Remove previous clones

Questions & Answers
1

Hey,

I'm a total Unity beginner, and I was wondering how to remove a clone when a new one is instantiated. I want to create a platform under the player when he jumps and the fire button is pressed, but I want the previous platform I created to disappear. Here's my code:

var prefab : Transform;

function Update () {

    var controller : CharacterController = GetComponent(CharacterController);

    if (!controller.isGrounded) {
        if (Input.GetButtonDown ("Fire1")) {
            Instantiate (prefab, 
                         GameObject.Find("Player").transform.position,
                         Quaternion.identity);              
        }
    }
}
2

You need to store a reference to the prefab when you created it. Then you destroy that object before creating a new one (and storing it again). You also need to 'null' check to ensure that it exists (as it won't the first time).

var prefab : Transform;
private var platform : Transform;

function Update ()
{
   var controller : CharacterController = GetComponent(CharacterController);

   if (!controller.isGrounded)
   {
      if (Input.GetButtonDown ("Fire1"))
      {
         if ( platform != null )            // does a platform exist
            Destroy(platform.gameObject);              // destroy the platform
         platform = Instantiate (prefab, GameObject.Find("Player").transform.position, Quaternion.identity);
       }
   }
}

Let me know if any of this is unclear (or doesn't work - it's untested)