鼠标控制相机 上下左右缩放 代码

工作中用在 Tilemap 里面的代码

using UnityEngine;
using UnityEngine.Tilemaps;


/*************************************************************
 * 场景相关
 *************************************************************/
public class TileCamera 
{
    public static bool isMove = false;

    /// <summary>
    /// 获取屏幕中心的瓦块坐标
    /// </summary>
    /// <returns></returns>
    public static Vector3Int GetScreenCentreCellPos(Camera TilemapCamera, Tilemap GoodsLayer)
    {
        Vector3 center = TilemapCamera.ScreenToWorldPoint(new Vector3(Screen.width / 2, Screen.height / 2, 0));
        Vector3Int CentreCellPos = GoodsLayer.WorldToCell(center);
        return CentreCellPos;
    }

    /// <summary>
    /// 场景移动
    /// </summary>
    public static void MoveView(Camera TilemapCamera)
    {
        //开启左右移动
        if (Input.GetMouseButtonDown(1))
            isMove = true;
        if (Input.GetMouseButtonUp(1))
            isMove = false;

        if (isMove)
        {
            Vector3 pos = TilemapCamera.ScreenToWorldPoint(Input.mousePosition);
            Debug.Log(pos);
            //限制超出屏幕
            if (pos.x < -20)
                pos.x = -20;
            else if (pos.x > 20)
                pos.x = 20;
            //上下移动
            if (pos.y > 19)
                pos.y = 19;
            else if (pos.y < 1)
                pos.y = 1;

            TilemapCamera.transform.position = new Vector3(Mathf.Lerp(TilemapCamera.transform.position.x, pos.x, 1.5f * Time.deltaTime), Mathf.Lerp(TilemapCamera.transform.position.y, pos.y, 1.5f * Time.deltaTime), pos.z);
        }
    }

    /// <summary>
    /// 处理视野的拉近和拉远效果
    /// </summary>
    public static void ScrollView(Camera TilemapCamera)
    {
        //print(Input.GetAxis("Mouse ScrollWheel"));  //鼠标向后滑动返回负数（拉近视野），向前正数（拉远视野）

        if(TilemapCamera!=null)
        {
            TilemapCamera.orthographicSize += Input.GetAxis("Mouse ScrollWheel");
            if (TilemapCamera.orthographicSize < 2)
            {
                TilemapCamera.orthographicSize = 2;
            }
            else if (TilemapCamera.orthographicSize > 20)
            {
                TilemapCamera.orthographicSize = 20;
            }
        }
       
    }


    /// <summary>
    /// 获取点击的Tilemap坐标
    /// </summary>
    /// <param name="camera"></param>
    /// <param name="tilemap"></param>
    /// <returns></returns>
    public Vector3Int GetGridPos(Camera TilemapCamera,Tilemap tilemap)
    {
        // 屏幕坐标 转 世界坐标
        Vector3 wordPos = TilemapCamera.ScreenToWorldPoint(Input.mousePosition);
        //Debug.LogError(wordPos);
        // 世界坐标 转 格子坐标
        Vector3Int callPos = tilemap.WorldToCell(wordPos);
        return callPos;
    }
}