ArrayList tree = new ArrayList();

void setup()
{
  size(700,700);
  background(0);
  stroke(255);
  smooth();
  //noLoop();
  
  //Generate Tree
   branch(-1, width/2, height-50, 150, 90, 1);
}


void draw()
{
  //background(0);
  fill(0,0,0,100);
  rect(0,0,width,height);
  //Draw tree
    DRAWtree();
    //Node s= (Node) tree.get(1);
    //s.setA(mouseX);
    //s= (Node) tree.get(0);
    //s.setRX(mouseX); s.setRY(mouseY);
    mess();
    Altertree();
}


void branch(int p, float rx, float ry, float d, float a, int L)
{
  float nx, ny;
  int indexhold;
  
  if(L < 10)
  {
    //Calculate and draw branch
      nx=rx+d*cos(-1*radians(a));
      ny=ry+d*sin(-1*radians(a));
    
    //Add to Arraylist 
      indexhold=tree.size();
      tree.add(new Node(indexhold, p, rx, ry, a, d));
    
    //Recurse
      branch(indexhold, nx, ny, d*.7, a+random(10,25), L+1);
      branch(indexhold, nx, ny, d*.7, a-random(10,25), L+1);
  }

}//END branch

void DRAWtree()
{
  float x, y;
  
  for(int i=0; i<tree.size(); i++)
  {
    Node n= (Node) tree.get(i);
    
    x=n.getRX()+n.getD()*cos(-1*radians(n.getA()));
    y=n.getRY()+n.getD()*sin(-1*radians(n.getA()));
    
    line(n.getRX(), n.getRY(), x, y);
    
  }
}//END DRAWtree

void mess2()
{
  for(int i=0; i<tree.size(); i++)
  {
    Node n= (Node) tree.get(i);
    
    n.setPARENT(int(random(0,tree.size())));
  }
}

void mess()
{
  for(int i=0; i<tree.size(); i++)
  {
    Node n= (Node) tree.get(i);
    
    //n.setA(n.getA()+random(-1*mouseX/100,mouseX/100));
    //n.setA(n.getA()+random(-1*mouseX/100,mouseY/100));
    n.setA(n.getA()+random(-5,5));// something horrifically frantic about this
  }
}

void Altertree()
{
  float x, y;
  
  for(int i=0; i<tree.size(); i++)
  {
    Node n= (Node) tree.get(i);
    
    if(n.getPARENT() >= 0)
    {
      Node n2= (Node) tree.get(n.getPARENT());
      n.setRX(n2.returnx());
      n.setRY(n2.returny());        
    }
  }
}//END Altertree

class Node
{
  int me;
  int parent;
  float rx;
  float ry;
  float a;
  float d;
  
  Node(int me_, int parent_, float rx_, float ry_, float a_, float d_)
  {
    me=me_;
    parent=parent_;
    rx=rx_;
    ry=ry_;
    a=a_;
    d=d_;
  }

  void setME(int me_){me=me_;}
  int getME(){return me;}
  void setPARENT(int parent_){parent=parent_;}
  int getPARENT(){return parent;}
  
  void setRX(float rx_){rx=rx_;}
  float getRX(){return rx;}
  void setRY(float ry_){ry=ry_;}
  float getRY(){return ry;}
  void setA(float a_){a=a_;}
  float getA(){return a;}
  void setD(float d_){d=d_;}
  float getD(){return d;}
  
  float returnx()
  {
     return rx+d*cos(-1*radians(a));
  }  
  float returny()
  {
     return ry+d*sin(-1*radians(a));
  }
}