对象实例化不按预期方式工作

Question

我正在开发一个无限滚动条，其中玩家和摄像机是静止的，而平台和背景向它们移动。一旦一个物体第一次进入相机，它就会在 BoxCollider2D 的右边缘创建一个自己的副本，一旦它存在，它就会被销毁。

地板、天花板、天空、云彩和前景中的每一个都附有以下脚本：

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

public class InfiniteScroller : MonoBehaviour
{

    // Variables to control the parallax effect
    // A value of 1 means the object will move at the same speed as the camera
    // A value of 0 means the object will not move at all
    public float parallaxCoefficient = 1;

    // Variable to store the player controller script where the speed is stored
    PlayerController playerController;

    // Collider and its properties
    BoxCollider2D col;
    float colPositionX;
    float colHalfWidth;

    // Camera and its properties
    Camera cam;
    float camPositionX;
    float camHalfWidth;

    // Variables to control the state of the object
    bool hasCreatedNewObject;
    bool visibleFirstTime;

    // Start is called before the first frame update
    void Start()
    {
        // Fetch the collider and its properties
        col = GetComponent<BoxCollider2D>();
        colPositionX = col.transform.position.x;
        colHalfWidth = col.size.x/2;

        // Fetch the camera and its properties
        cam = Camera.main;
        camPositionX = cam.transform.position.x;
        camHalfWidth = cam.aspect * cam.orthographicSize;

        // fetch the player controller, we do it in start() because fetching the player controller in update() in every frame is expensive
        playerController = GameObject.Find("Player").GetComponent<PlayerController>();

        // set the state of the object to its initial state
        hasCreatedNewObject = false;
        visibleFirstTime = CheckIsVisible();
    }

    // Update is called once per frame
    void Update()
    {
        // determine whether the object is visible
        bool visible = CheckIsVisible();

        // if the object is visible for the first time, create a new object
        if (visible)
        {
            if (!hasCreatedNewObject) {
                // create a new object
                GameObject newObject = Instantiate(gameObject, new Vector2(colPositionX + colHalfWidth, transform.position.y), Quaternion.identity);

                // set the state of the object to its initial state
                hasCreatedNewObject = true;
            }

            if (!visibleFirstTime) visibleFirstTime = true;
        }
        else
        {
            // if the object is not visible, destroy it
            if (visibleFirstTime) Destroy(gameObject);
        }
    }

    // FixedUpdate is called once per physics update
    void FixedUpdate()
    {

        // get the speed from the player controller
        float speed = playerController.speed;

        // // Move the object to the left
        transform.Translate(Vector2.left * speed * parallaxCoefficient * Time.deltaTime);
    }

    // check if the object is visible by the camera
    bool CheckIsVisible()
    {
        Plane[] planes = GeometryUtility.CalculateFrustumPlanes(cam);
        return GeometryUtility.TestPlanesAABB(planes, col.bounds);
    }
}

结果并不是我真正想要的，因为生成的对象相互进入。这是结果（您可以看到碰撞盒重叠）：

这是我的项目层次结构的样子：