Unity 鼠标滚轮缩放 拖动移动视角

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class cameraMove : MonoBehaviour
{
    public enum RotationAxes
    {
        MouseXAndY = 0,
        MouseX = 1,
        MouseY = 2
    }

    public RotationAxes m_axes = RotationAxes.MouseXAndY;
    public float m_sensitivityX = 10f;
    public float m_sensitivityY = 10f;

    public bool CanMove  = false;

    // 水平方向的 镜头转向
    public float m_minimumX = -360f;
    public float m_maximumX = 360f;
    // 垂直方向的 镜头转向 (这里给个限度 最大仰角为45°)
    public float m_minimumY = -45f;
    public float m_maximumY = 45f;

    float MouseWheelSensitivity = 5;
    float MouseZoomMin = 2;
    float MouseZoomMax = 10;

    float m_rotationY = 0f;


    // Use this for initialization
    void Start()
    {
        // 防止 刚体影响 镜头旋转
        if (GetComponent<Rigidbody>())
        {
            GetComponent<Rigidbody>().freezeRotation = true;
        }
    }

    // Update is called once per frame
    void Update()
    {


        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            if (Camera.main.fieldOfView <= 200)
                Camera.main.fieldOfView += 2;
        }
        //Zoom in
        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            if (Camera.main.fieldOfView > 10)
                Camera.main.fieldOfView -= 2;
        }


        if (Input.GetMouseButtonDown(1))
        {
            CanMove = !CanMove;
        }



        if (CanMove)
        {
            if (m_axes == RotationAxes.MouseXAndY)
            {
                float m_rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * m_sensitivityX;
                m_rotationY += Input.GetAxis("Mouse Y") * m_sensitivityY;
                m_rotationY = Mathf.Clamp(m_rotationY, m_minimumY, m_maximumY);

                transform.localEulerAngles = new Vector3(-m_rotationY, m_rotationX, 0);
            }
            else if (m_axes == RotationAxes.MouseX)
            {
                transform.Rotate(0, Input.GetAxis("Mouse X") * m_sensitivityX, 0);
            }
            else
            {
                m_rotationY += Input.GetAxis("Mouse Y") * m_sensitivityY;
                m_rotationY = Mathf.Clamp(m_rotationY, m_minimumY, m_maximumY);

                transform.localEulerAngles = new Vector3(-m_rotationY, transform.localEulerAngles.y, 0);
            }
        }
    }
 

 
}

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