OnCollisionEnter is not called in unity

Question

I checked nearly every answer for this, but those were mostly simple errors and mistakes. My problem is that OnCollisionEnter is not called even when colliding whith other r

Answer 1

You just need attach script to the same object, whose need detects the collision.

Answer 2

because you misstyped class name of parameter. this makes no error also not works. eg:

OnCollisionEnter(Collider other) //this is wrong
OnCollisionEnter(Collision other) //this is correct

Answer 3

Try this

http://docs.unity3d.com/Documentation/ScriptReference/Collider.OnCollisionEnter.html

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
  void OnCollisionEnter(Collision collision) {

    foreach (ContactPoint contact in collision.contacts) {
        Debug.DrawRay(contact.point, contact.normal, Color.white);
    }

    if (collision.relativeVelocity.magnitude > 2){
        audio.Play();        
    }

  }
}

Answer 4

You need to make sure that the collision matrix (Edit->Project Settings->Physics) does not exclude collisions between the layers that your objects belong to.

Unity Docs

You also need to make sure that the other object has : collider, rigidbody and that the object itself or either of these components are not disabled.

Answer 5

Here is what I do:

1. Make sure that object you wish to collide with target has non-kinematic rigidbody and mesh collider. My hitter object is a cube and just change its collider to mesh collider
2. On mesh colider inspector make sure you enable convex. Please see more mesh collider inspector detail here

Now your OnCollisionEnter works. I hope this helps you.

Answer 6

Are you using 2D colliders and rigidbodies? If so use this function instead of OnCollisionEnter

void OnCollisionEnter2D(Collision2D coll)
    {
        Debug.Log(coll.gameObject.tag);

    }