Re: [Groff] Arrow between ellipses - How to chop (remove overlap) ?

[Ralph Corderoy]

Hi,

> > Try
> >
> >     arrow from E1 to E2 chop 0.3
> 
> This would have been nice .. but I need something more generic than
> that.  I got a program reading a hugin (Bayesian Network) file and
> generating the output in PIC-format.  Which results in "many"
> ellipses scattered about on a page. Some of these are connected
> (using arrows).  How do I get pic to chop the arrow correctly in BOTH
> ends.
> 
> I can't chop them using a constant, because I don't really know how
> the ellipses will be placed relative to one another.

If you're leaving the placement of the nodes up to pic then pic knows.

> > and see also the definition of chop around page 10 of Kernighan's
> > _PIC -- A Graphics Language for Typesetting_ mentioned at the end
> > of groff's pic man page.
> > <URL:http://cm.bell-labs.com/cm/cs/cstr/116.ps.gz>

Did you read this fine document?  It explains that pic's trig functions
should be used.  Will that work in your case?


Ralph.