how to detect mouse click on a gameobject.

Questions & Answers
1

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

Super Collapse Puzzle Gallery 2 - Free Online Games | GameFools

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

3

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.

7

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")
    {
    }
}
4

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…

2

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);
}
6

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: ");    					
				}
			}    
		}
5

function OnMouseDown(){

	this.gameObject.renderer.material.mainTexture = texture;//guiTexture = texture;

}

8

If someone is still facing the issues so you can check this article https://gamedevsolutions.com/detect-mouse-click-on-gameobject/

Hope it will be helpful for someone, Let me know if you are facing any issues we can discuss that here or in the blog comment section.