void Awake()
{
cam = Camera.main;
offsetX = 0;
dirs [0] = new Vector3(-offsetX, 0, 0);
dirs [1] = new Vector3(Screen.width + offsetX, 0, 0);
dirs [2] = new Vector3(-offsetX, Screen.height, 0);
dirs [3] = new Vector3(Screen.width + offsetX, Screen.height, 0);
terrain = GameObject.FindGameObjectWithTag("Terrain").GetComponent <InfinitTerrain>();
}
void Start()
{
terrain = GameObject.FindGameObjectWithTag("Terrain").GetComponent <InfinitTerrain>();
}