求助：复刻Ditto Zig Zag游戏的平台生成与相机适配问题

一、限制平台生成在相机可视范围内 #

要让平台不超出屏幕，需先计算相机在世界空间中的可视边界，再在生成平台时做位置校验。

1. 添加必要变量 #

在PathGenerator脚本中补充以下变量：

[SerializeField] Camera mainCamera;
private float minX, maxX, minZ, maxZ;
private float platformHalfSize;

2. 初始化边界与平台尺寸 #

修改Start()方法，计算相机边界和平台半尺寸（避免平台边缘超出屏幕）：

void Start()
{
    // 获取平台预制体的半宽度，适配不同尺寸平台
    Renderer platformRenderer = trackPrefab.GetComponent<Renderer>();
    if (platformRenderer != null)
    {
        platformHalfSize = platformRenderer.bounds.extents.x;
    }

    // 默认绑定主相机
    if (mainCamera == null) mainCamera = Camera.main;
    // 正交相机边界计算
    float cameraHalfWidth = mainCamera.orthographicSize * mainCamera.aspect;
    float cameraHalfHeight = mainCamera.orthographicSize;

    // 转换为世界空间边界，预留平台半尺寸的余量
    minX = mainCamera.transform.position.x - cameraHalfWidth + platformHalfSize;
    maxX = mainCamera.transform.position.x + cameraHalfWidth - platformHalfSize;
    minZ = mainCamera.transform.position.z - cameraHalfHeight + platformHalfSize;
    maxZ = mainCamera.transform.position.z + cameraHalfHeight - platformHalfSize;

    CreatePath(amountToPool);
    UsePath();
}

透视相机适配：替换上述边界计算代码为：

// 透视相机通过视口转世界坐标计算边界
Vector3 bottomLeft = mainCamera.ViewportToWorldPoint(new Vector3(0, 0, mainCamera.nearClipPlane));
Vector3 topRight = mainCamera.ViewportToWorldPoint(new Vector3(1, 1, mainCamera.nearClipPlane));

minX = bottomLeft.x + platformHalfSize;
maxX = topRight.x - platformHalfSize;
minZ = bottomLeft.z + platformHalfSize;
maxZ = topRight.z - platformHalfSize;

3. 修改随机生成逻辑，添加边界校验 #

重写RandomPicker()方法，确保生成位置不越界：

private void RandomPicker()
{
    var randomNumber = Random.Range(0, 2);
    Vector3 newPos = lastPos;

    if (randomNumber < 1)
    {
        newPos = new Vector3(lastPos.x - offset, 0, lastPos.z);
        // X轴越界则反向生成
        if (newPos.x - platformHalfSize < minX || newPos.x + platformHalfSize > maxX)
        {
            newPos = new Vector3(lastPos.x + offset, 0, lastPos.z);
        }
    }
    else
    {
        newPos = new Vector3(lastPos.x, 0, lastPos.z - offset);
        // Z轴越界则反向生成
        if (newPos.z - platformHalfSize < minZ || newPos.z + platformHalfSize > maxZ)
        {
            newPos = new Vector3(lastPos.x, 0, lastPos.z + offset);
        }
    }

    spawnPos = newPos;
    lastPos = spawnPos;
}

二、相机精准移动，保持平台可视 #

相机需跟随游戏推进（如玩家或最新平台），同时实时更新边界，确保后续生成的平台始终在屏幕内。

1. 添加跟随相关变量 #

[SerializeField] Transform followTarget; // 绑定玩家或路径核心对象
[SerializeField] float followSpeed = 5f;

2. 实现平滑跟随与边界更新 #

在Update()方法中添加相机跟随逻辑，并实时刷新边界：

void Update()
{
    if (followTarget != null)
    {
        // 保持相机在目标正上方（固定Y轴高度）
        Vector3 targetCamPos = new Vector3(followTarget.position.x, mainCamera.transform.position.y, followTarget.position.z);
        // 平滑插值移动相机
        mainCamera.transform.position = Vector3.Lerp(mainCamera.transform.position, targetCamPos, followSpeed * Time.deltaTime);
        // 实时更新相机边界
        UpdateCameraBounds();
    }
}

// 提取边界更新方法，方便复用
private void UpdateCameraBounds()
{
    if (mainCamera.orthographic)
    {
        float cameraHalfWidth = mainCamera.orthographicSize * mainCamera.aspect;
        float cameraHalfHeight = mainCamera.orthographicSize;

        minX = mainCamera.transform.position.x - cameraHalfWidth + platformHalfSize;
        maxX = mainCamera.transform.position.x + cameraHalfWidth - platformHalfSize;
        minZ = mainCamera.transform.position.z - cameraHalfHeight + platformHalfSize;
        maxZ = mainCamera.transform.position.z + cameraHalfHeight - platformHalfSize;
    }
    else
    {
        Vector3 bottomLeft = mainCamera.ViewportToWorldPoint(new Vector3(0, 0, mainCamera.nearClipPlane));
        Vector3 topRight = mainCamera.ViewportToWorldPoint(new Vector3(1, 1, mainCamera.nearClipPlane));

        minX = bottomLeft.x + platformHalfSize;
        maxX = topRight.x - platformHalfSize;
        minZ = bottomLeft.z + platformHalfSize;
        maxZ = topRight.z - platformHalfSize;
    }
}

额外注意事项 #

• 初始lastPos需设置在相机边界内，避免第一个平台直接越界
• 若使用对象池复用平台，需确保每次复用前重新校验位置

内容的提问来源于stack exchange，提问作者Deepanshu Soni