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Question by Albert-han · Jun 25, 2014 at 12:21 PM · airandomwander

Random Wander Ai

Hi guys i've been using a script for my ai but it is just nonsense.randomly walk around a place (school) in my case without colliding with another person or wall but now it go through walls even with box collider and cant change direction when going to hit something.Does anybody know how to implement those features.thanks Here's my current script.

     var Speed= 20;
     var wayPoint : Vector3;
     var Range= 10;
      
     function Start(){
     //initialise the target way point
     Wander();
     }
      
     function Update()
     {
     // this is called every frame
     // do move code here
     transform.position += transform.TransformDirection(Vector3.forward)*Speed*Time.deltaTime;
     if((transform.position - wayPoint).magnitude < 3)
     {
     // when the distance between us and the target is less than 3
     // create a new way point target
     Wander();
      
      
     }
     }
      
     function Wander()
     {
     // does nothing except pick a new destination to go to
      
     wayPoint= Vector3(Random.Range(transform.position.x - Range, transform.position.x + Range), 1, Random.Range(transform.position.z - Range, transform.position.z + Range));
     wayPoint.y = 1;
     // don't need to change direction every frame seeing as you walk in a straight line only
     transform.LookAt(wayPoint);
     Debug.Log(wayPoint + " and " + (transform.position - wayPoint).magnitude);
     }
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Answer by bobin115 · Sep 08, 2014 at 10:15 AM

try this. #pragma strict

 /// <summary>
 /// Creates wandering behaviour for a CharacterController.
 /// </summary>
 @script RequireComponent(CharacterController)
  
     var speed:float = 5;
     var directionChangeInterval:float = 1;
     var maxHeadingChange:float = 30;
  
     var heading: float=0;
     var targetRotation: Vector3 ;
  
     function Awake (){
  
         // Set random initial rotation
         transform.eulerAngles = Vector3(0, Random.Range(0,360), 0);  // look in a random direction at start of frame.
  
         //StartCoroutine
         NewHeadingRoutine ();
     }
  
     function Update (){
         var controller : CharacterController = GetComponent(CharacterController);
  
         transform.eulerAngles = Vector3.Slerp(transform.eulerAngles, targetRotation, Time.deltaTime * directionChangeInterval);
         var forward = transform.TransformDirection(Vector3.forward);
         controller.SimpleMove(forward * speed);
     }
  
     /// <summary>
     /// Repeatedly calculates a new direction to move towards.
     /// Use this instead of MonoBehaviour.InvokeRepeating so that the interval can be changed at runtime.
     /// </summary>
     while (true){
         NewHeadingRoutine();
         yield WaitForSeconds(directionChangeInterval);
     }
  
     /// <summary>
     /// Calculates a new direction to move towards.
     /// </summary>
     function NewHeadingRoutine (){
         var floor = Mathf.Clamp(heading - maxHeadingChange, 0, 360);
         var ceil  = Mathf.Clamp(heading + maxHeadingChange, 0, 360);
         heading = Random.Range(floor, ceil);
         targetRotation = new Vector3(0, heading, 0);
     }
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