continuously Find closest with tag, in update.

Question

How can I continue to update the closest object with tag? I want to know what object is closest at all times, but it never changes, just sets the closest once and it stays at the same spot.

I appreciate any help here. Thanks

using UnityEngine; using System.Collections; using UnityEngine.Networking;

public class ESportBallMovement : MonoBehaviour {

 GameObject[] ballWayPoints;

 GameObject closest;
 private Vector3 targetPos;
 float distance = Mathf.Infinity;
 public float speed;
 float step;

 void Start()
 {
     ballWayPoints = GameObject.FindGameObjectsWithTag("ballWaypoint");
     step = speed * Time.deltaTime;
 }

 void Update () 
 {
     FindClosestWaypoint ();

     //sets the target position and moves toward it
     targetPos = (closest.transform.position);    
     transform.position = Vector3.MoveTowards (transform.position, targetPos, step);
 }

 GameObject FindClosestWaypoint() 
 {
     //populates the array of ballWaypoints
     foreach (GameObject ballWayPoint in ballWayPoints) 
     {
         //finds the distance between ball and the ballWaypoints
         Vector3 diff = ballWayPoint.transform.position - transform.position;
         float curDistance = diff.sqrMagnitude;

         //finds the closest ballWaypoint
         if (curDistance < distance) 
         {
             closest = ballWayPoint;
             distance = curDistance;
         }
     }
     Debug.Log (" Current Waypoint:" + closest.name);
     return closest;
 }

}

Answer 1

Answer by TheyLeftMe4Dead · Feb 24, 2017 at 04:33 AM

The problem is in your FindClosestWaypoint method. I would add a variables called smallestDistance and get rid of line 31 completely. I would change your if statement to...

  if (diff < smallestDistance) 
     {
     closest = ballWayPoint;
     smallestDistance = diff;
     }

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Answer 2

Answer by DustinBoyle · Feb 24, 2017 at 06:40 PM

Thanks for the reply @TheyLeftMe4Dead, I ended up finding the solution, I was never resetting the distance. Here is the code with the fix. GameObject FindClosestWaypoint() { //reset distance distance = Mathf.Infinity; //populates the array of ballWaypoints foreach (GameObject ballWayPoint in ballWayPoints) { //finds the distance between ball and the ballWaypoints Vector3 diff = ballWayPoint.transform.position - transform.position; float curDistance = diff.sqrMagnitude; //finds the closest ballWaypoint if (curDistance < distance) { closest = ballWayPoint; distance = curDistance; } } //Debug.Log (" Closest:" + closest.name); return closest; }

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continuously Find closest with tag, in update.

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