Re: [Gramps-users] Relationship Graph layout

[Benny M. <ben...@gm...>]

2010/3/8 Peter Hewett <gr...@he...>:
>
> Often I find that the relationship graph doesn't get the layout quite right,
> giving crossed lines.  That is, the order of the older generation isn't
> correct, meaning the relationship lines cross, making the graph more difficult
> to read and looking messy.
>
> This is for running a relationship graph on a filter.
>
> Is there something I am doing wrong, or is there something I can do to fix
> this?  Or is it a bug?

Gramps is not making the graph itself, but creates a dot file, which
is used by graphviz to create the graph.
Info on graphviz: http://www.graphviz.org/

This project offers way to edit the created dot files: dotty, see
http://www.graphviz.org/Documentation.php
So with dotty, you can change how the graph looks after gramps has created it.

To create a better dot file that does not need changes after creation
with gramps, would mean we need some specific examples of graphs that
go bad. Then we might find a way to produce a dot file that avoids the
crossing lines. We want to avoid however to try to specify too much in
the graph files. It is better to have a generic dot file that graphviz
interprets the best it can.

There are some other dot editors out there:
http://tintfu.sourceforge.net/

Note that for gramps 3.2 there is an experimental view to see trees
made with graphviz inside of Gramps:
http://gramps-project.org/wiki/index.php?title=Graph_View
Note the _experimental_ !

As to know what is perhaps possible:
http://stackoverflow.com/questions/2271704/family-tree-layout-with-dot-graphviz/
Note the crossing lines as soon as marriages are taken into account.

Benny