USMPreviewObject

Module: SMPreviewEditor

#include <SMPreviewObject.h>

Inherits from UObject

Description

class USMPreviewObject;

Single object per blueprint to manage simulation data.

Public Functions

	Name
	USMPreviewObject()
virtual	~USMPreviewObject() override
virtual void	Serialize(FArchive & Ar) override
virtual void	PostEditChangeChainProperty(FPropertyChangedChainEvent & PropertyChangedEvent) override
virtual void	PostEditUndo() override
virtual bool	IsEditorOnly() const override
	DECLARE_MULTICAST_DELEGATE_OneParam(FOnPreviewObjectChanged , USMPreviewObject * )
	DECLARE_MULTICAST_DELEGATE_OneParam(FOnPreviewWorldChanged , UWorld * )
USMInstance *	InitializeStateMachine(UObject * InContext)
void	ShutdownStateMachine()
void	SetFromBlueprint(UBlueprint * Blueprint)
ASMPreviewStateMachineActor *	GetPreviewStateMachineActor() const
void	SetPreviewWorld(UWorld * InWorld, const bool bModify =false)
void	SetCurrentWorld(UWorld * InWorld)
void	UpdateGameMode()
void	SpawnAllActors()
void	DestroyAllActors()
void	RefreshPreviewWorldActors()
bool	ContainsActor(AActor * CompareActor) const
void	SaveAllActorReferences()
void	RestoreAllActorReferences()
bool	IsSimulationRunning() const
UWorld *	GetPreviewWorld() const
UWorld *	GetCurrentWorld() const
USMInstance *	GetStateMachineTemplate() const
void	SetSimulatedStateMachineInstance(USMInstance * InInstance)
USMInstance *	GetSimulatedStateMachineInstance() const
TSubclassOf< AGameModeBase >	GetGameMode() const
bool	ShouldPossessPawnContext() const
void	SetContextActor(AActor * InActor)
AActor *	GetContextActor() const
void	AddPreviewActor(FSMPreviewObjectSpawner & NewPreviewObject)
void	RemovePreviewActor(AActor * ActorToRemove)
void	NotifySimulationStarted()
void	NotifySimulationEnded()
void	BindActorDelegates()
void	ReleaseActorHandles()

Protected Functions

	Name
void	OnWorldDestroyed(UWorld * World)
void	GetAllActorReferences(UObject * InObject, TMap< FName, FName > & PropertyNameValue) const
void	RestoreActorReferences(UObject * InObject, ULevel * InLevel, const TMap< FName, FName > & PropertyNameValue)
void	SpawnActorForWorld(FSMPreviewObjectSpawner & InOutSpawner)
AActor *	SpawnActorForWorld(UWorld * InWorld, UClass * ActorClass, AActor * ActorTemplate, const FTransform & Transform)
void	DestroyActor(AActor * Actor)
FSMPreviewObjectSpawner *	GetPreviewSpawnerFromActor(AActor * Actor)
void	BuildActorMap()

Public Attributes

	Name
FOnPreviewObjectChanged	OnPreviewObjectChangedEvent
FOnPreviewObjectChanged	OnWorldRefreshRequiredEvent
FOnPreviewObjectChanged	OnSimulationStartedEvent
FOnPreviewObjectChanged	OnSimulationEndedEvent
FOnPreviewWorldChanged	OnCurrentWorldChangedEvent

Public Functions Documentation

function USMPreviewObject

USMPreviewObject()

---

function ~USMPreviewObject

virtual ~USMPreviewObject() override

---

function Serialize

virtual void Serialize(
    FArchive & Ar
) override

---

function PostEditChangeChainProperty

virtual void PostEditChangeChainProperty(
    FPropertyChangedChainEvent & PropertyChangedEvent
) override

---

function PostEditUndo

virtual void PostEditUndo() override

---

function IsEditorOnly

inline virtual bool IsEditorOnly() const override

---

function DECLARE_MULTICAST_DELEGATE_OneParam

DECLARE_MULTICAST_DELEGATE_OneParam(
    FOnPreviewObjectChanged ,
    USMPreviewObject * 
)

---

function DECLARE_MULTICAST_DELEGATE_OneParam

DECLARE_MULTICAST_DELEGATE_OneParam(
    FOnPreviewWorldChanged ,
    UWorld * 
)

---

function InitializeStateMachine

USMInstance * InitializeStateMachine(
    UObject * InContext
)

Initialize the live state machine instance.

---

function ShutdownStateMachine

void ShutdownStateMachine()

Gracefully shutdown the state machine.

---

function SetFromBlueprint

void SetFromBlueprint(
    UBlueprint * Blueprint
)

Sets state machine properties from a blueprint.

---

function GetPreviewStateMachineActor

inline ASMPreviewStateMachineActor * GetPreviewStateMachineActor() const

The actor that was spawned in a preview world if any.

---

function SetPreviewWorld

void SetPreviewWorld(
    UWorld * InWorld,
    const bool bModify =false
)

Call before use so the preview object knows what world to spawn and destroy actors.

---

function SetCurrentWorld

void SetCurrentWorld(
    UWorld * InWorld
)

The current world: either simulation or preview.

---

function UpdateGameMode

void UpdateGameMode()

Signal that the game mode has updated.

---

function SpawnAllActors

void SpawnAllActors()

Spawns context and all preview actors.

---

function DestroyAllActors

void DestroyAllActors()

Destroys context and all preview actors.

---

function RefreshPreviewWorldActors

void RefreshPreviewWorldActors()

Signals to refresh actors, such as after a package has saved.

---

function ContainsActor

bool ContainsActor(
    AActor * CompareActor
) const

Checks if the actor is contained in the spawned actors.

---

function SaveAllActorReferences

void SaveAllActorReferences()

Save actor reference paths so they can be restored after an editor reset.

---

function RestoreAllActorReferences

void RestoreAllActorReferences()

Use saved actor paths to find the real actor references in the world.

---

function IsSimulationRunning

bool IsSimulationRunning() const

Checks if a state machine is currently running for simulation.

---

function GetPreviewWorld

inline UWorld * GetPreviewWorld() const

The current preview world if one exists.

---

function GetCurrentWorld

inline UWorld * GetCurrentWorld() const

The preview or simulation world.

---

function GetStateMachineTemplate

inline USMInstance * GetStateMachineTemplate() const

---

function SetSimulatedStateMachineInstance

void SetSimulatedStateMachineInstance(
    USMInstance * InInstance
)

---

function GetSimulatedStateMachineInstance

inline USMInstance * GetSimulatedStateMachineInstance() const

---

function GetGameMode

inline TSubclassOf< AGameModeBase > GetGameMode() const

---

function ShouldPossessPawnContext

inline bool ShouldPossessPawnContext() const

---

function SetContextActor

void SetContextActor(
    AActor * InActor
)

---

function GetContextActor

AActor * GetContextActor() const

---

function AddPreviewActor

void AddPreviewActor(
    FSMPreviewObjectSpawner & NewPreviewObject
)

Create an initial template and spawn the actor.

---

function RemovePreviewActor

void RemovePreviewActor(
    AActor * ActorToRemove
)

Searches for the preview spawner associated with this actor and removes it and despawns it.

---

function NotifySimulationStarted

void NotifySimulationStarted()

Inform the preview object simulation has started.

---

function NotifySimulationEnded

void NotifySimulationEnded()

Inform the preview object simulation has ended.

---

function BindActorDelegates

void BindActorDelegates()

Bind to engine actor delegates.

---

function ReleaseActorHandles

void ReleaseActorHandles()

Safely release and reset all delegate handles.

---

Protected Functions Documentation

function OnWorldDestroyed

void OnWorldDestroyed(
    UWorld * World
)

---

function GetAllActorReferences

void GetAllActorReferences(
    UObject * InObject,
    TMap< FName, FName > & PropertyNameValue
) const

---

function RestoreActorReferences

void RestoreActorReferences(
    UObject * InObject,
    ULevel * InLevel,
    const TMap< FName, FName > & PropertyNameValue
)

---

function SpawnActorForWorld

void SpawnActorForWorld(
    FSMPreviewObjectSpawner & InOutSpawner
)

---

function SpawnActorForWorld

AActor * SpawnActorForWorld(
    UWorld * InWorld,
    UClass * ActorClass,
    AActor * ActorTemplate,
    const FTransform & Transform
)

---

function DestroyActor

void DestroyActor(
    AActor * Actor
)

Destroy an actor but will not null out actor from the object spawner.

---

function GetPreviewSpawnerFromActor

FSMPreviewObjectSpawner * GetPreviewSpawnerFromActor(
    AActor * Actor
)

Find the preview reference from an actor.

---

function BuildActorMap

void BuildActorMap()

Quick access to finding a preview spawner given an actor. Should be rebuilt whenever PreviewObjects is modified.

---

Public Attributes Documentation

variable OnPreviewObjectChangedEvent

FOnPreviewObjectChanged OnPreviewObjectChangedEvent;

When a property of the preview object has changed.

---

variable OnWorldRefreshRequiredEvent

FOnPreviewObjectChanged OnWorldRefreshRequiredEvent;

When the preview object needs a new world.

---

variable OnSimulationStartedEvent

FOnPreviewObjectChanged OnSimulationStartedEvent;

When the simulation first starts.

---

variable OnSimulationEndedEvent

FOnPreviewObjectChanged OnSimulationEndedEvent;

When the simulation ends.

---

variable OnCurrentWorldChangedEvent

FOnPreviewWorldChanged OnCurrentWorldChangedEvent;

When a new world has been set such as from preview to simulation or back.

---

Private Attributes Documentation

variable OnWorldDestroyedHandle

FDelegateHandle OnWorldDestroyedHandle;

---

variable PieStartedHandle

FDelegateHandle PieStartedHandle;

---

variable ActorMovingHandle

FDelegateHandle ActorMovingHandle;

---

variable ActorMovedHandle

FDelegateHandle ActorMovedHandle;

---

variable ActorPropertyChangeHandle

FDelegateHandle ActorPropertyChangeHandle;

---

variable PreviewObjects

TArray< FSMPreviewObjectSpawner > PreviewObjects;

All objects to spawn into the preview world.

---

variable ActorNameToPreviewIndex

TMap< FName, int32 > ActorNameToPreviewIndex;

Actor name to the index of the PreviewObjects array.

---

variable ContextName

FName ContextName;

Actor name to use as the context.

---

variable CachedContextActor

TObjectPtr< AActor > CachedContextActor;

Current context actor for this session.

---

variable GameMode

TSubclassOf< AGameModeBase > GameMode;

The game mode to use when simulating.

---

variable bPossessPawnContext

bool bPossessPawnContext;

Possess a pawn context with the default player controller when simulating.

---

variable StateMachineTemplate

USMInstance * StateMachineTemplate;

The state machine to spawn into the simulation world.

---

variable SimulatedStateMachineInstance

TObjectPtr< USMInstance > SimulatedStateMachineInstance;

The SIMULATED state machine that is running. Hosted under a PreviewStateMachineActor if there is a valid world. This is set externally when a user starts simulation.

---

variable ActorPropertyToActorName

TMap< FName, FName > ActorPropertyToActorName;

Full property names mapped to actor names.

---

variable PreviewStateMachineInstance

TObjectPtr< USMInstance > PreviewStateMachineInstance;

The state machine instance in the PREVIEW world.

---

variable PreviewStateMachineActor

TObjectPtr< ASMPreviewStateMachineActor > PreviewStateMachineActor;

An actor to host a PREVIEW state machine.

---

variable PreviewWorld

TObjectPtr< UWorld > PreviewWorld;

The PREVIEW world if one exists.

---

variable CurrentWorld

TObjectPtr< UWorld > CurrentWorld;

Either preview or simulation.

---

variable SpawnedActors

TArray< TObjectPtr< AActor > > SpawnedActors;

Actors currently spawned in the world.

---

variable bSpawningActor

bool bSpawningActor;

True only during a spawn.

---

variable bDontModify

bool bDontModify;

Prevents Modify() from being called.

---

variable bIsSaving

bool bIsSaving;

True during serialize writing.

---