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c135ebcd95
+ Added StateTree parameters usable for data bindings and that could be overriden on context initialization by a StateTreeReference + Added StateTreeReference struct to hold a reference to a StateTree asset along with a list of values to parameterized the tree. + Added named external data items that are defined bt the Schema and for which values must be provided at runtime through the execution context. + Added delegate OnPostCompile after successful compilation. The StateTreeReference listens to it to validate its parameters + EditorData now contains its own version of the schema and parameters. On successful compilation they are copied over the StateTree own properties. #rnx #rb mikko.mononen #preflight 6255d281647ad886b3593cb0 [CL 19727363 by Yoan StAmant in ue5-main branch]
115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "StateTree.h"
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#include "StateTreeLinker.h"
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#include "StateTreeNodeBase.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::ResetCompiled()
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{
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States.Reset();
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Transitions.Reset();
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Schema = nullptr;
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Parameters.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::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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if (!Link())
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{
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UE_LOG(LogStateTree, Error, TEXT("%s failed to link. Asset will not be usable at runtime."), *GetName());
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}
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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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if (!Link())
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{
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UE_LOG(LogStateTree, Error, TEXT("%s failed to link. Asset will not be usable at runtime."), *GetName());
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}
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}
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}
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bool UStateTree::Link()
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{
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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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ExternalDataDescs.Reset();
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NumDataViews = 0;
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ExternalDataBaseIndex = 0;
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// Resolves property paths used by bindings a store property pointers
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if (!PropertyBindings.ResolvePaths())
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{
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return false;
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}
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// Resolves nodes references to other StateTree data
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FStateTreeLinker Linker(Schema);
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Linker.SetExternalDataBaseIndex(PropertyBindings.GetSourceStructNum());
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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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const bool bLinkSucceeded = NodePtr->Link(Linker);
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if (!bLinkSucceeded || Linker.GetStatus() == EStateTreeLinkerStatus::Failed)
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{
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UE_LOG(LogStateTree, Error, TEXT("%s: node '%s' failed to resolve its references."), *GetName(), *NodePtr->StaticStruct()->GetName());
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return false;
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}
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}
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}
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// Link succeeded, setup tree to be ready to run
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ExternalDataBaseIndex = PropertyBindings.GetSourceStructNum();
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ExternalDataDescs = Linker.GetExternalDataDescs();
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NumDataViews = ExternalDataBaseIndex + ExternalDataDescs.Num();
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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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return true;
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}
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