koobas.hobune.stream
Unity2d move enemy in opposite direction on collision
Hey guys, I can't for the love of me figure out how to move my, let's say "Spider" enemy in the opposite direction once it starts moving and collides with a .tag named "Wall".
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class SpiderController : MonoBehaviour {
public float moveSpeed;
private bool canMove;
public GameObject deatSpiderExplosion;
private Rigidbody2D myRigidBody;
//new with radius
public Transform playerCheck;
public float playerCheckRadius;
public LayerMask whatIsPlayer;
// Use this for initialization
void Start () {
myRigidBody = GetComponent<Rigidbody2D> ();
}
// Update is called once per frame
void Update () {
canMove = Physics2D.OverlapCircle(playerCheck.position, playerCheckRadius, whatIsPlayer);
if (canMove) {
myRigidBody.velocity = new Vector3 (-moveSpeed, myRigidBody.velocity.y, 0f);
}
}
//void OnBecameVisible(){
//canMove = true;
//}
void OnTriggerEnter2D(Collider2D other){
if (other.tag == "KillPlane") {
//Destroy (gameObject);
gameObject.SetActive (false);
Instantiate (deatSpiderExplosion, other.transform.position, other.transform.rotation);
}
if (other.tag == "Water") {
//Destroy (gameObject);
gameObject.SetActive (false);
Instantiate (deatSpiderExplosion, other.transform.position, other.transform.rotation);
}
}
void OnEnable(){
canMove = false;
}
}
So basically I have my spider move left once the player becomes visible. Within my world it will keep going left until it hits either the "killPlane" or "water" .tag, and it dies/gets disabled.
I've been trying to maybe make a OnCollisionEnter2D and change its x direction/movespeed to be positive, hence moving to the right, but it simply doesn't work. I don't necessarily know if it doesn't work because I put the movement into the Update function.
Any help would be much appreciated. :)
Wow... My bad, instant brain fart immediately after I posted this question. I hope my own answer helps anyone out there trying to do the same with an enemy. Within the OnTriggerEnter2D just add what I show below.
void OnTriggerEnter2D(Collider2D other){
if (other.tag == "KillPlane") {
//Destroy (gameObject);
gameObject.SetActive (false);
Instantiate (deatSpiderExplosion, other.transform.position, other.transform.rotation);
}
if (other.tag == "Water") {
//Destroy (gameObject);
gameObject.SetActive (false);
Instantiate (deatSpiderExplosion, other.transform.position, other.transform.rotation);
}
if (other.tag == "Wall") {
moveSpeed *= -1;
}
}
The -1 in my case makes the moveSpeed positive, hence moving right on the X axis, and then it will collide again, making the moveSpeed negative again, hence moving left on the X axis. :)
