（スクリプト）

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

public class ChaseSwitch : MonoBehaviour
{
    private Chase chase;
    private float dis;
    public GameObject target;

    private void Start()
    {
        chase = GetComponent<Chase>();
    }

    void Update()
    {
        dis = Vector3.Distance(this.transform.position, target.transform.position);

        print(dis);

        if(dis < 15f)
        {
            chase.enabled = true;
        }
    }
}