Champ Coda - 2007-06-20

Hello,

I would like to use GiNY to visualize a social network, and have authored a trivial app to get the 'feel' for Giny visualization pipeline.

The problem I am having is that I cannot get any of the layout classes (specifically ForceDirectedLayout, FRLayout, ISOMLayout, JUNGSpringLayout) to work; This is my stack dump:

Exception in thread "main" java.lang.NullPointerException
    at giny.util.ISOMLayout.getISOMVertexData(ISOMLayout.java:191)
    at giny.util.ISOMLayout.adjustVertex(ISOMLayout.java:154)
    at giny.util.ISOMLayout.adjust(ISOMLayout.java:140)
    at giny.util.ISOMLayout.advancePositions(ISOMLayout.java:109)
    at giny.util.ISOMLayout.doLayout(ISOMLayout.java:58)
    at MyGiny.createGraph(MyGiny.java:146) <--- THis is the line with .doLayout() call.

Thanks in advance for any light you can shed on this.

Champ.