using UnityEngine;

/// <summary>
/// 鼠标控制相机Fov进行镜头方法缩小
/// </summary>
public class CameraZoomAndModelMove : MonoBehaviour
{
    public Camera mainCamera;//主相机
    public Transform model;//验电笔模型

    //需要自定义模型位置，首先Camera的Fov是60的时候，填写模型的坐标
    public Vector3 startPosition = new Vector3(0.819f, -0.06f, 1.04f); // FOV 60时的位置
    //Camera的Fov是20的时候，填写模型的坐标
    public Vector3 endPosition = new Vector3(0.559f, 0.052f, 2.5f);       // FOV 20时的位置

    private float maxFOV = 60f;
    private float minFOV = 20f;

    void Update()
    {
        HandleCameraZoom();
        MoveModelBasedOnFOV();
    }

    private void HandleCameraZoom()
    {
        float scrollInput = Input.GetAxis("Mouse ScrollWheel");
        mainCamera.fieldOfView -= scrollInput * 10f;
        mainCamera.fieldOfView = Mathf.Clamp(mainCamera.fieldOfView, minFOV, maxFOV);
    }

    private void MoveModelBasedOnFOV()
    {
        float t = Mathf.InverseLerp(maxFOV, minFOV, mainCamera.fieldOfView);
        float nonLinearT = t * t; 
        model.localPosition = Vector3.Lerp(startPosition, endPosition, nonLinearT);
    }
}