unity—— device camera

在不用ar插件的情况下，想要实现摄像机的效果，在这里可以使用 WebCamTexture
废话不多说，先上代码
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PhoneCamera : MonoBehaviour {

private bool camAvailable;
private WebCamTexture backCam;
private Texture defalutBackground;

public RawImage background;
public AspectRatioFitter fit;


private void Start()
{
    defalutBackground = background.texture;
    WebCamDevice[] devices = WebCamTexture.devices;

    if(devices.Length == 0)
    {
        Debug.Log("NO camera detected");
        camAvailable = false;
        return;
    }

    for(int i =0; i< devices.Length; i++)
    {
        if(!devices[i].isFrontFacing)
        {
            backCam = new WebCamTexture(devices[i].name,Screen.width,Screen.height);
        }
    }


    if(backCam == null)
    {
        Debug.Log("Unable to find back camera");
        return;
    }

    backCam.Play();
    background.texture = backCam;

    camAvailable = true;
}


void Update()
{
    if(!camAvailable)
    {
        return;
    }
  // 获取设备的长宽比例
    float ratio = (float)backCam.width / (float)backCam.height;
    fit.aspectRatio = ratio;

// 如果视频为镜像，则y为-1 ，即翻转过来
float scaleY = backCam.videoVerticallyMirrored ? -1f : 1f;
background.rectTransform.localScale = new Vector3(1f,scaleY,1f);
// webcamTexture 旋转z轴，负数时才为顺时针
int orient = -backCam.videoRotationAngle;
background.rectTransform.localEulerAngles = new Vector3(0,0,orient);
}
}
该脚本拖给MainCamera
RawImage 设置如下

Paste_Image.png
这里要注意Canvas的 Scaler 设置为 Scale with Screen Size,填写手机相对应的分辨率
over ~！