_xiaofang/xiaofang/Assets/Script/hylScripts/CameraSmoothMove.cs

 using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Threading.Tasks;

public class CameraSmoothMove : MonoBehaviour
{
    public Transform target;            // <20><><EFBFBD><EFBFBD>Χ<EFBFBD>Ƶ<EFBFBD>Ŀ<EFBFBD>꣨<EFBFBD><EAA3A8><EFBFBD><EFBFBD><EFBFBD>
    public Vector3 offset = new Vector3(0f, 2f, -5f);   // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼƫ<CABC><C6AB><EFBFBD><EFBFBD>
    private float orbitSpeed = 1f;       // <20><>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD>ٶȣ<D9B6><C8A3><EFBFBD>/<2F>룩
    public float smoothSpeed = 1f;  // ƽ<><C6BD><EFBFBD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD>ٶ<EFBFBD>
    public float minDistance = 70f;      // <20><>С<EFBFBD><D0A1><EFBFBD><EFBFBD>
    public float maxDistance = 80f;     // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    public float scrollSpeed = 2f;      // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֿ<EFBFBD><D6BF>ƾ<EFBFBD><C6BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>

    private bool isOrbiting = true;     // <20>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת
    private float orbitDuration = 7f; // <20>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD>תһȦ<D2BB><C8A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
    private Vector3 fixedPosition;      // <20><><EFBFBD><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD>Ĺ̶<C4B9>λ<EFBFBD><CEBB>
    private Quaternion fixedRotation;   // <20><><EFBFBD><EFBFBD>ͣ<EFBFBD><CDA3>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>ת
    private float currentDistance;      // <20><>ǰ<EFBFBD><C7B0>Ŀ<EFBFBD><C4BF><EFBFBD>ľ<EFBFBD><C4BE><EFBFBD>
    private Transform mainCameraTransform; // Main Camera <20><>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת

    // <20><><EFBFBD><EFBFBD><EFBFBD>ӽǵ<D3BD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
    public Vector3 overlookPosition = new Vector3(0f, 70f, 90f); // <20><><EFBFBD><EFBFBD><EFBFBD>ӽǵij<C7B5>ʼλ<CABC><CEBB>
    public Quaternion overlookRotation = Quaternion.Euler(90f, 0f, 0f); // <20><><EFBFBD><EFBFBD><EFBFBD>ӽǵ<D3BD><C7B5><EFBFBD>ת

    public GameObject Canvas;

    private void Start()
    {
        if (target == null)
        {
            Debug.LogError("Ŀ<>꽨<EFBFBD><EABDA8><EFBFBD><EFBFBD>δ<EFBFBD><CEB4><EFBFBD>ã<EFBFBD>");
            return;
        }

        // <20><>ȡ Main Camera <20><> Transform
        mainCameraTransform = Camera.main.transform;

        // <20><><EFBFBD>ó<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
        currentDistance = 20f; // <20><>ʼ<EFBFBD><CABC><EFBFBD><EEABBE><EFBFBD>

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6>ͣ<EFBFBD><CDA3><EFBFBD><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
        fixedPosition = mainCameraTransform.position;
        fixedRotation = mainCameraTransform.rotation;

        Canvas.gameObject.SetActive(false);

        // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        StartCameraSequence();
    }

    private void Update()
    {
        // <20><>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD>Ƹ<EFBFBD><C6B8><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD>ľ<EFBFBD><C4BE><EFBFBD>
        if (!isOrbiting)
        {
            float scrollInput = Input.GetAxis("Mouse ScrollWheel");
            currentDistance -= scrollInput * scrollSpeed; // <20><><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD><EFBFBD>پ<EFBFBD><D9BE><EFBFBD>
            currentDistance = Mathf.Clamp(currentDistance, minDistance, maxDistance);

            // <20><><EFBFBD>¸<EFBFBD><C2B8><EFBFBD><EFBFBD>ӽǵ<D3BD>λ<EFBFBD><CEBB>
            overlookPosition = target.position + new Vector3(0f, currentDistance, 0f);
        }
    }

    // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    public async void StartCameraSequence()
    {
        // 1. <20>ӵ<EFBFBD>ǰ<EFBFBD>ӽ<EFBFBD><D3BD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD>
        await MoveToOverlookPointAsync();

        // 2. <20>Ӹ<EFBFBD><D3B8><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƿ<EFBFBD>ʼ<EFBFBD><CABC>
        await MoveToOrbitStartPointAsync();

        // 3. <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF>
        StartOrbit();
    }

    // <20><><EFBFBD><EFBFBD>Χ<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת
    public async void StartOrbit()
    {
        isOrbiting = true;
        await OrbitAsync();
        StopOrbit();
    }

    // ֹͣΧ<D6B9>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD> Main Camera <20><>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
    public async void StopOrbit()
    {
        isOrbiting = false;

        // <20><>ȡ Main Camera <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
        fixedPosition = mainCameraTransform.position;
        fixedRotation = mainCameraTransform.rotation;

        await MoveToFixedPositionAsync();
    }

    // <20>첽<EFBFBD><ECB2BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8> async ʵ<><CAB5><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD>תһȦ
    private async Task OrbitAsync()
    {
        float elapsedTime = 0f;

        while (elapsedTime < orbitDuration)
        {
            if (!isOrbiting) break; // <20><>ǰ<EFBFBD>˳<EFBFBD>

            elapsedTime += Time.deltaTime;

            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD>Ƕ<EFBFBD>
            float angle = Mathf.Lerp(0, 360f, elapsedTime / orbitDuration);
            Vector3 offsetPosition = new Vector3(
                Mathf.Cos(Mathf.Deg2Rad * angle) * currentDistance,
                offset.y,
                Mathf.Sin(Mathf.Deg2Rad * angle) * currentDistance
            );

            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
            transform.position = target.position + offsetPosition;
            transform.LookAt(target); // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF>

            await Task.Yield(); // <20>ȴ<EFBFBD><C8B4><EFBFBD>һ֡
        }
    }

    // <20>첽<EFBFBD><ECB2BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD> Main Camera <20><>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
    private async Task MoveToFixedPositionAsync()
    {
        float elapsedTime = 0f;
        Vector3 startPosition = transform.position;
        Quaternion startRotation = transform.rotation;

        while (elapsedTime < 1f)
        {
            elapsedTime += Time.deltaTime * smoothSpeed;

            // ƽ<><C6BD><EFBFBD>ز<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת
            transform.position = Vector3.Lerp(startPosition, fixedPosition, elapsedTime);
            transform.rotation = Quaternion.Lerp(startRotation, fixedRotation, elapsedTime);

            await Task.Yield(); // <20>ȴ<EFBFBD><C8B4><EFBFBD>һ֡
        }

        // ȷ<><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD>ת<EFBFBD><D7AA> Main Camera <20><><EFBFBD><EFBFBD>
        transform.position = fixedPosition;
        transform.rotation = fixedRotation;

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        HideCamera();
    }

    // <20>첽<EFBFBD><ECB2BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӹ<EFBFBD><D3B8><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƿ<EFBFBD>ʼ<EFBFBD><CABC>
    private async Task MoveToOrbitStartPointAsync()
    {
        float elapsedTime = 0f;
        Vector3 startPosition = transform.position;
        Quaternion startRotation = transform.rotation;
        Vector3 orbitStartPosition = target.position + offset;

        while (elapsedTime < 1f)
        {
            elapsedTime += Time.deltaTime * smoothSpeed;

            // ƽ<><C6BD><EFBFBD>ز<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
            transform.position = Vector3.Lerp(startPosition, orbitStartPosition, elapsedTime);
            transform.rotation = Quaternion.Lerp(startRotation, Quaternion.LookRotation(target.position - orbitStartPosition), elapsedTime);

            await Task.Yield(); // <20>ȴ<EFBFBD><C8B4><EFBFBD>һ֡
        }
    }

    // <20>첽<EFBFBD><ECB2BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD>ǰ<EFBFBD>ӽ<EFBFBD><D3BD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD>
    private async Task MoveToOverlookPointAsync()
    {
        float elapsedTime = 0f;
        Vector3 startPosition = transform.position;
        Quaternion startRotation = transform.rotation;

        while (elapsedTime < 1f) // <20><><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD><EFBFBD>ɵij<C9B5><C4B3><EFBFBD>ʱ<EFBFBD><CAB1>
        {
            elapsedTime += Time.deltaTime * smoothSpeed;

            // <20>ӵ<EFBFBD>ǰλ<C7B0><CEBB>ƽ<EFBFBD><C6BD><EFBFBD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
            transform.position = Vector3.Lerp(startPosition, overlookPosition, elapsedTime);
            transform.rotation = Quaternion.Lerp(startRotation, overlookRotation, elapsedTime);

            await Task.Yield(); // <20>ȴ<EFBFBD><C8B4><EFBFBD>һ֡
        }

        // ȷ<><C8B7><EFBFBD><EFBFBD><EFBFBD>︩<EFBFBD><EFB8A9><EFBFBD>ӽ<EFBFBD>λ<EFBFBD><CEBB>
        transform.position = overlookPosition;
        transform.rotation = overlookRotation;
    }

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><C4B7><EFBFBD>
    private void HideCamera()
    {

        // <20><><EFBFBD><EFBFBD> 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Camera <20><><EFBFBD><EFBFBD>
        GetComponent<Camera>().enabled = false;
        Canvas.gameObject.SetActive(true);
        Debug.Log("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
    }
}