// constants
// it comes from XRView eye property
XREYE_NONE = 'none' // monoscopic screens, e.g. mobile phones
XREYE_LEFT = 'left'
XREYE_RIGHT = 'right'

// pc.XrManager
xr.views // XrViews interface that provides an access to views and their capabilities
xr.start(camera, pc.XRTYPE_AR, pc.XRSPACE_LOCALFLOOR, {
    cameraColor: true // new option to request camera color information
});

// pc.XrViews
// this class provides an access to views, and their capabilities
views.supportedColor // true if color information is supported
views.availableColor // true if color information is available.
// This information is only available after XR session has started.
// It can be supported but not available due to lack of session features request, user permissions
// or underlying system capabilities
// Quest 3 - implements necessary features, but does not expose `camera-access` to users.
views.get(eye) // returns XrView or null based on XREYE_*
views.list // an array of XrView instances
views.on('add', (view) => { }); // event when new XrView is added
views.on('remove', (view) => { }); // event when XrView is removed

// pc.XrView
// this class represents a specific view with its data
view.eye // returns a string (constants XREYE_*). 'none' - means it is monoscopic display such as mobile phone screen
view.textureColor // returns a texture with color information. If color information is not available it will be null
view.viewport // Vec4 that represents a viewport are that this view is occupying of the screen