unity中关于相机移动的脚本

unity中关于相机移动（包括平移和远近缩放）的三个脚本，如果使用的话将它们全部挂载在一个空object上就好，数值等可以参考下图：

代码：

CameraMoveDirectionKey.cs

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


/// <summary>
/// 镜头移动方式1：通过wasd(或者上下左右方向键)来上下左右平移镜头
/// </summary>
public class CameraMoveDirectionKey : MonoBehaviour
{
    //镜头平移的速率
    public float moveSpeed = 100.0f;

    //镜头
    public Transform camera;





    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        float horizontalInput = Input.GetAxis("Horizontal");
        float verticalInput = Input.GetAxis("Vertical");


        Vector3 forwardMove = moveSpeed * camera.up * verticalInput * Time.deltaTime;
        forwardMove.y = 0;
        Vector3 rightMove = moveSpeed * camera.right * horizontalInput * Time.deltaTime;

        Vector3 move = forwardMove + rightMove;
        camera.position += move;

    }
}

CameraScroll.cs

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



/// <summary>
/// 滑动鼠标滚轮使得镜头竖直上下移动
/// </summary>
public class CameraScroll : MonoBehaviour
{
    public float zoomSpeed = 600.0f;

    public Transform camera;


    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        float scrollInput = -Input.GetAxis("Mouse ScrollWheel");
        Vector3 upMove = new Vector3(0, scrollInput * zoomSpeed * Time.deltaTime, 0);
        camera.position += upMove;
    }
}

CameraMoveMouse.cs

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

/// <summary>
/// 鼠标移动到屏幕边缘然后使得镜头移动
/// </summary>
public class CameraMoveMouse : MonoBehaviour
{
    public float mouseOffset=0.01f;
    public Transform myCamera;
    public float moveSpeed=1f;

    private float maxY = 1f;
    private float maxX = 1f;

    private void mouseInScreenBound()
    {
        Vector3 v1 = Camera.main.ScreenToViewportPoint(Input.mousePosition);
        //上移
        if (v1.y >= maxY - mouseOffset)
        {
            myCamera.Translate(Vector2.up * moveSpeed);
        }
        //下移
        if (v1.y <= mouseOffset)
        {
            myCamera.Translate(Vector2.down * moveSpeed);
        }
        //左移
        if (v1.x <= mouseOffset)
        {
            myCamera.Translate(Vector2.left * moveSpeed);
        }
        //右移
        if (v1.x >= maxX - mouseOffset)
        {
            myCamera.Translate(Vector2.right * moveSpeed);
        }
    }

    private void Start()
    {
        
    }

    private void Update()
    {
        mouseInScreenBound();
    }

}