class Tree  {

  Lsystem ls = new Lsystem("FF");
  RuleSet rs = new RuleSet();

  float unitsize = -5 - random(25);
  float anglechange;
  int value = 0;

  Tree()  {
    String[] rax = {
      "FF-[-F+F+F-]+[+F-F-F+]:90", "++:5", "--:5"              };
    Rule r1 = new Rule("F", rax);  

    rs.addRule(r1);
    ls.registerRuleSet(rs);
    ls.recurse(2); 
    // make sure they start with an F - ie fix the probability here...    
    while (ls.getAxiom().charAt(0) != 'F')  {
      ls.addStartF();
    }
    
    ls.setUnitsize(this.unitsize);
    ls.setAnglechange(gAnglechange);
  };

  void draw() {
    float ac = (gAnglechange * gGlobalAngleNess) + (this.anglechange * (1 - gGlobalAngleNess));
    ls.setAnglechange(ac);
    ls.render();
  };
}