Enemy walks through walls

Questions & Answers
1

Hi unity. I have an following script on my enemy, and he just walks through the walls even the colliders didn’t work, anyone have one solution?

var target : Transform; 
var moveSpeed = 3;
var rotationSpeed = 3;
var myTransform : Transform; 

function Awake(){
    myTransform = transform; 
}

function Start(){   
    target = GameObject.FindWithTag("Player").transform; 
}

function Update () {

var dist = Vector3.Distance(target.position, myTransform.position);
    
    var lookDir = target.position - myTransform.position;

    lookDir.y = 0;

    myTransform.rotation = Quaternion.Slerp(myTransform.rotation,

    Quaternion.LookRotation(lookDir), rotationSpeed*Time.deltaTime);
   
    if(dist > 2.4){
        myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;

    }
}
2

You are editing the transform directly. This will always ignore any collision. If you want collision, you have to use forces.

3

As above, you are setting the position directly which will override the physics.

note - Unity - Scripting API: Rigidbody.velocity

(This says you shouldnt modify velocity directly; it works fine for me but bear that in mind if you try it!)

Assuming your enemy has a rigidbody attached, you could try using ‘velocity’ instead.
(So rather than moving the position frame by frame - including specifying a position in the wall; you just set the velocity and the physics engine handles the rest.)

Try replacing

myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;

with:

myTransform.rigidbody.velocity = Vector3(lookDir.normalized * moveSpeed * Time.deltaTime);