[SOLVED] CollisionEnter/Exit doesn't work

Hi guys,

Imagine you have a city with a lot of cars, but these cars can move through another car and you want to change the speed to avoid this.

What I tried to do:
1. Find the distance between the current car and the next car, but I don't think this is the best idea so I tried method 2.

2. Unsing collider: I created a script: SpeedChange and I attached to every car, but it doesn't work. Can you help me ?

Code (CSharp):

1. public class SpeedChange: MonoBehaviour
2. {
3.     private void OnCollisionEnter(Collision collision)
4.     {
5.         this.GetComponent<CarManager>().speed = 14f;
6.         Debug.Log("OnColisionEnter");
7.     }
8.  
9.     private void OnCollisionExit(Collision collision)
10.     {
11.         this.GetComponent<CarManager>().speed = 40f;
12.         Debug.Log("OnColisionExit");
13.     }
14. }

 

the first thing I thought, doesnt have your car collider set to trigger? and have your car rigidbody?

 

Thank you, the RigidBody and Trigger was the problem.

To work I had to add Mesh Collider to my terrain, do you know why Terrain Collider doesn't work?

 

terrain collider looks like it need terain data to work, i never try to create it but you can see how it work when you create new Terrain from unity menu - GameOjbect - 3DObject - Terrain. But using mesh collider is ok.