hi
i am trying to teach myself processing(and programming) and I am getting hung up on something - I'm trying to use values from a TSV file and feed them into a force directed layout graph I found here:

http://www.cricketschirping.com/weblog/?p=545

I have been attacking it from various angles but I can't seem to overcome the impasse. I think that I'm not too far off...here's the buildgraph function[I find that if I comment out the edges portion the app compiles I just get nothing on screen which makes me think that the problem is somewhere in that part...]:

Graph buildRandomGraph() {
 Graph g;
 int nNodes = rowCountAVT-1;
 int nEdges = 2;
 g = new Graph();

 for (int row=1; row<rowCountAVT; row++) {
    //String diet = animalValuesTable.getString(row,15);
    float weight = animalValuesTable.getFloat(row,1);
    String common = animalValuesTable.getString(row,0);
   
    ForcedNode n = new ForcedNode(new Vector3D(W/4 + random(W/2), H/4 + random(H/2), 0));
    n.setLabel(common+"");
    n.setMass(weight);
    g.addNode(n);
  }
 
 for (int i=0; i<nEdges; i++) {
   Node a = (Node)g.getNodes().get((int)random(g.getNodes().size()));
   Node b = (Node)g.getNodes().get((int)random(g.getNodes().size()));
   if (a != b && !(g.isConnected(a,b))) {
     SpringEdge e = new SpringEdge(a, b);
     e.setNaturalLength(random(10));
     g.addEdge(e);
   }
 }
 
 return g;
}

and for the whole sh-bang go here:
http://friedmanstudios.ca/chimera_obscura/processing/GraphLayout_animals/applet/

i think i solved that...now I am getting edges...but no nodes?

here's the latest version:


http://friedmanstudios.ca/chimera_obscura/processing/GraphLayout_animals2/applet/

I have culled most of the edges (removed 2200) just to rule out the possibility that the sheer number of edges might cause performance issues:

weightedEdgesTable = new Table("weightexperiment-02.txt");
rowCountWET = weightedEdgesTable.getRowCount();
 
for (int row=0; row<rowCountWET-2200; row++) {