USceneComponent* FComponentReference::GetComponent(AActor* OwningActor) const
{
USceneComponent* Result = NULL;
// Component is specified directly, use that
if(OverrideComponent.IsValid())
{
Result = OverrideComponent.Get();
}
else
{
// Look in Actor if specified, OwningActor if not
AActor* SearchActor = (OtherActor != NULL) ? OtherActor : OwningActor;
if(SearchActor)
{
if(ComponentProperty != NAME_None)
{
UObjectPropertyBase* ObjProp = FindField<UObjectPropertyBase>(SearchActor->GetClass(), ComponentProperty);
if(ObjProp != NULL)
{
// .. and return the component that is there
Result = Cast<USceneComponent>(ObjProp->GetObjectPropertyValue_InContainer(SearchActor));
}
}
else
{
Result = Cast<USceneComponent>(SearchActor->GetRootComponent());
}
}
}
return Result;
}
/**
* Exports the property values for the specified object as text to the output device.
*
* @param Context Context from which the set of 'inner' objects is extracted. If NULL, an object iterator will be used.
* @param Out the output device to send the exported text to
* @param ObjectClass the class of the object to dump properties for
* @param Object the address of the object to dump properties for
* @param Indent number of spaces to prepend to each line of output
* @param DiffClass the class to use for comparing property values when delta export is desired.
* @param Diff the address of the object to use for determining whether a property value should be exported. If the value in Object matches the corresponding
* value in Diff, it is not exported. Specify NULL to export all properties.
* @param Parent the UObject corresponding to Object
* @param PortFlags flags used for modifying the output and/or behavior of the export
*/
void ExportProperties
(
const FExportObjectInnerContext* Context,
FOutputDevice& Out,
UClass* ObjectClass,
uint8* Object,
int32 Indent,
UClass* DiffClass,
uint8* Diff,
UObject* Parent,
uint32 PortFlags,
UObject* ExportRootScope
)
{
FString ThisName = TEXT("(none)");
check(ObjectClass != NULL);
for( UProperty* Property = ObjectClass->PropertyLink; Property; Property = Property->PropertyLinkNext )
{
if (!Property->ShouldPort(PortFlags))
continue;
ThisName = Property->GetName();
UArrayProperty* ArrayProperty = Cast<UArrayProperty>(Property);
UObjectPropertyBase* ExportObjectProp = (Property->PropertyFlags & CPF_ExportObject) != 0 ? Cast<UObjectPropertyBase>(Property) : NULL;
const uint32 ExportFlags = PortFlags | PPF_Delimited;
if ( ArrayProperty != NULL )
{
// Export dynamic array.
UProperty* InnerProp = ArrayProperty->Inner;
ExportObjectProp = (Property->PropertyFlags & CPF_ExportObject) != 0 ? Cast<UObjectPropertyBase>(InnerProp) : NULL;
// This is used as the default value in the case of an array property that has
// fewer elements than the exported object.
uint8* StructDefaults = NULL;
UStructProperty* StructProperty = Cast<UStructProperty>(InnerProp);
if ( StructProperty != NULL )
{
checkSlow(StructProperty->Struct);
StructDefaults = (uint8*)FMemory::Malloc(StructProperty->Struct->GetStructureSize());
StructProperty->InitializeValue(StructDefaults);
}
for( int32 PropertyArrayIndex=0; PropertyArrayIndex<Property->ArrayDim; PropertyArrayIndex++ )
{
void* Arr = Property->ContainerPtrToValuePtr<void>(Object, PropertyArrayIndex);
FScriptArrayHelper ArrayHelper(ArrayProperty, Arr);
void* DiffArr = NULL;
if( DiffClass )
{
DiffArr = Property->ContainerPtrToValuePtrForDefaults<void>(DiffClass, Diff, PropertyArrayIndex);
}
// we won't use this if DiffArr is NULL, but we have to set it up to something
FScriptArrayHelper DiffArrayHelper(ArrayProperty, DiffArr);
bool bAnyElementDiffered = false;
for( int32 DynamicArrayIndex=0; DynamicArrayIndex<ArrayHelper.Num(); DynamicArrayIndex++ )
{
FString Value;
// compare each element's value manually so that elements which match the NULL value for the array's inner property type
// but aren't in the diff array are still exported
uint8* SourceData = ArrayHelper.GetRawPtr(DynamicArrayIndex);
uint8* DiffData = DiffArr && DynamicArrayIndex < DiffArrayHelper.Num()
? DiffArrayHelper.GetRawPtr(DynamicArrayIndex)
: StructDefaults;
bool bExportItem = DiffData == NULL || (DiffData != SourceData && !InnerProp->Identical(SourceData, DiffData, ExportFlags));
if ( bExportItem )
{
bAnyElementDiffered = true;
InnerProp->ExportTextItem(Value, SourceData, DiffData, Parent, ExportFlags, ExportRootScope);
if(ExportObjectProp)
{
UObject* Obj = ExportObjectProp->GetObjectPropertyValue(ArrayHelper.GetRawPtr(DynamicArrayIndex));
check(!Obj || Obj->IsValidLowLevel());
if( Obj && !Obj->HasAnyMarks(OBJECTMARK_TagImp) )
{
// only export the BEGIN OBJECT block for a component if Parent is the component's Outer....when importing subobject definitions,
// (i.e. BEGIN OBJECT), whichever BEGIN OBJECT block a component's BEGIN OBJECT block is located within is the object that will be
// used as the Outer to create the component
// Is this an array of components?
if ( InnerProp->HasAnyPropertyFlags(CPF_InstancedReference) )
{
if ( Obj->GetOuter() == Parent )
{
// Don't export more than once.
Obj->Mark(OBJECTMARK_TagImp);
UExporter::ExportToOutputDevice( Context, Obj, NULL, Out, TEXT("T3D"), Indent, PortFlags );
}
else
{
// set the OBJECTMARK_TagExp flag so that the calling code knows we wanted to export this object
Obj->Mark(OBJECTMARK_TagExp);
}
}
else
{
// Don't export more than once.
Obj->Mark(OBJECTMARK_TagImp);
UExporter::ExportToOutputDevice( Context, Obj, NULL, Out, TEXT("T3D"), Indent, PortFlags );
}
}
}
Out.Logf( TEXT("%s%s(%i)=%s\r\n"), FCString::Spc(Indent), *Property->GetName(), DynamicArrayIndex, *Value );
}
// if some other element has already been determined to differ from the defaults, then export this item with no data so that
// the different array's size is maintained on import (this item will get the default values for that index, if any)
// however, if no elements of the array have changed, we still don't want to export anything
// so that the array size will also be taken from the defaults, which won't be the case if any element is exported
else if (bAnyElementDiffered)
{
Out.Logf( TEXT("%s%s(%i)=()\r\n"), FCString::Spc(Indent), *Property->GetName(), DynamicArrayIndex );
}
}
}
if (StructDefaults)
{
StructProperty->DestroyValue(StructDefaults);
FMemory::Free(StructDefaults);
}
}
else
{
for( int32 PropertyArrayIndex=0; PropertyArrayIndex<Property->ArrayDim; PropertyArrayIndex++ )
{
FString Value;
// Export single element.
uint8* DiffData = (DiffClass && Property->IsInContainer(DiffClass->GetPropertiesSize())) ? Diff : NULL;
if( Property->ExportText_InContainer( PropertyArrayIndex, Value, Object, DiffData, Parent, ExportFlags, ExportRootScope ) )
{
if ( ExportObjectProp )
{
UObject* Obj = ExportObjectProp->GetObjectPropertyValue(Property->ContainerPtrToValuePtr<void>(Object, PropertyArrayIndex));
if( Obj && !Obj->HasAnyMarks(OBJECTMARK_TagImp) )
{
// only export the BEGIN OBJECT block for a component if Parent is the component's Outer....when importing subobject definitions,
// (i.e. BEGIN OBJECT), whichever BEGIN OBJECT block a component's BEGIN OBJECT block is located within is the object that will be
// used as the Outer to create the component
if ( Property->HasAnyPropertyFlags(CPF_InstancedReference) )
{
if ( Obj->GetOuter() == Parent )
{
// Don't export more than once.
Obj->Mark(OBJECTMARK_TagImp);
UExporter::ExportToOutputDevice( Context, Obj, NULL, Out, TEXT("T3D"), Indent, PortFlags );
}
else
{
// set the OBJECTMARK_TagExp flag so that the calling code knows we wanted to export this object
Obj->Mark(OBJECTMARK_TagExp);
}
}
else
{
// Don't export more than once.
Obj->Mark(OBJECTMARK_TagImp);
UExporter::ExportToOutputDevice( Context, Obj, NULL, Out, TEXT("T3D"), Indent, PortFlags );
}
}
}
if( Property->ArrayDim == 1 )
{
Out.Logf( TEXT("%s%s=%s\r\n"), FCString::Spc(Indent), *Property->GetName(), *Value );
}
else
{
Out.Logf( TEXT("%s%s(%i)=%s\r\n"), FCString::Spc(Indent), *Property->GetName(), PropertyArrayIndex, *Value );
}
}
}
}
}
// Allows to import/export C++ properties in case the automatic unreal script mesh wouldn't work.
Parent->ExportCustomProperties(Out, Indent);
}
void UWidgetBlueprintGeneratedClass::InitializeWidget(UUserWidget* UserWidget) const
{
#if WITH_EDITORONLY_DATA
UWidgetTree* ClonedTree = DuplicateObject<UWidgetTree>(DesignerWidgetTree ? DesignerWidgetTree : WidgetTree, UserWidget);
#else
UWidgetTree* ClonedTree = DuplicateObject<UWidgetTree>(WidgetTree, UserWidget);
#endif
#if WITH_EDITOR
UserWidget->WidgetGeneratedBy = ClassGeneratedBy;
#endif
if ( ClonedTree )
{
ClonedTree->SetFlags(RF_Transactional);
UserWidget->WidgetTree = ClonedTree;
UClass* WidgetBlueprintClass = UserWidget->GetClass();
for(UWidgetAnimation* Animation : Animations)
{
UWidgetAnimation* Anim = DuplicateObject<UWidgetAnimation>( Animation, UserWidget );
if( Anim->MovieScene )
{
// Find property with the same name as the template and assign the new widget to it.
UObjectPropertyBase* Prop = FindField<UObjectPropertyBase>(WidgetBlueprintClass, Anim->MovieScene->GetFName());
if(Prop)
{
Prop->SetObjectPropertyValue_InContainer(UserWidget, Anim);
}
}
}
ClonedTree->ForEachWidget([&] (UWidget* Widget) {
// Not fatal if NULL, but shouldn't happen
if ( !ensure(Widget != nullptr) )
{
return;
}
#if WITH_EDITOR
Widget->WidgetGeneratedBy = ClassGeneratedBy;
#endif
// TODO UMG Make this an FName
FString VariableName = Widget->GetName();
Widget->bCreatedByConstructionScript = true; // Indicate it comes from a blueprint so it gets cleared when we rerun construction scripts
// Find property with the same name as the template and assign the new widget to it.
UObjectPropertyBase* Prop = FindField<UObjectPropertyBase>(WidgetBlueprintClass, *VariableName);
if ( Prop )
{
Prop->SetObjectPropertyValue_InContainer(UserWidget, Widget);
UObject* Value = Prop->GetObjectPropertyValue_InContainer(UserWidget);
check(Value == Widget);
}
// Perform binding
for ( const FDelegateRuntimeBinding& Binding : Bindings )
{
//TODO UMG Make this faster.
if ( Binding.ObjectName == VariableName )
{
UDelegateProperty* DelegateProperty = FindField<UDelegateProperty>(Widget->GetClass(), FName(*( Binding.PropertyName.ToString() + TEXT("Delegate") )));
if ( !DelegateProperty )
{
DelegateProperty = FindField<UDelegateProperty>(Widget->GetClass(), Binding.PropertyName);
}
if ( DelegateProperty )
{
bool bSourcePathBound = false;
if ( Binding.SourcePath.IsValid() )
{
bSourcePathBound = Widget->AddBinding(DelegateProperty, UserWidget, Binding.SourcePath);
}
// If no native binder is found then the only possibility is that the binding is for
// a delegate that doesn't match the known native binders available and so we
// fallback to just attempting to bind to the function directly.
if ( bSourcePathBound == false )
{
FScriptDelegate* ScriptDelegate = DelegateProperty->GetPropertyValuePtr_InContainer(Widget);
if ( ScriptDelegate )
{
ScriptDelegate->BindUFunction(UserWidget, Binding.FunctionName);
}
}
}
}
}
// Initialize Navigation Data
if (Widget->Navigation)
{
Widget->Navigation->ResolveExplictRules(ClonedTree);
}
#if WITH_EDITOR
Widget->ConnectEditorData();
#endif
});
// Bind any delegates on widgets
BindDynamicDelegates(UserWidget);
//TODO UMG Add OnWidgetInitialized?
}
}
void USimpleConstructionScript::ExecuteScriptOnActor(AActor* Actor, const FTransform& RootTransform, bool bIsDefaultTransform)
{
if(RootNodes.Num() > 0)
{
TSet<UActorComponent*> AllComponentsCreatedBySCS;
TInlineComponentArray<UActorComponent*> InstancedComponents;
for(auto NodeIt = RootNodes.CreateIterator(); NodeIt; ++NodeIt)
{
USCS_Node* RootNode = *NodeIt;
if(RootNode != nullptr)
{
// Get all native scene components
TInlineComponentArray<USceneComponent*> Components;
Actor->GetComponents(Components);
for (int32 Index = Components.Num()-1; Index >= 0; --Index)
{
USceneComponent* SceneComponent = Components[Index];
if (SceneComponent->CreationMethod == EComponentCreationMethod::Instance)
{
Components.RemoveAt(Index);
}
else
{
// Handle the native sub-component of an instance component case
USceneComponent* ParentSceneComponent = SceneComponent->GetTypedOuter<USceneComponent>();
if (ParentSceneComponent && ParentSceneComponent->CreationMethod == EComponentCreationMethod::Instance)
{
Components.RemoveAt(Index);
}
}
}
// Get the native root component; if it's not set, the first native scene component will be used as root. This matches what's done in the SCS editor.
USceneComponent* RootComponent = Actor->GetRootComponent();
if(RootComponent == nullptr && Components.Num() > 0)
{
RootComponent = Components[0];
}
// If the root node specifies that it has a parent
USceneComponent* ParentComponent = nullptr;
if(RootNode->ParentComponentOrVariableName != NAME_None)
{
// Get the Actor class object
UClass* ActorClass = Actor->GetClass();
check(ActorClass != nullptr);
// If the root node is parented to a "native" component (i.e. in the 'Components' array)
if(RootNode->bIsParentComponentNative)
{
for(int32 CompIndex = 0; CompIndex < Components.Num(); ++CompIndex)
{
// If we found a match, remember the index
if(Components[CompIndex]->GetFName() == RootNode->ParentComponentOrVariableName)
{
ParentComponent = Components[CompIndex];
break;
}
}
}
else
{
// In the non-native case, the SCS node's variable name property is used as the parent identifier
UObjectPropertyBase* Property = FindField<UObjectPropertyBase>(ActorClass, RootNode->ParentComponentOrVariableName);
if(Property != nullptr)
{
// If we found a matching property, grab its value and use that as the parent for this node
ParentComponent = Cast<USceneComponent>(Property->GetObjectPropertyValue_InContainer(Actor));
}
}
}
// Create the new component instance and any child components it may have
UActorComponent* InstancedComponent = RootNode->ExecuteNodeOnActor(Actor, ParentComponent != nullptr ? ParentComponent : RootComponent, &RootTransform, bIsDefaultTransform);
if(InstancedComponent != nullptr)
{
InstancedComponents.Add(InstancedComponent);
}
// get list of every component SCS created, in case some of them aren't in the attachment hierarchy any more (e.g. rigid bodies)
TInlineComponentArray<USceneComponent*> ComponentsAfterSCS;
Actor->GetComponents(ComponentsAfterSCS);
for (USceneComponent* C : ComponentsAfterSCS)
{
if (Components.Contains(C) == false)
{
AllComponentsCreatedBySCS.Add(C);
}
}
}
}
// Register all instanced SCS components once SCS execution has finished; sorted in order to register the scene component hierarchy first, followed by the remaining actor components (in case they happen to depend on something in the scene hierarchy)
InstancedComponents.Sort([](const UActorComponent& A, const UActorComponent& B) { return A.IsA<USceneComponent>(); });
for(auto InstancedComponent : InstancedComponents)
{
RegisterInstancedComponent(InstancedComponent);
}
// now that the instanced components in the attachment hierarchy are registered, register any other components that SCS made but aren't in the attachment hierarchy for whatever reason.
for (auto C : AllComponentsCreatedBySCS)
{
if (C->IsRegistered() == false)
{
C->RegisterComponent();
}
}
}
else if(Actor->GetRootComponent() == NULL) // Must have a root component at the end of SCS, so if we don't have one already (from base class), create a SceneComponent now
{
USceneComponent* SceneComp = NewObject<USceneComponent>(Actor);
SceneComp->SetFlags(RF_Transactional);
SceneComp->CreationMethod = EComponentCreationMethod::SimpleConstructionScript;
SceneComp->SetWorldTransform(RootTransform);
Actor->SetRootComponent(SceneComp);
SceneComp->RegisterComponent();
}
}
UPrimitiveComponent* UPhysicsConstraintComponent::GetComponentInternal(EConstraintFrame::Type Frame) const
{
UPrimitiveComponent* PrimComp = NULL;
FName ComponentName = NAME_None;
AActor* Actor = NULL;
// Frame 1
if(Frame == EConstraintFrame::Frame1)
{
// Use override component if specified
if(OverrideComponent1.IsValid())
{
return OverrideComponent1.Get();
}
ComponentName = ComponentName1.ComponentName;
Actor = ConstraintActor1;
}
// Frame 2
else
{
// Use override component if specified
if(OverrideComponent2.IsValid())
{
return OverrideComponent2.Get();
}
ComponentName = ComponentName2.ComponentName;
Actor = ConstraintActor2;
}
// If neither actor nor component name specified, joint to 'world'
if(Actor != NULL || ComponentName != NAME_None)
{
// If no actor specified, but component name is - use Owner
if(Actor == NULL)
{
Actor = GetOwner();
}
// If we now have an Actor, lets find a component
if(Actor != NULL)
{
// No name specified, use the root component
if(ComponentName == NAME_None)
{
PrimComp = Cast<UPrimitiveComponent>(Actor->GetRootComponent());
}
// Name specified, see if we can find that property..
else
{
UObjectPropertyBase* ObjProp = FindField<UObjectPropertyBase>(Actor->GetClass(), ComponentName);
if(ObjProp != NULL)
{
// .. and return the component that is there
PrimComp = Cast<UPrimitiveComponent>(ObjProp->GetObjectPropertyValue_InContainer(Actor));
}
}
}
}
return PrimComp;
}
