How to set edge trajectory

[steveroush]

There is no way to partially position an edge. All or nothing.
Maybe this will help:

Fun with edges!

Did you know that it takes all the Graphviz engines at least 4 points to define an edge, even a straight edge? (splineType | Graphviz) Not being a mathematician, I don’t know much (anything) about cubic B-spline, so I decided to let Graphviz show me how these splines are defined. I wrote a small GVPR program (what else) to add a point-shaped node on top of every point included in an edge pos for any graph. What did I learn? After staring at hundreds of augmented graphs, splines start to mak…