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
A browser-implementation specific string describing the browser.
version
A browser-implementation specific string describing the browser version.
providerURL
If provided, the URL to the entity that wrote this browser.
currentSpeed
The current speed of the avatar in m/s.
currentFrameRate
The current frame rate in frames per second.
description
A user-defined String which can be read and written.
supportedComponents
The property value cannot be changed, but the properties of the ComponentInfoArray can be.
supportedProfiles
The property value cannot be changed, but the properties of the ProfileInfoArray can be.
baseURL
A String value 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
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.
Methods
Promise<void> replaceWorld (X3DScene)
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.
Promise<X3DScene> createX3DFromString (String x3dSyntax)
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.
void createX3DFromURL (MFString url, Node node, String event)
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.
Promise<X3DScene> createX3DFromURL (MFString url)
Parse the passed URL into an X3D scene and return a Promise that resolves to an X3DScene object.
Promise<void> loadURL (MFString url [, MFString parameter])
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.
Promise<X3DScene> importDocument (DOMObject|String dom)
Imports an X3D XML DOM document or fragment, converts it, and returns a Promise that resolves to an X3DScene object.
Promise<X3DScene> importJS (Object|String json)
Imports an X3D JSON document or fragment, converts it, and returns a Promise that resolves to an X3DScene object.
String getBrowserProperty (String name)
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. |
String getBrowserOption (String name)
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 | false |
| Cache | Whether or not files should be cached. non standard | Boolean | true |
| 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 |
| Gravity | Default is gravity of Earth. non standard | Float | 9.80665 |
| 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 |
| 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 |
| Timings | Whether browser timings should be displayed. non standard | Boolean | false |
void setBrowserOption (String name, Object value)
Sets a browser option with the corresponding name to the given value.
String getRenderingProperty (String name)
Returns a rendering property with the corresponding name.
Rendering Properties
| Name | Type | Description |
|---|---|---|
| Shading | String | 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 |
| MaxSamples | Integer | The maximum number of samples supported for doing multisampling. non standard |
| Multisampling | Integer | Number of samples currently used by multisampling. non standard |
| LogarithmicDepthBuffer | Boolean | True or false if the logarithmic depth buffer is currently enabled or not. non standard |
void addBrowserCallback (Any key [, event], Function callback)
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 can be any value listed below:
- X3DConstants .CONNECTION_ERROR
- X3DConstants .BROWSER_EVENT
- X3DConstants .INITIALIZED_EVENT
- X3DConstants .SHUTDOWN_EVENT
- X3DConstants .INITIALIZED_ERROR
void removeBrowserCallback (Any key [, event])
Removes a browser callback function associated with key and event. If event is omitted, all callback associated whit key are removed.
void viewAll ([SFNode layerNode], [Number transitionTime = 1]) non standard
Modifies the current view to show the entire visible scene within transitionTime seconds. If layerNode is omitted, the active layer is used.
void nextViewpoint ([SFNode layerNode])
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.
void previousViewpoint ([SFNode layerNode])
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.
void firstViewpoint ([SFNode layerNode])
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.
void lastViewpoint ([SFNode layerNode])
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.
void changeViewpoint ([SFNode layerNode,] name String)
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.
void print (Object object)
Prints object 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.
void println (Object object)
Prints object 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.
VRML Methods
To be downward compatible with VRML, the following additional functions are available:
String getName ()
A browser-implementation specific string describing the browser.
String getVersion ()
A browser-implementation specific string describing the browser version.
Number getCurrentSpeed ()
The current speed of the avatar in m/s.
Number getCurrentFrameRate ()
The current frame rate in frames per second.
String getWorldURL ()
A string containing the URL of this execution context.
void replaceWorld (MFNode nodes)
Replace the current world with this new nodes that has been loaded or constructed from somewhere.
MFNode createVrmlFromString (String vrmlSyntax)
The string may be any valid VRML content.
void createVrmlFromURL (MFString url, SFNode node, String event)
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.
void addRoute (SFNode sourceNode, String sourceField, SFNode destinationNode, String destinationField)
Add a route from the passed sourceField to the passed destinationField.
void deleteRoute (SFNode sourceNode, String sourceField, SFNode destinationNode, String destinationField)
Remove the route between the passed sourceField and passed destinationField, if one exists.
void loadURL (MFString url [, MFString parameter])
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.
void setDescription (String description)
A user-defined String.