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49de6cb549
- Moved instance object directly on FStateTreeInstanceData to make easier to access - Internal instance data on FStateTreeExecutionContext is not property to simplify handling - Link & resolve properties on UStateTree when objects are replaced (to refresh cached property pointers) - Moved instance data initialization out from FStateTreeExecutionContext #preflight 623b0bff10251d53d5823f3e [CL 19477789 by mikko mononen in ue5-main branch]
105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "StateTree.h"
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#include "StateTreeEvaluatorBase.h"
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#include "StateTreeTaskBase.h"
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#include "CoreMinimal.h"
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#include "StateTreeConditionBase.h"
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#include "StateTreeDelegates.h"
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bool UStateTree::IsReadyToRun() const
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{
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// Valid tree must have at least one state and valid instance data.
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return States.Num() > 0 && InstanceDataDefaultValue.IsValid();
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}
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#if WITH_EDITOR
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void UStateTree::ResetBaked()
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{
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States.Reset();
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Transitions.Reset();
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Nodes.Reset();
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Instances.Reset();
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InstanceObjects.Reset();
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ExternalDataDescs.Reset();
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PropertyBindings.Reset();
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NumDataViews = 0;
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ExternalDataBaseIndex = 0;
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InstanceDataDefaultValue.Reset();
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}
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void UStateTree::PostEditChangeProperty(struct FPropertyChangedEvent& PropertyChangedEvent)
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{
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if (PropertyChangedEvent.MemberProperty && PropertyChangedEvent.Property)
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{
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if (PropertyChangedEvent.MemberProperty->GetFName() == GET_MEMBER_NAME_CHECKED(UStateTree, Schema))
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{
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UE::StateTree::Delegates::OnSchemaChanged.Broadcast(*this);
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}
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}
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}
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void UStateTree::GetAssetRegistryTags(TArray<FAssetRegistryTag>& OutTags) const
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{
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static const FName SchemaTag(TEXT("Schema"));
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const FString SchemaClassName = Schema ? Schema->GetClass()->GetName() : TEXT("");
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OutTags.Add(FAssetRegistryTag(SchemaTag, SchemaClassName, FAssetRegistryTag::TT_Alphabetical));
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Super::GetAssetRegistryTags(OutTags);
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}
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#endif // WITH_EDITOR
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void UStateTree::PostLoad()
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{
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Super::PostLoad();
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Link();
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}
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void UStateTree::Serialize(FStructuredArchiveRecord Record)
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{
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Super::Serialize(Record);
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// We need to link and rebind property bindings each time a BP is compiled,
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// because property bindings may get invalid, and instance data potentially needs refreshed.
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if (Record.GetUnderlyingArchive().IsModifyingWeakAndStrongReferences())
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{
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Link();
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}
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}
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void UStateTree::Link()
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{
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FStateTreeLinker Linker;
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ExternalDataBaseIndex = PropertyBindings.GetSourceStructNum();
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Linker.SetExternalDataBaseIndex(ExternalDataBaseIndex);
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for (FInstancedStruct& Node : Nodes)
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{
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if (FStateTreeNodeBase* NodePtr = Node.GetMutablePtr<FStateTreeNodeBase>())
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{
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Linker.SetCurrentInstanceDataType(NodePtr->GetInstanceDataType(), NodePtr->DataViewIndex);
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NodePtr->Link(Linker);
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}
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}
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ExternalDataDescs = Linker.GetExternalDataDescs();
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NumDataViews = ExternalDataBaseIndex + ExternalDataDescs.Num();
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// Initialize the instance data default value.
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// This data will be used to allocate runtime instance on all StateTree users.
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InstanceDataDefaultValue.Reset();
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if (Instances.Num() > 0)
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{
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InstanceDataDefaultValue.Initialize(*this, Instances, InstanceObjects);
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}
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PropertyBindings.ResolvePaths();
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}
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