Browser Services
Browser Object
This section lists the methods available in the browser object, which allows scripts to get and set browser information.
Instance Creation Method(s)
None. This object cannot be instantiated by the user. One global instance of the object is available. The name of the instance is Browser.
Properties
name: string
A browser-implementation specific string describing the browser. This property is read only.
version: string
A browser-implementation specific string describing the browser version. This property is read only.
providerURL: string
If provided, the URL to the entity that wrote this browser. This property is read only.
currentSpeed: number
The current speed of the avatar in m/s. This property is read only.
currentFrameRate: number
The current frame rate in frames per second. This property is read only.
description: string
A user-defined String which can be read and written.
supportedProfiles: ProfileInfoArray
Returns the list of all profiles that are supported by this browser. This property is read only.
supportedComponents: ComponentInfoArray
Returns a list of all components that are supported by this browser. This property is read only.
concreteNodes: ConcreteNodesArray
Returns a list of all concrete node classes that are supported by this browser. This property is read only.
abstractNodes: AbstractNodesArray
Returns a list of all abstract node classes that are supported by this browser. This property is read only.
baseURL: string
A String value which can be read and written, containing the URL against which relative URLs are resolved. By default, this is the address of the web page itself. Although this feature is rarely needed, it can be useful when loading a data: or blob: URL with Browser.loadURL, or when using Browser.createX3DFromString. The value of baseURL will only be used with the external browser.
currentScene: X3DScene | X3DExecutionContext
The real type of this class is dependent on whether the user code is inside a prototype instance or not. If the user code is inside a prototype instance the property represent an X3DExecutionContext otherwise it represent an X3DScene. This property is read only.
activeLayer: SFNode | null
Returns the active layer, if any. The active layer is the layer on which navigation takes place. This property is read only.
activeNavigationInfo: SFNode | null
Returns the bound NavigationInfo node in the active layer, if any. This property is read only.
activeViewpoint: SFNode | null
Returns the bound X3DViewpointNode in the active layer, if any. This property is read only.
contextMenu: ContextMenu
Returns a reference to the corresponding ContextMenu. This property is read only.
element: X3DCanvasElement
Returns a reference to the corresponding X3DCanvasElement. This property is read only.
Methods
getSupportedProfile (name: string): ProfileInfo
The getSupportedProfile service returns a ProfileInfo object of the named profile from the supportedProfiles array. The parameter is the name of a profile from which to fetch the declaration. The browser only returns a ProfileInfo object if it supports the named profile. If it does not support the named profile, an error is thrown.
getSupportedComponent (name: string): ComponentInfo
The getSupportedComponent service returns a ComponentInfo object of the named component from the supportedComponents array. The parameter is the name of a component from which to fetch the declaration. The browser only returns a ComponentInfo object if it supports the named component. If it does not support the component, an error is thrown.
getProfile (name: string): ProfileInfo
The getProfile service returns a ProfileInfo object of the named profile. The parameter is the name of a profile from which to fetch the declaration. The browser only returns a ProfileInfo object if it supports the named profile. If it does not support the named profile, an error is thrown.
getComponent (name: string, level?: number): ComponentInfo
The getComponent service returns a ComponentInfo object of the named component. The first parameter is the name of a component and the second the level from which to fetch the declaration. The browser only return a ComponentInfo object if it supports the named component and the requested level. If it does not support the component at the level desired, an error is thrown. If level is omitted, it defaults to the highest supported level of this component.
createScene (profile: ProfileInfo, … components: ComponentInfo []): Promise<X3DScene>
The createScene service creates a new empty scene that conforms to the given profile and component declarations. The Promise resolves when all components are loaded.
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const profile = browser .getProfile ("Interactive");
const components = [browser .getComponent ("..."), browser .getComponent ("...")];
const scene = await browser .createScene (profile, ... components);
replaceWorld (scene: X3DScene): Promise<void>
Replace the current world with this new scene that has been loaded or constructed from somewhere. A Promise is returned that will be resolved when the scene is completely loaded.
createX3DFromString (x3dSyntax: string): Promise<X3DScene>
The string may be any valid X3D content in any language supported by the browser implementation. If the browser does not support the content encoding the appropriate exception will be thrown.
createX3DFromURL (url: MFString, node: SFNode, event: string): void
Parse the passed URL into an X3D scene. When complete send the passed event to the passed node. The event is a string with the name of an MFNode inputOnly field of the passed node.
createX3DFromURL (url: MFString): Promise<X3DScene>
Parse the passed URL into an X3D scene and return a Promise that resolves to an X3DScene object.
loadURL (url: MFString, parameter?: MFString): Promise<void>
Load the passed URL, using the passed parameter string to possibly redirect it to another frame. If the destination is the frame containing the current scene, this method may never return. The return value is a Promise object, that is resolved when the new scene is loaded.
importDocument (dom: HTMLElement | string): Promise<X3DScene>
Imports an X3D XML DOM document or fragment, converts it, and returns a Promise that resolves to an X3DScene object.
importJS (json: JSONObject | string): Promise<X3DScene>
Imports an X3D JSON document or fragment, converts it, and returns a Promise that resolves to an X3DScene object.
getBrowserProperty (name: string): boolean
Returns a browser property with the corresponding name.
Browser Properties
| Name | Type | Description |
|---|---|---|
| ABSTRACT_NODES | Boolean | The browser implementation supports the ability to describe each node type with interfaces that correspond to the abstract node types as defined in ISO/IEC 19775-1 in addition to the basic requirement to support the X3DBaseNode abstract type. This indicates that the browser supports at least Conformance Level 2. |
| CONCRETE_NODES | Boolean | The browser implementation supports the ability to describe each node type with interfaces that correspond to the concrete node types as defined in ISO/IEC 19775-1 in addition to the requirement to support all of the abstract types. This indicates that the browser supports at least Conformance Level 3. |
| EXTERNAL_INTERACTIONS | Boolean | This browser supports the additional services required by external interfaces. A browser provided to user code in internal interactions does not set this property. |
| PROTOTYPE_CREATE | Boolean | The browser implementation supports the ability to dynamically create PROTO and EXTERNPROTO representations through service requests. The basic service capability only allows the ability to create instances of predefined PROTO structures read from a file format. |
| DOM_IMPORT | Boolean | The browser implementation supports the importDocument service request. |
| XML_ENCODING | Boolean | The browser supports XML as a file format encoding. |
| CLASSIC_VRML_ENCODING | Boolean | The browser supports the Classic VRML encoding. |
| BINARY_ENCODING | Boolean | The browser supports the binary file format encoding. |
getBrowserOption (name: string): any
Returns a browser option with the corresponding name.
Browser Options
| Name | Description | Type / valid range | Default |
|---|---|---|---|
| Antialiased | Render using hardware antialiasing if available. | Boolean | false |
| Dashboard | Display browser navigation user interface. | Boolean | true |
| Rubberband | Display a rubberband line when walk or fly. | Boolean | true |
| EnableInlineViewpoints | Viewpoints from Inline nodes are included in list of viewpoints if made available by the Inline node. | Boolean | true |
| MotionBlur | Render animations with motion blur. | Boolean | false |
| PrimitiveQuality | Render quality (tesselation level) for Box, Cone, Cylinder, Sphere. | LOW, MEDIUM, HIGH | MEDIUM |
| QualityWhenMoving | Render quality while camera is moving. | LOW, MEDIUM, HIGH, SAME (as while stationary) | SAME |
| Shading | Specify shading mode for all objects. | POINT, WIREFRAME, FLAT, GOURAUD, PHONG | GOURAUD |
| SplashScreen | Display browser splash screen on startup. | Boolean | true |
| TextureQuality | Quality of texture map display. | LOW, MEDIUM, HIGH | MEDIUM |
| AutoUpdate | Whether the update control of the browser should be done automatically or not. non-standard | Boolean | true |
| Cache | Whether or not files should be cached. non-standard | Boolean | true |
| ColorSpace | The color space in which color calculations take place. non-standard | SRGB, LINEAR_WHEN_PHYSICAL_MATERIAL, LINEAR | LINEAR_WHEN_PHYSICAL_MATERIAL |
| ContentScale | Factor with which the internal canvas size should be scaled. If set to -1, window.devicePixelRatio is used. non-standard | Float | 1 |
| ContextMenu | Whether or not the context menu can be displayed. non-standard | Boolean | true |
| Debug | Whether or not debug message should be printed into the console. non-standard | Boolean | false |
| Exposure | The exposure of an image describes the amount of light that is captured. non-standard | Float | 1 |
| Gravity | Default is gravity of Earth. non-standard | Float | 9.80665 |
| LoadUrlObjects | Wether X3DUrlObject should be loaded. non-standard | Boolean | true |
| LogarithmicDepthBuffer | Whether to use a logarithmic depth buffer. It may be necessary to use this if dealing with huge differences in scale in a single scene. It is automatically enabled if a GeoViewpoint is bound. non-standard | Boolean | false |
| Multisampling | Number of samples used for multisampling. non-standard | Integer | 4 |
| Mute | Whether to mute all audio. non-standard | Boolean | false |
| Notifications | Whether or not notifications should be displayed. non-standard | Boolean | true |
| OrderIndependentTransparency | Whether to use order independent transparency rendering technique. non-standard | Boolean | false |
| StraightenHorizon | Whether the Examine Viewer should straighten the horizon when navigating. non-standard | Boolean | true |
| TextCompression | Controls how Text.length and Text.maxExtent are handled. Either by adjusting char spacing or by scaling text letters. non-standard | CHAR_SPACING, SCALING | CHAR_SPACING |
| Timings | Whether browser timings should be displayed. non-standard | Boolean | false |
| ToneMapping | Whether tone mapping should be applied. non-standard | NONE, ACES_NARKOWICZ, ACES_HILL, ACES_HILL_EXPOSURE_BOOST, KHR_PBR_NEUTRAL | KHR_PBR_NEUTRAL |
| XRSessionMode | A String defining the XR session mode. If the value is NONE, no XR button is displayed and all attempts to start a session are ignored. See also XRSystem.requestSession. non-standard | NONE, IMMERSIVE_AR, IMMERSIVE_VR | IMMERSIVE_VR |
setBrowserOption (name: string, value: any): void
Sets a browser option with the corresponding name to the given value.
getRenderingProperty (name: string): any
Returns a rendering property with the corresponding name.
Rendering Properties
| Name | Type | Description |
|---|---|---|
| Shading | POINT, WIREFRAME, FLAT, GOURAUD, PHONG | The type of shading algorithm in use. Typical values are Flat, Gouraud, Phong, Wireframe, Point. |
| MaxTextureSize | Integer | The maximum texture size supported. |
| TextureUnits | Integer | The number of texture units supported for doing multitexture. |
| MaxLights | Integer | The maximum number of lights supported. |
| Antialiased | Boolean | True or false if the rendering is currently anti-aliased or not. |
| ColorDepth | Integer | The number of bits of color depth supported by the screen. Allows for optimized selection of textures, particularly for lower color depth screen capabilities. |
| TextureMemory | Float | The amount of memory in megabytes available for textures to be placed on the video card. |
| ContentScale | Boolean | Currently used factor to scale content. non-standard |
| LogarithmicDepthBuffer | Boolean | True or false if the logarithmic depth buffer is currently enabled or not. non-standard |
| MaxAnisotropicDegree | Float | The maximum number of available anisotropy. non-standard |
| MaxSamples | Integer | The maximum number of samples supported for doing multisampling. non-standard |
| Multisampling | Integer | Number of samples currently used by multisampling. non-standard |
| PixelsPerPoint | Float | Number of pixels per point. non-standard |
| XRSession | Boolean | True if a WebXR session is active, otherwise false. non-standard |
addBrowserCallback (key: any, [event?: number,] callback: (event: number) => void): void
Adds a browser callback function associated with key, where key can be of any type. The callback function is called when a browser event has been occurred. If event is omitted, the callback function is added to all events. The signature of the callback function is function (event), where event is one of the Browser Event Constants defined in the X3DConstants object:
| Event | Description |
|---|---|
| X3DConstants .CONNECTION_ERROR | Fired when scene could not be loaded. |
| X3DConstants .BROWSER_EVENT | not used |
| X3DConstants .INITIALIZED_EVENT | Fired after scene is loaded. |
| X3DConstants .SHUTDOWN_EVENT | Fired before scene is unloaded. |
| X3DConstants .INITIALIZED_ERROR | not used |
removeBrowserCallback (key: any, event?: number): void
Removes a browser callback function associated with key and event. If event is omitted, all callbacks associated with key will be removed.
viewAll ([layer?: SFNode,] transitionTime?: number = 1): void non-standard
Modifies the current view to show the entire visible scene within transitionTime seconds. If layerNode is omitted, the active layer is used.
nextViewpoint (layerNode?: SFNode): void
Changes the bound viewpoint node to the next viewpoint in the list of user viewpoints of layerNode. If layerNode is omitted, the active layer is used.
previousViewpoint (layerNode?: SFNode): void
Changes the bound viewpoint node to the previous viewpoint in the list of user viewpoints of layerNode. If layerNode is omitted, the active layer is used.
firstViewpoint (layerNode?: SFNode): void
Changes the bound viewpoint node to the first viewpoint in the list of user viewpoints of layerNode. If layerNode is omitted, the active layer is used.
lastViewpoint(layerNode?: SFNode): void
Changes the bound viewpoint node to the last viewpoint in the list of user viewpoints of layerNode. If layerNode is omitted, the active layer is used.
changeViewpoint ([layerNode: SFNode,] name: string): void
Changes the bound viewpoint node to the viewpoint named name. The viewpoint must be available in layerNode. If layerNode is omitted, the active layer is used.
beginUpdate (): void
Start processing events.
endUpdate (): void
Stop processing events.
print (… args: any []): void
Prints objects to the browser’s console without a newline character. Successive calls to this function append the descriptions on the same line. The output is the implicit call to the object’s toString () function.
println (… args: any []): void
Prints objects to the browser’s console, inserting a newline character after the output. Successive calls to this function will result in each output presented on separate lines. The output is the implicit call to the object’s toString () function.
dispose (): void
Disposes this X3DBrowser. The object can then no longer be used.
VRML Methods
To be downward compatible with VRML, the following additional functions are available:
getName (): string
A browser-implementation specific string describing the browser.
getVersion (): string
A browser-implementation specific string describing the browser version.
getCurrentSpeed (): number
The current speed of the avatar in m/s.
getCurrentFrameRate (): number
The current frame rate in frames per second.
getWorldURL (): string
A string containing the URL of this execution context.
replaceWorld (nodes: MFNode): void
Replace the current world with this new nodes that has been loaded or constructed from somewhere.
createVrmlFromString (vrmlSyntax: string): MFNode
The string may be any valid VRML content.
createVrmlFromURL (url: MFString, node: SFNode, event: string): void
Parse the passed URL into an VRML scene. When complete send the passed event to the passed node. The event is a string with the name of an MFNode inputOnly field of the passed node.
addRoute (sourceNode: SFNode, sourceField: string, destinationNode: SFNode, destinationField: string): void
Add a route from the passed sourceField to the passed destinationField.
deleteRoute (sourceNode: SFNode, sourceField: string, destinationNode: SFNode, destinationField: string): void
Remove the route between the passed sourceField and passed destinationField, if one exists.
loadURL (url: MFString, parameter?: MFString): void
Load the passed URL, using the passed parameter string to possibly redirect it to another frame. If the destination is the frame containing the current scene, this method may never return.
setDescription (description: string): void
A user-defined String.
X3DConcreteNode
The X3DConcreteNode interface defines an interface for concrete node types, it extends the X3DAbstractNode interface. The object consists solely of read-only properties. It does not define any additional functions.
Instance Creation Method(s)
None. This object cannot be instantiated by the user.
Static Properties
containerField: string
The default container field name for this node. This property is read only.
specificationRange: { from: string, to: string }
Returns an object with two strings defining the first version and last version where this node is specified. This property is read only.
fieldDefinitions: FieldDefinitionArray
Returns a list of fields defined for the SFNode object.
X3DAbstractNode
The X3DAbstractNode interface defines an interface for concrete node types. The object consists solely of read-only properties. It does not define any additional functions.
Instance Creation Method(s)
None. This object cannot be instantiated by the user.
Static Properties
typeName: string
The node type name for this class. This property is read only.
componentInfo: { name: string, level: number }
Returns an object with two properties name and level which can be used to get a ComponentInfo object from the X3D browser. This property is read only.
ConcreteNodesArray
ConcreteNodesArray is an object that represents an array of classes derived from X3DNode. This is a read-only object. Individual elements of the array can be referenced using the standard C-style dereferencing operator (e.g. concreteNodesArrayName[index], where index is an integer-valued expression with 0<=index<length and length is the number of elements in the array).
Instance Creation Method(s)
None. This object cannot be instantiated by the user.
Properties
length: number
An integer containing the number of elements in the array. This property is read only.
Methods
None
AbstractNodesArray
AbstractNodesArray is an object that represents an array of classes derived from X3DNode. This is a read-only object. Individual elements of the array can be referenced using the standard C-style dereferencing operator (e.g. abstractNodesArrayName[index], where index is an integer-valued expression with 0<=index<length and length is the number of elements in the array).
Instance Creation Method(s)
None. This object cannot be instantiated by the user.
Properties
length: number
An integer containing the number of elements in the array. This property is read only.
Methods
None