OnTriggerEnter2D not working

This is a script for moving platforms in a platformer game, the platform are supposed to turn around when hitting a trigger collider, but for some reason it doesn't work. The trigger is an empty with a box collider 2D, when I tried to make it a normal collider and interact with the player, it didn't work either, so maybe that is the problem, but I have no idea on what's exactly wrong with that

Code (CSharp):

1. using System.Collections;
2.     using System.Collections.Generic;
3.     using UnityEngine;
4.    
5.     public class MovingObject : MonoBehaviour {
6.    
7.         [SerializeField]public Vector2 velocity;
8.         int direction=1;
9.  
10.         void Update ()
11.         {
12.             transform.Translate(direction * velocity * Time.deltaTime);
13.         }
14.  
15.         void OnTriggerEnter2D(Collider2D trigger){
16.             if(trigger.gameObject.layer==12){
17.                 direction=-direction;
18.             }
19.         }
20.  
21.     }
22.  

 

Add a log statement to make sure the method is actually getting called in the first place:

Code (CSharp):

1.         void OnTriggerEnter2D(Collider2D trigger){
2.             Debug.Log("OnTriggerEnter2D called");
3.             if(trigger.gameObject.layer==12){
4.                 direction=-direction;
5.             }
6.         }

 

I already tried that. The method isn't called at all. I also tried to make the box collider bigger to check if maybe that was the problem, but still didn't work.

 

Is there a Rigidbody2D on the collider or the platform? I haven't done any 2D stuff in Unity but I know you need Rigidbodies to make colliders work in 3D.

 

Yeah that was the issue. I thought that the rigidbody wasn't needed for trigger collisions, but it looks like you do. Thanks