[SOLVED] (2D) Weird raycast issue

I'm using raycast to determine where to instantiate hit particles when a bullet hit an enemy's collider. This worked if I put my raycast script into my NormalShotSystem script which has a Shoot() method:

Code (csharp):

1. void Shoot()
2. {
3.   // Store anything that the ray hits in the enemyLayer here
4.   RaycastHit2D hit = Physics2D.Raycast(transform.position, transform.up, 100f, enemyLayer);
5.  
6.   // Shooting code here
7.   if (Input.GetKey(KeyCode.Space) && Time.time > fireRate + lastFire)
8.   {
9.     //Debug.DrawLine(transform.position, transform.up * 100f, Color.cyan);
10.     // Checks if the ray hits anything in enemyLayer
11.     if (hit.collider != null)
12.     {
13.       GameObject hitInstance = Instantiate(hitParticle, hit.point, Quaternion.identity) as GameObject;
14.       // Rotates the particle to direction of surface it hits
15.       hitInstance.transform.up = hit.normal;
16.       Destroy(hitInstance, 0.5f);
17.       Debug.Log("Enemy is hit!");
18.     }
19.  
20.     GameObject bulletClone = (GameObject)Instantiate(bullet, transform.position, transform.rotation);
21.     Destroy(bulletClone, 1f);
22.     lastFire = Time.time;
23.     Debug.Log("Bullet shot!");
24.   }
25. }

But I tried using this on my BulletController script which control my bullet's speed and direction and it didn't work:

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class BulletController : MonoBehaviour
5. {
6.   public int bulletSpeed;
7.   public GameObject hitParticle;
8.   public LayerMask enemyLayer;
9.  
10.   private Rigidbody2D bullet;
11.  
12.   void Start()
13.   {
14.     bullet = GetComponent<Rigidbody2D>();
15.   }
16.  
17.   void FixedUpdate()
18.   {
19.     // Store anything that the ray hits in the enemyLayer here
20.     RaycastHit2D hit = Physics2D.Raycast(transform.position, transform.up, 100f, enemyLayer);
21.  
22.     //Debug.DrawLine(transform.position, transform.up * 100f, Color.cyan);
23.     // Checks if the ray hits anything in enemyLayer
24.     if (hit.collider != null)
25.     {
26.       GameObject hitInstance = (GameObject)Instantiate(hitParticle, hit.point, Quaternion.identity);
27.       // Rotates the particle to direction of surface it hits
28.       hitInstance.transform.up = hit.normal;
29.       Destroy(hitInstance, 0.5f);
30.       Debug.Log("Enemy is hit!");
31.     }
32.  
33.     bullet.velocity = transform.up * bulletSpeed * Time.deltaTime;
34.   }
35.  
36.   void OnTriggerEnter2D(Collider2D other)
37.   {
38.     if(other.gameObject.tag == "Enemy")
39.     {
40.       Destroy(gameObject);
41.     }
42.   }
43.    
44.   void OnBecameInvisible()
45.   {
46.     Destroy(gameObject);
47.   }
48. }

What happen is hitParticles is instantiated everytime on the back of my bullet which creates a kind of particle trail and I suspect it's because I put it in FixedUpdate() so everytime it checks if hit's collider is not equal null, it will instantiate a hit particle every frame. How do I make it so the hit particles instantiate only when it hit's the enemy's collider?
Thanks.

 

i guess u need to attach a script to the bullet like this:

Code (CSharp):

1. void OnCollisionEnter2D(Collision2D other)
2. {
3. if(other.gameObject.tag == "enemy")
4. {
5. Instantiate(particles,hit.point,Quaternion.identity);
6. Destroy(gameObject);
7. }
8. }

assuming that hit is your RayCastHit2D

 

Thanks for the answer! It was such a simple fix