Physics.OverlapSphere - do an action only if there are no other gameobjects with tagX around

Question

Hello there!

I try to cast a sphere around a hit.point and identify, whether there are already other objects within that sphere with a specific tag (XMark). If not, an object should be spawned. Does Physics.OverlapSphere maybe not work if instantiated objects? Or am i getting it wrong? From what i find on the internet this should work :-/ Maybe anyone of you can give me a hint how i can do it right?

Thanks a million!

Here is the Code:

   MarkXPosition = hit.point;
    
                 // Physics.OverlapSphere(center, radius);
                 Collider[] MarkXFindSphere = Physics.OverlapSphere(MarkXPosition, 5f);
                 Debug.Log("Checking if XMarks exist closeby ");
 
                 foreach (Collider Test in MarkXFindSphere)
                 {
                     if (Test.gameObject.tag != ("XMark"))
                     {
                         Debug.Log("No XMarks found nearby, spawning one");
                         Instantiate(XMark, MarkXPosition, XMark.transform.rotation);
                     }
 
                     else
                     {
                         Debug.Log("An XMark already exists nearby! Not spawning XMark");
                     }
 
                 }

Answer 1

Answer by glatteinfo · Sep 29, 2021 at 08:40 PM

I guess I found a solution: just in case someone has a simular problem I'm posting it here. The code seems to check for all objects without the tag and spawns one Object for each of them. So I helped myself with adding a counter whenever one object was found with the tag the instantiate wouldnt run since the counter isn't 0 anymore.

 MarkXPosition = hit.point;
 
                 // Physics.OverlapSphere(center, radius);
                 Collider[] MarkXFindSphere = Physics.OverlapSphere(MarkXPosition, 2f);
                 Debug.Log("Checking if XMarks exist closeby ");
 
                 foreach (Collider Test in MarkXFindSphere)
                 {
                    
                     if (Test.gameObject.tag == ("XMark" ))
                     {
                         XmarkAmount = XmarkAmount +1;
                         return;
                     }
                     else
                     {
                         XmarkAmount = 0;
                     }
   
                 }
 
                 if (XmarkAmount == 0)
                 {
                     Debug.Log("No XMarks found nearby, spawning one");
                     Instantiate(XMark, MarkXPosition, XMark.transform.rotation);
                 }

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bdubbert · Sep 29, 2021 at 09:15 PM 0

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It seems like the "else XmarkAmount = 0" part shouldn't be there, otherwise if the last object returned isn't an Xmark it will always spawn an xmark

glatteinfo bdubbert · Sep 30, 2021 at 05:02 AM 0

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your absolutely right, thanks!!

Physics.OverlapSphere - do an action only if there are no other gameobjects with tagX around

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