Ai keeps walking in a circle.

Question

So I'm making a simple script using Raycast where when my ai gets close to a wall it rotates and moves away from it. But when I test it the ai just runs in a circle. I'm fairly new to this and any help would be appreciated!

Here is the script I am using:

var speed : float = 10; var sightRange : float = 5; function Start () {

  function Update () {

      var controller = GetComponent(CharacterController);

      var velocity = speed;

      var fwd = transform.TransformDirection(Vector3.forward);

      var hit : RaycastHit;

      if(Physics.Raycast(this.transform.position,fwd,hit,sightRange));

          transform.Rotate(0,90 * Time.deltaTime,0);

      controller.Move(fwd * velocity * Time.deltaTime);

Answer 1

Best Answer

Answer by Baste · Sep 12, 2014 at 03:54 PM

You've got an extra semicolon!

 if(Physics.Raycast(this.transform.position,fwd,hit,sightRange)); <= THIS ONE!
     {
         transform.Rotate(0,90 * Time.deltaTime,0);
     }

The semicolon ends the if, and the stuff between the {} happens no matter what the content of the if-check resolves to. Remove that semicolon, and you're good.

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SynhteticWeb · Sep 13, 2014 at 04:41 AM 0

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Thanks! I'll make sure I re-read everything thrice from now on!

Answer 2

Answer by betaFlux · Sep 12, 2014 at 04:03 PM

It looks like you need to insert another condition to make sure the ray knows when it hits a wall, otherwise it returns true if it hits anything, no matter what. Something like:

 if(Physics.Raycast(this.transform.position,fwd,hit,sightRange));
 {
    if(hit.collider.tag == "wall") // or - if(hit.collider.gameObject.isStatic) - if you make the walls static
    {
       transform.Rotate(0,90 * Time.deltaTime,0);
    }
 }

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SynhteticWeb · Sep 13, 2014 at 04:44 AM 0

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Thanks this will be real helpful later when I start adding more objects.

Ai keeps walking in a circle.

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