Target closet object with tag and get transform?

Question

What I'm trying to do is detect if the object with a certain tag is within range and if it is rotate the gun to face the targeted object. What I have now works on 1 object by name, but can't figure out how to detect the object if it has another name. I have tried to use findobjectswithtag but am having no luck.

 using UnityEngine;
 using System.Collections;
 
 public class LaserLook : MonoBehaviour {
 
     public Transform target;
     public float objectDistance;
     public float rotationDamping;
 
     void Start () {
 
         target = GameObject.Find ("Random Material").GetComponent<Transform> ();
 
     }
 
     void Update () {
 
         objectDistance = Vector3.Distance (target.position, transform.position);
 
         if (objectDistance < 20f) 
         {
             lookAtPlayer();
         }    
     }
 
     void lookAtPlayer()
     {
         Quaternion rotation = Quaternion.LookRotation (target.position - transform.position);
         transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * rotationDamping);
     }
 }

Answer 1

Best Answer

Answer by Positive7 · Mar 16, 2016 at 08:45 PM

  using UnityEngine;
     using System.Collections;
     
     public class Test : MonoBehaviour
     {
     
         public GameObject[] target;
         public float objectDistance;
         public float rotationDamping;
     
         void Start()
         {
     
             target = GameObject.FindGameObjectsWithTag("Enemy");     //It will look for all objects tagged as "Enemy"
     
         }
     
         void Update()
         {
             for (var i = 0; i < target.Length; i++)
             {
                 objectDistance = Vector3.Distance(target[i].transform.position, transform.position);
     
                 if (objectDistance < 20f)
                 {
                     lookAtPlayer();
                 }
             }
         }
     
         void lookAtPlayer()
         {
             for (var i = 0; i < target.Length; i++)
             {
                 Quaternion rotation = Quaternion.LookRotation(target[i].transform.position - transform.position);
                 transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * rotationDamping);
             }
         }
     }

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Sskethan · Mar 17, 2016 at 12:14 AM 0

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Thank you, this works perfectly.

Sskethan · Mar 17, 2016 at 12:46 PM 0

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Ok, I ran into a problem with this code. The code works great if there is only 1 object with tag, but if there are multiple objects the axis no longer points at the object I'm flying toward. Here is a video capture of whats happening. The Random $$anonymous$$aterial on the left and the Random Object on the right both have the same tag. When I fly toward one the axis points away from the object ins$$anonymous$$d of toward. Not sure what the problem here is. Please help. Thank you. link text

Positive7 Sskethan · Mar 17, 2016 at 03:01 PM 0

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Hmm... the code should look for the closest object so it should work, but I'll double check it

Positive7 Sskethan · Mar 17, 2016 at 03:44 PM 0

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Try this :

 using UnityEngine;
 
 public class LaserLook : $$anonymous$$onoBehaviour
 {
     public float rotationDamping;
     public float objectDistance;
     public GameObject[] target;
 
     GameObject FindClosestAsteroid()
     {
         target = GameObject.FindGameObjectsWithTag("Asteroid");
         GameObject closestTarget = null;
         var distance = $$anonymous$$athf.Infinity;
         var position = transform.position;
         foreach (GameObject go in target)
         {
             Vector3 distanceDiff = go.transform.position - position;
             float curDistance = distanceDiff.sqr$$anonymous$$agnitude;
             if (curDistance < distance)
             {
                 closestTarget = go;
                 distance = curDistance;
             }
         }
         return closestTarget;
     }
 
     void Update()
     {
         var distanceFromTarget = Vector3.Distance(transform.position, FindClosestAsteroid().transform.position);
         if (objectDistance > distanceFromTarget)
         {
             RotateLaser();
         }
         else {
             RotateLaserDefault();   //Reset Laser position to zero
         }
     }
 
     void RotateLaser()
     {
             Quaternion rotation = Quaternion.LookRotation(FindClosestAsteroid().transform.position - transform.position);
             transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * rotationDamping);
     }
     void RotateLaserDefault() {
         transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.identity, Time.deltaTime * rotationDamping);
     }
 }

Sskethan · Mar 17, 2016 at 11:44 PM 0

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Yes. Thank you sooo much. Now it is working the way it should.

Target closet object with tag and get transform?

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