| 1 |
- {"ast":null,"code":"import _asyncToGenerator from \"F:/workspace/202226701027/huinongbao-app/node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js\";\nimport { Observable } from \"../Misc/observable.js\";\nimport { WebXRSessionManager } from \"./webXRSessionManager.js\";\nimport { WebXRCamera } from \"./webXRCamera.js\";\nimport { WebXRFeatureName, WebXRFeaturesManager } from \"./webXRFeaturesManager.js\";\nimport { Logger } from \"../Misc/logger.js\";\nimport { UniversalCamera } from \"../Cameras/universalCamera.js\";\nimport { Quaternion, Vector3 } from \"../Maths/math.vector.js\";\nimport { AbstractEngine } from \"../Engines/abstractEngine.js\";\n/**\n * Base set of functionality needed to create an XR experience (WebXRSessionManager, Camera, StateManagement, etc.)\n * @see https://doc.babylonjs.com/features/featuresDeepDive/webXR/webXRExperienceHelpers\n */\nexport class WebXRExperienceHelper {\n /**\n * Creates a WebXRExperienceHelper\n * @param _scene The scene the helper should be created in\n */\n constructor(_scene) {\n this._scene = _scene;\n this._nonVRCamera = null;\n this._attachedToElement = false;\n this._spectatorCamera = null;\n this._originalSceneAutoClear = true;\n this._supported = false;\n this._spectatorMode = false;\n this._lastTimestamp = 0;\n /**\n * Observers registered here will be triggered after the camera's initial transformation is set\n * This can be used to set a different ground level or an extra rotation.\n *\n * Note that ground level is considered to be at 0. The height defined by the XR camera will be added\n * to the position set after this observable is done executing.\n */\n this.onInitialXRPoseSetObservable = new Observable();\n /**\n * Fires when the state of the experience helper has changed\n */\n this.onStateChangedObservable = new Observable();\n /**\n * The current state of the XR experience (eg. transitioning, in XR or not in XR)\n */\n this.state = 3 /* WebXRState.NOT_IN_XR */;\n this.sessionManager = new WebXRSessionManager(_scene);\n this.camera = new WebXRCamera(\"webxr\", _scene, this.sessionManager);\n this.featuresManager = new WebXRFeaturesManager(this.sessionManager);\n _scene.onDisposeObservable.addOnce(() => {\n this.dispose();\n });\n }\n /**\n * Creates the experience helper\n * @param scene the scene to attach the experience helper to\n * @returns a promise for the experience helper\n */\n static CreateAsync(scene) {\n const helper = new WebXRExperienceHelper(scene);\n return helper.sessionManager.initializeAsync().then(() => {\n helper._supported = true;\n return helper;\n }).catch(e => {\n helper._setState(3 /* WebXRState.NOT_IN_XR */);\n helper.dispose();\n throw e;\n });\n }\n /**\n * Disposes of the experience helper\n */\n dispose() {\n var _this$_spectatorCamer;\n this.exitXRAsync();\n this.camera.dispose();\n this.onStateChangedObservable.clear();\n this.onInitialXRPoseSetObservable.clear();\n this.sessionManager.dispose();\n (_this$_spectatorCamer = this._spectatorCamera) === null || _this$_spectatorCamer === void 0 || _this$_spectatorCamer.dispose();\n if (this._nonVRCamera) {\n this._scene.activeCamera = this._nonVRCamera;\n }\n }\n /**\n * Enters XR mode (This must be done within a user interaction in most browsers eg. button click)\n * @param sessionMode options for the XR session\n * @param referenceSpaceType frame of reference of the XR session\n * @param renderTarget the output canvas that will be used to enter XR mode\n * @param sessionCreationOptions optional XRSessionInit object to init the session with\n * @returns promise that resolves after xr mode has entered\n */\n enterXRAsync(sessionMode, referenceSpaceType, renderTarget = this.sessionManager.getWebXRRenderTarget(), sessionCreationOptions = {}) {\n var _this = this;\n return _asyncToGenerator(function* () {\n if (!_this._supported) {\n // eslint-disable-next-line no-throw-literal\n throw \"WebXR not supported in this browser or environment\";\n }\n _this._setState(0 /* WebXRState.ENTERING_XR */);\n if (referenceSpaceType !== \"viewer\" && referenceSpaceType !== \"local\") {\n sessionCreationOptions.optionalFeatures = sessionCreationOptions.optionalFeatures || [];\n sessionCreationOptions.optionalFeatures.push(referenceSpaceType);\n }\n sessionCreationOptions = yield _this.featuresManager._extendXRSessionInitObject(sessionCreationOptions);\n // we currently recommend \"unbounded\" space in AR (#7959)\n if (sessionMode === \"immersive-ar\" && referenceSpaceType !== \"unbounded\") {\n Logger.Warn(\"We recommend using 'unbounded' reference space type when using 'immersive-ar' session mode\");\n }\n // make sure that the session mode is supported\n try {\n var _this$_nonVRCamera, _this$_nonVRCamera2, _AbstractEngine$audio;\n yield _this.sessionManager.initializeSessionAsync(sessionMode, sessionCreationOptions);\n yield _this.sessionManager.setReferenceSpaceTypeAsync(referenceSpaceType);\n const xrRenderState = {\n // if maxZ is 0 it should be \"Infinity\", but it doesn't work with the WebXR API. Setting to a large number.\n depthFar: _this.camera.maxZ || 10000,\n depthNear: _this.camera.minZ\n };\n // The layers feature will have already initialized the xr session's layers on session init.\n if (!_this.featuresManager.getEnabledFeature(WebXRFeatureName.LAYERS)) {\n const baseLayer = yield renderTarget.initializeXRLayerAsync(_this.sessionManager.session);\n xrRenderState.baseLayer = baseLayer;\n }\n _this.sessionManager.updateRenderState(xrRenderState);\n // run the render loop\n _this.sessionManager.runXRRenderLoop();\n // Cache pre xr scene settings\n _this._originalSceneAutoClear = _this._scene.autoClear;\n _this._nonVRCamera = _this._scene.activeCamera;\n _this._attachedToElement = !!((_this$_nonVRCamera = _this._nonVRCamera) !== null && _this$_nonVRCamera !== void 0 && (_this$_nonVRCamera = _this$_nonVRCamera.inputs) !== null && _this$_nonVRCamera !== void 0 && _this$_nonVRCamera.attachedToElement);\n (_this$_nonVRCamera2 = _this._nonVRCamera) === null || _this$_nonVRCamera2 === void 0 || _this$_nonVRCamera2.detachControl();\n _this._scene.activeCamera = _this.camera;\n // do not compensate when AR session is used\n if (sessionMode !== \"immersive-ar\") {\n _this._nonXRToXRCamera();\n } else {\n // Kept here, TODO - check if needed\n _this._scene.autoClear = false;\n _this.camera.compensateOnFirstFrame = false;\n // reset the camera's position to the origin\n _this.camera.position.set(0, 0, 0);\n _this.camera.rotationQuaternion.set(0, 0, 0, 1);\n _this.onInitialXRPoseSetObservable.notifyObservers(_this.camera);\n }\n // Vision Pro suspends the audio context when entering XR, so we resume it here if needed.\n (_AbstractEngine$audio = AbstractEngine.audioEngine) === null || _AbstractEngine$audio === void 0 || _AbstractEngine$audio._resumeAudioContextOnStateChange();\n _this.sessionManager.onXRSessionEnded.addOnce(() => {\n // when using the back button and not the exit button (default on mobile), the session is ending but the EXITING state was not set\n if (_this.state !== 1 /* WebXRState.EXITING_XR */) {\n _this._setState(1 /* WebXRState.EXITING_XR */);\n }\n // Reset camera rigs output render target to ensure sessions render target is not drawn after it ends\n _this.camera.rigCameras.forEach(c => {\n c.outputRenderTarget = null;\n });\n // Restore scene settings\n _this._scene.autoClear = _this._originalSceneAutoClear;\n _this._scene.activeCamera = _this._nonVRCamera;\n if (_this._attachedToElement && _this._nonVRCamera) {\n _this._nonVRCamera.attachControl(!!_this._nonVRCamera.inputs.noPreventDefault);\n }\n if (sessionMode !== \"immersive-ar\" && _this.camera.compensateOnFirstFrame) {\n if (_this._nonVRCamera.setPosition) {\n _this._nonVRCamera.setPosition(_this.camera.position);\n } else {\n _this._nonVRCamera.position.copyFrom(_this.camera.position);\n }\n }\n _this._setState(3 /* WebXRState.NOT_IN_XR */);\n });\n // Wait until the first frame arrives before setting state to in xr\n _this.sessionManager.onXRFrameObservable.addOnce(() => {\n _this._setState(2 /* WebXRState.IN_XR */);\n });\n return _this.sessionManager;\n } catch (e) {\n Logger.Log(e);\n Logger.Log(e.message);\n _this._setState(3 /* WebXRState.NOT_IN_XR */);\n throw e;\n }\n })();\n }\n /**\n * Exits XR mode and returns the scene to its original state\n * @returns promise that resolves after xr mode has exited\n */\n exitXRAsync() {\n // only exit if state is IN_XR\n if (this.state !== 2 /* WebXRState.IN_XR */) {\n return Promise.resolve();\n }\n this._setState(1 /* WebXRState.EXITING_XR */);\n return this.sessionManager.exitXRAsync();\n }\n /**\n * Enable spectator mode for desktop VR experiences.\n * When spectator mode is enabled a camera will be attached to the desktop canvas and will\n * display the first rig camera's view on the desktop canvas.\n * Please note that this will degrade performance, as it requires another camera render.\n * It is also not recommended to enable this in devices like the quest, as it brings no benefit there.\n * @param options giving WebXRSpectatorModeOption for specutator camera to setup when the spectator mode is enabled.\n */\n enableSpectatorMode(options) {\n if (!this._spectatorMode) {\n this._spectatorMode = true;\n this._switchSpectatorMode(options);\n }\n }\n /**\n * Disable spectator mode for desktop VR experiences.\n */\n disableSpecatatorMode() {\n if (this._spectatorMode) {\n this._spectatorMode = false;\n this._switchSpectatorMode();\n }\n }\n _switchSpectatorMode(options) {\n const fps = options !== null && options !== void 0 && options.fps ? options.fps : 1000.0;\n const refreshRate = 1.0 / fps * 1000.0;\n const cameraIndex = options !== null && options !== void 0 && options.preferredCameraIndex ? options === null || options === void 0 ? void 0 : options.preferredCameraIndex : 0;\n const updateSpectatorCamera = () => {\n if (this._spectatorCamera) {\n const delta = this.sessionManager.currentTimestamp - this._lastTimestamp;\n if (delta >= refreshRate) {\n this._lastTimestamp = this.sessionManager.currentTimestamp;\n this._spectatorCamera.position.copyFrom(this.camera.rigCameras[cameraIndex].globalPosition);\n this._spectatorCamera.rotationQuaternion.copyFrom(this.camera.rigCameras[cameraIndex].absoluteRotation);\n }\n }\n };\n if (this._spectatorMode) {\n if (cameraIndex >= this.camera.rigCameras.length) {\n throw new Error(\"the preferred camera index is beyond the length of rig camera array.\");\n }\n const onStateChanged = () => {\n if (this.state === 2 /* WebXRState.IN_XR */) {\n this._spectatorCamera = new UniversalCamera(\"webxr-spectator\", Vector3.Zero(), this._scene);\n this._spectatorCamera.rotationQuaternion = new Quaternion();\n this._scene.activeCameras = [this.camera, this._spectatorCamera];\n this.sessionManager.onXRFrameObservable.add(updateSpectatorCamera);\n this._scene.onAfterRenderCameraObservable.add(camera => {\n if (camera === this.camera) {\n // reset the dimensions object for correct resizing\n this._scene.getEngine().framebufferDimensionsObject = null;\n }\n });\n } else if (this.state === 1 /* WebXRState.EXITING_XR */) {\n this.sessionManager.onXRFrameObservable.removeCallback(updateSpectatorCamera);\n this._scene.activeCameras = null;\n }\n };\n this.onStateChangedObservable.add(onStateChanged);\n onStateChanged();\n } else {\n this.sessionManager.onXRFrameObservable.removeCallback(updateSpectatorCamera);\n this._scene.activeCameras = [this.camera];\n }\n }\n _nonXRToXRCamera() {\n this.camera.setTransformationFromNonVRCamera(this._nonVRCamera);\n this.onInitialXRPoseSetObservable.notifyObservers(this.camera);\n }\n _setState(val) {\n if (this.state === val) {\n return;\n }\n this.state = val;\n this.onStateChangedObservable.notifyObservers(this.state);\n }\n}","map":{"version":3,"names":["Observable","WebXRSessionManager","WebXRCamera","WebXRFeatureName","WebXRFeaturesManager","Logger","UniversalCamera","Quaternion","Vector3","AbstractEngine","WebXRExperienceHelper","constructor","_scene","_nonVRCamera","_attachedToElement","_spectatorCamera","_originalSceneAutoClear","_supported","_spectatorMode","_lastTimestamp","onInitialXRPoseSetObservable","onStateChangedObservable","state","sessionManager","camera","featuresManager","onDisposeObservable","addOnce","dispose","CreateAsync","scene","helper","initializeAsync","then","catch","e","_setState","_this$_spectatorCamer","exitXRAsync","clear","activeCamera","enterXRAsync","sessionMode","referenceSpaceType","renderTarget","getWebXRRenderTarget","sessionCreationOptions","_this","_asyncToGenerator","optionalFeatures","push","_extendXRSessionInitObject","Warn","_this$_nonVRCamera","_this$_nonVRCamera2","_AbstractEngine$audio","initializeSessionAsync","setReferenceSpaceTypeAsync","xrRenderState","depthFar","maxZ","depthNear","minZ","getEnabledFeature","LAYERS","baseLayer","initializeXRLayerAsync","session","updateRenderState","runXRRenderLoop","autoClear","inputs","attachedToElement","detachControl","_nonXRToXRCamera","compensateOnFirstFrame","position","set","rotationQuaternion","notifyObservers","audioEngine","_resumeAudioContextOnStateChange","onXRSessionEnded","rigCameras","forEach","c","outputRenderTarget","attachControl","noPreventDefault","setPosition","copyFrom","onXRFrameObservable","Log","message","Promise","resolve","enableSpectatorMode","options","_switchSpectatorMode","disableSpecatatorMode","fps","refreshRate","cameraIndex","preferredCameraIndex","updateSpectatorCamera","delta","currentTimestamp","globalPosition","absoluteRotation","length","Error","onStateChanged","Zero","activeCameras","add","onAfterRenderCameraObservable","getEngine","framebufferDimensionsObject","removeCallback","setTransformationFromNonVRCamera","val"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/core/XR/webXRExperienceHelper.js"],"sourcesContent":["import { Observable } from \"../Misc/observable.js\";\nimport { WebXRSessionManager } from \"./webXRSessionManager.js\";\nimport { WebXRCamera } from \"./webXRCamera.js\";\nimport { WebXRFeatureName, WebXRFeaturesManager } from \"./webXRFeaturesManager.js\";\nimport { Logger } from \"../Misc/logger.js\";\nimport { UniversalCamera } from \"../Cameras/universalCamera.js\";\nimport { Quaternion, Vector3 } from \"../Maths/math.vector.js\";\nimport { AbstractEngine } from \"../Engines/abstractEngine.js\";\n/**\n * Base set of functionality needed to create an XR experience (WebXRSessionManager, Camera, StateManagement, etc.)\n * @see https://doc.babylonjs.com/features/featuresDeepDive/webXR/webXRExperienceHelpers\n */\nexport class WebXRExperienceHelper {\n /**\n * Creates a WebXRExperienceHelper\n * @param _scene The scene the helper should be created in\n */\n constructor(_scene) {\n this._scene = _scene;\n this._nonVRCamera = null;\n this._attachedToElement = false;\n this._spectatorCamera = null;\n this._originalSceneAutoClear = true;\n this._supported = false;\n this._spectatorMode = false;\n this._lastTimestamp = 0;\n /**\n * Observers registered here will be triggered after the camera's initial transformation is set\n * This can be used to set a different ground level or an extra rotation.\n *\n * Note that ground level is considered to be at 0. The height defined by the XR camera will be added\n * to the position set after this observable is done executing.\n */\n this.onInitialXRPoseSetObservable = new Observable();\n /**\n * Fires when the state of the experience helper has changed\n */\n this.onStateChangedObservable = new Observable();\n /**\n * The current state of the XR experience (eg. transitioning, in XR or not in XR)\n */\n this.state = 3 /* WebXRState.NOT_IN_XR */;\n this.sessionManager = new WebXRSessionManager(_scene);\n this.camera = new WebXRCamera(\"webxr\", _scene, this.sessionManager);\n this.featuresManager = new WebXRFeaturesManager(this.sessionManager);\n _scene.onDisposeObservable.addOnce(() => {\n this.dispose();\n });\n }\n /**\n * Creates the experience helper\n * @param scene the scene to attach the experience helper to\n * @returns a promise for the experience helper\n */\n static CreateAsync(scene) {\n const helper = new WebXRExperienceHelper(scene);\n return helper.sessionManager\n .initializeAsync()\n .then(() => {\n helper._supported = true;\n return helper;\n })\n .catch((e) => {\n helper._setState(3 /* WebXRState.NOT_IN_XR */);\n helper.dispose();\n throw e;\n });\n }\n /**\n * Disposes of the experience helper\n */\n dispose() {\n this.exitXRAsync();\n this.camera.dispose();\n this.onStateChangedObservable.clear();\n this.onInitialXRPoseSetObservable.clear();\n this.sessionManager.dispose();\n this._spectatorCamera?.dispose();\n if (this._nonVRCamera) {\n this._scene.activeCamera = this._nonVRCamera;\n }\n }\n /**\n * Enters XR mode (This must be done within a user interaction in most browsers eg. button click)\n * @param sessionMode options for the XR session\n * @param referenceSpaceType frame of reference of the XR session\n * @param renderTarget the output canvas that will be used to enter XR mode\n * @param sessionCreationOptions optional XRSessionInit object to init the session with\n * @returns promise that resolves after xr mode has entered\n */\n async enterXRAsync(sessionMode, referenceSpaceType, renderTarget = this.sessionManager.getWebXRRenderTarget(), sessionCreationOptions = {}) {\n if (!this._supported) {\n // eslint-disable-next-line no-throw-literal\n throw \"WebXR not supported in this browser or environment\";\n }\n this._setState(0 /* WebXRState.ENTERING_XR */);\n if (referenceSpaceType !== \"viewer\" && referenceSpaceType !== \"local\") {\n sessionCreationOptions.optionalFeatures = sessionCreationOptions.optionalFeatures || [];\n sessionCreationOptions.optionalFeatures.push(referenceSpaceType);\n }\n sessionCreationOptions = await this.featuresManager._extendXRSessionInitObject(sessionCreationOptions);\n // we currently recommend \"unbounded\" space in AR (#7959)\n if (sessionMode === \"immersive-ar\" && referenceSpaceType !== \"unbounded\") {\n Logger.Warn(\"We recommend using 'unbounded' reference space type when using 'immersive-ar' session mode\");\n }\n // make sure that the session mode is supported\n try {\n await this.sessionManager.initializeSessionAsync(sessionMode, sessionCreationOptions);\n await this.sessionManager.setReferenceSpaceTypeAsync(referenceSpaceType);\n const xrRenderState = {\n // if maxZ is 0 it should be \"Infinity\", but it doesn't work with the WebXR API. Setting to a large number.\n depthFar: this.camera.maxZ || 10000,\n depthNear: this.camera.minZ,\n };\n // The layers feature will have already initialized the xr session's layers on session init.\n if (!this.featuresManager.getEnabledFeature(WebXRFeatureName.LAYERS)) {\n const baseLayer = await renderTarget.initializeXRLayerAsync(this.sessionManager.session);\n xrRenderState.baseLayer = baseLayer;\n }\n this.sessionManager.updateRenderState(xrRenderState);\n // run the render loop\n this.sessionManager.runXRRenderLoop();\n // Cache pre xr scene settings\n this._originalSceneAutoClear = this._scene.autoClear;\n this._nonVRCamera = this._scene.activeCamera;\n this._attachedToElement = !!this._nonVRCamera?.inputs?.attachedToElement;\n this._nonVRCamera?.detachControl();\n this._scene.activeCamera = this.camera;\n // do not compensate when AR session is used\n if (sessionMode !== \"immersive-ar\") {\n this._nonXRToXRCamera();\n }\n else {\n // Kept here, TODO - check if needed\n this._scene.autoClear = false;\n this.camera.compensateOnFirstFrame = false;\n // reset the camera's position to the origin\n this.camera.position.set(0, 0, 0);\n this.camera.rotationQuaternion.set(0, 0, 0, 1);\n this.onInitialXRPoseSetObservable.notifyObservers(this.camera);\n }\n // Vision Pro suspends the audio context when entering XR, so we resume it here if needed.\n AbstractEngine.audioEngine?._resumeAudioContextOnStateChange();\n this.sessionManager.onXRSessionEnded.addOnce(() => {\n // when using the back button and not the exit button (default on mobile), the session is ending but the EXITING state was not set\n if (this.state !== 1 /* WebXRState.EXITING_XR */) {\n this._setState(1 /* WebXRState.EXITING_XR */);\n }\n // Reset camera rigs output render target to ensure sessions render target is not drawn after it ends\n this.camera.rigCameras.forEach((c) => {\n c.outputRenderTarget = null;\n });\n // Restore scene settings\n this._scene.autoClear = this._originalSceneAutoClear;\n this._scene.activeCamera = this._nonVRCamera;\n if (this._attachedToElement && this._nonVRCamera) {\n this._nonVRCamera.attachControl(!!this._nonVRCamera.inputs.noPreventDefault);\n }\n if (sessionMode !== \"immersive-ar\" && this.camera.compensateOnFirstFrame) {\n if (this._nonVRCamera.setPosition) {\n this._nonVRCamera.setPosition(this.camera.position);\n }\n else {\n this._nonVRCamera.position.copyFrom(this.camera.position);\n }\n }\n this._setState(3 /* WebXRState.NOT_IN_XR */);\n });\n // Wait until the first frame arrives before setting state to in xr\n this.sessionManager.onXRFrameObservable.addOnce(() => {\n this._setState(2 /* WebXRState.IN_XR */);\n });\n return this.sessionManager;\n }\n catch (e) {\n Logger.Log(e);\n Logger.Log(e.message);\n this._setState(3 /* WebXRState.NOT_IN_XR */);\n throw e;\n }\n }\n /**\n * Exits XR mode and returns the scene to its original state\n * @returns promise that resolves after xr mode has exited\n */\n exitXRAsync() {\n // only exit if state is IN_XR\n if (this.state !== 2 /* WebXRState.IN_XR */) {\n return Promise.resolve();\n }\n this._setState(1 /* WebXRState.EXITING_XR */);\n return this.sessionManager.exitXRAsync();\n }\n /**\n * Enable spectator mode for desktop VR experiences.\n * When spectator mode is enabled a camera will be attached to the desktop canvas and will\n * display the first rig camera's view on the desktop canvas.\n * Please note that this will degrade performance, as it requires another camera render.\n * It is also not recommended to enable this in devices like the quest, as it brings no benefit there.\n * @param options giving WebXRSpectatorModeOption for specutator camera to setup when the spectator mode is enabled.\n */\n enableSpectatorMode(options) {\n if (!this._spectatorMode) {\n this._spectatorMode = true;\n this._switchSpectatorMode(options);\n }\n }\n /**\n * Disable spectator mode for desktop VR experiences.\n */\n disableSpecatatorMode() {\n if (this._spectatorMode) {\n this._spectatorMode = false;\n this._switchSpectatorMode();\n }\n }\n _switchSpectatorMode(options) {\n const fps = options?.fps ? options.fps : 1000.0;\n const refreshRate = (1.0 / fps) * 1000.0;\n const cameraIndex = options?.preferredCameraIndex ? options?.preferredCameraIndex : 0;\n const updateSpectatorCamera = () => {\n if (this._spectatorCamera) {\n const delta = this.sessionManager.currentTimestamp - this._lastTimestamp;\n if (delta >= refreshRate) {\n this._lastTimestamp = this.sessionManager.currentTimestamp;\n this._spectatorCamera.position.copyFrom(this.camera.rigCameras[cameraIndex].globalPosition);\n this._spectatorCamera.rotationQuaternion.copyFrom(this.camera.rigCameras[cameraIndex].absoluteRotation);\n }\n }\n };\n if (this._spectatorMode) {\n if (cameraIndex >= this.camera.rigCameras.length) {\n throw new Error(\"the preferred camera index is beyond the length of rig camera array.\");\n }\n const onStateChanged = () => {\n if (this.state === 2 /* WebXRState.IN_XR */) {\n this._spectatorCamera = new UniversalCamera(\"webxr-spectator\", Vector3.Zero(), this._scene);\n this._spectatorCamera.rotationQuaternion = new Quaternion();\n this._scene.activeCameras = [this.camera, this._spectatorCamera];\n this.sessionManager.onXRFrameObservable.add(updateSpectatorCamera);\n this._scene.onAfterRenderCameraObservable.add((camera) => {\n if (camera === this.camera) {\n // reset the dimensions object for correct resizing\n this._scene.getEngine().framebufferDimensionsObject = null;\n }\n });\n }\n else if (this.state === 1 /* WebXRState.EXITING_XR */) {\n this.sessionManager.onXRFrameObservable.removeCallback(updateSpectatorCamera);\n this._scene.activeCameras = null;\n }\n };\n this.onStateChangedObservable.add(onStateChanged);\n onStateChanged();\n }\n else {\n this.sessionManager.onXRFrameObservable.removeCallback(updateSpectatorCamera);\n this._scene.activeCameras = [this.camera];\n }\n }\n _nonXRToXRCamera() {\n this.camera.setTransformationFromNonVRCamera(this._nonVRCamera);\n this.onInitialXRPoseSetObservable.notifyObservers(this.camera);\n }\n _setState(val) {\n if (this.state === val) {\n return;\n }\n this.state = val;\n this.onStateChangedObservable.notifyObservers(this.state);\n 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