Unity3d在手機里面實現用手勢放大縮小鏡頭

 剛進入一家公司，上了4天班了，終于發現自己是那么的菜，看了老大寫的一些代碼。沒辦法看下去了，簡直太強了，在這幾天上班里，因為是很大的公司，感覺自己壓力很大很大啊。心里很壓抑。因為自己很菜。好了，先不說這些了，加油吧。堅持努力學習。這幾天里老大叫我實現在手機里面實現鏡頭的放大縮小和移動場景，有點像海島奇兵那樣的控制鏡頭那樣的效果，在寫這些代碼中。遇到了很多很多的問題。因為緊張，也因為自己基礎不行。

代碼如下，需要把這個腳本綁定在攝像機上：

using UnityEngine;
using System.Collections;

public class CameraController : MonoBehaviour
{

    public float ZoomSpeed = 500;
    public float zoomSpeed
    {
        get
        {
            return ZoomSpeed;
        }
        set
        {
            ZoomSpeed = value;
        }
    }
    public float MaxY = 3921;
    public float maxY
    {
        get
        {
            return MaxY;
        }
        set
        {
            MaxY = value;
        }
    }

    public float MinY = 1200;
    public float minY
    {
        get
        {
            return MinY;
        }
        set
        {
            MinY = value;
        }
    }
    // Update is called once per frame
    private Vector2 lastTouchPos1 = Vector2.zero;
    private Vector2 lastTouchPos2 = Vector2.zero;


    void Update()
    {
      //這里是鼠標控制
        if (Input.GetAxis("Mouse ScrollWheel") != 0)
        {
            var forward = Camera.main.transform.forward * ZoomSpeed * Input.GetAxis("Mouse ScrollWheel");
            Camera.main.transform.position += forward;
        }

   //這里是在手機上手勢控制
        if (Input.touchCount > 1)
        {

            if (Input.GetTouch(0).phase == TouchPhase.Moved || Input.GetTouch(1).phase == TouchPhase.Moved)
            {
                Vector2 v1 = Input.GetTouch(0).position;
                Vector2 v2 = Input.GetTouch(1).position;



                float distance = GetDistance(v1, v2);
                Vector3 forward = Camera.main.transform.forward * distance * Time.deltaTime * 0.5f;
                Vector3 newPos = Camera.main.transform.position + forward;
                if (newPos.y > MaxY || newPos.y < MinY)
                {

                }
                else
                {
                    Camera.main.transform.position = newPos;
                }
                lastTouchPos1 = Input.GetTouch(0).position;
                lastTouchPos2 = Input.GetTouch(1).position;

            }
            else
            {
                lastTouchPos1 = Vector2.zero;
                lastTouchPos2 = Vector2.zero;
            }


        }

    }


    private float GetDistance(Vector2 pos1, Vector2 pos2)
    {
        if (lastTouchPos1 == Vector2.zero && lastTouchPos2 == Vector2.zero)
        {
            return 0.0f;
        }

        return (pos2 - pos1).sqrMagnitude - (lastTouchPos2 - lastTouchPos1).sqrMagnitude;
    }

}

這里只是實現鏡頭的放大縮小，下次補上移動場景的。先加班了，大家加油吧