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Question by ninjaboynaru · Mar 16, 2013 at 08:21 PM · raycastmouseclick

Detect if object clicked on

I have a script to detect if an object has been clicked on but when I click nothing happens

 var selectedUnits : Array = new Array();
 function Update (){
 
     if(selectedUnits.length <= 0){
     
         if(Input.GetMouseButtonDown(0)){
         
         var hit : RaycastHit;
             Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), hit);
             Debug.Log(hit.collider.tag);
 }
 }
 }
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avatar image robertbu · Mar 16, 2013 at 08:34 PM 1
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Verify the script is attached to some object. Put Debug.Log() just inside all the 'if' statements to verify where the code is failing. Since you don't have an 'if' statement around the Physics.Raycast(), then the must likely culprit is "selectedUnits.length" being > 0.

You really should put an if statement around the Raycast:

         if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), hit)) {
          Debug.Log(hit.collider.tag);
 }

If your code is getting to the raycast but is not finding anything, verify the object you are clicking on has a collider.

avatar image ArtOfWarfare · Mar 24, 2015 at 02:49 AM 0
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Thanks for the point about needing a collider. The object I was dealing with has no physical interactions with anything else, so I removed its collider thinking it wasn't necessary.

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Answer by ninjaboynaru · Mar 16, 2013 at 08:45 PM

Robertu got it right. The script was not attached to the object. Thanks for the help.

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avatar image whydoidoit · Mar 16, 2013 at 08:51 PM 0
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Just a point - you can just use

 function On$$anonymous$$ouseDown()
     {
     }


On the object being hit...

avatar image ArtOfWarfare · Mar 24, 2015 at 02:42 AM 0
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@whydoidoit: I tried that but it never fired.

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Answer by Seth-Bergman · Mar 16, 2013 at 08:32 PM

 if(selectedUnits.length <= 0){

how can the length be less than zero? start by getting rid of that line, and if that doesn't do it, make sure your object has a COLLIDER attached

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