Unity 双指缩放程序

    using UnityEngine;
    using System.Collections;
    
    
    /// <summary>
    /// Found in 
    /// http://unity3d.com/pt/learn/tutorials/modules/beginner/platform-specific/pinch-zoom
    /// Contains both perspective and orthographic stuff, in this 2D game we'll
    /// be using only the orthographic one
    /// </summary>
    public class CameraPinchToZoom : MonoBehaviour
    {
    public float perspectiveZoomSpeed = 0.5f;        // The rate of change of the field of view in perspective mode.
    public float orthoZoomSpeed = 0.5f;        // The rate of change of the orthographic