Turns an object into a trigger that is capable of detecting when other physics objects enter its volume. More...

#include <JoltTriggerComponent.h>

Inheritance diagram for plJoltTriggerComponent:

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Public Member Functions
virtual void	SerializeComponent (plWorldWriter &inout_stream) const override
	Override this to save the current state of the component to the given stream.

virtual void	DeserializeComponent (plWorldReader &inout_stream) override
	Override this to load the current state of the component from the given stream.

void	SetTriggerMessage (const char *szSz)
	Sets the text that the plMsgTriggerTriggered should contain when the trigger fires.

const char *	GetTriggerMessage () const

Public Member Functions inherited from plJoltActorComponent
void	SetInitialObjectFilterID (plUInt32 uiObjectFilterID)
	Sets the object filter ID to use. This can only be set right after creation, before the component gets activated.

plUInt32	GetObjectFilterID () const
	The object filter ID can be used to ignore collisions specifically with this one object.

plUInt32	GetJoltBodyID () const
	Returns the internal ID used by Jolt to identify this actor/body.

Public Member Functions inherited from plComponent
void	SetActiveFlag (bool bEnabled)
	Sets the active flag of the component, which affects its active state.

bool	GetActiveFlag () const
	Checks whether the 'active flag' is set on this component. Note that this does not mean that the component is also 'active'.

bool	IsActive () const
	Checks whether this component is in an active state.

bool	IsActiveAndInitialized () const
	Returns whether this component is active and initialized.

bool	IsActiveAndSimulating () const
	Whether the component is currently active and simulation has been started as well.

plComponentManagerBase *	GetOwningManager ()
	Returns the corresponding manager for this component.

const plComponentManagerBase *	GetOwningManager () const
	Returns the corresponding manager for this component.

plGameObject *	GetOwner ()
	Returns the owner game object if the component is attached to one or nullptr.

const plGameObject *	GetOwner () const
	Returns the owner game object if the component is attached to one or nullptr.

plWorld *	GetWorld ()
	Returns the corresponding world for this component.

const plWorld *	GetWorld () const
	Returns the corresponding world for this component.

plComponentHandle	GetHandle () const
	Returns a handle to this component.

plUInt32	GetUniqueID () const
	Returns the unique id for this component.

void	SetUniqueID (plUInt32 uiUniqueID)
	Sets the unique id for this component.

void	EnsureInitialized ()
	Ensures that the component is initialized. Must only be called from another component's Initialize callback.

void	EnsureSimulationStarted ()
	Ensures that the OnSimulationStarted method has been called. Must only be called from another component's OnSimulationStarted callback.

PL_ALWAYS_INLINE bool	SendMessage (plMessage &ref_msg)
	Sends a message to this component.

PL_ALWAYS_INLINE bool	SendMessage (plMessage &ref_msg) const

void	PostMessage (const plMessage &msg, plTime delay=plTime::MakeZero(), plObjectMsgQueueType::Enum queueType=plObjectMsgQueueType::NextFrame) const
	Queues the message for the given phase. The message is processed after the given delay in the corresponding phase.

virtual bool	HandlesMessage (const plMessage &msg) const
	Returns whether the given Message is handled by this component.

void	SetUserFlag (plUInt8 uiFlagIndex, bool bSet)
	Be careful to check which flags may already be in use by base classes.

bool	GetUserFlag (plUInt8 uiFlagIndex) const
	Retrieves a custom flag. Index must be between 0 and 7.

void	SetCreatedByPrefab ()
	Adds plObjectFlags::CreatedByPrefab to the component. See the flag for details.

bool	WasCreatedByPrefab () const
	Checks whether the plObjectFlags::CreatedByPrefab flag is set on this component.

Public Member Functions inherited from plReflectedClass
virtual const plRTTI *	GetDynamicRTTI () const

bool	IsInstanceOf (const plRTTI *pType) const
	Returns whether the type of this instance is of the given type or derived from it.

template<typename T >
PL_ALWAYS_INLINE bool	IsInstanceOf () const
	Returns whether the type of this instance is of the given type or derived from it.

Protected Member Functions
virtual void	OnSimulationStarted () override
	This method is called once for active components, at the start of the next world update, but only when the world is simulated.

virtual void	OnDeactivated () override
	This method is called when the component gets deactivated.

void	PostTriggerMessage (const plGameObjectHandle &hOtherObject, plTriggerState::Enum triggerState) const

Protected Member Functions inherited from plJoltActorComponent
const plJoltUserData *	GetUserData () const

void	ExtractSubShapeGeometry (const plGameObject *pObject, plMsgExtractGeometry &msg) const

plResult	CreateShape (JPH::BodyCreationSettings pSettings, float fDensity, const plJoltMaterial pMaterial)

virtual void	CreateShapes (plDynamicArray< plJoltSubShape > &out_Shapes, const plTransform &rootTransform, float fDensity, const plJoltMaterial *pMaterial)

Protected Member Functions inherited from plComponent
	plComponent ()
	Keep the constructor private or protected in derived classes, so it cannot be called manually.

bool	IsDynamic () const
	Returns whether this component is dynamic and thus can only be attached to dynamic game objects.

virtual plWorldModuleTypeId	GetTypeId () const =0

virtual plComponentMode::Enum	GetMode () const =0

virtual void	Initialize ()
	Can be overridden for basic initialization that depends on a valid hierarchy and position.

virtual void	Deinitialize ()
	This method is called before the component is destroyed. A derived type can override this method to do common de-initialization work.

virtual void	OnActivated ()
	This method is called when the component gets activated.

void	EnableUnhandledMessageHandler (bool enable)
	By default disabled. Enable to have OnUnhandledMessage() called for every unhandled message.

virtual bool	OnUnhandledMessage (plMessage &msg, bool bWasPostedMsg)
	When EnableUnhandledMessageHandler() was activated, this is called for all messages for which there is no dedicated message handler.

virtual bool	OnUnhandledMessage (plMessage &msg, bool bWasPostedMsg) const
	When EnableUnhandledMessageHandler() was activated, this is called for all messages for which there is no dedicated message handler.

bool	IsInitialized () const

bool	IsInitializing () const

bool	IsSimulationStarted () const

Protected Attributes
plHashedString	m_sTriggerMessage

plEventMessageSender< plMsgTriggerTriggered >	m_TriggerEventSender

Protected Attributes inherited from plJoltActorComponent
plUInt32	m_uiUserDataIndex = plInvalidIndex

plUInt32	m_uiJoltBodyID = plInvalidIndex

plUInt32	m_uiObjectFilterID = plInvalidIndex

Protected Attributes inherited from plComponent
const plRTTI *	m_pMessageDispatchType = nullptr
	Messages will be dispatched to this type. Default is what GetDynamicRTTI() returns, can be redirected if necessary.

Friends
class	plJoltWorldModule

class	plJoltContactListener

Additional Inherited Members
Static Public Member Functions inherited from plNoBase
static const plRTTI *	GetStaticRTTI ()

Public Attributes inherited from plJoltActorComponent
plUInt8	m_uiCollisionLayer = 0
	The collision layer determines with which other actors this actor collides.

Static Protected Member Functions inherited from plJoltActorComponent
static void	GatherShapes (plDynamicArray< plJoltSubShape > &shapes, plGameObject pObject, const plTransform &rootTransform, float fDensity, const plJoltMaterial pMaterial)

Detailed Description

Turns an object into a trigger that is capable of detecting when other physics objects enter its volume.

Triggers are physics actors and thus are set up the same way, e.g. they use physics shapes for their geometry, but they act very differently. Triggers do not affect other objects, instead all objects just pass through them. However, the trigger detects overlap with other objects and sends a message when a new object enters its volume or when one leaves it.

Note: The physics trigger only sends enter and leave messages. It does not send any message when an object stays inside the trigger.

The message plMsgTriggerTriggered is sent for every change. It references the object that entered or left the volume and it also contains a trigger-specific message string to identify what this should be used for.

Member Function Documentation

◆ DeserializeComponent()

void plJoltTriggerComponent::DeserializeComponent ( plWorldReader & inout_stream )

overridevirtual

Override this to load the current state of the component from the given stream.

The active state will be automatically serialized. The 'initialized' state is not serialized, all components will be initialized after creation, even if they were already in an initialized state when they were serialized.

Reimplemented from plJoltActorComponent.

◆ OnDeactivated()

void plJoltTriggerComponent::OnDeactivated ( )

overrideprotectedvirtual

This method is called when the component gets deactivated.

Upon destruction, a component that is active first gets deactivated. Therefore OnDeactivated() should be used for typical game code cleanup.

See also: OnActivated(), OnDeactivated(), Initialize(), Deinitialize(), OnSimulationStarted()

Reimplemented from plJoltActorComponent.

◆ OnSimulationStarted()

void plJoltTriggerComponent::OnSimulationStarted ( )

overrideprotectedvirtual

This method is called once for active components, at the start of the next world update, but only when the world is simulated.

This is the one preferred method to setup typical game logic. In a pure game environment there is no practical difference between OnActivated() and OnSimulationStarted(), as OnSimulationStarted() will be called right after OnActivated().

However, when a scene is open inside the editor, there is an important difference: OnActivated() is called once the component was created. OnSimulationStarted() is only called once the game simulation is started inside the editor. As an example, if a component starts a sound in OnActivated(), that sound will play right after the scene has been loaded into the editor. If instead the sound gets started in OnSimulationStarted(), it will only play once the user starts the game mode inside the editor.

Additionally, OnSimulationStarted() is only ever executed once on a component, even if the plWorld pauses and resumes world simulation multiple times. Thus components that should only execute a thing exactly once, will work correctly. In contrast OnActivated() and OnDeactivated() will be executed every time the component's active state is toggled, which could re-execute the same behavior multiple times.