Microsoft HoloLens 圖像捕獲不起作用

Question

我正在嘗試使用 HoloLens 捕獲圖像。 我接受使用 HoloLens 相機的許可。

我正在使用此代碼

using UnityEngine;
using System.Collections;
using System.Linq;
using UnityEngine.XR.WSA.WebCam;
using UnityEngine.UI;

public class WebCamera : MonoBehaviour
{
    PhotoCapture photoCaptureObject = null;
    Texture2D targetTexture = null;


    // Use this for initialization
    void Start()
    {
        Resolution cameraResolution = PhotoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();
        targetTexture = new Texture2D(cameraResolution.width, cameraResolution.height);

        // Create a PhotoCapture object
        PhotoCapture.CreateAsync(false, delegate (PhotoCapture captureObject) {
            photoCaptureObject = captureObject;
            CameraParameters cameraParameters = new CameraParameters();
            cameraParameters.hologramOpacity = 0.0f;
            cameraParameters.cameraResolutionWidth = cameraResolution.width;
            cameraParameters.cameraResolutionHeight = cameraResolution.height;
            cameraParameters.pixelFormat = CapturePixelFormat.BGRA32;

            // Activate the camera
            photoCaptureObject.StartPhotoModeAsync(cameraParameters, delegate (PhotoCapture.PhotoCaptureResult result) {
                // Take a picture
                photoCaptureObject.TakePhotoAsync(OnCapturedPhotoToMemory);
            });
        });
    }

    void OnCapturedPhotoToMemory(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)
    {
        // Copy the raw image data into the target texture

        photoCaptureFrame.UploadImageDataToTexture(targetTexture);

        // Create a GameObject to which the texture can be applied
        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);

        // Deactivate the camera
        photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);
    }

    void OnStoppedPhotoMode(PhotoCapture.PhotoCaptureResult result)
    {
        // Shutdown the photo capture resource
        photoCaptureObject.Dispose();
        photoCaptureObject = null;
    }
}

此腳本附加到一個空游戲 object。

我收到以下錯誤

ArgumentNullException:  Value cannot be null
Parameter name: shader.UnityEngine.Material..ctor(UnityEngine.Shader shader) (at <00000000000000000000>:0)

請任何人都可以幫助捕獲圖像。 我在哪里 go 錯了？

Answer 1

它正在尋找位於此處的着色器，“Custom/Unlit/UnlitTexture”。 這可能不可用。 我建議注釋掉該行以確定它周圍的其他代碼是否有效。

Answer 2

您必須進行 2 項更改：

1. 在 Unity 編輯器中，編輯 > 項目設置 > 圖形 > 到列表“始終包含的着色器”，添加“無光照/紋理”

2. 將代碼中的行更新為 Shader.Find("Unlit/Texture");