Question

我一直在尝试使用Unity 2d实现无限视差。我已经启用了视差功能，但是在尝试使背景无限连续时，我开始遇到问题。

我应该提到，相机背景仅在X轴上受到限制。播放器可以上下移动，但背景和相机Y位置保持不变。

主要问题是，在我的11个用于视差效果的背景中，只有第一个被克隆，并且在屏幕外时都没有一个被销毁（尽管这是第二点）。 / p>

我尝试了几种不同的方法来检测播放器是否在后台。我使用了附加到每个背景对象的GameObjects，并将它们与Player的位置进行了比较。效果不佳，因此在我当前的版本中，我正在使用摄像头来检测播放器的位置。

我创建无限背景的过程如下：

Loop: Through all the background images and do the following checks:

  If: Player position is outside the bounds of the current background on the left.

    Then: Create a copy of the current background and place it to the left the current background.

If: Player position is outside the bounds of the current background on the right.

    Then: Create a copy of the current background and place it to the right the current background.

要清理背景，我只检查播放器是否位于背景之一之前，如果没有，则将其删除。

以下是工作视差代码以及底部尝试的无限背景代码：

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

public class ParallaxBackground : MonoBehaviour {

    public GameObject[] backgrounds;
    public float smooting = 1f;
    public int offset = -1;
    public Transform cam;
    public Camera Lcam;
    public Camera Rcam;

    //private Transform cam;
    private Vector3 previousCamPos;
    private float[] parallaxScales;
    private GameObject[] backgroundClones;

    // Use this for initialization
    void Start () {
        previousCamPos = cam.position;

        parallaxScales = new float[backgrounds.Length];
        for (int i = 0; i < backgrounds.Length; i++) {
            parallaxScales[i] = backgrounds[i].transform.position.z * offset;
        }

    }

    // Update is called once per frame
    void FixedUpdate () {

        // Handle paralaxing
        for (int i = 0; i < backgrounds.Length; i++) {
            float parallax = (previousCamPos.x - cam.position.x) * parallaxScales[i];

            float backgroundTargetPosX = backgrounds[i].transform.position.x + parallax;

            Vector3 backgroundTargetPos = new Vector3(backgroundTargetPosX, backgrounds[i].transform.position.y, backgrounds[i].transform.position.z);

            backgrounds[i].transform.position = Vector3.Lerp(backgrounds[i].transform.position, backgroundTargetPos, smooting * Time.deltaTime);
        }

        /* Handle continuous backgrounds*/
        for (int i = 0; i < backgrounds.Length; i++)
        {

            // Left Camera
            float pointL = Lcam.WorldToViewportPoint(backgrounds[i].transform.position).x;

            // Right Camera
            float pointR = Rcam.WorldToViewportPoint(backgrounds[i].transform.position).x;


            // Check if the object is within the Left camera
            if (pointL < 1)
            {
                Destroy(backgroundClones[i]);
                var clone = Instantiate(backgrounds[i].gameObject);
                clone.transform.position = Rcam.transform.position;
                backgroundClones[i] = clone;
            }
            else if (pointR > 0)
            {
                Destroy(backgroundClones[i]);
                var clone = Instantiate(backgrounds[i].gameObject);
                clone.transform.position = Lcam.transform.position;
                backgroundClones[i] = clone;
            }
        }

        /* Handle removing backgrounds*/
        for (int i = 0; i < backgrounds.Length; i++)
        {
            // Main Camera
            Vector3 point = Camera.main.WorldToScreenPoint(backgrounds[i].transform.position);

            // Left Camera
            float pointL = Lcam.WorldToViewportPoint(backgrounds[i].transform.position).x;

            // Right Camera
            float pointR = Rcam.WorldToViewportPoint(backgrounds[i].transform.position).x;


            // Check if the object is within the main camera
            if (point.x > 0 || point.x < 1)
            {

            }
            else {
                Destroy(backgrounds[i]);
            }
        }


        previousCamPos = cam.position;
    }
}

Unity中的无限视差背景

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