class Nodewalker{
  Vec3D position;
  Node currentNode;
  Node nextNode;
  int age;
  float size;
  ArrayList nodes;
  
  Nodewalker(){
    currentNode = new Node();
    nextNode = new Node();
    position = new Vec3D();
    nodes = new ArrayList();
    age=0;
    size=0;
  }
  
  Nodewalker(ArrayList nodes){
    this.nodes = nodes;
    int n = nodes.size();
    int selCurrent = constrain((int)random(n),0,n-1);
    this.currentNode=(Node)this.nodes.get(selCurrent);
    this.nextNode=this.currentNode.chooseNeighbor();
    this.position = new Vec3D(currentNode.position);
    age=(int)random(10);
    size=4;
    
    }
  
  void update(){
    if (age<10) position.addSelf(nextNode.position.sub(currentNode.position).scale(0.1f));
    if(age==10){
      
      currentNode=nextNode;
      position = new Vec3D(currentNode.position);
      nextNode=currentNode.chooseNeighbor();
      
      }
    if(age>10){
      size=0.4f*age;
      }
      if(age>20){
      size=16-0.4f*age;
      }
      if(age>30){
        size=4;
        age=0;
        }
      
    
    age++;
    }
  
    void draw(){
      pushMatrix();
      translate(position.x,position.y,position.z);
      box(size);
      popMatrix();
     
      }
  
  }