• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
  • Help Room /
avatar image
0
Question by DustinBoyle · Feb 21, 2017 at 10:42 PM · findgameobjectswithtagfindwithtag

continuously Find closest with tag, in update.

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;
 }

}

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

2 Replies

· Add your reply
  • Sort: 
avatar image
0

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;
     }
 


Comment
Add comment · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image
0

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; }

Comment
Add comment · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

The best place to ask and answer questions about development with Unity.

To help users navigate the site we have posted a site navigation guide.

If you are a new user to Unity Answers, check out our FAQ for more information.

Make sure to check out our Knowledge Base for commonly asked Unity questions.

If you are a moderator, see our Moderator Guidelines page.

We are making improvements to UA, see the list of changes.



Follow this Question

Answers Answers and Comments

95 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Find with tag not working 2 Answers

checking if gameobject exists 1 Answer

How can I count the number of prefab clones? 0 Answers

NullReferenceException randomly occurs 2 Answers

Object reference not set to an instance of an object. Dynamic target change. 1 Answer

  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges