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Plugins/GMS/Source/GenericMovementSystem/Private/Locomotions/GMS_AnimLayer.cpp

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+// Copyright 2025 https://yuewu.dev/en  All Rights Reserved.
+
+
+#include "Locomotions/GMS_AnimLayer.h"
+#include "GameFramework/Pawn.h"
+#include "GMS_MovementSystemComponent.h"
+#include "Locomotions/GMS_MainAnimInstance.h"
+#include "Misc/DataValidation.h"
+#include "Settings/GMS_SettingObjectLibrary.h"
+
+#include UE_INLINE_GENERATED_CPP_BY_NAME(GMS_AnimLayer)
+
+
+bool UGMS_AnimLayerSetting::GetOverrideAnimLayerClass_Implementation(TSubclassOf<UGMS_AnimLayer>& OutLayerClass) const
+{
+	return false;
+}
+
+bool UGMS_AnimLayerSetting::K2_IsDataValid_Implementation(FText& ErrorText) const
+{
+	return true;
+}
+
+#if WITH_EDITOR
+
+EDataValidationResult UGMS_AnimLayerSetting::IsDataValid(class FDataValidationContext& Context) const
+{
+	FText ErrorText;
+	if (!IsTemplate() && !K2_IsDataValid(ErrorText))
+	{
+		Context.AddError(ErrorText);
+		return EDataValidationResult::Invalid;
+	}
+	return Super::IsDataValid(Context);
+}
+#endif
+
+
+void UGMS_AnimLayer::OnLinked_Implementation()
+{
+	// make sure to get reference to parent when linked.
+	if (!Parent.IsValid())
+	{
+		Parent = Cast<UGMS_MainAnimInstance>(GetSkelMeshComponent()->GetAnimInstance());
+		checkf(Parent!=nullptr, TEXT("Parent is not GMS_MainAnimInstance!"));
+	}
+	if (!PawnOwner)
+	{
+		PawnOwner = Cast<APawn>(GetOwningActor());
+		checkf(PawnOwner!=nullptr, TEXT("PawnOwner is not valid!"));
+	}
+	if (!MovementSystem)
+	{
+		MovementSystem = PawnOwner->FindComponentByClass<UGMS_MovementSystemComponent>();
+		checkf(MovementSystem!=nullptr, TEXT("Movement Sysytem Component is not valid!"));
+	}
+
+	if (!AnimStateNameToTagMapping.IsEmpty())
+	{
+		Parent->RegisterStateNameToTagMapping(this, AnimStateNameToTagMapping);
+	}
+}
+
+void UGMS_AnimLayer::OnUnlinked_Implementation()
+{
+	if (Parent.IsValid())
+	{
+		if (!AnimStateNameToTagMapping.IsEmpty())
+		{
+			Parent->UnregisterStateNameToTagMapping(this);
+		}
+		Parent = nullptr;
+	}
+}
+
+
+UGMS_AnimLayer::UGMS_AnimLayer()
+{
+	bUseMainInstanceMontageEvaluationData = true;
+}
+
+UGMS_MainAnimInstance* UGMS_AnimLayer::GetParent() const
+{
+	return Parent.Get();
+}
+
+void UGMS_AnimLayer::ApplySetting_Implementation(const UGMS_AnimLayerSetting* Setting)
+{
+}
+
+void UGMS_AnimLayer::ResetSetting_Implementation()
+{
+}
+
+void UGMS_AnimLayer::NativeInitializeAnimation()
+{
+	Super::NativeInitializeAnimation();
+
+	Parent = Cast<UGMS_MainAnimInstance>(GetSkelMeshComponent()->GetAnimInstance());
+
+	PawnOwner = Cast<APawn>(GetOwningActor());
+
+#if WITH_EDITOR
+	if (!GetWorld()->IsGameWorld())
+	{
+		// Use default objects for editor preview.
+
+		if (!Parent.IsValid())
+		{
+			Parent = GetMutableDefault<UGMS_MainAnimInstance>();
+		}
+
+		if (!IsValid(PawnOwner))
+		{
+			PawnOwner = GetMutableDefault<APawn>();
+		}
+	}
+#endif
+}
+
+void UGMS_AnimLayer::NativeBeginPlay()
+{
+	Super::NativeBeginPlay();
+
+	ensure(PawnOwner);
+
+	MovementSystem = PawnOwner->FindComponentByClass<UGMS_MovementSystemComponent>();
+}