如何检测播放器是否靠近GameObject(C#)Unity5

using UnityEngine;

public class PlayerDetector : MonoBehaviour
{
    public GameObject player; // 播放器
    public GameObject gameObject; // 目标GameObject
    public float threshold = 1.0f; // 阈值

    private void Update()
    {
        // 获取播放器和GameObject的位置信息
        Vector3 playerPosition = player.transform.position;
        Vector3 gameObjectPosition = gameObject.transform.position;

        // 计算距离
        float distance = Vector3.Distance(playerPosition, gameObjectPosition);

        // 检测距离
        if (distance <= threshold)
        {
            Debug.Log("Player is close to GameObject");
        }
        else
        {
            Debug.Log("Player is far from GameObject");
        }
    }
}