刚体速度突然冻结

Question

I am new to unity..I am facing a problem with a moved object. I assign the gameObject a velocity but when it reaches a specific position ( 23,14, -750), the gameobject freezes. I can't know why. Sometimes it object continues moving and other times it suddenly stops. What's going wrong ? Thank you

    {
            if (transform.localPosition.z <= -760) {
                    gameObject.SetActive (false);
            }
            gameObject.rigidbody.velocity = new Vector3 (0, 0, -speed);

    } 

Answer 1

If you set an object to inactive, it will "freeze":

 if (transform.localPosition.z <= -760) {
     gameObject.SetActive (false);
 }

Not sure what you expect SetActive(false) to do but it has the result of stopping all logic including position updates and collision for the particular game object.

Answer 2

So don't make your object inactive. Save your initial position in Vector3.

 Vector3 initPosition = gameObject.rigidbody.position;

and set this value in your condition

if (transform.localPosition.z <= -760) {
 gameObject.rigidbody.position = initPosition;
}

Answer 3

This might fix the issue, when you are only providing the velocity, it freezes after sometime inevitably. The trick to keep the velocity on you must add the velocity with Time.deltatime

This will keep the rigidbody updated and the velocity wont stop.

{
        if (transform.localPosition.z <= -760) {
                gameObject.SetActive (false);
        }
        gameObject.rigidbody.velocity = new Vector3 (0, 0, -speed+Time.deltatime);

}