相机振动效果（打击屏幕振动）

实现相机振动的代码如下：

using UnityEngine;
using System.Collections;

public class CameraShake : MonoBehaviour {

    Matrix4x4 originalProjection;
    float timer;

    void Start()
    {
        originalProjection = camera.projectionMatrix;
    }

    public IEnumerator Shake(float gap)
    {
        timer = Time.time;
        while (Time.time - timer <= gap)
        {
            Matrix4x4 p = originalProjection;
            p.m01 += Mathf.Sin(Time.time * 120F) * 0.04F;
            p.m10 += Mathf.Sin(Time.time * 150F) * 0.04F;
            camera.projectionMatrix = p;
            yield return 0;
        }
        camera.ResetProjectionMatrix();
    }
}

把该脚本绑定在相机后，通过一个事件调用CameraShake的Shake函数，如：

    void OnTriggerEnter(Collider other)
  {
     if (other.name == "Cube")
     {          
　　　　StartCoroutine(Camera.main.GetComponent<CameraShake>().Shake(speed));
     }
  }