MapBorder

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MapBorder : MonoBehaviour {

	private void OnDrawGizmos()
	{
		Gizmos.DrawWireCube(borderCenter, borderSize);
	}
	public enum DropOption
	{
		None
		, Respawn
		, Destroy
	}
	public DropOption dropOption = DropOption.Respawn;

	public Vector3 borderCenter = Vector3.zero;
	public Vector3 borderSize = new Vector3(200,100,200);
	public Transform respawnPoint;
	Vector3 firstPosition;
	Quaternion firstRotation;
	// Use this for initialization
	void Start ()
	{
		firstPosition = transform.position;
		firstRotation = transform.rotation;
	}
	
	// Update is called once per frame
	void Update () {

		var pos = transform.position;
		pos.x = Mathf.Clamp(pos.x, borderCenter.x - borderSize.x, borderCenter.x + borderSize.x );
		pos.y = Mathf.Min(pos.y, borderCenter.y + borderSize.y );
		pos.z = Mathf.Clamp(pos.z, borderCenter.z - borderSize.z , borderCenter.z + borderSize.z);



		transform.position = pos;
		if (transform.position.y<borderCenter.y- borderSize.y )
		{
			switch (dropOption)
			{
				case DropOption.None:
					break;
				case DropOption.Respawn:
					if (respawnPoint == null)
					{
						transform.position = firstPosition;
						transform.rotation = firstRotation;
					}
					else
					{
						transform.position = respawnPoint.transform.position;
						transform.rotation = respawnPoint.transform.rotation;
					}
					break;
				case DropOption.Destroy:
					Destroy(gameObject);
					break;
				default:
					break;
			}
		}
	}
}