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

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();        
    }

  }
}