Re: [graphviz-interest] Crossing vs. edge length

John Ellson:

> > Is  there  a  way  to  tell graphviz to prefer a
> > slightly longer edge to four  additional  cross-
> > ings?   In  the attached examle (for dot.exe), I
> > want the edge from ep12 to INTOBJ1 to  go  round
> > the "DB1 Tables" column from the left, so as not
> > to cross any edges.
> >
> > Sorry for the messy code, I'll appreciate advice
> > on cleaning it up.
>
> One,  inelegant  trick is to add an invisible node
> as a waypoint for the edge.

Thank you for the reply.  After several attempts  at
this, I have failed to produce useful results with a
waypoint, and a question about  gv's  behaviour  has
arisen.   In  the attached example, INTEXPOBJ is the
last element in DB1 Tables.  I want to add  waypoint
WP below it via:

            INTEXPOBJ -> WP1 [weight=1]

but  this  rearranges the column's nodes.  Why?  You
can check it yourself by uncommenting line 42.

The other edges in the column have a zero weight  so
that  gv  can allocate them as it thinks best, but I
don't think attachiing a dandling node  at  the  end
should cause the re-arranging anyway...

> I  also  suggest  reversing  some  edges and using
> [dir=back] instead of forced edges to :e ports.

Following your suggestion produces slightly  differ-
ent  results:  the edge no longer joins the node ex-
actly at the ceter.

-- 
()  ascii ribbon campaign - against html e-mail
/\  www.asciiribbon.org   - against proprietary attachments

_______________________________________________
[email protected]
http://lists.research.att.com/mailman/listinfo/graphviz-interest