Unity 3d UI獲取外部攝像頭拍攝

Unity 3d UI獲取外部攝像頭拍攝

3D環境下呼叫外部攝像頭的方法網路上有很多，在此不過多說，本方法是在2D環境下利用UI來呼叫外部攝像頭進行拍攝，總體而言，兩種環境下所用到的核心方法是一樣的。

1、建立一個RawImagin，並命名為CameraPlay

2、建立一個指令碼，命名為PlaneManager,將指令碼隨便掛在一個物體上。指令碼中的public RawImage rawImage;要記得在Inspector皮膚中把CameraPlay添上去

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PlaneManager : MonoBehaviour
{
    public string DeviceName;
    //public Vector2 CameraSize;
    public float CameraFPS;

    //接收返回的圖片資料  
    WebCamTexture _webCamera;
    //public GameObject Plane;//作為顯示攝像頭的皮膚
    public RawImage rawImage;


    void OnGUI()
    {
        if (GUI.Button(new Rect(100, 100, 100, 100), "Initialize Camera"))
        {
            StartCoroutine("InitCameraCor");
        }

        //新增一個按鈕來控制攝像機的開和關
        if (GUI.Button(new Rect(100, 250, 100, 100), "ON/OFF"))
        {
            if (_webCamera != null && rawImage != null)
            {

                if (_webCamera.isPlaying)
                    StopCamera();
                else
                    PlayCamera();
            }
        }
        if (GUI.Button(new Rect(100, 450, 100, 100), "Quit"))
        {

            Application.Quit();
        }

    }

    public void PlayCamera()
    {
        //Plane.GetComponent<MeshRenderer>().enabled = true;
        rawImage.enabled = true;
        _webCamera.Play();
    }


    public void StopCamera()
    {
        // Plane.GetComponent<MeshRenderer>().enabled = false;
        rawImage.enabled = false;
        _webCamera.Stop();
    }

    /// <summary>  
    /// 初始化攝像頭
    /// </summary>  
    public IEnumerator InitCameraCor()
    {
        yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);
        if (Application.HasUserAuthorization(UserAuthorization.WebCam))
        {
            WebCamDevice[] devices = WebCamTexture.devices;
            DeviceName = devices[0].name;
            _webCamera = new WebCamTexture(DeviceName, 1920, 1080, 60);

            rawImage.texture = _webCamera;
            //Plane.GetComponent<Renderer>().material.mainTexture = _webCamera;
            //Plane.transform.localScale = new Vector3(1, 1, 1);

            _webCamera.Play();
            //前置後置攝像頭需要旋轉一定角度，否則畫面是不正確的,必須置於Play()函式後
            rawImage.rectTransform.localEulerAngles = new Vector3(0, 0,_webCamera.videoRotationAngle+360);
        }
    }
}

3、執行結果