How To Perform A Mouse Click On Game Object

Question

Hello,

I would like the ability to click on an object in the game play.

Eg: user clicks on cube in the game, a dialog window then pops up, or an event is triggered.

I have no person controls or anything, just a camera.

--- Snippet of Scrrpt -----

function Update () 
{
    if(Input.GetMouseButtonDown (0) && Clicked == false)
    {

This works, but I can click anywhere on the screen....

Answer 1

Best Answer

Answer by Uriel_96 · Nov 21, 2010 at 02:12 AM

try this

if ( Input.GetMouseButtonDown(0)){
var hit : RaycastHit;
var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
var select = GameObject.FindWithTag("select").transform;
if (Physics.Raycast (ray, hit, 100.0)){
select.tag = "none";
hit.collider.transform.tag = "select";
}
}

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oliver-jones · Nov 21, 2010 at 02:40 AM 0

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Okay, but what about when I want to deselect it or unclick it ... Thanks

Uriel_96 · Nov 21, 2010 at 03:33 AM 0

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good point, Im not completly sure but I will try to put an else something like this maybe: if (Physics.Raycast (ray, hit, 100.0)){}else{//Do what you want}

TheJables · Aug 13, 2012 at 04:10 PM 0

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I've been looking for a way to detect if you've clicked on a game object and if so, destroy it. However, I'm getting some errors just trying to implicitly declare var hit and var ray to the different RaycastHit and Ray structs. I assume that there's no additional using statements needed here? Is there something I might be missing? I've copied the code above as is but it doesn't seem to like the ':' after hit and ray.

kamal2013thapa · Apr 06, 2013 at 12:19 PM 0

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I am also facing same problem.When I mouse over on the object it move.But i want to move, when left mouse clicked.

kamal thapa april 6th, 2013

Answer 2

Answer by JakeElliott · Nov 21, 2010 at 02:21 AM

You can use the OnMouseDown function in a script component attached to your cube, as long as it has a collider: http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.OnMouseDown.html

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Screenhog · Aug 13, 2012 at 04:37 PM 1

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This is true, but beware that OnMouseDown (and similar functions) don't work on mobile devices. Depending on your needs, this might not be a problem, but I thought it worth mentioning anyway.

Answer 3

Answer by jharri30 · Jan 17, 2014 at 03:08 AM

I was having some issues with Uriel's code, so I tweaked it a little to simplify it. Here is the solution that worked for me.

I created a cube which had a "Box Collider" on it by default and renamed it to "targetArea". I then added a script to it with the following update statement...

 function Update ()
 {
     if ( Input.GetMouseButtonDown(0))
     {
         var hit : RaycastHit;
         var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         
         if (Physics.Raycast (ray, hit, 100.0))
         {  
             Destroy(GameObject.Find("targetArea"));
         }
     }
 }

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TSCGCobra043 · Apr 04, 2016 at 05:12 PM 0

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do you know how to do this but instead when clicked will load a new scene?

derlin TSCGCobra043 · Sep 10, 2016 at 02:10 PM 0

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Just replace Destroy(...); with the following sceneloading function.

using UnityEngine.SceneManagement; //add to top of script

SceneManager.LoadScene(string);

Stevens-R-Miller · Dec 21, 2017 at 11:06 PM 0

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Long time later, but I am a bit confused by this code. While it tests to see if the ray hit anything, it doesn't seem to query for what it hit. If you only have one collider, then a hit has to be on that collider. But what if you have two or more? How do you know which one you hit?

Answer 4

Answer by OgiJr · Dec 26, 2015 at 11:15 AM

Void OnMouseClick() { function }

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Answer 5

Answer by AlisVitae · Jun 21, 2015 at 06:02 PM

Look at our tutorial! https://www.youtube.com/watch?v=HR_88quPMog

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How To Perform A Mouse Click On Game Object

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