check if agent reach destination

Question

I want to check if agent position reach destination. i already checked with Debug.Log, the result is (tagent.position.x==dest1.position.x && tagent.position.z==dest1.position.z) both already has the same value (see pic below, 3rd and 4th log) but "REACHED" wasn't shown on console, please help! alt text

 private NavMeshAgent agent;
     public Transform dest1, dest2, tagent;

     void Start () {
         agent = GetComponent<NavMeshAgent> ();
     }
 
     void Update () {
         if (Input.GetMouseButtonDown (0)) {
             Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
             RaycastHit hit;
             if (Physics.Raycast (ray, out hit)) {
                 if  (hit.collider.tag == "group1") {
                     agent.SetDestination (dest1.position);
                     Debug.Log ("dest "+dest1.position);
                     Debug.Log ("tagent"+tagent.position);
                     if(tagent.position.x==dest1.position.x && tagent.position.z==dest1.position.z)
                         Debug.Log ("REACHED");
                 }
             }
         }
     }

Answer 1

Best Answer

Answer by jgodfrey · Apr 07, 2016 at 06:48 PM

First, if I understand your statement and your image, the 3rd and 4th messages do not reflect the same position because the Y values are different. Oh, wait, I see you don't care about the Y value in your code, so ignore that... ;)

Second, attempting to compare floating point values for equality is a recipe for disaster. Instead of determining if 2 floating point values are exactly equal, you should see if they are "close enough". You can do that any number of ways, but here's a simple method:

 float closeEnough = 0.005;
 if (Mathf.Abs(tangent.position.x - dest1.position.x) <= closeEnough && Mathf.Abs(tangent.position.z - dest1.position.z) <= closeEnough
 {
     // the positions are within "closeEnough" distance
 }

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