#include <Urho3D/XR/OpenXR.h>

Inheritance diagram for Urho3D::OpenXR:

Classes
struct	ExtensionFeatures

struct	TemporaryStorage
	Temporary storage for internal structures. More...

Public Member Functions
	OpenXR (Context *)

void	SetUserExtensions (const StringVector &extensions)
	Configure the user extensions. Should be called before InitializeSystem.

bool	InitializeSystem (RenderBackend backend)
	Initialize the OpenXR subsystem. Renderer backend is not yet initialized at this point.

const OpenXRTweaks &	GetTweaks () const

const StringVector	GetExtensions () const


bool	InitializeSession (const VRSessionParameters &params) override

void	ShutdownSession () override
	Shuts down the VR session.

bool	IsConnected () const override
	Returns whether the engine is connected to VR session.

bool	IsRunning () const override
	Returns whether the VR frame loop is running.

bool	IsVisible () const override
	Returns whether the VR session is presented to the user.

bool	IsFocused () const override
	Return whether the VR session accepts user input.

VRRuntime	GetRuntime () const override
	Return the classification of VR runtime being used,.

const char *	GetRuntimeName () const override
	Return a string name for the runtime, spaces are not allowed as this will be passed along to shaders.

void	TriggerHaptic (VRHand hand, float durationSeconds, float cyclesPerSec, float amplitude) override
	Activates a haptic for a given hand.

Matrix3x4	GetHandTransform (VRHand hand) const override
	Returns the transform for a given hand in head relative space.

Matrix3x4	GetHandAimTransform (VRHand hand) const override
	Transform matrix of the hand aim base position.

Ray	GetHandAimRay (VRHand hand) const override
	Returns the aiming ray for a given hand.

void	GetHandVelocity (VRHand hand, Vector3 linear, Vector3 angular) const override
	Return linear and/or angular velocity of a hand.

Matrix3x4	GetEyeLocalTransform (VREye eye) const override
	Return the head-relative eye transform.

Matrix4	GetProjection (VREye eye, float nearDist, float farDist) const override
	Return the projection matrix for an eye.

Matrix3x4	GetHeadTransform () const override
	Return the head transform in stage space (or local if no stage).

void	SetCurrentActionSet (SharedPtr< XRActionGroup > set) override

Public Member Functions inherited from Urho3D::VirtualReality
	VirtualReality (Context *context)

virtual void	ConnectToRig (const VRRigDesc &rig)
	Connects session to the rig.

bool	IsRoomScale () const
	Returns true if this VR configuration is running at room scale.

const VRRigDesc &	GetRig () const
	Returns currently connected rig.

float	GetIPDCorrection () const
	IPD correction factor in millimeters.

float	GetScaleCorrection () const
	Scale correction factor, premultiplied into all transforms.

void	SetIPDCorrection (float value)

void	SetScaleCorrection (float value)
	Scale correction can also be done on the VRRig node.

int	GetRecommendedMultiSample () const
	Returns recommended MSAA level.

int	GetMultiSample () const
	Returns the currently chosen MSAA level.

IntRect	GetLeftEyeRect () const
	Viewport rectangle for left eye, required for multipass single-RT.

IntRect	GetRightEyeRect () const
	Viewport rectangle for right eye, required for multipass single-RT.

XRBinding *	GetInputBinding (const ea::string &path) const
	Attempts to retrieve an input binding.

XRBinding *	GetInputBinding (const ea::string &path, VRHand hand) const
	Attempts to retrieve a hand specific input binding.

XRActionGroup *	GetCurrentActionSet () const
	Returns the currently bound action set, null if no action set.

virtual void	SetCurrentActionSet (const ea::string &setName)
	Sets the current action set by name.

ea::string	GetSystemName () const
	Returns the system name, ie. Windows Mixed Reality.

Public Member Functions inherited from Urho3D::Object
	Object (Context *context)
	Construct.

	~Object () override
	Destruct. Clean up self from event sender & receiver structures.

virtual StringHash	GetType () const =0

virtual const ea::string &	GetTypeName () const =0

virtual const TypeInfo *	GetTypeInfo () const =0
	Return type info.

virtual void	OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
	Handle event.

virtual void	SerializeInBlock (Archive &archive)
	Serialize content from/to archive. May throw ArchiveException.

bool	IsInstanceOf (StringHash type) const
	Check current instance is type of specified type.

bool	IsInstanceOf (const TypeInfo *typeInfo) const
	Check current instance is type of specified type.

template<typename T >
bool	IsInstanceOf () const
	Check current instance is type of specified class.

template<typename T >
T *	Cast ()
	Cast the object to specified most derived class.

template<typename T >
const T *	Cast () const
	Cast the object to specified most derived class.

void	SubscribeToEventManual (StringHash eventType, EventHandler *handler)
	Subscribe to an event that can be sent by any sender.

void	SubscribeToEventManual (Object sender, StringHash eventType, EventHandler handler)
	Subscribe to a specific sender's event.

template<class T >
void	SubscribeToEvent (StringHash eventType, T handler)
	Subscribe to an event that can be sent by any sender.

template<class T >
void	SubscribeToEvent (Object *sender, StringHash eventType, T handler)
	Subscribe to a specific sender's event.

void	UnsubscribeFromEvent (StringHash eventType)
	Unsubscribe from an event.

void	UnsubscribeFromEvent (Object *sender, StringHash eventType)
	Unsubscribe from a specific sender's event.

void	UnsubscribeFromEvents (Object *sender)
	Unsubscribe from a specific sender's events.

void	UnsubscribeFromAllEvents ()
	Unsubscribe from all events.

void	UnsubscribeFromAllEventsExcept (const ea::vector< StringHash > &exceptions)
	Unsubscribe from all events except those listed.

void	UnsubscribeFromAllEventsExcept (const ea::vector< Object * > &exceptions)
	Unsubscribe from all events except those with listed senders.

void	SendEvent (StringHash eventType)
	Send event to all subscribers.

void	SendEvent (StringHash eventType, VariantMap &eventData)
	Send event with parameters to all subscribers.

VariantMap &	GetEventDataMap () const
	Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.

template<typename... Args>
void	SendEvent (StringHash eventType, const Args &... args)
	Send event with variadic parameter pairs to all subscribers. The parameters are (paramID, paramValue) pairs.

Context *	GetContext () const
	Return execution context.

const Variant &	GetGlobalVar (StringHash key) const

const VariantMap &	GetGlobalVars () const

void	SetGlobalVar (StringHash key, const Variant &value)

Object *	GetSubsystem (StringHash type) const
	Return subsystem by type.

Object *	GetEventSender () const
	Return active event sender. Null outside event handling.

EventHandler *	GetEventHandler () const
	Return active event handler. Null outside event handling.

bool	HasSubscribedToEvent (StringHash eventType) const
	Return whether has subscribed to an event without specific sender.

bool	HasSubscribedToEvent (Object *sender, StringHash eventType) const
	Return whether has subscribed to a specific sender's event.

bool	HasEventHandlers () const
	Return whether has subscribed to any event.

template<class T >
T *	GetSubsystem () const
	Template version of returning a subsystem.

const ea::string &	GetCategory () const

void	SendEvent (StringHash eventType, const VariantMap &eventData)
	Send event with parameters to all subscribers.

void	SetBlockEvents (bool block)
	Block object from sending and receiving events.

bool	GetBlockEvents () const
	Return sending and receiving events blocking status.

Public Member Functions inherited from Urho3D::RefCounted
	RefCounted ()
	Construct. Allocate the reference count structure and set an initial self weak reference.

virtual	~RefCounted ()
	Destruct. Mark as expired and also delete the reference count structure if no outside weak references exist.

	RefCounted (const RefCounted &rhs)=delete
	Prevent copy construction.

RefCounted &	operator= (const RefCounted &rhs)=delete
	Prevent assignment.

int	AddRef ()

int	ReleaseRef ()

int	Refs () const

int	WeakRefs () const

RefCount *	RefCountPtr () const
	Return pointer to the reference count structure.

bool	HasScriptObject () const
	Return true if script runtime object wrapping this native object exists.

bool	IsScriptStrongRef () const
	Return true if script reference is strong.

Protected Member Functions
void	InitializeActiveExtensions (RenderBackend backend)

bool	InitializeTweaks (RenderBackend backend)

void	UpdateHands ()

void	UpdateControllerModels ()

void	UpdateControllerModel (VRHand hand, Node *instanceNode)

bool	OpenSession ()

void	BindActions (XMLFile *xmlFile)

void	UpdateBindingBound ()

void	PollEvents ()

bool	UpdateSessionState (XrSessionState state)

void	BeginFrame ()

void	AcquireSwapChainImages ()

void	LocateViewsAndSpaces ()

void	SynchronizeActions ()

void	ReleaseSwapChainImages ()

void	LinkImagesToFrameInfo (XrFrameEndInfo &endInfo)

void	EndFrame (XrFrameEndInfo &endInfo)

void	HandleBeginFrame ()

void	HandleEndRendering ()

Protected Member Functions inherited from Urho3D::VirtualReality
void	CreateDefaultRig ()

void	ValidateCurrentRig ()

void	UpdateCurrentRig ()

Protected Attributes
StringVector	supportedExtensions_

StringVector	userExtensions_

StringVector	activeExtensions_

struct Urho3D::OpenXR::ExtensionFeatures	features_

SharedPtr< XMLFile >	manifest_

XrInstancePtr	instance_

XrDebugUtilsMessengerEXTPtr	debugMessenger_

XrSystemId	system_ {}

OpenXRTweaks	tweaks_

XrSessionPtr	session_

XrSpacePtr	headSpace_

XrSpacePtr	viewSpace_

OpenXRSwapChainPtr	swapChain_

OpenXRSwapChainPtr	depthChain_

EnumArray< XrView, VREye >	views_ {{XR_TYPE_VIEW}}

EnumArray< SharedPtr< OpenXRControllerModel >, VRHand >	controllerModels_

XrSpaceLocation	headLocation_ {XR_TYPE_SPACE_LOCATION}
	Location tracking of the head.

XrSpaceVelocity	headVelocity_ {XR_TYPE_SPACE_VELOCITY}
	Velocity tracking information of the head.

XrEnvironmentBlendMode	blendMode_ {XR_ENVIRONMENT_BLEND_MODE_OPAQUE}

XrTime	predictedTime_ {}
	Predicted time for display of the next frame.

XrSessionState	sessionState_ {}
	Current session state.

EnumArray< SharedPtr< OpenXRBinding >, VRHand >	handGrips_
	Cached grip pose bindings to avoid constant queries.

EnumArray< SharedPtr< OpenXRBinding >, VRHand >	handAims_
	Cached aim pose bindings to avoid constant queries.

EnumArray< SharedPtr< OpenXRBinding >, VRHand >	handHaptics_
	Cached haptic outputs to avoid constant queries.

struct Urho3D::OpenXR::TemporaryStorage	temp_

Protected Attributes inherited from Urho3D::VirtualReality
ea::string	systemName_
	Name of the system being run, ie. Windows Mixed Reality.

int	recommendedMultiSample_ {1}
	MSAA level recommended by API.

IntVector2	recommendedEyeTextureSize_
	Texture size recommended by API.

int	multiSample_ {}
	Effective MSAA level to use.

IntVector2	eyeTextureSize_
	Effective texture size.

float	ipdCorrection_ = 0.0f
	External IPD adjustment.

float	scaleCorrection_ = 1.0f
	Scaling factor correct by.

bool	autoClearMasks_ = true

bool	isRoomScale_ = false
	Indicates we have room scale tracking.

SharedPtr< Scene >	defaultScene_
	Default scene for rendering.

SharedPtr< VRRig >	defaultRig_
	Default rig to use.

VRRigDesc	rig_
	Link to currently used rig.

SharedPtr< Texture2D >	currentBackBufferColor_
	Back buffer textures active in current frame.

SharedPtr< Texture2D >	currentBackBufferDepth_

SharedPtr< XRActionGroup >	activeActionSet_
	Currently bound action-set.

ea::map< ea::string, SharedPtr< XRActionGroup > >	actionSets_
	Table of action sets registered.

Protected Attributes inherited from Urho3D::Object
WeakPtr< Context >	context_
	Execution context.

Private Member Functions
	URHO3D_OBJECT (OpenXR, VirtualReality)

Additional Inherited Members
Static Public Member Functions inherited from Urho3D::Object
static const TypeInfo *	GetTypeInfoStatic ()
	Return type info static.

Detailed Description

Register as a subsystem, Initialize sometime after GFX has been initialized but before Audio is initialized ... otherwise it won't get the right audio target. Or reinit audio querying for the default device.

Currently setup around a VR experience. Minor changes will be required for additive / HoloLens. Mobile AR would be best done with another class that's pared down to the specifics that apply instead of trying to make this class into a monster.

Expectations for the VR-Rig:

Scene

"VRRig" NETWORKED, this is effectively the tracking volume center floor
- "Head" NETWORKED
  - "Left_Eye" LOCAL
    - Camera
  - "Right_Eye" LOCAL
    - Camera
- "Left_Hand" NETWORKED, will have enabled status set based on controller availability
  - StaticModel[0] = controller model
- "Right_Hand" NETWORKED, will have enabled status set based on controller availability
  - StaticModel[0] = controller model

To-Do:

Trackers
Multiple Action-Sets
Hand Skeleton

Member Function Documentation

◆ InitializeSession()

bool Urho3D::OpenXR::InitializeSession ( const VRSessionParameters & params )

overridevirtual

Implement VirtualReality.

Implements Urho3D::VirtualReality.

Member Data Documentation

◆ blendMode_

XrEnvironmentBlendMode Urho3D::OpenXR::blendMode_ {XR_ENVIRONMENT_BLEND_MODE_OPAQUE}

protected

Blending mode the compositor will be told to use. Assumed that when not opaque the correct mode will be be received from querying.

The documentation for this class was generated from the following files:

Urho3D/XR/OpenXR.h
Urho3D/XR/OpenXR.cpp

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ InitializeSession()

Member Data Documentation

◆ blendMode_