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Question by Dan205 · Dec 22, 2012 at 03:42 PM · c#collidersonmousedown

OnMouseDown Problem With Colliders

Hi, I have a problem when using the code below in a c# script:

 void OnMouseDown () {
 PlayerPrefs.SetString("object_" + objectName,"Off");
 }

This code works well when I click on an object with collider, but doesn't work on an object without one. I understand this, but is there any possible way to register a mouse clicking on an object without a collider? Thanks in advance, Dan205

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Answer by falsaform · Dec 22, 2012 at 07:41 PM

No, OnMouseDown requires a collider.

"OnMouseDown is called when the user has pressed the mouse button while over the GUIElement or Collider."

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

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Answer by PixelFireXY · Dec 22, 2012 at 07:42 PM

I dont know if there are other way to use OnMouseDown function without colliders, but you can attach collider to gameobject and check IsTrigger voice to not make collisions. I hope that help you =)

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Answer by hexagonius · Nov 14, 2014 at 01:51 PM

I think the only way to do this without would be something like this:

  • Write your own Input Manager that reacts to OnMouseDown().

  • Create your own detection shapes, let's say a rectangle, that you define for every touchable object
    • could be transparent sprite Gameobjects attached as children and removed on start

  • Transform their corner points into screen space and add them to a list with the objects you want to check touch on

  • Check if Input.MousePosition fits in one of those and call a function

P.S. by only saving the extends you could calculate it from the current transform position transformed into screen to get a moving rectangle without physics or anything

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