unity WebCam 手机自适应 摄像头

using UntyEngine;using System.Collections;using UnityEngine.UI;public class MobileCam : MonoBehaviour{    private bool camAvailable;    private WebCamTexture cameraTexture;    private Texture defaultBackground;    public RawImage background;    public AspectRatioFitter fit;    public bool frontFacing;    // Use this for initialization    void Start()    {        defaultBackground = background.texture;        WebCamDevice[] devices = WebCamTexture.devices;        if (devices.Length == 0)            return;        for (int i = 0; i < devices.Length; i++)        {            var curr = devices[i];            if (curr.isFrontFacing == frontFacing)            {                cameraTexture = new WebCamTexture(curr.name, Screen.width, Screen.height);                break;            }        }        if (cameraTexture == null)            return;        cameraTexture.Play(); // Start the camera        background.texture = cameraTexture; // Set the texture        camAvailable = true; // Set the camAvailable for future purposes.    }    // Update is called once per frame    void Update()    {        if (!camAvailable)            return;        float ratio = (float)cameraTexture.width / (float)cameraTexture.height;        fit.aspectRatio = ratio; // Set the aspect ratio        float scaleY = cameraTexture.videoVerticallyMirrored ? -1f : 1f; // Find if the camera is mirrored or not        background.rectTransform.localScale = new Vector3(1f, scaleY, 1f); // Swap the mirrored camera        int orient = -cameraTexture.videoRotationAngle;        background.rectTransform.localEulerAngles = new Vector3(0, 0, orient);    }}