Static method for initializing the viewer runtime. Models must be loaded after this step is completed.

Includes:

• End points of cloud services the viewer uses, like Model Derivative
• Authentication and authorization cookie settings on the client side
• Misc runtime environment variables and global viewer configurations parameters

 var options = {
   env: "AutodeskProduction",
   language: "en",
   getAccessToken: function(onSuccess) {
       // TODO: Get actual APS token and expiration time.
       var accessToken = 'your_access_token';
       var expirationTimeSeconds = 5 * 60; // 5 minutes
       onSuccess(accessToken, expirationTimeSeconds);
   }
};
var myCallback = function() {
   console.log("initialization complete, creating the viewer...");
};
Autodesk.Viewing.Initializer(options, myCallback);

Counterpart to Autodesk.Viewing.Initializer, use it to free up memory. Developers need to uninitialize all Autodesk.Viewing.Viewer3D instances before invoking this function.

Returns the query parameter value from window url

Parameter from url

Convert to url-safe base 64 string

Decode base64 string

Default settings of the viewer. For more information about each setting, please reference the Settings.

List of available screen modes:

• kNormal: 0
• kFullBrowser: 1
• kFullScreen: 2

Viewer tools sets.

These constants are used to define the standard set of tools.

Fired when the ESC key is pressed.

Fired repeatedly throughout the process of opening a model/drawing.

Fired when the screen mode changes.

Fired then the navigation tool changes.

Fired when the viewer state is restored.

Fired when the viewer size changes.

Fired when the viewer is fully initialized.

Fired when the viewer is fully uninitialized.

Fired when the viewer begins loading a model, before the Model instance gets created.

Fired when an error is detected during a load.

Fired when a loader thinks its time to repaint the model while loading

Fired when the viewer receives and parses the initial model manifest.

Fired when the model/drawing finishes loading.

Fired when the model/drawing textures finish loading.

Fired when the instance tree is successfully created.

Fired when there’s an error while parsing the instance tree.

Fired when there’s a progress event during propertyDB loading.

Fired when a model is removed from the viewer. Note that this event fires after destructor. If you need to access the model, e.g. via model.getData(), use BEFORE_MODEL_UNLOADED instead.

Fired if a model unload is about to happen, but the model is still fully available.

Fired when a model is added to model queue so as to be visible.

Fired when a model is removed from model queue, i.e. changed to invisible.

Fired when the layers of the model are successfully loaded.

Fired a when model transform matrix has been changed. This usually happens if either placement or globalOffset has changed for a model.

Fired before a viewer extension is loaded.

Fired when a viewer extension is successfully loaded.

Fired before a viewer extension is unloaded.

Fired when a viewer extension is successfully unloaded.

Fired before a viewer extension is activated.

Fired after a viewer extension is activated.

Fired before a viewer extension is deactivated.

Fired after a viewer extension is deactivated.

Fired when the list of selected objects changes.

Fired when the list of selected objects changes in a multi-model context.

Fired when the viewer isolates a set of objects (i.e., makes everything else invisible or ghosted).

Fired when the list of isolated objects changes in a multi-model context.

Fired when the viewer hides a set of objects.

Fired when the list of hidden objects changes in a multi-model context.

Fired when the viewer shows a set of objects.

Fired to show the properties of the object.

Fired whenever viewer.showAll() is used.

Fired whenever viewer.hideAll() is used.

Fired when a camera changes.

Fired whenever the Explode tool is used.

Fired when a fitToView operation is applied.

Fired when fitToView operation is applied, supports multi-model contexts.

Fired when the cutting planes change.

Fired when a tool is activated or deactivated.

Fired when rendering options change.

Fired when the render frame shown by the Viewer is final or complete (it has no more pending geometry or post processing effects which delay incoming frames), or when the Viewer stops showing final frames. The name refers to when the state changes from busy to idle for the renderer, or vice versa. To know when all geometry is fully displayed, also check for GEOMETRY_LOADED_EVENT.

Fired when the render has presented to the screen.

Fired when visibility of a 2D layer changes.

Fired when a user preference property changes.

Fired when a user preference property is reset.

Fired as a result of invoking viewer.restoreDefaultSettings() to restore default settings. Will get fired after all other Autodesk.Viewing.PREF_CHANGED_EVENT get fired.

Fired when animations are successfully initialized.

Fired whenever a camera transition is finished, such as Focus, Go to Home View, Restore State, restore Named Views, and others.

Fired when user clicks on a hyperlink embedded in the model.

Fired when something in the view changes that may expose missing geometry.

Fired when the drawing buffer associated with a WebGLRenderingContext object has been lost

Fired when the WebGLRenderingContext was restored

Fired when a leaflet screenshot needs to be canceled before downloading all required / pending tiles.

Fired after a successful call into {Autodesk.Viewing.Viewer3D#setView}.

Fired when the first pixel of the model is ready to be rendered.

Fired when new geometry has been added to the scene

Fired when a new material has been added to the scene

Fired when a profile is added to the viewer.profileManager

Fired when a scene part is about to be rendered

Fired when object under mouse changed.

Fired when AnimController calls Autodesk.Viewing.Private.fadeValue

Fired when transition started

Fired when transition ended

Fired when fragments are loaded after the initial model load.

Fired when fragments are unloaded.

Fired when scene is updated

Fired when the viewer triggers a refresh of the custom properties/attributes from PropertyDb.

Event for new custom properties/attributes value from PropertyDb.

Fired when the viewers visibility has changed (i.e. a viewer window got shown or hidden).

NOTE: This event relies on the checkVisibility method being available on DOM elements in the browser. If this feature is missing, the event will not be fired. This should be the case in all up-to-date browsers. Most browsers have added it in 2022, but Safari only at the beginning of 2024.

Fired after the toolbar UI gets instantiated.

Fired after the Settings panel gets instantiated.

Fired after the ViewCube gets instantiated.