ARVRInterface

Inherits: Reference < Object

Inherited By: ARVRInterfaceGDNative, MobileVRInterface, WebXRInterface

Base class for an AR/VR interface implementation.

Description

This class needs to be implemented to make an AR or VR platform available to Godot and these should be implemented as C++ modules or GDNative modules (note that for GDNative the subclass ARVRScriptInterface should be used). Part of the interface is exposed to GDScript so you can detect, enable and configure an AR or VR platform.

Interfaces should be written in such a way that simply enabling them will give us a working setup. You can query the available interfaces through ARVRServer.

Tutorials

Properties

bool

ar_is_anchor_detection_enabled

false

bool

interface_is_initialized

false

bool

interface_is_primary

false

Methods

int

get_camera_feed_id ( )

int

get_capabilities ( ) const

String

get_name ( ) const

Vector2

get_render_targetsize ( )

Tracking_status

get_tracking_status ( ) const

Transform

get_transform_for_eye ( Eyes eye, Transform transform )

bool

initialize ( )

bool

is_stereo ( )

void

uninitialize ( )

Enumerations

enum Capabilities:

Capabilities ARVR_NONE = 0

No ARVR capabilities.

Capabilities ARVR_MONO = 1

This interface can work with normal rendering output (non-HMD based AR).

Capabilities ARVR_STEREO = 2

This interface supports stereoscopic rendering.

Capabilities ARVR_AR = 4

This interface supports AR (video background and real world tracking).

Capabilities ARVR_EXTERNAL = 8

This interface outputs to an external device. If the main viewport is used, the on screen output is an unmodified buffer of either the left or right eye (stretched if the viewport size is not changed to the same aspect ratio of get_render_targetsize). Using a separate viewport node frees up the main viewport for other purposes.

enum Eyes:

Eyes EYE_MONO = 0

Mono output, this is mostly used internally when retrieving positioning information for our camera node or when stereo scopic rendering is not supported.

Eyes EYE_LEFT = 1

Left eye output, this is mostly used internally when rendering the image for the left eye and obtaining positioning and projection information.

Eyes EYE_RIGHT = 2

Right eye output, this is mostly used internally when rendering the image for the right eye and obtaining positioning and projection information.

enum Tracking_status:

Tracking_status ARVR_NORMAL_TRACKING = 0

Tracking is behaving as expected.

Tracking_status ARVR_EXCESSIVE_MOTION = 1

Tracking is hindered by excessive motion (the player is moving faster than tracking can keep up).

Tracking_status ARVR_INSUFFICIENT_FEATURES = 2

Tracking is hindered by insufficient features, it's too dark (for camera-based tracking), player is blocked, etc.

Tracking_status ARVR_UNKNOWN_TRACKING = 3

We don't know the status of the tracking or this interface does not provide feedback.

Tracking_status ARVR_NOT_TRACKING = 4

Tracking is not functional (camera not plugged in or obscured, lighthouses turned off, etc.).

Property Descriptions

bool ar_is_anchor_detection_enabled = false

  • void set_anchor_detection_is_enabled ( bool value )

  • bool get_anchor_detection_is_enabled ( )

On an AR interface, true if anchor detection is enabled.

bool interface_is_initialized = false

  • void set_is_initialized ( bool value )

  • bool is_initialized ( )

true if this interface been initialized.

bool interface_is_primary = false

  • void set_is_primary ( bool value )

  • bool is_primary ( )

true if this is the primary interface.

Method Descriptions

int get_camera_feed_id ( )

If this is an AR interface that requires displaying a camera feed as the background, this method returns the feed ID in the CameraServer for this interface.

int get_capabilities ( ) const

Returns a combination of Capabilities flags providing information about the capabilities of this interface.

String get_name ( ) const

Returns the name of this interface (OpenVR, OpenHMD, ARKit, etc).

Vector2 get_render_targetsize ( )

Returns the resolution at which we should render our intermediate results before things like lens distortion are applied by the VR platform.

Tracking_status get_tracking_status ( ) const

If supported, returns the status of our tracking. This will allow you to provide feedback to the user whether there are issues with positional tracking.

Transform get_transform_for_eye ( Eyes eye, Transform transform )

Returns the transform for an eye multiplied by transform. The usual value for transform is the global_transform of the current ARVROrigin.

bool initialize ( )

Call this to initialize this interface. The first interface that is initialized is identified as the primary interface and it will be used for rendering output.

After initializing the interface you want to use you then need to enable the AR/VR mode of a viewport and rendering should commence.

Note: You must enable the AR/VR mode on the main viewport for any device that uses the main output of Godot, such as for mobile VR.

If you do this for a platform that handles its own output (such as OpenVR) Godot will show just one eye without distortion on screen. Alternatively, you can add a separate viewport node to your scene and enable AR/VR on that viewport. It will be used to output to the HMD, leaving you free to do anything you like in the main window, such as using a separate camera as a spectator camera or rendering something completely different.

While currently not used, you can activate additional interfaces. You may wish to do this if you want to track controllers from other platforms. However, at this point in time only one interface can render to an HMD.

bool is_stereo ( )

Returns true if the current output of this interface is in stereo.

void uninitialize ( )

Turns the interface off.