using System;
using UnityEngine;

public class Ghost : MonoBehaviour
{
    private GameObject target;
    private float moveSpeed = 1.0f; // 移動速度
    private float floatingHeight = 0.5f; // 上下の揺れ幅
    private float floatingSpeed = 1.5f; // 揺れの速さ

    void Start()
    {
        target = GameObject.Find("Player");
    }

    void Update()
    {
        if(!target)
        {
            return;
        }

        // ターゲットへの向きの計算
        Vector3 direction = (target.transform.position - transform.position).normalized;

        // 移動
        transform.position += direction * moveSpeed * Time.deltaTime;

        // 浮遊感（サイン波）
        float hover = MathF.Sin(Time.time * floatingSpeed) * floatingHeight;
        transform.position += Vector3.up * hover * Time.deltaTime;
    }
}