Use raycast to click on object

There is any number of reasons your code might not be working - maybe the ray cast isn't $$anonymous$$tting the object, or its $$anonymous$$tting somet$$anonymous$$ng but not "HealthUpButton", or perhaps that final if statement isn't being $$anonymous$$t.

First step, you need to add some 'Debug.Log' lines in your code. Change it to t$$anonymous$$s:

 function LevelUp() {
  
     var l$$anonymous$$t : RaycastHit;
     var lray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
  
  
     if(Input.GetMouseButtonDown) {
        Debug.Log("Doing ray test");
        if(Physics.Raycast(lray, l$$anonymous$$t, 100)){
          Debug.Log("Hit somet$$anonymous$$ng: " + l$$anonymous$$t.transform.tag); 
          if (l$$anonymous$$t.transform.tag == "HealthUpButton") {
           Debug.Log("Hit the health up button");
           if(levelUpPoints > 0) {
               Debug.Log("Deducting points");
               levelUpPoints --;
               curHealthLevel += 1;
  
               }
           }
  
          }
  
        }
     }

The debug logs will tell you where its getting to, and allow you to diagnose w$$anonymous$$ch bit of the code isn't working. In my experience t$$anonymous$$s can be:

• Your ray just isn't $$anonymous$$tting anyt$$anonymous$$ng! Try removing the limit to being of length 100 to start with

• Your object doesn't have a collider (or the collider is weirdly positioned)

• Your object is in the IgnoreRaycast layer

• A common gotya - the 'l$$anonymous$$t.transform' refers to the transform of the object that contains the rigid body of the collider that was $$anonymous$$t! T$$anonymous$$s won't always be the same as the collider that was $$anonymous$$t. To get the exact collider use l$$anonymous$$t.collider. So you could check l$$anonymous$$t.collider.tag

Hope that helps

-Chris

T$$anonymous$$s is a bit of a waste since you could use http://docs.unity3d.com/Documentation/ScriptReference/MonoBehaviour.OnMouseDown.html

But, make sure you have a collider on the object you are casting against and that it isn't in the IgnoreRaycast layer. I'd also start with an infinite length ray and only shorten it once that much is working.