Re: [graphviz-interest] How do I make 3 edges meet seamlessly at a point?

Hi John

On 31/08/14 03:53, John Ellson wrote:
 > Good question.    I thought we had a way of doing this, but the best I
 > could do today was:
 >
 > digraph Perl
 > {
 >    edge [color=grey]
 >    node [shape=oval style=filled]
 >    Carnegie [color=aquamarine]
 >    Murrumbeena [color=bisque]
 >    Oakleigh [color=blueviolet]
 >    one [width=0 height=0 fixedsize=1 label="" color=grey]
 >    Murrumbeena -> one [arrowhead=none]
 >    Carnegie -> one [arrowhead=none]
 >    one -> Oakleigh [tailclip=0]
 > }
 >
 > which still isn't perfect as you can see from the attached zoom-in image
 > of the junction.
 >
 > This attributres for node "one" still have finite pensize, so its still
 > drawing a filled oval.  If you set pensize=0 it leaves a tiny fill, but
 > there is still a gap as if the nodesize is still not really 0.

Many thanx! That's significantly better on the eye than my code.

 > Perhaps we should add a "shape=zero" that does this properly...

It used to work. I've commented more in my reply to Emden.

 > There is an edge feature called "concentrate" that sound like it should
 > do this .. but I couldn't get it to do anything.

I had not noticed that option. I'll play with it.

 > John
 >
 >
 >
 > On 08/29/2014 07:35 PM, Ron Savage wrote:
 >> Hi
 >>
 >> This is dot - graphviz version 2.38.0 (20140413.2041).
 >>
 >> The best I can do is:
 >>
 >> digraph Perl
 >> {
 >> graph [ rankdir="TB" ]
 >> node [ shape="oval" ]
 >> edge [ color="grey" ]
 >> node [ shape="oval" style="filled" ]
 >> "Carnegie" [ color="aquamarine" ]
 >> "Murrumbeena" [ color="bisque" ]
 >> "Oakleigh" [ color="blueviolet" ]
 >> "one" [ fixedsize="shape" height="0" style="invis" width="0" ]
 >> "Murrumbeena" -> "one" [ arrowhead="none" samehead="1" ]
 >> "Carnegie" -> "one" [ arrowhead="none" samehead="1" ]
 >> "one" -> "Oakleigh" [ sametail="1" ]
 >> }
 >>
 >> But this leaves a small gap at the top of the vertical edge.
 >>
 >> Is there some option which forces this gap to vanish?
 >>
 >
 >
 >
 > _______________________________________________
 > [email protected]
 > http://lists.research.att.com/mailman/listinfo/graphviz-interest
 >

-- 
Ron Savage - savage.net.au
_______________________________________________
[email protected]
http://lists.research.att.com/mailman/listinfo/graphviz-interest