unity3d 读取usb摄像头

using UnityEngine;

using System.Collections;

public class C : MonoBehaviour

{

    private WebCamTexture cameraTexture;

    private string cameraName = "";

    private bool isPlay = true;

    // Use this for initialization

    void Start()

    {

        cameraTexture = new WebCamTexture();

        StartCoroutine(Test());

    }

    // Update is called once per frame

    void Update()

    {

    }

    IEnumerator Test()

    {

        yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);

        if (Application.HasUserAuthorization(UserAuthorization.WebCam))

        {

            WebCamDevice[] devices = WebCamTexture.devices;

            cameraName = devices[].name;

            cameraTexture = new WebCamTexture(cameraName, , , );

            cameraTexture.Play();

            isPlay = true;

        }

    }

    void OnGUI()

    {

        if (isPlay)

        {

            GUI.DrawTexture(new Rect(, , , ), cameraTexture, ScaleMode.ScaleToFit);

        }

    }

}