Enemy moving in a random direction

Questions & Answers
1

In my game, I have an enemy which should be moving randomly. First it’s chosing a random direction, than is starting moving to that direction. When it’ll hit a “wall” (maze) it should change the direction, again (randomly). Here is my code in which when hits a “wall” it returns to the same direction.

    public Vector3 target;
	public float speed=10f;
	int direction = 1;
	void  Start (){
		target = Random.insideUnitSphere * 5;
		transform.Rotate(target);
	}
	void FixedUpdate() {
		rigidbody2D.MovePosition(rigidbody2D.position + ((Vector2)(transform.forward * speed * Time.deltaTime * direction)));
	}
	void OnCollisionEnter2D (Collision2D coll){
		Debug.Log ("hit.");
	if (coll.gameObject.tag == "maze" || coll.gameObject.tag == "coin"){	
			if (screenPos.x < Screen.width / 2){
				direction *= -1;	
				Debug.Log ("change_2.");
			}
		}
	}

Can somebody help me fix this?

2

Your problem is at line 15:

direction *= -1;

That jsut switches the direction to backwards. Run the code inside your Start method again when you hit something so you pick a new random direction.

Also, use Update, not FixedUpdate.