// Filament 3D Engine val engine = rememberEngine() // Asset loaders val modelLoader = rememberModelLoader(engine) val materialLoader = rememberMaterialLoader(engine) val environmentLoader = rememberEnvironmentLoader(engine) Scene( modifier = Modifier.fillMaxSize(), engine = engine, // Core rendering components view = rememberView(engine), renderer = rememberRenderer(engine), scene = rememberScene(engine), // Asset loaders modelLoader = modelLoader, materialLoader = materialLoader, environmentLoader = environmentLoader, // Collision System collisionSystem = rememberCollisionSystem(view) // Add a direct light source (required for shadows) mainLightNode = rememberMainLightNode(engine) { intensity = 100_000.0f }, // Set up environment lighting and skybox from an HDR file environment = rememberEnvironment(environmentLoader) { environmentLoader.createHDREnvironment( assetFileLocation = "environments/sky_2k.hdr" )!! }, // Configure camera position cameraNode = rememberCameraNode(engine) { position = Position(z = 4.0f) }, // Enable user interaction with the camera cameraManipulator = rememberCameraManipulator(), // Add 3D models and objects to the scene childNodes = rememberNodes { // Add a glTF model add( ModelNode( // Create a single instance model from assets file modelInstance = modelLoader.createModelInstance( assetFileLocation = "models/damaged_helmet.glb" ), // Make the model fit into a 1 unit cube scaleToUnits = 1.0f ) ) // Add a 3D cylinder with custom material add( CylinderNode( engine = engine, radius = 0.2f, height = 2.0f, // Simple colored material with physics properties materialInstance = materialLoader.createColorInstance( color = Color.Blue, metallic = 0.5f, roughness = 0.2f, reflectance = 0.4f ) ).apply { // Define the node position and rotation  transform( position = Position(y = 1.0f), rotation = Rotation(x = 90.0f) ) }) }, // Handle user interactions onGestureListener = rememberOnGestureListener( onDoubleTapEvent = { event, tappedNode -> tappedNode?.let { it.scale *= 2.0f } } ), // Handle tap event on the scene onTouchEvent = { event: MotionEvent, hitResult: HitResult? -> hitResult?.let { println("World tapped : ${it.worldPosition}") } false }, // Frame update callback onFrame = { frameTimeNanos -> // Handle per-frame updates here } )

ARScene( // Configure AR session features sessionFeatures = setOf(), sessionCameraConfig = null, // Configure AR session settings sessionConfiguration = { session, config -> // Enable depth if supported on the device config.depthMode = when (session.isDepthModeSupported(Config.DepthMode.AUTOMATIC)) { true -> Config.DepthMode.AUTOMATIC else -> Config.DepthMode.DISABLED } config.instantPlacementMode = Config.InstantPlacementMode.LOCAL_Y_UP config.lightEstimationMode = Config.LightEstimationMode.ENVIRONMENTAL_HDR }, // Enable plane detection visualization planeRenderer = true, // Configure camera stream cameraStream = rememberARCameraStream(materialLoader), // Session lifecycle callbacks onSessionCreated = { session -> // Handle session creation }, onSessionResumed = { session -> // Handle session resume }, onSessionPaused = { session -> // Handle session pause }, // Frame update callback onSessionUpdated = { session, updatedFrame -> // Process AR frame updates }, // Error handling onSessionFailed = { exception -> // Handle ARCore session errors }, // Track camera tracking state changes onTrackingFailureChanged = { trackingFailureReason -> // Handle tracking failures } )