UActorComponent* AActor::AddComponent(FName TemplateName, bool bManualAttachment, const FTransform& RelativeTransform, const UObject* ComponentTemplateContext)
{
UActorComponent* Template = nullptr;
UBlueprintGeneratedClass* BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>((ComponentTemplateContext != nullptr) ? ComponentTemplateContext->GetClass() : GetClass());
while(BlueprintGeneratedClass != nullptr)
{
Template = BlueprintGeneratedClass->FindComponentTemplateByName(TemplateName);
if(nullptr != Template)
{
break;
}
BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>(BlueprintGeneratedClass->GetSuperClass());
}
bool bIsSceneComponent = false;
UActorComponent* NewActorComp = CreateComponentFromTemplate(Template);
if(NewActorComp != nullptr)
{
// Call function to notify component it has been created
NewActorComp->OnComponentCreated();
// The user has the option of doing attachment manually where they have complete control or via the automatic rule
// that the first component added becomes the root component, with subsequent components attached to the root.
USceneComponent* NewSceneComp = Cast<USceneComponent>(NewActorComp);
if(NewSceneComp != nullptr)
{
if (!bManualAttachment)
{
if (RootComponent == nullptr)
{
RootComponent = NewSceneComp;
}
else
{
NewSceneComp->AttachTo(RootComponent);
}
}
NewSceneComp->SetRelativeTransform(RelativeTransform);
bIsSceneComponent = true;
}
// Register component, which will create physics/rendering state, now component is in correct position
NewActorComp->RegisterComponent();
UWorld* World = GetWorld();
if (!bRunningUserConstructionScript && World && bIsSceneComponent)
{
UPrimitiveComponent* NewPrimitiveComponent = Cast<UPrimitiveComponent>(NewActorComp);
if (NewPrimitiveComponent && ACullDistanceVolume::CanBeAffectedByVolumes(NewPrimitiveComponent))
{
World->UpdateCullDistanceVolumes(this, NewPrimitiveComponent);
}
}
}
return NewActorComp;
}
void UChildActorComponent::ApplyComponentInstanceData(FChildActorComponentInstanceData* ChildActorInstanceData, const ECacheApplyPhase CacheApplyPhase)
{
check(ChildActorInstanceData);
ChildActorName = ChildActorInstanceData->ChildActorName;
if (ChildActor)
{
// Only rename if it is safe to
if(ChildActorName != NAME_None)
{
const FString ChildActorNameString = ChildActorName.ToString();
if (ChildActor->Rename(*ChildActorNameString, nullptr, REN_Test))
{
ChildActor->Rename(*ChildActorNameString, nullptr, REN_DoNotDirty | (IsLoading() ? REN_ForceNoResetLoaders : REN_None));
}
}
if (ChildActorInstanceData->ComponentInstanceData)
{
ChildActorInstanceData->ComponentInstanceData->ApplyToActor(ChildActor, CacheApplyPhase);
}
USceneComponent* ChildActorRoot = ChildActor->GetRootComponent();
if (ChildActorRoot)
{
for (const auto& AttachInfo : ChildActorInstanceData->AttachedActors)
{
AActor* AttachedActor = AttachInfo.Actor.Get();
if (AttachedActor)
{
USceneComponent* AttachedRootComponent = AttachedActor->GetRootComponent();
if (AttachedRootComponent)
{
AttachedActor->DetachRootComponentFromParent();
AttachedRootComponent->AttachToComponent(ChildActorRoot, FAttachmentTransformRules::KeepWorldTransform, AttachInfo.SocketName);
AttachedRootComponent->SetRelativeTransform(AttachInfo.RelativeTransform);
AttachedRootComponent->UpdateComponentToWorld();
}
}
}
}
}
}
void FMovieScene3DConstraintTrackInstance::RestoreState(const TArray<UObject*>& RuntimeObjects, IMovieScenePlayer& Player, FMovieSceneSequenceInstance& SequenceInstance)
{
for (int32 ObjIndex = 0; ObjIndex < RuntimeObjects.Num(); ++ObjIndex)
{
if (!IsValid(RuntimeObjects[ObjIndex]))
{
continue;
}
USceneComponent* SceneComponent = MovieSceneHelpers::SceneComponentFromRuntimeObject(RuntimeObjects[ObjIndex]);
if (SceneComponent != nullptr)
{
FTransform *Transform = InitTransformMap.Find(RuntimeObjects[ObjIndex]);
if (Transform != nullptr)
{
SceneComponent->SetRelativeTransform(*Transform);
}
}
}
}
void UChildActorComponent::ApplyComponentInstanceData(FChildActorComponentInstanceData* ChildActorInstanceData)
{
check(ChildActorInstanceData);
ChildActorName = ChildActorInstanceData->ChildActorName;
if (ChildActor)
{
// Only rename if it is safe to
if(ChildActorName != NAME_None)
{
const FString ChildActorNameString = ChildActorName.ToString();
if (ChildActor->Rename(*ChildActorNameString, nullptr, REN_Test))
{
ChildActor->Rename(*ChildActorNameString, nullptr, REN_DoNotDirty);
}
}
USceneComponent* ChildActorRoot = ChildActor->GetRootComponent();
if (ChildActorRoot)
{
for (const auto& AttachInfo : ChildActorInstanceData->AttachedActors)
{
AActor* AttachedActor = AttachInfo.Actor.Get();
if (AttachedActor)
{
USceneComponent* AttachedRootComponent = AttachedActor->GetRootComponent();
if (AttachedRootComponent)
{
AttachedActor->DetachRootComponentFromParent();
AttachedRootComponent->AttachTo(ChildActorRoot, AttachInfo.SocketName, EAttachLocation::KeepWorldPosition);
AttachedRootComponent->SetRelativeTransform(AttachInfo.RelativeTransform);
AttachedRootComponent->UpdateComponentToWorld();
}
}
}
}
}
}
void FPreviewScene::AddComponent(UActorComponent* Component,const FTransform& LocalToWorld)
{
Components.AddUnique(Component);
USceneComponent* SceneComp = Cast<USceneComponent>(Component);
if(SceneComp && SceneComp->GetAttachParent() == NULL)
{
SceneComp->SetRelativeTransform(LocalToWorld);
}
Component->RegisterComponentWithWorld(GetWorld());
if (bForceAllUsedMipsResident)
{
// Add a mip streaming override to the new mesh
UMeshComponent* pMesh = Cast<UMeshComponent>(Component);
if (pMesh != NULL)
{
pMesh->SetTextureForceResidentFlag(true);
}
}
GetScene()->UpdateSpeedTreeWind(0.0);
}
void AActor::RerunConstructionScripts()
{
checkf(!HasAnyFlags(RF_ClassDefaultObject), TEXT("RerunConstructionScripts should never be called on a CDO as it can mutate the transient data on the CDO which then propagates to instances!"));
FEditorScriptExecutionGuard ScriptGuard;
// don't allow (re)running construction scripts on dying actors
bool bAllowReconstruction = !IsPendingKill() && !HasAnyFlags(RF_BeginDestroyed|RF_FinishDestroyed);
#if WITH_EDITOR
if(bAllowReconstruction && GIsEditor)
{
// Generate the blueprint hierarchy for this actor
TArray<UBlueprint*> ParentBPStack;
bAllowReconstruction = UBlueprint::GetBlueprintHierarchyFromClass(GetClass(), ParentBPStack);
if(bAllowReconstruction)
{
for(int i = ParentBPStack.Num() - 1; i > 0 && bAllowReconstruction; --i)
{
const UBlueprint* ParentBP = ParentBPStack[i];
if(ParentBP && ParentBP->bBeingCompiled)
{
// don't allow (re)running construction scripts if a parent BP is being compiled
bAllowReconstruction = false;
}
}
}
}
#endif
if(bAllowReconstruction)
{
// Set global flag to let system know we are reconstructing blueprint instances
TGuardValue<bool> GuardTemplateNameFlag(GIsReconstructingBlueprintInstances, true);
// Temporarily suspend the undo buffer; we don't need to record reconstructed component objects into the current transaction
ITransaction* CurrentTransaction = GUndo;
GUndo = NULL;
// Create cache to store component data across rerunning construction scripts
#if WITH_EDITOR
FActorTransactionAnnotation* ActorTransactionAnnotation = CurrentTransactionAnnotation.Get();
#endif
FComponentInstanceDataCache* InstanceDataCache;
FTransform OldTransform = FTransform::Identity;
FName SocketName;
AActor* Parent = NULL;
USceneComponent* ParentComponent = NULL;
bool bUseRootComponentProperties = true;
// Struct to store info about attached actors
struct FAttachedActorInfo
{
AActor* AttachedActor;
FName AttachedToSocket;
bool bSetRelativeTransform;
FTransform RelativeTransform;
};
// Save info about attached actors
TArray<FAttachedActorInfo> AttachedActorInfos;
#if WITH_EDITOR
if (ActorTransactionAnnotation)
{
InstanceDataCache = &ActorTransactionAnnotation->ComponentInstanceData;
if (ActorTransactionAnnotation->bRootComponentDataCached)
{
OldTransform = ActorTransactionAnnotation->RootComponentData.Transform;
Parent = ActorTransactionAnnotation->RootComponentData.AttachedParentInfo.Actor.Get();
if (Parent)
{
USceneComponent* AttachParent = ActorTransactionAnnotation->RootComponentData.AttachedParentInfo.AttachParent.Get();
ParentComponent = (AttachParent ? AttachParent : FindObjectFast<USceneComponent>(Parent, ActorTransactionAnnotation->RootComponentData.AttachedParentInfo.AttachParentName));
SocketName = ActorTransactionAnnotation->RootComponentData.AttachedParentInfo.SocketName;
DetachRootComponentFromParent();
}
for (const auto& CachedAttachInfo : ActorTransactionAnnotation->RootComponentData.AttachedToInfo)
{
AActor* AttachedActor = CachedAttachInfo.Actor.Get();
if (AttachedActor)
{
FAttachedActorInfo Info;
Info.AttachedActor = AttachedActor;
Info.AttachedToSocket = CachedAttachInfo.SocketName;
Info.bSetRelativeTransform = true;
Info.RelativeTransform = CachedAttachInfo.RelativeTransform;
AttachedActorInfos.Add(Info);
AttachedActor->DetachRootComponentFromParent();
}
}
bUseRootComponentProperties = false;
}
}
else
#endif
{
InstanceDataCache = new FComponentInstanceDataCache(this);
// If there are attached objects detach them and store the socket names
TArray<AActor*> AttachedActors;
GetAttachedActors(AttachedActors);
for (AActor* AttachedActor : AttachedActors)
{
USceneComponent* EachRoot = AttachedActor->GetRootComponent();
// If the component we are attached to is about to go away...
if (EachRoot && EachRoot->AttachParent && EachRoot->AttachParent->IsCreatedByConstructionScript())
{
// Save info about actor to reattach
FAttachedActorInfo Info;
Info.AttachedActor = AttachedActor;
Info.AttachedToSocket = EachRoot->AttachSocketName;
Info.bSetRelativeTransform = false;
AttachedActorInfos.Add(Info);
// Now detach it
AttachedActor->Modify();
EachRoot->DetachFromParent(true);
}
}
}
if (bUseRootComponentProperties && RootComponent != nullptr)
{
// Do not need to detach if root component is not going away
if (RootComponent->AttachParent != NULL && RootComponent->IsCreatedByConstructionScript())
{
Parent = RootComponent->AttachParent->GetOwner();
// Root component should never be attached to another component in the same actor!
if (Parent == this)
{
UE_LOG(LogActor, Warning, TEXT("RerunConstructionScripts: RootComponent (%s) attached to another component in this Actor (%s)."), *RootComponent->GetPathName(), *Parent->GetPathName());
Parent = NULL;
}
ParentComponent = RootComponent->AttachParent;
SocketName = RootComponent->AttachSocketName;
//detach it to remove any scaling
RootComponent->DetachFromParent(true);
}
OldTransform = RootComponent->ComponentToWorld;
OldTransform.SetTranslation(RootComponent->GetComponentLocation()); // take into account any custom location
}
#if WITH_EDITOR
// Save the current construction script-created components by name
TMap<const FName, UObject*> DestroyedComponentsByName;
TInlineComponentArray<UActorComponent*> PreviouslyAttachedComponents;
GetComponents(PreviouslyAttachedComponents);
for (auto Component : PreviouslyAttachedComponents)
{
if (Component)
{
if (Component->IsCreatedByConstructionScript())
{
DestroyedComponentsByName.Add(Component->GetFName(), Component);
}
else
{
UActorComponent* OuterComponent = Component->GetTypedOuter<UActorComponent>();
while (OuterComponent)
{
if (OuterComponent->IsCreatedByConstructionScript())
{
DestroyedComponentsByName.Add(Component->GetFName(), Component);
break;
}
OuterComponent = OuterComponent->GetTypedOuter<UActorComponent>();
}
}
}
}
#endif
// Destroy existing components
DestroyConstructedComponents();
// Reset random streams
ResetPropertiesForConstruction();
// Exchange net roles before running construction scripts
UWorld *OwningWorld = GetWorld();
if (OwningWorld && !OwningWorld->IsServer())
{
ExchangeNetRoles(true);
}
// Run the construction scripts
ExecuteConstruction(OldTransform, InstanceDataCache);
if(Parent)
{
USceneComponent* ChildRoot = GetRootComponent();
if (ParentComponent == NULL)
{
ParentComponent = Parent->GetRootComponent();
}
if (ChildRoot != NULL && ParentComponent != NULL)
{
ChildRoot->AttachTo(ParentComponent, SocketName, EAttachLocation::KeepWorldPosition);
}
}
// If we had attached children reattach them now - unless they are already attached
for(FAttachedActorInfo& Info : AttachedActorInfos)
{
// If this actor is no longer attached to anything, reattach
if (!Info.AttachedActor->IsPendingKill() && Info.AttachedActor->GetAttachParentActor() == NULL)
{
USceneComponent* ChildRoot = Info.AttachedActor->GetRootComponent();
if (ChildRoot && ChildRoot->AttachParent != RootComponent)
{
ChildRoot->AttachTo(RootComponent, Info.AttachedToSocket, EAttachLocation::KeepWorldPosition);
if (Info.bSetRelativeTransform)
{
ChildRoot->SetRelativeTransform(Info.RelativeTransform);
}
ChildRoot->UpdateComponentToWorld();
}
}
}
// Restore the undo buffer
GUndo = CurrentTransaction;
#if WITH_EDITOR
// Create the mapping of old->new components and notify the editor of the replacements
TMap<UObject*, UObject*> OldToNewComponentMapping;
TInlineComponentArray<UActorComponent*> NewComponents;
GetComponents(NewComponents);
for (auto NewComp : NewComponents)
{
const FName NewCompName = NewComp->GetFName();
if (DestroyedComponentsByName.Contains(NewCompName))
{
OldToNewComponentMapping.Add(DestroyedComponentsByName[NewCompName], NewComp);
}
}
if (GEditor && (OldToNewComponentMapping.Num() > 0))
{
GEditor->NotifyToolsOfObjectReplacement(OldToNewComponentMapping);
}
if (ActorTransactionAnnotation)
{
CurrentTransactionAnnotation = NULL;
}
else
#endif
{
delete InstanceDataCache;
}
}
}
UActorComponent* AActor::AddComponent(FName TemplateName, bool bManualAttachment, const FTransform& RelativeTransform, const UObject* ComponentTemplateContext)
{
UActorComponent* Template = NULL;
UBlueprintGeneratedClass* BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>((ComponentTemplateContext != NULL) ? ComponentTemplateContext->GetClass() : GetClass());
while(BlueprintGeneratedClass != NULL)
{
Template = BlueprintGeneratedClass->FindComponentTemplateByName(TemplateName);
if(NULL != Template)
{
break;
}
BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>(BlueprintGeneratedClass->GetSuperClass());
}
UActorComponent* NewActorComp = CreateComponentFromTemplate(Template);
if(NewActorComp != NULL)
{
// The user has the option of doing attachment manually where they have complete control or via the automatic rule
// that the first component added becomes the root component, with subsequent components attached to the root.
USceneComponent* NewSceneComp = Cast<USceneComponent>(NewActorComp);
bool bDeferRegisterStaticComponent = false;
EComponentMobility::Type OriginalMobility = EComponentMobility::Movable;
if(NewSceneComp != NULL)
{
// Components with Mobility set to EComponentMobility::Static or EComponentMobility::Stationary can't be properly set up in UCS (all changes will be rejected
// due to EComponentMobility::Static flag) so we're going to temporarily change the flag and defer the registration until UCS has finished.
bDeferRegisterStaticComponent = bRunningUserConstructionScript && NewSceneComp->Mobility != EComponentMobility::Movable;
OriginalMobility = NewSceneComp->Mobility;
if (bDeferRegisterStaticComponent)
{
NewSceneComp->Mobility = EComponentMobility::Movable;
}
if (!bManualAttachment)
{
if (RootComponent == NULL)
{
RootComponent = NewSceneComp;
}
else
{
NewSceneComp->AttachTo(RootComponent);
}
}
NewSceneComp->SetRelativeTransform(RelativeTransform);
}
// Call function to notify component it has been created
NewActorComp->OnComponentCreated();
if (bDeferRegisterStaticComponent)
{
// Defer registration until after UCS has completed.
FDeferRegisterStaticComponents::Get().DeferStaticComponent(this, NewSceneComp, OriginalMobility);
}
else
{
// Register component, which will create physics/rendering state, now component is in correct position
NewActorComp->RegisterComponent();
}
}
return NewActorComp;
}
