var punchSpeed = 1;
  var punchHitTime = 0.2;
  var punchTime = 0.4;
  var punchPosition = new Vector3 (0, 0, 0.8);
  var punchRadius = 1.3;
  var punchHitPoints = 1;
  
  var punchSound : AudioClip;
  
  private var busy = false; 
  
  function Start ()
  {
          animation["punch"].speed = punchSpeed;        
  }
  
  function Update ()
  {
          var controller : ThirdPersonController = GetComponent(ThirdPersonController); 
          if(!busy && Input.GetButtonDown ("Fire1") && controller.IsGroundedWithTimeout() && !controller.IsMoving())
          {        
                  SendMessage ("DidPunch");
                  busy = true;
          }
  }
  
  function DidPunch ()
  {
          animation.CrossFadeQueued("punch", 0.1, QueueMode.PlayNow);
          yield WaitForSeconds(punchHitTime);
          var pos = transform.TransformPoint(punchPosition);
          var enemies : GameObject[] = GameObject.FindGameObjectsWithTag("Enemy");
          
          for (var go : GameObject in enemies)
          {
                  var enemy = go.GetComponent(EnemyDamage);
                  if (enemy == null)
                          continue;
                          
                  if (Vector3.Distance(enemy.transform.position, pos) < punchRadius)
                  {
                          enemy.SendMessage("ApplyDamage", punchHitPoints);
                          // Play sound.
                          if (punchSound)
                                  audio.PlayOneShot(punchSound);
                  }
          }
          yield WaitForSeconds(punchTime - punchHitTime);
          busy = false;
  }
  
  function OnDrawGizmosSelected ()
  {
          Gizmos.color = Color.yellow;
          Gizmos.DrawWireSphere (transform.TransformPoint(punchPosition), punchRadius);
  }
  
  @script RequireComponent(AudioSource)