画面をつついた先に当たったモノがなにか調べる
if(Input.GetButtonDown("Fire1")){
var hit : RaycastHit;
var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
if (Physics.Raycast(ray,hit)){
if(hit.collider.gameObject.name == "Michiru"){
}
}
else{
//print("not hit");
}
}