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

public class TileMenager : MonoBehaviour {

    //Array for tile prefabs
    public GameObject[] tilePrefabs;

    //Take players transform
    private Transform playerTransform;
    //Point to spawn first elememt
    private float spawnZ = 32f;
    //Lenght of tiled object
    private float tileLength = 64f;
    //Ammount of spawned elements on screen
    private int ammTilesOnScreen = 7;

    // Use this for initialization
    void Start () {
        playerTransform = GameObject.FindGameObjectWithTag("Player").transform;

        for (int i = 0; i < ammTilesOnScreen; i++)
        {
            SpawnTile();
        }
    }

    // Update is called once per frame
    void Update () {
        if (playerTransform.position.z > (spawnZ-ammTilesOnScreen*tileLength))
        {
            SpawnTile();
        }
    }

    private void SpawnTile(int prefabIndex = -1)
    {
        GameObject go;
        go = Instantiate(tilePrefabs[0]) as GameObject;
        go.transform.SetParent(transform);
        //Vector3.forward = (0,0,1)
        go.transform.position = Vector3.forward * spawnZ;
        spawnZ += tileLength;
    }
}