Trying to stop a RigidBody that is moving

i gave a rigidbody a velocity at void start(), and i want it to stop once it reaches a certain point in the screen.
tryed doing rb.velocity = Vector3.zero and such, but couldnt find any thing thet worked even after searching the forum.

Code (CSharp):

1. void Start()
2.     {
3.         changedSpeed = false;
4.         rb = GetComponent<Rigidbody> ();
5.         if (this.tag == "Boss") {
6.             rb.velocity = transform.forward * speed;
7.             ///////
8.         } else {
9.             rb.velocity = transform.forward * speed;
10.         }
11.     }
12.  
13.     void FixedUpdate ()
14.     {
15.         if (this.tag == "Boss") {
16.             rb = GetComponent<Rigidbody> ();
17.             if ((rb.position.z <= 13.5) && (changedSpeed == false)) {
18.                 string messege = string.Format("position z = {0}, speed = {1}", rb.position.z, rb.velocity.ToString());
19.                 Debug.Log (messege);
20.                 rb.velocity = Vector3.zero;
21.                 rb.angularVelocity = Vector3.zero;
22.                 rb.angularDrag = 0;
23.                 messege = string.Format("position z = {0}, speed = {1}", rb.position.z, rb.velocity.ToString());
24.                 Debug.Log (messege);
25.                 changedSpeed = true;
26.             }
27.         }
28.     }

 

Well your object should stop when you set velocity to zero. Are you adding force anywhere else? Do you have any friction? Are your Debug.Log called?

As a last resort you could set rb.isKinematic to true. When you want you object to move again, you will need to set it back to false

 

ohh S***, i saved the starting speed in another script and inputed velocity there.... thanks!