c--d.

What I've done so far is to supply an arc drawer which adds a small
random number to the to-y position of the arc, so that the arcs are
not exactly collinear.  This helps, but it would be nice to be able to
use the same dithering on the actual positions of the nodes.  Does
anyone have any suggestions for how to control node placement in CLIM
1.1 graph formatting?

Thanks
Adam Carlson
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