Engine API Reference - v1.77.0
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    Class XrViews

    Provides access to list of XrView's. And information about their capabilities, such as support and availability of view's camera color texture, depth texture and other parameters.

    Hierarchy (View Summary)

    Index

    Accessors

    availableColor availableDepth depthGpuOptimized depthPixelFormat list supportedColor supportedDepth

    Methods

    fire get hasEvent off on once

    Events

    EVENT_ADD EVENT_REMOVE

    Accessors

    • get availableColor(): boolean

      Check if Camera Color is available. This information becomes available only after session has started.

      Returns boolean

    • get availableDepth(): boolean

      Check if Camera Depth is available. This information becomes available only after session has started.

      Returns boolean

    • get list(): XrView[]

      An array of XrView's of this session. Views are not available straight away on session start, and can be added/removed mid-session. So use of add/remove events is required for accessing views.

      Returns XrView[]

    • get supportedColor(): boolean

      Check if Camera Color is supported. It might be still unavailable even if requested, based on hardware capabilities and granted permissions.

      Returns boolean

    • get supportedDepth(): boolean

      Check if Camera Depth is supported. It might be still unavailable even if requested, based on hardware capabilities and granted permissions.

      Returns boolean

    Methods

    • Fire an event, all additional arguments are passed on to the event listener.

      Parameters

      • name: string

        Name of event to fire.

      • Optionalarg1: any

        First argument that is passed to the event handler.

      • Optionalarg2: any

        Second argument that is passed to the event handler.

      • Optionalarg3: any

        Third argument that is passed to the event handler.

      • Optionalarg4: any

        Fourth argument that is passed to the event handler.

      • Optionalarg5: any

        Fifth argument that is passed to the event handler.

      • Optionalarg6: any

        Sixth argument that is passed to the event handler.

      • Optionalarg7: any

        Seventh argument that is passed to the event handler.

      • Optionalarg8: any

        Eighth argument that is passed to the event handler.

      Returns EventHandler

      Self for chaining.

      obj.fire('test', 'This is the message');

    • Get an XrView by its associated eye constant.

      Parameters

      • eye: string

        An XREYE_* view is associated with. Can be 'none' for monoscope views.

      Returns null | XrView

      View or null if view of such eye is not available.

    • Test if there are any handlers bound to an event name.

      Parameters

      • name: string

        The name of the event to test.

      Returns boolean

      True if the object has handlers bound to the specified event name.

      obj.on('test', function () { }); // bind an event to 'test'
      obj.hasEvent('test'); // returns true
      obj.hasEvent('hello'); // returns false

    • Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.

      Parameters

      • Optionalname: string

        Name of the event to unbind.

      • Optionalcallback: HandleEventCallback

        Function to be unbound.

      • Optionalscope: any

        Scope that was used as the this when the event is fired.

      Returns EventHandler

      Self for chaining.

      const handler = function () {
      };
      obj.on('test', handler);

      obj.off(); // Removes all events
      obj.off('test'); // Removes all events called 'test'
      obj.off('test', handler); // Removes all handler functions, called 'test'
      obj.off('test', handler, this); // Removes all handler functions, called 'test' with scope this

    • Attach an event handler to an event.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      Can be used for removing event in the future.

      obj.on('test', function (a, b) {
          console.log(a + b);
      });
      obj.fire('test', 1, 2); // prints 3 to the console

      const evt = obj.on('test', function (a, b) {
          console.log(a + b);
      });
      // some time later
      evt.off();

    • Attach an event handler to an event. This handler will be removed after being fired once.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      • can be used for removing event in the future.
      obj.once('test', function (a, b) {
          console.log(a + b);
      });
      obj.fire('test', 1, 2); // prints 3 to the console
      obj.fire('test', 1, 2); // not going to get handled

    Events

    EVENT_ADD: string = 'add'

    Fired when view has been added. Views are not available straight away on session start and are added mid-session. They can be added/removed mid session by underlyng system. The handler is passed the XrView that has been added.

    xr.views.on('add', (view) => {
        console.log('View added');
    });
    EVENT_REMOVE: string = 'remove'

    Fired when view has been removed. They can be added/removed mid session by underlyng system. The handler is passed the XrView that has been removed.

    xr.views.on('remove', (view) => {
        console.log('View removed');
    });

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