Grabbed object with custom pose "wiggles" when moving controller or hands rapidly back and forth
I posted an issue at https://github.com/oculus-samples/Unreal-InteractionSDK-Sample/issues/16 but adding here for visibility also. I found that if I grabbed an object with a custom pose and moved the controller back and forth quickly the grabbed object doesn't seem to to track my virtual hand quite right. It kind of looks like the object "wiggles" or jiggles/lags behind the hands. This was only happening with pose mode set to "Snap Object to Pose". I tracked it down to CalculateInteractorSnapTransform() in OculusInteraction\Private\Interaction\Grabbable\IsdkGrabTransformerComponent.cpp but I'm not sure the best way to fix. I notice some of the other branches in UIsdkGrabTransformerComponent::UpdateTransform() end up calling TransformTarget->SetRelativeTransform(TargetRelativeTransform); which doesn't exhibit the issue. Hands tracking also seems to have the same issue. I asked Gemini for a solution and it suggested this code: FTransform UIsdkGrabTransformerComponent::CalculateInteractorSnapTransform( FTransform& TargetTransformIn, FTransform& InteractorTransformIn) { const FTransform OffsetInverse = InteractorSnapOffset.Inverse(); const FTransform FinalTransform = OffsetInverse * InteractorTransformIn; return FinalTransform; } It did fix the problem, but I'm not sure what other purposes the original code had as it was more complex. Thanks!53Views0likes0Comments
Meta files that fail on Mac due to hardcoded Windows-style path\filename
Is there a maintained list of Meta UE source files (.cpp/.h) that hardcode Windows-style backslashes in file paths (e.g., path\filename instead of path/filename)? On macOS, those paths aren’t valid and have been breaking packaging/deployment (and sometimes Xcode builds) for me. I’ve confirmed at least two instances and suspect more. A complete inventory would let me verify whether this is the root cause of my Mac build/deploy failures and fix them efficiently.70Views0likes2Comments
ETA on MetaXR plugin with UE5.6 support?
Is there anyone on here who works for Meta and can give an indication of when the MetaXR and Meta Platform plugins will be upgraded to support ue5.6? Using UE5.5 with OVR API enabled via the MetaXR plugin creates a visual cutoff artifact in non-opaque materials and some opaque materials in a far right sliver of the right display, as discussed in This Thread. It seems that 5.6 potentially does not have this issue, so I'm left waiting either for a 5.5 version of the MetaXR plugin that fixes this artifact or a 5.6 version.108Views0likes1Comment[Quest 3] Accessing Camera via Android Camera2 API - Process Succeeds but Image is Black
Hello everyone, I'm developing a native Android application (integrated with Unreal Engine) for the Meta Quest 3. My goal is to programmatically capture a still image from the passthrough camera using the standard Android Camera2 API. First, I want to emphasize that the standard, system-level Passthrough feature works perfectly in the headset. To be clear, I already have Passthrough enabled and working correctly inside my Unreal app. I can see the live camera feed, which confirms the basic functionality is there. My issue is specifically with capturing a still image programmatically. While my code executes without errors and saves a file, the resulting image is always completely black. I'm aware that this was a known limitation on older OS versions. However, I was under the impression this was resolved starting with software v67, based on the official documentation here: https://developers.meta.com/horizon/documentation/native/android/pca-native-documentation Given that my headset is on a much newer version, I'm struggling to understand what I'm still missing. Here's a summary of my setup and what I've confirmed: Android Manifest & Permissions: MyAndroidManifest.xmlis configured according to the documentation and includes all necessary features and permissions. I can confirm through logs that the user grants the runtime permissions (CAMERA and HEADSET_CAMERA) successfully. Here are the relevant entries from my manifest: <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="horizonos.permission.HEADSET_CAMERA"/> <uses-feature android:name="android.hardware.camera2.any" android:required="true"/> <uses-feature android:name="com.oculus.feature.PASSTHROUGH" android:required="true"/> Camera Discovery: I am using the standardCamera2API to find the correct passthrough camera device. This part of the code works perfectly—I successfully identify the camera ID by checking CameraCharacteristics for the Meta-specific metadata key (com.meta.extra_metadata.camera_source). The Problem: The Black Image My code successfully opens the camera, creates a capture session, captures an image, and saves a JPEG file. The entire process completes without any exceptions, and my native function receives a "success" code. However, the saved JPEG file is always completely black. My system version is: v79.1032 so as my per understanding of https://developers.meta.com/horizon/documentation/native/android/pca-native-documentation It should work My Java class which is called to save the image, hello method is invoked to capture the image: package com.jaszczurcompany.camerahelper; import android.Manifest; import android.app.Activity; import android.content.ContentValues; import android.content.pm.PackageManager; import android.graphics.ImageFormat; import android.graphics.SurfaceTexture; import android.hardware.camera2.*; import android.hardware.camera2.params.StreamConfigurationMap; import android.media.Image; import android.media.ImageReader; import android.os.Build; import android.os.Environment; import android.os.Handler; import android.os.HandlerThread; import android.provider.MediaStore; import android.util.Log; import android.util.Size; import android.view.Surface; import androidx.annotation.NonNull; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; import java.io.OutputStream; import java.nio.ByteBuffer; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.Locale; import java.util.concurrent.CountDownLatch; import java.util.concurrent.Semaphore; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicInteger; public class CameraHelper { private static final String TAG = "FooTag"; // Zmieniono TAG, aby pasował do Twoich logów public static final int SUCCESS = 0; // ... (reszta kodów bez zmian) public static final int ERROR_NO_CAMERA_FEATURE = -2; public static final int ERROR_MISSING_PERMISSIONS = -3; public static final int ERROR_CAMERA_MANAGER_UNAVAILABLE = -4; public static final int ERROR_NO_PASSTHROUGH_CAMERA_FOUND = -5; public static final int ERROR_CAMERA_ACCESS_DENIED = -6; public static final int ERROR_CAMERA_SESSION_FAILED = -7; public static final int ERROR_CAPTURE_FAILED = -8; public static final int ERROR_IMAGE_SAVE_FAILED = -9; public static final int ERROR_TIMEOUT = -10; public static final int ERROR_INTERRUPTED = -11; public static final int ERROR_UNSUPPORTED_CONFIGURATION = -12; private static final String META_PASSTHROUGH_CAMERA_KEY_NAME = "com.meta.extra_metadata.camera_source"; private static final byte META_PASSTHROUGH_CAMERA_VALUE = 1; private final Activity activity; private CameraManager cameraManager; private CameraDevice cameraDevice; private CameraCaptureSession captureSession; private ImageReader imageReader; private Handler backgroundHandler; private HandlerThread backgroundThread; private SurfaceTexture dummyPreviewTexture; private Surface dummyPreviewSurface; private final CountDownLatch operationCompleteLatch = new CountDownLatch(1); private final AtomicInteger resultCode = new AtomicInteger(SUCCESS); private final Semaphore cameraOpenCloseLock = new Semaphore(1); public CameraHelper(@NonNull Activity activity) { this.activity = activity; } public int hello() { Log.d(TAG, "Starting hello() sequence using Camera2 API (Two-Session approach)."); // ... (wstępne sprawdzenia są takie same) if (!activity.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY)) return ERROR_NO_CAMERA_FEATURE; cameraManager = (CameraManager) activity.getSystemService(Activity.CAMERA_SERVICE); if (cameraManager == null) return ERROR_CAMERA_MANAGER_UNAVAILABLE; if (!checkPermissions()) return ERROR_MISSING_PERMISSIONS; try { startBackgroundThread(); if (!cameraOpenCloseLock.tryAcquire(5, TimeUnit.SECONDS)) return ERROR_TIMEOUT; String cameraId = findPassthroughCameraId(cameraManager); if (cameraId == null) { setResult(ERROR_NO_PASSTHROUGH_CAMERA_FOUND); } else { openCamera(cameraId); } if (!operationCompleteLatch.await(15, TimeUnit.SECONDS)) setResult(ERROR_TIMEOUT); } catch (InterruptedException e) { Thread.currentThread().interrupt(); setResult(ERROR_INTERRUPTED); } catch (CameraAccessException e) { setResult(ERROR_CAMERA_ACCESS_DENIED); } finally { cleanup(); } Log.i(TAG, "hello() returned " + resultCode.get()); return resultCode.get(); } // Zmieniono nazwę, aby nie mylić z prośbą o uprawnienia private boolean checkPermissions() { String[] requiredPermissions = {Manifest.permission.CAMERA, "horizonos.permission.HEADSET_CAMERA"}; return Arrays.stream(requiredPermissions) .allMatch(p -> ContextCompat.checkSelfPermission(activity, p) == PackageManager.PERMISSION_GRANTED); } private String findPassthroughCameraId(CameraManager manager) throws CameraAccessException { // ... (bez zmian) final CameraCharacteristics.Key<Byte> metaCameraSourceKey = new CameraCharacteristics.Key<>(META_PASSTHROUGH_CAMERA_KEY_NAME, Byte.class); for (String cameraId : manager.getCameraIdList()) { CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); Byte cameraSourceValue = characteristics.get(metaCameraSourceKey); if (cameraSourceValue != null && cameraSourceValue == META_PASSTHROUGH_CAMERA_VALUE) return cameraId; } return null; } private void openCamera(String cameraId) throws CameraAccessException { // ... (konfiguracja imageReader i dummyPreviewSurface bez zmian) CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(cameraId); StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); if (map == null) { setResult(ERROR_UNSUPPORTED_CONFIGURATION); return; } Size largestSize = Arrays.stream(map.getOutputSizes(ImageFormat.JPEG)).max(Comparator.comparing(s -> (long) s.getWidth() * s.getHeight())).orElse(new Size(1280, 720)); Log.d(TAG, "Selected JPEG size: " + largestSize); imageReader = ImageReader.newInstance(largestSize.getWidth(), largestSize.getHeight(), ImageFormat.JPEG, 1); imageReader.setOnImageAvailableListener(this::onImageAvailable, backgroundHandler); dummyPreviewTexture = new SurfaceTexture(10); dummyPreviewTexture.setDefaultBufferSize(640, 480); dummyPreviewSurface = new Surface(dummyPreviewTexture); if (ActivityCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) return; cameraManager.openCamera(cameraId, cameraStateCallback, backgroundHandler); } private final CameraDevice.StateCallback cameraStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice camera) { cameraOpenCloseLock.release(); cameraDevice = camera; createPreviewSession(); // ZACZNIJ OD SESJI PODGLĄDU } @Override public void onDisconnected(@NonNull CameraDevice camera) { /* ... bez zmian ... */ cameraOpenCloseLock.release(); setResult(ERROR_CAMERA_ACCESS_DENIED); camera.close(); } @Override public void onError(@NonNull CameraDevice camera, int error) { /* ... bez zmian ... */ cameraOpenCloseLock.release(); setResult(ERROR_CAMERA_ACCESS_DENIED); camera.close(); } }; /** KROK 1: Utwórz i uruchom sesję TYLKO dla podglądu, aby rozgrzać sensor. */ private void createPreviewSession() { try { CaptureRequest.Builder previewRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); previewRequestBuilder.addTarget(dummyPreviewSurface); cameraDevice.createCaptureSession(Collections.singletonList(dummyPreviewSurface), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession session) { captureSession = session; try { session.setRepeatingRequest(previewRequestBuilder.build(), null, backgroundHandler); Log.d(TAG, "Preview started for warm-up. Waiting 1s..."); backgroundHandler.postDelayed(() -> { // Po opóźnieniu, zatrzymaj podgląd i zacznij przechwytywanie stopPreviewAndStartCapture(); }, 1000); } catch (CameraAccessException e) { setResult(ERROR_CAPTURE_FAILED); } } @Override public void onConfigureFailed(@NonNull CameraCaptureSession session) { setResult(ERROR_CAMERA_SESSION_FAILED); } }, backgroundHandler); } catch (CameraAccessException e) { setResult(ERROR_CAMERA_SESSION_FAILED); } } /** KROK 2: Zatrzymaj sesję podglądu i utwórz nową sesję do zrobienia zdjęcia. */ private void stopPreviewAndStartCapture() { try { captureSession.stopRepeating(); captureSession.close(); // Zamknij starą sesję Log.d(TAG, "Preview stopped. Creating capture session..."); // Utwórz nową sesję TYLKO dla ImageReader cameraDevice.createCaptureSession(Collections.singletonList(imageReader.getSurface()), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession session) { captureSession = session; captureImage(); // Zrób zdjęcie używając nowej sesji } @Override public void onConfigureFailed(@NonNull CameraCaptureSession session) { setResult(ERROR_CAMERA_SESSION_FAILED); } }, backgroundHandler); } catch (CameraAccessException e) { setResult(ERROR_CAPTURE_FAILED); } } /** KROK 3: Zrób pojedyncze zdjęcie. */ private void captureImage() { try { Log.d(TAG, "Capturing image with dedicated session..."); CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); captureBuilder.addTarget(imageReader.getSurface()); captureSession.capture(captureBuilder.build(), null, backgroundHandler); } catch (CameraAccessException e) { setResult(ERROR_CAPTURE_FAILED); } } private void onImageAvailable(ImageReader reader) { // ... (bez zmian) try (Image image = reader.acquireLatestImage()) { if (image == null) return; ByteBuffer buffer = image.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes); saveImage(bytes); } catch (Exception e) { setResult(ERROR_IMAGE_SAVE_FAILED); } } private void saveImage(byte[] bytes) { // ... (bez zmian) String fileName = "IMG_" + new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US).format(new Date()) + ".jpg"; ContentValues values = new ContentValues(); values.put(MediaStore.MediaColumns.DISPLAY_NAME, fileName); values.put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg"); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { values.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS); } android.net.Uri uri = activity.getContentResolver().insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, values); if (uri == null) { setResult(ERROR_IMAGE_SAVE_FAILED); return; } try (OutputStream os = activity.getContentResolver().openOutputStream(uri)) { if (os == null) throw new java.io.IOException("Output stream is null."); os.write(bytes); setResult(SUCCESS); } catch (java.io.IOException e) { setResult(ERROR_IMAGE_SAVE_FAILED); } } private void setResult(int code) { // ... (bez zmian) if (resultCode.compareAndSet(SUCCESS, code)) { operationCompleteLatch.countDown(); } } // ... (metody start/stop background thread i cleanup są takie same, bez większych zmian) private void startBackgroundThread() { /* ... bez zmian ... */ backgroundThread = new HandlerThread("CameraBackground"); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); } private void stopBackgroundThread() { /* ... bez zmian ... */ if (backgroundThread != null) { backgroundThread.quitSafely(); try { backgroundThread.join(1000); } catch (InterruptedException e) { /* ignore */ } backgroundThread = null; backgroundHandler = null; } } private void cleanup() { try { if (!cameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) Log.e(TAG, "Cleanup timeout."); } catch (InterruptedException e) { Thread.currentThread().interrupt(); } try { if (captureSession != null) { captureSession.close(); captureSession = null; } if (cameraDevice != null) { cameraDevice.close(); cameraDevice = null; } if (imageReader != null) { imageReader.close(); imageReader = null; } if (dummyPreviewSurface != null) { dummyPreviewSurface.release(); dummyPreviewSurface = null; } if (dummyPreviewTexture != null) { dummyPreviewTexture.release(); dummyPreviewTexture = null; } } finally { cameraOpenCloseLock.release(); stopBackgroundThread(); } } } From logcat I see that it succeeded but the output image is still black.267Views1like1Comment
Unreal 5.2 android build freezing at inconsistent times on Quest 3
I'm currently working on a android project of which I'm building to the Quest 3. Im running into an issue where at inconsistent times the game freezes the current perspective, and I'm able to look behind me to see an upside down version of the frozen view. After this point the only way to leave the game is by force quitting from the Quest menu. I haven't found any other posts talking about this particular crash with the reversed view and was wondering if anyone had encountered this before or has any tips on solving the cause. Thanks in advance!693Views0likes0Comments