void createThrowable(string l, bool isTrace)
{
GameObject t = Instantiate(throwable_prefab) as GameObject;
t.transform.parent = this.transform;
t.transform.localPosition = new Vector3(spriteRenderer.bounds.extents.x, 0, 0);
Throwable th = t.GetComponent <Throwable> ();
th.Init();
th.setLetter(l);
th.setTrace(isTrace);
//if it's a trace, launch it
if (isTrace)
{
throwable = th;
th.launch(throwable_angle, transform.position);
}
}
