Making an object move and then stop when it reaches a certain point

Scripting
1

Hi new to coding and trying to get my head around c#
I want a ball to move to a certain point at a speed and then stop

public class MoveTopLeft : MonoBehaviour {

    public float movementSpeed = 10;

    private Rigidbody rb;

    // Use this for initialization
    void Start () {
        rb = GetComponent<Rigidbody> ();
    }
  
    // Update is called once per frame
    void FixedUpdate () {
        Vector3 endPosition = new Vector3 (-8, 0, -8);
        if (transform.position = endPostion){
        transform.Translate (Vector3.back * movementSpeed * Time.deltaTime);
        }
    }
}

What do I need to change to make it stop at the endPostion point?

2

Firstly, I’d like to point out that you should be using Update, not FixedUpdate. FixedUpdate is the physics update that runs after a certain interval of time, not according to the game’s frame rate. (unless you want to be moving with physics, i see you’re doing GetComponent())

To compare two things, the boolean operator is “==” not just “=”, which I’m sure is causing you issues.

You also probably want to only move if “transform.position != endPosition” (does not equal end position), then move.

Your Translate will move the object in global -Z direction over time, but that is potentially not towards the end-vector.

Try this:

public class MoveTopLeft : MonoBehaviour {

    public float movementSpeed = 10;

    private Rigidbody rb;
    private Vector3 endPosition = new Vector3(-8, 0, -8);
    // Use this for initialization
    void Start() {
        rb = GetComponent<Rigidbody>();
    }

    // Update is called once per frame
    void Update() {
        if(transform.position != endPosition) {
            transform.position = Vector3.MoveTowards(transform.position, endPosition, movementSpeed * Time.deltaTime);
        }
    }
}

for use with physics:

public class MoveTopLeft : MonoBehaviour {

    public float movementSpeed = 10;

    private Rigidbody rb;
    private Vector3 endPosition = new Vector3(-8, 0, -8);
    // Use this for initialization
    void Start() {
        rb = GetComponent<Rigidbody>();
    }

    // Update is called once per frame
    void FixedUpdate() {
        if(rb.position != endPosition) {
            Vector3 newPosition = Vector3.MoveTowards(rb.position, endPosition, movementSpeed * Time.deltaTime);
            rb.MovePosition(newPosition);
        }
    }
}
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