How do detect when an Object is touched

Questions & Answers
1

I have a bomb and want it to explode when touched. I just tried implementing this with ray-casting but something isn’t working. I’m using unity 2d settings.

Also I’m programming this on a computer(of course) so is there some setting I have to set to make it recognize mouse clicks as touches?

#pragma strict
var explosion:GameObject;


function Update () {
	for (var i = 0; i < Input.touchCount; i++) {
		if (Input.GetTouch(i).phase == TouchPhase.Began) {
		
			// Construct a ray from the current touch coordinates
		    var pos:Vector3 = Camera.main.ScreenToWorldPoint (Input.mousePosition);
		    var hitInfo:RaycastHit2D = Physics2D.Raycast(pos, Vector2.zero);
		    if (hitInfo != null && hitInfo.collider != null) {
		        Debug.Log ("I'm hitting "+hitInfo.collider.name);
		        var whatsHit:GameObject = hitInfo.collider.gameObject;
		        
		        if(whatsHit.CompareTag("bomb")){
		        	whatsHit.GetComponent(BombScript).Explode(whatsHit.transform.position);
		        }
		    } else {
		    	Debug.Log("hitting nothing");
		    }
		}
	}
}

function Explode(pos:Vector3){
	GameObject.FindGameObjectWithTag("GameController").GetComponent(BombSpawner).spawnBomb = true;
	Instantiate(explosion, pos, Quaternion.identity);
	Destroy (this.gameObject);
}
2

You mean something like the third example on this page:

???