Ai Alien Zombies get stuck on trees?

private var hitTimmer = 1.0;

//////////////////////////////// Makes Alien Zombies Avoide Obstacles//////////////////// function Update (){

 //The direction vector to our target
 var dir = (target.position - transform.position).normalized;
 var hit : RaycastHit;
 // Check for forward raycast
 if(Physics.Raycast(transform.position, transform.forward, hit, 20)){
     if(hit.transform != transform){
         Debug.DrawLine(transform.position, hit.point, Color.red);
         dir += hit.normal * 50;
 }

}

var leftR = transform.position; var rightR = transform.position;

leftR.x -= 2; rightR.x += 2;

if(Physics.Raycast(leftR, transform.forward, hit, 20)){ if(hit.transform != transform){ Debug.DrawLine(leftR, hit.point, Color.red); dir += hit.normal 50; } } if(Physics.Raycast(rightR, transform.forward, hit, 20)){ if(hit.transform != transform){ Debug.DrawLine(rightR, hit.point, Color.red); dir += hit.normal 50; } }

var rot = Quaternion.LookRotation(dir);

var sizeOfMonster = 2.5; var groundOffset = Vector3(0,2.2,0); var newPosition = transform.position + transform.forward 1 Time.deltaTime; if (!Physics.CheckSphere(newPosition+groundOffset, sizeOfMonster)){ transform.position = newPosition; }

transform.rotation = Quaternion.Slerp(transform.rotation, rot, Time.deltaTime);

}

function OnDrawGizmosSelected () { Gizmos.color = Color.red; var sizeOfMonster = 2.5; var groundOffset = Vector3(0,2.2,0); Gizmos.DrawWireSphere (transform.position+groundOffset, sizeOfMonster); }

///////////////////////////////////////////////////

// Make sure there is always a character controller @script RequireComponent (CharacterController)

function Start () { // Auto setup player as target through tags if (target == null && GameObject.FindWithTag("Player")) target = GameObject.FindWithTag("Player").transform;

 Patrol();

}

function Patrol () { var curWayPoint = AutoWayPoint.FindClosest(transform.position); while (true) { var waypointPosition = curWayPoint.transform.position; // Are we close to a waypoint? -> pick the next one! if (Vector3.Distance(waypointPosition, transform.position) < pickNextWaypointDistance) curWayPoint = PickNextWaypoint (curWayPoint);

     // Attack the player and wait until
     // - player is killed
     // - player is out of sight     
     if (CanSeeTarget ())
         yield StartCoroutine("AttackPlayer");

     // Move towards our target
     MoveTowards(waypointPosition);

     yield;
 }

}

function CanSeeTarget () : boolean { if (Vector3.Distance(transform.position, target.position) > attackRange) return false;

 var hit : RaycastHit;
 Debug.DrawRay(transform.position, transform.forward * 30, Color.red);
 if (Physics.Linecast (transform.position, target.position, hit))
     return hit.transform == target;



 return false;

}

function AttackPlayer () { var lastVisiblePlayerPosition = target.position; while (true) { //if (CanSeeTarget ()) { // Target is dead - stop hunting if (target == null) return;

         // Target is too far away - give up 
         var distance = Vector3.Distance(transform.position, target.position);
         if (distance > attackRange * 3)
             return;

         lastVisiblePlayerPosition = target.position;
         if (distance > dontComeCloserRange)
             MoveTowards (lastVisiblePlayerPosition);

         else
             RotateTowards(lastVisiblePlayerPosition);


             //Attack player with "Attack" animation which is basically a clawing and biting animation
             //this "Attack" is supposed to inflict damage to the FPS player

         var forward = transform.TransformDirection(Vector3.forward);
         var targetDirection = lastVisiblePlayerPosition - transform.position;
         targetDirection.y = 0;


         var angle = Vector3.Angle(targetDirection, forward);
         if (distance < 3){

             var damage = 10;
             target.SendMessage("ApplyDamage", damage);

             // you probably have some other script managing there
             // animations but you'd typically at this point call
             modelAnimation.Play("Attack");
             // and you could have the attack animation on a higher
             // layer than other animations to override them.
             audio.PlayOneShot (attackSound);

             yield WaitForSeconds(2.3);


                 // Play Attack Sounds when clwaing but don't play so often
             if (Time.time > hitTimmer && attackSound && tearingFlesh){
             audio.PlayOneShot(attackSound, 1.0 / audio.volume);
             hitTimmer = Time.time + Random.Range(attackSound.length * 2, attackSound.length * 3);
             }
             else
             {
             // Play a tearing flesh sound
             audio.PlayOneShot(tearingFlesh, 1.0 / audio.volume);
             hitTimmer = Time.time + Random.Range(tearingFlesh.length * 2, tearingFlesh.length * 3);
             }
         }




         yield StartCoroutine("SearchPlayer", lastVisiblePlayerPosition);
         //Player not visible anymore - stop attacking
         if (!CanSeeTarget())

         return;


     } 

     yield;
 }

//}

function SearchPlayer (position : Vector3) { // Run towards the player but after 3 seconds timeout and go back to Patroling var timeout = 3.0;

 while (timeout > 0.0)
 {
     MoveTowards(position);

     // We found the player
     if (CanSeeTarget ())
         return;

     timeout -= Time.deltaTime;
     yield;
 }

}

function RotateTowards (position : Vector3) { SendMessage("SetSpeed", 0.0);

 var direction = position - transform.position;
 direction.y = 0;
 if (direction.magnitude < 0.1)
     return;



 // Rotate towards the target
 transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation(direction), rotationSpeed * Time.deltaTime);
 transform.eulerAngles = Vector3(0, transform.eulerAngles.y, 0);

}

function MoveTowards (position : Vector3) { var direction = position - transform.position; direction.y = 0; if (direction.magnitude < 0.5) { SendMessage("SetSpeed", 0.0); return;

 }

 // Rotate towards the target
 transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation(direction), rotationSpeed * Time.deltaTime);
 transform.eulerAngles = Vector3(0, transform.eulerAngles.y, 0);

 // Modify speed so we slow down when we are not facing the target
 var forward = transform.TransformDirection(Vector3.forward);
 var speedModifier = Vector3.Dot(forward, direction.normalized);
 speedModifier = Mathf.Clamp01(speedModifier);

 // Move the character
 direction = forward * speed * speedModifier;
 GetComponent (CharacterController).SimpleMove(direction);

 SendMessage("SetSpeed", speed * speedModifier, SendMessageOptions.DontRequireReceiver);

}

function PickNextWaypoint (currentWaypoint : AutoWayPoint) { // We want to find the waypoint where the character has to turn the least // The direction in which we are walking var forward = transform.TransformDirection(Vector3.forward);

 // The closer two vectors, the larger the dot product will be.
 var best = currentWaypoint;
 var bestDot = -10.0;
 for (var cur : AutoWayPoint in currentWaypoint.connected) {
     var direction = Vector3.Normalize(cur.transform.position - transform.position);
     var dot = Vector3.Dot(direction, forward);
     if (dot > bestDot && cur != currentWaypoint) {
         bestDot = dot;
         best = cur;
     }
 }

 return best;