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Layouts & Renderers, Gu to Px & vice-versa

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  • From: Ged Robinson <robinson.ged AT>
  • To: graphstream-users AT
  • Subject: Layouts & Renderers, Gu to Px & vice-versa
  • Date: Wed, 20 May 2015 15:38:17 +0300


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.  



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