_xiaofang/xiaofang/Assets/Res/gsj/scripts/Godvisual.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Threading.Tasks;
public class Godvisual : MonoBehaviour
{
    public Transform mainBuilding; // 主建筑的中心点
    public Transform birdEyeView;  // 鸟瞰视角的 Transform
    public Transform[] characterViews; // 每个角色的默认视角 Transform 数组
    public bool ishost; // 是否为主持人
    public float voiceLength = 10f; // 语音长度，单位秒
    public float rotationRadius = 100f; // 环绕半径
    public float rotationHeight = 5f; // 环绕高度
    public float rotationSpeed = 36f; // 环绕速度（角速度，度/秒）
    private float elapsedTime = 0f; // 已经经过的时间
    private bool isSwitching = false; // 是否正在切换视角
    private bool isRotating = false; // 是否正在旋转
    private bool isAtGodView = true; // 是否处于上帝视角

    void OnEnable()
    {
        // 订阅事件
        Starthost.OnBoolValueChanged += HandleRotationControl;
    }

    void OnDisable()
    {
        // 取消订阅事件
        Starthost.OnBoolValueChanged -= HandleRotationControl;
    }

    // Start is called before the first frame update
    void Start()
    {
        // 最开始切换到上帝视角
        SetToGodView();

        elapsedTime = 0f;
        isSwitching = false;
   
        // 确保摄像机初始位置在环绕轨道上
        //Vector3 startPosition = mainBuilding.position + new Vector3(rotationRadius, rotationHeight, 0);
        //transform.position = startPosition;
        //transform.LookAt(mainBuilding); // 摄像机始终朝向主建筑
    }
    // 切换到上帝视角
    void SetToGodView()
    {
        transform.position = birdEyeView.position;
        transform.rotation = birdEyeView.rotation;
        isAtGodView = true;
        isRotating = false; // 停止旋转逻辑
        //transform.GetComponent<Camera>().orthographic = true;//正交
    }
    // Update is called once per frame
    void Update()
    {
        if (!isRotating) return;
        // 时间计数
        elapsedTime += Time.deltaTime;

        // 如果还未到最后两秒，环绕主建筑
        if (elapsedTime < voiceLength - 2f && !isSwitching)
        {
            RotateAroundBuilding();
            isAtGodView = false;
        }
        // 在最后两秒切换到目标视角
        else if (!isSwitching)
        {
            isSwitching = true;
            SwitchToFinalViewAsync();
            
        }
        
        if (isAtGodView)
        {
            //transform.GetComponent<Camera>().orthographic = true;
        }
        else
        {
            //transform.GetComponent<Camera>().orthographic = false;
        }
    }
    // 环绕主建筑
    void RotateAroundBuilding()
    {
        float angle = rotationSpeed * Time.deltaTime; // 每帧旋转的角度
        Vector3 offset = transform.position - mainBuilding.position; // 当前摄像机到建筑中心的偏移
        offset = Quaternion.Euler(0, angle, 0) * offset; // 绕建筑中心点旋转
        transform.position = mainBuilding.position + offset; // 更新摄像机位置
        transform.position = new Vector3(transform.position.x, mainBuilding.position.y + rotationHeight, transform.position.z); // 确保高度固定
        transform.LookAt(mainBuilding); // 始终朝向主建筑
    }

    // 切换到最终视角（使用 async/await）
    async void SwitchToFinalViewAsync()
    {
        // 切换到鸟瞰图或角色视角
        Transform targetView = ishost ? birdEyeView : GetCurrentCharacterView();

        // 平滑切换摄像机位置和旋转
        float switchDuration = 2f; // 切换持续时间
        Vector3 startPosition = transform.position;
        Quaternion startRotation = transform.rotation;
        Vector3 endPosition = targetView.position;
        Quaternion endRotation = targetView.rotation;

        // 平滑过渡
        for (float t = 0; t < switchDuration; t += Time.deltaTime)
        {
            float progress = t / switchDuration;
            transform.position = Vector3.Lerp(startPosition, endPosition, progress);
            transform.rotation = Quaternion.Lerp(startRotation, endRotation, progress);
            await Task.Yield(); // 等待一帧
        }
        isAtGodView = true;
        // 确保最终位置和旋转准确
        transform.position = endPosition;
        transform.rotation = endRotation;
    }

    // 获取当前角色的默认视角（假设角色索引为 0）
    Transform GetCurrentCharacterView()
    {
        int characterIndex = 0; // 根据逻辑动态获取角色索引
        if (characterIndex >= 0 && characterIndex < characterViews.Length)
        {
            return characterViews[characterIndex];
        }
        else
        {
            Debug.LogWarning("角色视角未配置，使用默认鸟瞰视角");
            return birdEyeView;
        }
    }
    // 处理旋转控制事件
    void HandleRotationControl(bool shouldRotate)
    {
        isRotating = shouldRotate;
        if (!shouldRotate)
        {
            // 重置时间和切换状态
            elapsedTime = 0f;
            isSwitching = false;
        }
    }
}