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Question by wx3labs · Apr 19, 2016 at 08:21 PM · physicscollider

OnMouseDown() not firing, even though attached to collider under mouse.

I have a game object with a component attached with this code:

 void OnMouseDown()
 {
 Debug.Log("Mouse down");
 }

Clicking on it in the game does nothing. So I created a test component that does a raycast from the mouse, lists the colliders it hits, and sends those colliders a "OnMouseDown" message when I press F1:

 void Update()
 {

     if (Input.GetKeyDown(KeyCode.F1))
     {
         ListRaycasts();
     }
 }

 private void ListRaycasts()
 {
     Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
     RaycastHit[] hits;
     hits = Physics.RaycastAll(ray);
     int i = 0;
     while (i < hits.Length)
     {
         RaycastHit hit = hits[i];
         Debug.Log(hit.collider.gameObject.name);
         hit.collider.gameObject.SendMessage("OnMouseDown");
         i++;
     }
 }

When I press F1 while over the object, I see the object listed and its OnMouseDown method fires. Why doesn't it fire when I click?

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Answer by Naphier · Apr 19, 2016 at 10:39 PM

Is it set to be a trigger?

http://docs.unity3d.com/ScriptReference/MonoBehaviour.OnMouseDown.html

This function is not called on objects that belong to Ignore Raycast layer. This function is called on Colliders marked as Trigger if and only if Physics.queriesHitTriggers is true.

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avatar image wx3labs · Apr 20, 2016 at 03:01 PM 0
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No, the colliders are not triggers.

avatar image Naphier wx3labs · Apr 20, 2016 at 03:18 PM 0
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No. 1 reason that On$$anonymous$$ouseDown doesn't work ;)

avatar image wx3labs Naphier · Apr 20, 2016 at 03:20 PM 0
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Wait, so colliders have to be triggers to get the event? That seems the opposite of what the docs say "This function is called on Colliders marked as Trigger if and only if Physics.queriesHitTriggers is true."

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