Urho3D::LogicComponent Class Reference

Helper base class for user-defined game logic components that hooks up to update events and forwards them to virtual functions similar to ScriptInstance class. More...

#include <Urho3D/Scene/LogicComponent.h>

Inheritance diagram for Urho3D::LogicComponent:

Public Member Functions
	LogicComponent (Context *context)
	Construct.
	~LogicComponent () override
	Destruct.
void	OnSetEnabled () override
	Handle enabled/disabled state change. Changes update event subscription.
virtual void	Start ()
	Called when the component is added to a scene node. Other components may not yet exist.
virtual void	DelayedStart ()
	Called before the first update. At this point all other components of the node should exist. Will also be called if update events are not wanted; in that case the event is immediately unsubscribed afterward.
virtual void	Stop ()
	Called when the component is detached from a scene node, usually on destruction. Note that you will no longer have access to the node and scene at that point.
virtual void	Update (float timeStep)
	Called on scene update, variable timestep.
virtual void	PostUpdate (float timeStep)
	Called on scene post-update, variable timestep.
virtual void	FixedUpdate (float timeStep)
	Called on physics update, fixed timestep.
virtual void	FixedPostUpdate (float timeStep)
	Called on physics post-update, fixed timestep.
virtual StringHash	GetUpdateEvent () const
virtual StringHash	GetPostUpdateEvent () const
	Return post update event type. Should stay the same for any given instance of the component.
void	SetUpdateEventMask (UpdateEventFlags mask)
	Set what update events should be subscribed to. Use this for optimization: by default all are in use. Note that this is not an attribute and is not saved or network-serialized, therefore it should always be called eg. in the subclass constructor.
UpdateEventFlags	GetUpdateEventMask () const
	Return what update events are subscribed to.
bool	IsDelayedStartCalled () const
	Return whether the DelayedStart() function has been called.
Public Member Functions inherited from Urho3D::Component
	Component (Context *context)
	Construct.
	~Component () override
	Destruct.
AttributeScopeHint	GetEffectiveScopeHint () const
bool	Save (Serializer &dest) const override
	Save as binary data. Return true if successful.
bool	SaveXML (XMLElement &dest) const override
	Save as XML data. Return true if successful.
bool	SaveJSON (JSONValue &dest) const override
	Save as JSON data. Return true if successful.
virtual void	GetDependencyNodes (ea::vector< Node * > &dest)
	Return the depended on nodes to order network updates.
virtual void	DrawDebugGeometry (DebugRenderer *debug, bool depthTest)
	Visualize the component as debug geometry.
virtual bool	HasAuxiliaryData () const
virtual void	SerializeAuxiliaryData (Archive &archive)
	Serialize auxiliary data from/to the current block of the archive. May throw ArchiveException.
void	SetEnabled (bool enable)
void	Remove ()
	Remove from the scene node. If no other shared pointer references exist, causes immediate deletion.
unsigned	GetID () const
Node *	GetNode () const
Scene *	GetScene () const
	Return the scene the node belongs to.
bool	IsEnabled () const
bool	IsEnabledEffective () const
ea::string	GetFullNameDebug () const
	Return full component name for debugging. Unique for each component in the scene. Slow!
Component *	GetComponent (StringHash type) const
	Return component in the same scene node by type. If there are several, returns the first.
template<class T >
T *	GetComponent () const
	Template version of returning a component in the same scene node by type.
unsigned	GetIndexInParent () const
	Return index of this component in the node.
Public Member Functions inherited from Urho3D::Serializable
	Serializable (Context *context)
	Construct.
	~Serializable () override
	Destruct.
virtual void	OnSetAttribute (const AttributeInfo &attr, const Variant &src)
	Handle attribute write access. Default implementation writes to the variable at offset, or invokes the set accessor.
virtual void	OnGetAttribute (const AttributeInfo &attr, Variant &dest) const
	Handle attribute read access. Default implementation reads the variable at offset, or invokes the get accessor.
virtual ObjectReflection *	GetReflection () const
	Return reflection used for serialization.
virtual const ea::vector< AttributeInfo > *	GetAttributes () const
	Return attribute descriptions, or null if none defined.
void	SerializeInBlock (Archive &archive) override
	Serialize content from/to archive. May throw ArchiveException.
void	SerializeInBlock (Archive &archive, bool serializeTemporary)
virtual bool	Load (Deserializer &source)
	Load from binary data. Return true if successful.
virtual bool	LoadXML (const XMLElement &source)
	Load from XML data. Return true if successful.
virtual bool	LoadJSON (const JSONValue &source)
	Load from JSON data. Return true if successful.
virtual bool	Load (const ea::string &resourceName)
	Load from binary resource.
virtual bool	LoadXML (const ea::string &resourceName)
	Load from XML resource.
virtual bool	LoadJSON (const ea::string &resourceName)
	Load from JSON resource.
virtual bool	LoadFile (const ea::string &resourceName)
	Load from resource of automatically detected type.
virtual void	ApplyAttributes ()
	Apply attribute changes that can not be applied immediately. Called after scene load or a network update.
virtual bool	SaveDefaultAttributes (const AttributeInfo &attr) const
	Return whether should save default-valued attributes into XML. Default false.
bool	SetAttribute (unsigned index, const Variant &value)
bool	SetAttribute (const ea::string &name, const Variant &value)
	Set attribute by name. Return true if successfully set.
void	SetInstanceDefault (bool enable)
	(Internal use) Set instance-level default flag.
void	SetInstanceDefault (const ea::string &name, const Variant &defaultValue)
	(Internal use) Set instance-level default value. Allocate the internal data structure as necessary.
virtual Variant	GetInstanceDefault (const ea::string &name) const
	(Internal use) Get instance-level default value.
void	ResetToDefault ()
	Reset all editable attributes to their default values.
void	RemoveInstanceDefault ()
	Remove instance's default values if they are set previously.
void	SetTemporary (bool enable)
Variant	GetAttribute (unsigned index) const
Variant	GetAttribute (const ea::string &name) const
	Return attribute value by name. Return empty if not found.
Variant	GetAttributeDefault (unsigned index) const
Variant	GetAttributeDefault (const ea::string &name) const
	Return attribute default value by name. Return empty if not found.
unsigned	GetNumAttributes () const
void	CopyAttributes (const Serializable *source, bool resetToDefault=true)
	Copy all attributes from another serializable.
SharedPtr< Serializable >	Clone (bool resetToDefault=true) const
	Clone this serializable.
bool	IsTemporary () const
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 bool	IsInstanceOf (StringHash type) const =0
	Check whether current instance implements specified type.
virtual void	OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
	Handle event.
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	OnNodeSet (Node *previousNode, Node *currentNode) override
	Handle scene node being assigned at creation.
void	OnSceneSet (Scene *previousScene, Scene *scene) override
	Handle scene being assigned.
Protected Member Functions inherited from Urho3D::Component
virtual void	OnMarkedDirty (Node *node)
	Handle scene node transform dirtied.
virtual void	OnNodeSetEnabled (Node *node)
	Handle scene node enabled status changing.
void	SetID (unsigned id)
void	SetNode (Node *node)
	Set scene node. Called by Node when creating the component.
Component *	GetFixedUpdateSource ()
	Return a component from the scene root that sends out fixed update events (either PhysicsWorld or PhysicsWorld2D). Return null if neither exists.
void	DoAutoRemove (AutoRemoveMode mode)
	Perform autoremove. Called by subclasses. Caller should keep a weak pointer to itself to check whether was actually removed, and return immediately without further member operations in that case.

Private Member Functions
	URHO3D_OBJECT (LogicComponent, Component)
void	UpdateEventSubscription ()
	Subscribe/unsubscribe to update events based on current enabled state and update event mask.
void	HandleSceneUpdate (StringHash eventType, VariantMap &eventData)
	Handle scene update event.
void	HandleScenePostUpdate (StringHash eventType, VariantMap &eventData)
	Handle scene post-update event.

Private Attributes
UpdateEventFlags	updateEventMask_
	Requested event subscription mask.
UpdateEventFlags	currentEventMask_
	Current event subscription mask.
bool	delayedStartCalled_
	Flag for delayed start.

Additional Inherited Members
Static Public Member Functions inherited from Urho3D::Object
static const TypeInfo *	GetTypeInfoStatic ()
	Return type info static.
Static Public Attributes inherited from Urho3D::Object
static constexpr ea::array< StringHash, 0 >	TypeHierarchy {}
Protected Attributes inherited from Urho3D::Component
Node *	node_
	Scene node.
unsigned	id_
	Unique ID within the scene.
bool	networkUpdate_
	Network update queued flag.
bool	enabled_
	Enabled flag.
Protected Attributes inherited from Urho3D::Serializable
ea::unique_ptr< VariantMap >	instanceDefaultValues_
	Attribute default value at each instance level.
bool	setInstanceDefault_
	When true, store the attribute value as instance's default value (internal use only).
bool	temporary_
	Temporary flag.
Protected Attributes inherited from Urho3D::Object
WeakPtr< Context >	context_
	Execution context.

Detailed Description

Helper base class for user-defined game logic components that hooks up to update events and forwards them to virtual functions similar to ScriptInstance class.

Member Function Documentation

DelayedStart()

virtual void Urho3D::LogicComponent::DelayedStart ( )

inlinevirtual

Called before the first update. At this point all other components of the node should exist. Will also be called if update events are not wanted; in that case the event is immediately unsubscribed afterward.

Reimplemented in Urho3D::TextRenderer3D.

FixedPostUpdate()

void Urho3D::LogicComponent::FixedPostUpdate ( float  timeStep )

virtual

Called on physics post-update, fixed timestep.

Reimplemented in Urho3D::RaycastVehicle.

FixedUpdate()

void Urho3D::LogicComponent::FixedUpdate ( float  timeStep )

virtual

Called on physics update, fixed timestep.

Reimplemented in Urho3D::RaycastVehicle.

GetPostUpdateEvent()

StringHash Urho3D::LogicComponent::GetPostUpdateEvent ( ) const

virtual

Return post update event type. Should stay the same for any given instance of the component.

Reimplemented in Urho3D::IKSolver.

GetUpdateEvent()

StringHash Urho3D::LogicComponent::GetUpdateEvent ( ) const

virtual

Return update event type. Should stay the same for any given instance of the component. DelayedStart is invoked before the first update event of this type.

OnNodeSet()

void Urho3D::LogicComponent::OnNodeSet ( Node *  previousNode, Node *  currentNode  )

overrideprotectedvirtual

Handle scene node being assigned at creation.

Reimplemented from Urho3D::Component.

Reimplemented in Urho3D::RaycastVehicle, Urho3D::RmlCanvasComponent, Urho3D::RmlUIComponent, and Urho3D::VRRig.

OnSceneSet()

void Urho3D::LogicComponent::OnSceneSet ( Scene *  previousScene, Scene *  scene  )

overrideprotectedvirtual

Handle scene being assigned.

Reimplemented from Urho3D::Component.

OnSetEnabled()

void Urho3D::LogicComponent::OnSetEnabled ( )

overridevirtual

Handle enabled/disabled state change. Changes update event subscription.

Reimplemented from Urho3D::Component.

Reimplemented in Urho3D::RaycastVehicle, Urho3D::RmlCanvasComponent, and Urho3D::RmlUIComponent.

PostUpdate()

void Urho3D::LogicComponent::PostUpdate ( float  timeStep )

virtual

Called on scene post-update, variable timestep.

Reimplemented in Urho3D::IKSolver, Urho3D::RaycastVehicle, and Urho3D::TextRenderer3D.

Update()

void Urho3D::LogicComponent::Update ( float  timeStep )

virtual

Called on scene update, variable timestep.

Reimplemented in Urho3D::RmlSerializableInspector, Urho3D::RmlUIComponent, and Urho3D::ShakeComponent.

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

• Urho3D/Scene/LogicComponent.h
• Urho3D/Scene/LogicComponent.cpp