Bug report (IsaViz 3.0 alpha): No influence on graph layout

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Bug report (IsaViz 3.0 alpha): No influence on graph layout

Christoph Lange-4

Dear IsaViz developers,

  I'm using IsaViz Build 20061026, as retrieved from
http://www.lri.fr/~pietriga/IsaViz/, and I would like to have an influence on
the graph layout generated by "suggest layout". I don't know much about
GraphViz, but I guess it should be possible to specify some additional
arguments to "dot", or to modify the dot file created by IsaViz before "dot"
is called. In my graph, with several hundreds of nodes and edges, it is
extremely hard to trace edges or to distinguish different edges, even if they
are differently colored. Therefore, I'd like to influence the layout of the
edges somehow.

Thanks in advance,

Christoph

--
Christoph Lange, Jacobs Univ. Bremen, http://kwarc.info/clange, ICQ# 51191833


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Re: Bug report (IsaViz 3.0 alpha): No influence on graph layout

Emmanuel Pietriga-2

You can indeed influence the layout *to some extent*. In order to do  
that, you would have to add additional instructions to the temporary  
DOT file generated by IsaViz in class RDFLoader. However, I'm not  
sure you can influence the path taken by edges. I think you can  
influence the position of nodes, but the geometry of edges ? I'm not  
sure. You'd have to take a look at GraphViz's DOT documentation [1].

[1] http://www.graphviz.org/Documentation.php

Another solution would be to modify the graphical objects created by  
the SVG import module (you can change the geometry of all objects,  
including splines). What option constitutes the best solution (or is  
even feasible) highly depends on the kind of modifications you want  
to make to the edges and nodes. Could you be more specific about that?

Emmanuel


On 13 avr. 07, at 16:48, Christoph Lange wrote:

>
> Dear IsaViz developers,
>
>   I'm using IsaViz Build 20061026, as retrieved from
> http://www.lri.fr/~pietriga/IsaViz/, and I would like to have an  
> influence on
> the graph layout generated by "suggest layout". I don't know much  
> about
> GraphViz, but I guess it should be possible to specify some additional
> arguments to "dot", or to modify the dot file created by IsaViz  
> before "dot"
> is called. In my graph, with several hundreds of nodes and edges,  
> it is
> extremely hard to trace edges or to distinguish different edges,  
> even if they
> are differently colored. Therefore, I'd like to influence the  
> layout of the
> edges somehow.
>
> Thanks in advance,
>
> Christoph
>
> --
> Christoph Lange, Jacobs Univ. Bremen, http://kwarc.info/clange,  
> ICQ# 51191833
>

--
Emmanuel Pietriga
INRIA Futurs - Projet In Situ    tel : +33 1 69 15 34 66
Bat 490, Universit√© Paris-Sud    fax : +33 1 69 15 65 86
91405 ORSAY Cedex FRANCE     http://www.lri.fr/~pietriga