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

public class Buring : MonoBehaviour
{
    private int num = 1; // 「Rayの向き」と「走る向き」をコントロール
    public GameObject rayPoint;
    public GameObject point_front;
    public GameObject point_back;
    private SpriteRenderer spriteRenderer;

    void Start()
    {
        spriteRenderer = GetComponent<SpriteRenderer>();

        rayPoint.transform.position = point_back.transform.position;
    }

    void Update()
    {
        // 走る
        transform.Translate(Vector2.left * Time.deltaTime * 10 * num); // numで走る向きを切り替える

        // Rayで前方の壁を探知して方向転換する
        RaycastHit2D hit2d = Physics2D.Raycast(rayPoint.transform.position, Vector2.left * num, 0.2f);// numでRayの向きを切り替える
        Debug.DrawRay(rayPoint.transform.position, Vector3.left * num, Color.white, 0.2f);

        if (hit2d.collider != null)
        {
            if (hit2d.collider.CompareTag("Floor"))
            {
                num *= -1; // numを「-1」と「1」で切り替える（テクニック）
            }
        }

        // 画像の向きを進行方向と合致させる
        if (num == 1)
        {
            spriteRenderer.flipX = false;

            rayPoint.transform.position = point_back.transform.position;
        }
        else if (num == -1)
        {
            spriteRenderer.flipX = true;

            rayPoint.transform.position = point_front.transform.position;
        }
    }
}