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e329242707
- State Tree property ref which can be used in BP tasks [CL 31470182 by mikko mononen in ue5-main branch]
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "StateTreeExecutionTypes.h"
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#include "UObject/ObjectMacros.h"
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#include "StateTreeNodeBlueprintBase.generated.h"
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struct FStateTreeEvent;
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struct FStateTreeEventQueue;
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struct FStateTreeInstanceStorage;
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struct FStateTreeLinker;
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struct FStateTreeExecutionContext;
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struct FStateTreeBlueprintPropertyRef;
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class UStateTree;
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UENUM()
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enum class EStateTreeBlueprintPropertyCategory : uint8
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{
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NotSet,
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Input,
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Parameter,
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Output,
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ContextObject,
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};
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/** Struct use to copy external data to the Blueprint item instance, resolved during StateTree linking. */
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struct STATETREEMODULE_API FStateTreeBlueprintExternalDataHandle
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{
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const FProperty* Property = nullptr;
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FStateTreeExternalDataHandle Handle;
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};
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UCLASS(Abstract)
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class STATETREEMODULE_API UStateTreeNodeBlueprintBase : public UObject
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{
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GENERATED_BODY()
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public:
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/** Sends event to the StateTree. */
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UFUNCTION(BlueprintCallable, Category = "StateTree", meta = (HideSelfPin = "true", DisplayName = "StateTree Send Event"))
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void SendEvent(const FStateTreeEvent& Event);
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/** Request state transition. */
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UFUNCTION(BlueprintCallable, Category = "StateTree", meta = (HideSelfPin = "true", DisplayName = "StateTree Request Transition"))
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void RequestTransition(const FStateTreeStateLink& TargetState, const EStateTreeTransitionPriority Priority = EStateTreeTransitionPriority::Normal);
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/** Returns a reference to selected property in State Tree. */
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UFUNCTION(CustomThunk)
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void GetPropertyReference(const FStateTreeBlueprintPropertyRef& PropertyRef) const;
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/** Returns true if reference to selected property in State Tree is accessible. */
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UFUNCTION()
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bool IsPropertyRefValid(const FStateTreeBlueprintPropertyRef& PropertyRef) const;
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protected:
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virtual UWorld* GetWorld() const override;
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AActor* GetOwnerActor(const FStateTreeExecutionContext& Context) const;
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/** These methods are const as they set mutable variables and need to be called from a const method. */
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void SetCachedInstanceDataFromContext(const FStateTreeExecutionContext& Context) const;
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void ClearCachedInstanceData() const;
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UE_DEPRECATED(5.2, "Use SetCachedInstanceDataFromContext() instead.")
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void SetCachedEventQueueFromContext(const FStateTreeExecutionContext& Context) const { SetCachedInstanceDataFromContext(Context); }
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UE_DEPRECATED(5.2, "Use ClearCachedInstanceData() instead.")
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void ClearCachedEventQueue() const { ClearCachedInstanceData(); }
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private:
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DECLARE_FUNCTION(execGetPropertyReference);
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void* GetMutablePtrToProperty(const FStateTreeBlueprintPropertyRef& PropertyRef, FProperty*& OutSourceProperty) const;
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/** Cached instance data while the node is active. */
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mutable TWeakPtr<FStateTreeInstanceStorage> WeakInstanceStorage;
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/** Cached owner while the node is active. */
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UPROPERTY()
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mutable TObjectPtr<UObject> CachedOwner = nullptr;
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/** Cached State Tree of owning execution frame. */
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UPROPERTY()
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mutable TObjectPtr<const UStateTree> CachedFrameStateTree = nullptr;
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/** Cached root state of owning execution frame. */
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mutable FStateTreeStateHandle CachedFrameRootState;
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/** Cached State where the node is processed on. */
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mutable FStateTreeStateHandle CachedState;
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};
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#if UE_ENABLE_INCLUDE_ORDER_DEPRECATED_IN_5_2
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#include "StateTreeEvents.h"
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#include "StateTreeExecutionContext.h"
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#endif
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