AnimSubsystem_Tag.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "AnimSubsystem.h"
#include "AnimSubsystem_Tag.generated.h"
 
struct FAnimNode_Base;
class UAnimInstance;
 
USTRUCT()
struct FAnimSubsystem_Tag : public FAnimSubsystem
{
    GENERATED_BODY()
 
public:
    ENGINE_API int32 FindNodeIndexByTag(FName InTag) const;
    
    template<typename NodeType>
    NodeType* FindNodeByTag(FName InTag, UAnimInstance* InInstance) const
    {
        return static_cast<NodeType*>(FindNodeByTag_Internal(InTag, InInstance, NodeType::StaticStruct()));
    }
 
    template<typename NodeType>
    const NodeType* FindNodeByTag(FName InTag, const UAnimInstance* InInstance) const
    {
        return static_cast<const NodeType*>(FindNodeByTag_Internal(InTag, const_cast<UAnimInstance*>(InInstance), NodeType::StaticStruct()));
    }
    
private:
    // FAnimSubsystem interface
    ENGINE_API virtual void OnPostLoadDefaults(FAnimSubsystemPostLoadDefaultsContext& InContext) override;
 
    // Internal impl for FindNodeByTag
    ENGINE_API FAnimNode_Base* FindNodeByTag_Internal(FName InTag, UAnimInstance* InInstance, UScriptStruct* InNodeType) const;
    
private:
    friend class UAnimBlueprintExtension_Tag;
    
    // Map of name->node index
    UPROPERTY()
    TMap<FName, int32> NodeIndices;
 
    // Anim class that contains this subsystem
    IAnimClassInterface* AnimClass = nullptr;
};