BehaviorTreeManager.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Object.h"
#include "BehaviorTreeManager.generated.h"
 
class UBehaviorTree;
class UBehaviorTreeComponent;
class UBTCompositeNode;
class UBTDecorator;
 
USTRUCT()
struct FBehaviorTreeTemplateInfo
{
    GENERATED_USTRUCT_BODY()
 
    
    UPROPERTY()
    TObjectPtr<UBehaviorTree> Asset = nullptr;
 
    UPROPERTY(transient)
    TObjectPtr<UBTCompositeNode> Template = nullptr;
 
    uint16 InstanceMemorySize;
};
 
UCLASS(config=Engine, Transient, MinimalAPI)
class UBehaviorTreeManager : public UObject
{
    GENERATED_UCLASS_BODY()
 
    
    UPROPERTY(config)
    int32 MaxDebuggerSteps;
 
    AIMODULE_API bool LoadTree(UBehaviorTree& Asset, UBTCompositeNode*& Root, uint16& InstanceMemorySize);
 
    static AIMODULE_API uint16 GetAlignedDataSize(uint16 Size);
 
    static AIMODULE_API void InitializeMemoryHelper(const TArray<UBTDecorator*>& Nodes, TArray<uint16>& MemoryOffsets, int32& MemorySize, bool bForceInstancing = false);
 
    AIMODULE_API virtual void FinishDestroy() override;
 
    AIMODULE_API void DumpUsageStats() const;
 
    AIMODULE_API void AddActiveComponent(UBehaviorTreeComponent& Component);
 
    AIMODULE_API void RemoveActiveComponent(UBehaviorTreeComponent& Component);
 
    static AIMODULE_API UBehaviorTreeManager* GetCurrent(UWorld* World);
    static AIMODULE_API UBehaviorTreeManager* GetCurrent(UObject* WorldContextObject);
 
    TConstArrayView<TObjectPtr<UBehaviorTreeComponent>> GetActiveComponents() const 
    { 
        return ActiveComponents;
    }
 
protected:
 
    UPROPERTY()
    TArray<FBehaviorTreeTemplateInfo> LoadedTemplates;
 
    UPROPERTY()
    TArray<TObjectPtr<UBehaviorTreeComponent>> ActiveComponents;
};