how to detect mouse click on a gameobject.

Question

I have an assignment and I am lacking idea in this regard. I am surely a new bee and eagerly waiting for the help.

http://www.gamefools.com/onlinegames/free/supercollapsepuzzlegallery2.html

Please see the game

By looking at this game I got two ideas, one is to use cubes(with rigidbody and colliders attached) and other is to use the GuiTexture. If using cubes, I am think that how to detect the mouse click on individual cube and if using GuiTexture than how to know whether something is below or not.

Please help me

Answer 1

Best Answer

Answer by Pysassin · Jan 03, 2013 at 09:56 PM

As far as the cube method goes you can use a simple mouse over function and ignore the raycasting entirely. look something like...

 function OnMouseOver(){
    if(Input.GetMouseDown(0){
       // Whatever you want it to do.
    }
 }

That is for JS though the method could easily be ported to C# as well.

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tenthplanet0 · Jan 04, 2013 at 07:24 AM 1

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Pysassin thanks.... your code really worked....

But one thing is that its not Input."Get$$anonymous$$ouseDown" but Input."Get$$anonymous$$ouseButtonDown"

Anyway lots of thanks

olehsmazhnov · Nov 17, 2013 at 01:08 PM 1

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u forgot ")" after "if(Input.Get$$anonymous$$ouseDown(0)" so it should be ... if(Input.Get$$anonymous$$ouseDown(0) ) ... thanks

Gaming-Dudester · Sep 27, 2015 at 04:11 PM 0

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Hey how do u make it to where it only works on a certain tag?

Jeffdibson · May 14 at 11:09 PM 0

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I had the same question, and this worked for me. Here's the C# version: void OnMouseOver() { if (Input.GetMouseButtonDown(0)){ //whatever you want to do here } }

Answer 2

Answer by sampathcse16 · Oct 29, 2019 at 07:47 PM

You can use the below script to identify the mouse click on particular game object.

 void Update()
  {
         //Check for mouse click 
         if (Input.GetMouseButtonDown(0))
         {
             RaycastHit raycastHit;
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             if (Physics.Raycast(ray, out raycastHit, 100f))
             {
                 if (raycastHit.transform != null)
                 {
                    //Our custom method. 
                     CurrentClickedGameObject(raycastHit.transform.gameObject);
                 }
             }
         }
  }
 
 public void CurrentClickedGameObject(GameObject gameObject)
 {
     if(gameObject.tag=="something")
     {
     }
 }

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Answer 3

Answer by Maulik2208 · Jan 04, 2013 at 08:41 AM

 void OnMouseUp()
 {
   /*Do whatever here as per your need*/
 }
 
 As well as you can use 
  
 void OnMouseDown()
 {
   /*Do your stuff here*/
 }

USe this link to get more info regarding mouse related function---->link text

If found useful then don't forget to mark the answer.......

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raptorkwok · Oct 27, 2014 at 09:26 AM 0

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It requires Collider to be added to Game Object beforehand

Answer 4

Answer by shigidaMark · Jan 03, 2013 at 06:53 PM

This will check each frame if there is something under the mouse. Then it checks if it is a cube (via tag). If so you could manipulate the cube using hit.collider.gameObject (such as changing it's forward/backward position, size, material, etc.):

 function Update(){
      var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
      var hit : RaycastHit;
      if(Physics.Raycast(ray,hit)){
           if(hit.collider.tag == "clickableCube"{
                //hit.collider.gameObject now refers to the 
                //cube under the mouse cursor if present
           }
      }
 }

As for the GUITexture, you can just use that in the OnGUI function to replace the mouse cursor:

 var crosshair : Texture;
 function Start(){
      Screen.showCursor = false;
 }
 function OnGUI(){
      var pos = Input.mousePosition;
      GUI.DrawTexture(Rect(pos.x-crosshair.width/2,pos.y-crosshair.height/2,crosshair.width,crosshair.height),crosshair);
 }

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tenthplanet0 · Jan 03, 2013 at 07:19 PM 0

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Can you show me how can I make this game using only GuiTexture? Please shigda$$anonymous$$ark.... and lot of thanks Sir

tenthplanet0 · Jan 03, 2013 at 07:43 PM 2

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I am getting this error message for hit variable...

Use of unassigned local variable `hit'

raptorkwok · Oct 27, 2014 at 09:29 AM 0

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the code won't even compile. Failed.

Answer 5

Answer by lemonyama · Jul 29, 2015 at 03:36 PM

Updated script for this which should work okay:

 if (Input.GetMouseButtonDown (0)) {    
             var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
 
             if (Physics.Raycast(ray, out hit, 100)) {
                 // whatever tag you are looking for on your game object
                 if(hit.collider.tag == "Trigger") {                         
                     Debug.Log("---> Hit: ");                        
                 }
             }    
         }

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TheNewNerd · Jan 10, 2017 at 07:03 AM 0

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Use " var ray = Camera.main.ScreenPointToRay(Input.mousePosition);" ins$$anonymous$$d of " var ray = Camera.current.ScreenPointToRay(Input.mousePosition);" I got an error with the second line of code but using "main" got rid of the error.

how to detect mouse click on a gameobject.

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