_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 = 0.5f;       // <20><>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD>ٶȣ<D9B6><C8A3><EFBFBD>/<2F>룩
    public float smoothSpeed = 0.125f;  // ƽ<><C6BD><EFBFBD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD>ٶ<EFBFBD>
    public float minDistance = 2f;      // <20><>С<EFBFBD><D0A1><EFBFBD><EFBFBD>
    public float maxDistance = 15f;     // <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 = 10f;   // <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

    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 = -offset.z;

        // <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;

        if (isOrbiting)
        {
            StartOrbit();
        }
    }

    private void Update()
    {
        // <20><>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD>ľ<EFBFBD><C4BE><EFBFBD>
        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>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><><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;

        // <20><><EFBFBD><EFBFBD> 2<><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> GameObject
        // gameObject.SetActive(false);

        Debug.Log("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
    }
}