anyway to ensure that A gameobject dose not choose to move to a position if it was occupied by another ?

Questions & Answers
1

I’m using an Array of gameobject to designate points in the 3D world, and then i want an NPC gameobject to move to one of these points at random after reaching one of them, my problem is that I do not want the gameobject to choose one of these points as it finale destination if it was occupied by another point.

public class EnamyShipAI : MonoBehaviour {

    public float moveSpeedforward;

    GameObject[] movePointone = new GameObject[3];

	// Use this for initialization
	void Start () {

      movePointOne = GameObject.FindGameObjectsWithTag("MovePoint");
     
	}
	
	//Update is called once per frame
	void Update () {

        transform.position = Vector3.MoveTowards(transform.position,
                                  movePointOne[0].transform.position,
                                  moveSpeedforward * Time.deltaTime);

    }
}

I was thinking of before the moving gameObject, it will choose one point at random, mark it as occupied so other Instantiated objects cannot choose it, then move to it, a point dose not go back choosable till the occupied object has moved.

but i’m not sure where to start to coding that idea.

2

You could do an “occupied” idea.

In a separate script, you would just have 1 public variable called “occupied”, essentially: public bool occupied;

Then, for example reasons, lets say you had called that script “PointChecker”, so in your main script here, in update, you would do something like:
//create a temp variable to store a random number based on the size of the “point” array
int loc = Random.Range(0, movePointone.Length - 1);

//Check if occupied
if(movePointone[loc].GetComponent<PointChecker>().occupied == false){
//move to location
transform.position = Vector3.MoveTowards(transform.position,
                                   movePointOne[loc].transform.position,
                                   moveSpeedforward * Time.deltaTime);
//Set this spot to "occupied"
movePointone[loc].GetComponent<PointChecker>().occupied == true
}

(C#, untested code)

Another way you could do it is checking if that spot has a child, so it would be something like:
//create a temp variable to store a random number based on the size of the “point” array
int loc = Random.Range(0, movePointone.Length - 1);

    //Check if occupied by parents, children
    if(movePointone[loc].transform.childCount == 0){
    //move to location
    transform.position = Vector3.MoveTowards(transform.position,
                                       movePointOne[loc].transform.position,
                                       moveSpeedforward * Time.deltaTime);
    //Set this spot to "occupied"
    transform.parent = movePointone[loc].transform;
    }

(C#, untested code)