Hi

I'm following along and trying to create this example according to the provided code but something is wrong with the nodes...I am getting edges but nothing rendered neither the rectangles nor the text. I tried placing the loadData in the setup position as per another user's post but that didnt seem to work. Any ideas why the thing isn't working?

sure:

int nodeCount;
Node[] nodes = new Node[100];
HashMap nodeTable = new HashMap();

int edgeCount;
Edge[] edges = new Edge[500];

static final color nodeColor = #F0C070;
static final color selectColor = #FF3030;
static final color fixedColor = #FF8080;
static final color edgeColor = #000000;

PFont font;

Node selection;

void setup () {
 size (600,600);
 
 font = createFont("SansSerif", 10);
 textFont(font);
 loadData();
 smooth();
}

void loadData () {
 /*addEdge("joe", "food");
 addEdge("joe", "dog");
 addEdge("joe", "tea");
 addEdge("joe", "cat");
 addEdge("joe", "table");
 addEdge("table", "plate");
 addEdge("plate", "food");
 addEdge("mouse", "food");
 addEdge("dog", "food");
 addEdge("mouse", "cat");
 addEdge("table", "cup");
 addEdge("cup", "tea");
 addEdge("dog", "cat");
 addEdge("cup", "spoon");
 addEdge("plate", "fork");
 addEdge("dog", "flea1");
 addEdge("dog", "flea2");
 addEdge("flea1", "flea2");
 addEdge("plate", "knife");*/
 
 String[] lines = loadStrings("huckfinn.txt");
 //Make the text into a single String object.
 String line = join(lines, " ");
 //Replace -- with and actual em dash
 line = line.replaceAll("--", "\u2014");
 
 //Split into phrases using any of the provided tokens.
 String[] phrases = splitTokens(line, ".,;:?!\u2014\"");
 println(phrases);
 for (int i = 0; i <phrases.length; i++) {
   //Make this phrase lowercase/
   String phrase = phrases[i].toLowerCase();
   //Split each phrase into individual words at one or more spaces
   String[] words = splitTokens(phrase, " ");
   for (int w=0; w<words.length-1; w++) {
     addEdge(words[w], words[w+1]);
   }
 }
}

void addEdge (String fromLabel, String toLabel) {
 Node from = findNode(fromLabel);
 Node to = findNode(toLabel);
 Edge e = new Edge(from, to);
 if (edgeCount == edges.length) {
   edges = (Edge[]) expand (edges);
 }
 edges [edgeCount++] = e;
}

Node findNode(String label) {
 label = label.toLowerCase();
 Node n = (Node) nodeTable.get (label);
 if(n==null){
   return addNode(label);
 }
 return n;
}

Node addNode (String label) {
 Node n = new Node(label);
 if (nodeCount == nodes.length){
   nodes = (Node[]) expand (nodes);
 }
 nodeTable.put(label, n);
 nodes[nodeCount++] = n;
 return n;
}

void draw () {
 background (255);
 for (int i=0; i < edgeCount; i++) {
   edges[i].relax();
 }
 for (int i=0; i < nodeCount; i++) {
   edges[i].relax();
 }
 for (int i=0; i < nodeCount; i++) {
   nodes[i].update();
 }
 for (int i=0; i < edgeCount; i++) {
   edges[i].draw();
 }
 for (int i=0; i < nodeCount; i++) {
   edges[i].draw();
 }
}

void mousePressed() {
//Ignore anything greater than this distance.
 float closest = 20;
 for (int i = 0; i<nodeCount; i++) {
   Node n = nodes[i];
   float d = dist(mouseX, mouseY, n.x, n.y);
   if (d < closest) {
     selection = n;
     closest = d;
   }
 }
 if (selection !=null) {
   if (mouseButton == LEFT) {
   selection.fixed = true;
   } else if (mouseButton == RIGHT) {
   selection.fixed = false;
   }
 }
}
 
void mouseDragged() {
 if (selection !=null) {
   selection.x = mouseX;
   selection.y = mouseY;
 }
}

void mouseReleased() {
 selection = null;
}

class Node {
 float x,y;
 float dx, dy;
 boolean fixed;
 String label;
 PFont font;
 
 
 Node(String label) {
   this.label = label;
   x = random(width);
   y = random(height);
 }
 
 void relax () {
   float ddx = 0;
   float ddy = 0;
   
   for (int j = 0; j<nodeCount; j++) {
     Node n = nodes[j];
     if (n !=this) {
       float vx = x - n.x;
       float vy = y - n.y;
       float lensq = vx*vx + vy*vy;
       if (lensq == 0) {
         ddx += random(1);
         ddy += random(1);
       } else if (lensq < 100*100) {
         ddx += vx/ lensq;
         ddy += vy/lensq;
       }
     }
   }
   float dlen = mag(ddx, ddy)/2;
   if (dlen>0) {
     dx += ddx/dlen;
     dy += ddy/dlen;
   }
 }
 
 void update () {
   if (!fixed) {
     x += constrain(dx, -5, 5);
     y += constrain(dy, -5, 5);
     
     x= constrain(x,0,width);
     y= constrain(y, 0, height);
   }
   dx /=2;
   dy /=2;
 }
 /*
 void draw (){
   if(selection == this) {
     fill (selectColor);
   } else if (fixed) {
     fill (fixedColor);
   } else{
     fill (nodeColor);
   }
   
   stroke(0);
   strokeWeight(0.5);
   rectMode(CORNER);
   float w = textWidth(label) + 10;
   float h = textAscent() + textDescent() +4;
   rect(x-w/2, y-h/2, w, h);
   fill(0);
   //font = createFont("SansSerif", 10);
   //textFont(font);
   
   textAlign(CENTER, CENTER);
   text(label, x, y);
 }*/
 
   void draw() {
   fill(nodeColor);
   stroke(0);
   strokeWeight(0.5);
   
   
   float w = textWidth(label) + 10;
   float h = textAscent() + textDescent() +4;
   rect(x-w/2, y-h/2, w, h);
 

  textAlign(CENTER, CENTER);
   text(label, x, y);
 }

}

THANKS!!!