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

public class ScreenEdgeChecker : MonoBehaviour { 
 
    // inspector settings 
    public Rigidbody rigidBody; 
    public bool destroyWhenOffscreen = false; 
    // 
 
    // Use this for initialization 
    void Start () { 
        // start periodically checking for being off-screen 
        InvokeRepeating ("CheckScreenEdges", 0.1f, 0.1f);         
    } 
 
    private void CheckScreenEdges() { 
        Vector3 pos = transform.position;   
        Vector3 vel = rigidBody.velocity;   
        float xTeleport = 0f, zTeleport = 0f; 
 
        if (pos.x < GameManager.screenBottomLeft.x && vel.x <= 0f) 
            xTeleport = GameManager.screenWidth; 
        else if (pos.x > GameManager.screenTopRight.x && vel.x >= 0f) 
            xTeleport = -GameManager.screenWidth; 
 
        if (pos.z < GameManager.screenBottomLeft.z && vel.z <= 0f) 
            zTeleport = GameManager.screenHeight; 
        else if (pos.z > GameManager.screenTopRight.z && vel.z >= 0f) 
            zTeleport = -GameManager.screenHeight; 
 
        if (xTeleport != 0f || zTeleport != 0f) { 
            if (destroyWhenOffscreen) 
                Destroy (this.gameObject); 
            else 
                transform.position = new Vector3 (pos.x + xTeleport, 0f, pos.z + zTeleport); 
        } 
 
    } 
}