HoloLens开发——Locatable camera in Unity

参考：

https://developer.microsoft.com/en-us/windows/mixed-reality/locatable_camera_in_unity

http://www.cnblogs.com/mantgh/p/5667385.html

1.Capture a Photo to a File 捕获照片到文件

可通过HoloLens PC网页端打开文件搜索，找到相应APP下文件图像信息

2.Capture a Photo to a Texture2D 捕获文件到Texture2D对象

在这里，可以在Unity中cube上的材质显示图片

源代码：

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.VR.WSA.WebCam; using System.Linq; public class PhotoCaptureCamera : MonoBehaviour {     PhotoCapture photoCaptureObject = null;     void Start()     {         PhotoCapture.CreateAsync(false, OnPhotoCaptureCreated);     }     void OnPhotoCaptureCreated(PhotoCapture captureObject)     {         photoCaptureObject = captureObject;         Resolution cameraResolution = PhotoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();         CameraParameters c = new CameraParameters();         c.hologramOpacity = 0.0f;         c.cameraResolutionWidth = cameraResolution.width;         c.cameraResolutionHeight = cameraResolution.height;         c.pixelFormat = CapturePixelFormat.BGRA32;        // captureObject.StartPhotoModeAsync(c, false, OnPhotoModeStarted);         captureObject.StartPhotoModeAsync(c,OnPhotoModeStarted);     }     void OnStoppedPhotoMode(PhotoCapture.PhotoCaptureResult result)     {         photoCaptureObject.Dispose();         photoCaptureObject = null;     }     //Capture a Photo to a File 捕获照片到文件     /*     private void OnPhotoModeStarted(PhotoCapture.PhotoCaptureResult result)     {         if (result.success)         {             string filename = string.Format(@"CapturedImage{0}_n.jpg", Time.time);             string filePath = System.IO.Path.Combine(Application.persistentDataPath, filename);             photoCaptureObject.TakePhotoAsync(filePath, PhotoCaptureFileOutputFormat.JPG, OnCapturedPhotoToDisk);         }         else         {             Debug.LogError("Unable to start photo mode!");         }     }     void OnCapturedPhotoToDisk(PhotoCapture.PhotoCaptureResult result)     {         if (result.success)         {             Debug.Log("Saved Photo to disk!");             photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);         }         else         {             Debug.Log("Failed to save Photo to disk");         }     }     */     //Capture a Photo to a Texture2D 捕获文件到Texture2D对象     private void OnPhotoModeStarted(PhotoCapture.PhotoCaptureResult result)     {         if (result.success)         {             photoCaptureObject.TakePhotoAsync(OnCapturedPhotoToMemory);         }         else         {             Debug.LogError("Unable to start photo mode!");         }     }     void OnCapturedPhotoToMemory(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)     {         if (result.success)         {             // 使用正确分辨率创建Texture2D对象             Resolution cameraResolution = PhotoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();             Texture2D targetTexture = new Texture2D(cameraResolution.width, cameraResolution.height);             // 将图像数据拷贝到Texture2D对象中             photoCaptureFrame.UploadImageDataToTexture(targetTexture);             // 进一步使用Texture2D对象，比如赋给材质神马的                         // Create a gameobject that we can apply our texture to             GameObject quad = GameObject.CreatePrimitive(PrimitiveType.Quad);             Renderer quadRenderer = quad.GetComponent<Renderer>() as Renderer;             quadRenderer.material = new Material(Shader.Find("Custom/Unlit/UnlitTexture"));             quad.transform.parent = this.transform;             quad.transform.localPosition = new Vector3(0.0f, 0.0f, 3.0f);             quadRenderer.material.SetTexture("_MainTex", targetTexture);                      }         // 清理相机         photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);     }     //Capture a Photo and Interact with the Raw bytes 捕获照片并和原始数据交互     /*     void OnCapturedPhotoToMemory(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)     {         if (result.success)         {             List<byte> imageBufferList = new List<byte>();             // 复制原始 IMFMediaBuffer 数据到空的list             photoCaptureFrame.CopyRawImageDataIntoBuffer(imageBufferList);             //本例使用 BGRA32 格式捕获照片.             int stride = 4;             float denominator = 1.0f / 255.0f;             List<Color> colorArray = new List<Color>();             for (int i = imageBufferList.Count - 1; i >= 0; i -= stride)             {                 float a = (int)(imageBufferList[i - 0]) * denominator;                 float r = (int)(imageBufferList[i - 1]) * denominator;                 float g = (int)(imageBufferList[i - 2]) * denominator;                 float b = (int)(imageBufferList[i - 3]) * denominator;                 colorArray.Add(new Color(r, g, b, a));             }             // 接下来可以把list用做进一步的处理         }         photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);     }     */     // Update is called once per frame     void Update () { } }