Layouts & Renderers, Gu to Px & vice-versa

[Ged Robinson <robinson.ged AT gmail.com>]

Hi,

Great library.  I love it.

I've come a long way since starting to use Graphstream and it's really doing useful things for me.

I am extending SpringBox layout.

My subclass of SpringBox overrides particleMoved method and 'remembers' a trail for specific nodes, identified by their id.

It also implements LayerRenderer in and I then can setForeLayoutRenderer on the view, with the custom layout object.

The idea is to leave a trail of n points behind a given node as it moves around the graph.

I'm having difficulty with something I thought would be very simple.

How can I reliably convert the graph units from particleMoved (I'm assuming they are graph units in there, right?) to pixels coordinates in my render method?

The view has a camera controller associated with it and can be zoomed & panned by the user at any time.

I thought this would be easy, but I'm not finding it so.

Any help would be greatly appreciated.  

Br,

Ged