C++ UK2Node_CallFunction::FindPinChecked方法代码示例

void UK2Node_EnumEquality::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();

	// Get the enum equality node and the KismetMathLibrary function info for use when we build those nodes
	FName ConditionalFunctionName = "";
	UClass* ConditionalFunctionClass = NULL;
	GetConditionalFunction(ConditionalFunctionName, &ConditionalFunctionClass);

	// Create the conditional node we're replacing the enum node for
	UK2Node_CallFunction* ConditionalNode = SourceGraph->CreateBlankNode<UK2Node_CallFunction>();
	ConditionalNode->FunctionReference.SetExternalMember(ConditionalFunctionName, ConditionalFunctionClass);
	ConditionalNode->AllocateDefaultPins();
	CompilerContext.MessageLog.NotifyIntermediateObjectCreation(ConditionalNode, this);

	// Rewire the enum pins to the new conditional node
	UEdGraphPin* LeftSideConditionalPin = ConditionalNode->FindPinChecked(TEXT("A"));
	UEdGraphPin* RightSideConditionalPin = ConditionalNode->FindPinChecked(TEXT("B"));
	UEdGraphPin* ReturnConditionalPin = ConditionalNode->FindPinChecked(Schema->PN_ReturnValue);
	UEdGraphPin* Input1Pin = GetInput1Pin();
	UEdGraphPin* Input2Pin = GetInput2Pin();
	LeftSideConditionalPin->PinType = Input1Pin->PinType;
	RightSideConditionalPin->PinType = Input2Pin->PinType;
	CompilerContext.MovePinLinksToIntermediate(*Input1Pin, *LeftSideConditionalPin);
	CompilerContext.MovePinLinksToIntermediate(*Input2Pin, *RightSideConditionalPin);
	CompilerContext.MovePinLinksToIntermediate(*GetReturnValuePin(), *ReturnConditionalPin);

	// Break all links to the Select node so it goes away for at scheduling time
	BreakAllNodeLinks();
}

void UK2Node_EaseFunction::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	/**
		At the end of this, the UK2Node_EaseFunction will not be a part of the Blueprint, it merely handles connecting
		the other nodes into the Blueprint.
	*/

	UFunction* Function = UKismetMathLibrary::StaticClass()->FindFunctionByName(*EaseFunctionName);
	if (Function == NULL)
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("InvalidFunctionName", "BaseAsyncTask: Type not supported or not initialized. @@").ToString(), this);
		return;
	}

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();

	// The call function does all the real work, each child class implementing easing for  a given type provides
	// the name of the desired function
	UK2Node_CallFunction* CallFunction = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
		
	CallFunction->SetFromFunction(Function);
	CallFunction->AllocateDefaultPins();
	CompilerContext.MessageLog.NotifyIntermediateObjectCreation(CallFunction, this);

	// Move the ease function and the alpha connections from us to the call function
	CompilerContext.MovePinLinksToIntermediate(*FindPin(FEaseFunctionNodeHelper::GetEaseFuncPinName()), *CallFunction->FindPin(TEXT("EasingFunc")));
	CompilerContext.MovePinLinksToIntermediate(*FindPin(FEaseFunctionNodeHelper::GetAlphaPinName()), *CallFunction->FindPin(TEXT("Alpha")));

	// Move base connections to the call function's connections
	CompilerContext.MovePinLinksToIntermediate(*FindPin(FEaseFunctionNodeHelper::GetAPinName()), *CallFunction->FindPin(TEXT("A")));
	CompilerContext.MovePinLinksToIntermediate(*FindPin(FEaseFunctionNodeHelper::GetBPinName()), *CallFunction->FindPin(TEXT("B")));
	CompilerContext.MovePinLinksToIntermediate(*FindPin(FEaseFunctionNodeHelper::GetResultPinName()), *CallFunction->GetReturnValuePin());

	// Now move the custom pins to their new locations
	UEdGraphPin* ShortestPathPin = FindPinChecked(FEaseFunctionNodeHelper::GetShortestPathPinName());
	if (!ShortestPathPin->bHidden)
	{
		CompilerContext.MovePinLinksToIntermediate(*ShortestPathPin, *CallFunction->FindPinChecked(TEXT("bShortestPath")));
	}

	UEdGraphPin* BlendExpPin = FindPinChecked(FEaseFunctionNodeHelper::GetBlendExpPinName());
	if (!BlendExpPin->bHidden)
	{
		CompilerContext.MovePinLinksToIntermediate(*BlendExpPin, *CallFunction->FindPinChecked(FEaseFunctionNodeHelper::GetBlendExpPinName()));
	}

	UEdGraphPin* StepsPin = FindPinChecked(FEaseFunctionNodeHelper::GetStepsPinName());
	if (!StepsPin->bHidden)
	{
		CompilerContext.MovePinLinksToIntermediate(*StepsPin, *CallFunction->FindPinChecked(FEaseFunctionNodeHelper::GetStepsPinName()));
	}

	// Cleanup links to ourself and we are done!
	BreakAllNodeLinks();
}

void FKCHandler_VariableSet::Transform(FKismetFunctionContext& Context, UEdGraphNode* Node)
{
    // Expands node out to include a (local) call to the RepNotify function if necessary
    UK2Node_VariableSet* SetNotify = Cast<UK2Node_VariableSet>(Node);
    if ((SetNotify != NULL))
    {
        if (SetNotify->ShouldFlushDormancyOnSet())
        {
            // Create CallFuncNode
            UK2Node_CallFunction* CallFuncNode = Node->GetGraph()->CreateBlankNode<UK2Node_CallFunction>();
            CallFuncNode->FunctionReference.SetExternalMember(NAME_FlushNetDormancy, AActor::StaticClass() );
            CallFuncNode->AllocateDefaultPins();

            // Copy self pin
            UEdGraphPin* NewSelfPin = CallFuncNode->FindPinChecked(CompilerContext.GetSchema()->PN_Self);
            UEdGraphPin* OldSelfPin = Node->FindPinChecked(CompilerContext.GetSchema()->PN_Self);
            NewSelfPin->CopyPersistentDataFromOldPin(*OldSelfPin);

            // link new CallFuncNode -> Set Node
            UEdGraphPin* OldExecPin = Node->FindPin(CompilerContext.GetSchema()->PN_Execute);
            check(OldExecPin);

            UEdGraphPin* NewExecPin = CallFuncNode->GetExecPin();
            if (ensure(NewExecPin))
            {
                NewExecPin->CopyPersistentDataFromOldPin(*OldExecPin);
                OldExecPin->BreakAllPinLinks();
                CallFuncNode->GetThenPin()->MakeLinkTo(OldExecPin);
            }
        }

        if (SetNotify->HasLocalRepNotify())
        {
            UK2Node_CallFunction* CallFuncNode = Node->GetGraph()->CreateBlankNode<UK2Node_CallFunction>();
            CallFuncNode->FunctionReference.SetExternalMember(SetNotify->GetRepNotifyName(), SetNotify->GetVariableSourceClass() );
            CallFuncNode->AllocateDefaultPins();

            // Copy self pin
            UEdGraphPin* NewSelfPin = CallFuncNode->FindPinChecked(CompilerContext.GetSchema()->PN_Self);
            UEdGraphPin* OldSelfPin = Node->FindPinChecked(CompilerContext.GetSchema()->PN_Self);
            NewSelfPin->CopyPersistentDataFromOldPin(*OldSelfPin);

            // link Set Node -> new CallFuncNode
            UEdGraphPin* OldThenPin = Node->FindPin(CompilerContext.GetSchema()->PN_Then);
            check(OldThenPin);

            UEdGraphPin* NewThenPin = CallFuncNode->GetThenPin();
            if (ensure(NewThenPin))
            {
                // Link Set Node -> Notify
                NewThenPin->CopyPersistentDataFromOldPin(*OldThenPin);
                OldThenPin->BreakAllPinLinks();
                OldThenPin->MakeLinkTo(CallFuncNode->GetExecPin());
            }
        }
    }
}

void UGameplayTagsK2Node_MultiCompareGameplayTagContainerSingleTags::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();

	// Get The input and output pins to our node
	UEdGraphPin* InPinSwitch = FindPin(TEXT("Gameplay Tag Container"));
	UEdGraphPin* InPinContainerMatchType = FindPin(TEXT("Tag Container Match Type"));
	UEdGraphPin* InPinTagsMatchType = FindPin(TEXT("Tags Match Type"));

	// For Each Pin Compare against the Tag container
	for (int32 Index = 0; Index < NumberOfPins; ++Index)
	{
		FString InPinName = TEXT("TagCase_") + FString::FormatAsNumber(Index);
		FString OutPinName = TEXT("Case_") + FString::FormatAsNumber(Index) + TEXT(" True");
		UEdGraphPin* InPinCase = FindPin(InPinName);
		UEdGraphPin* OutPinCase = FindPin(OutPinName);

		// Create call function node for the Compare function HasAllMatchingGameplayTags
		UK2Node_CallFunction* PinCallFunction = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
		const UFunction* Function = UBlueprintGameplayTagLibrary::StaticClass()->FindFunctionByName(GET_FUNCTION_NAME_CHECKED(UBlueprintGameplayTagLibrary, DoesContainerHaveTag));
		PinCallFunction->SetFromFunction(Function);
		PinCallFunction->AllocateDefaultPins();

		UEdGraphPin *TagContainerPin = PinCallFunction->FindPinChecked(FString(TEXT("TagContainer")));
		CompilerContext.CopyPinLinksToIntermediate(*InPinSwitch, *TagContainerPin);

		UEdGraphPin *TagPin = PinCallFunction->FindPinChecked(FString(TEXT("Tag")));
		CompilerContext.MovePinLinksToIntermediate(*InPinCase, *TagPin);

		UEdGraphPin *ContainerTagsMatchTypePin = PinCallFunction->FindPinChecked(FString(TEXT("ContainerTagsMatchType")));
		CompilerContext.CopyPinLinksToIntermediate(*InPinContainerMatchType, *ContainerTagsMatchTypePin);

		UEdGraphPin *TagMatchTypePin = PinCallFunction->FindPinChecked(FString(TEXT("TagMatchType")));
		CompilerContext.CopyPinLinksToIntermediate(*InPinTagsMatchType, *TagMatchTypePin);
		
		UEdGraphPin *OutPin = PinCallFunction->FindPinChecked(K2Schema->PN_ReturnValue);

		if (OutPinCase && OutPin)
		{
			OutPin->PinType = OutPinCase->PinType; // Copy type so it uses the right actor subclass
			CompilerContext.MovePinLinksToIntermediate(*OutPinCase, *OutPin);
		}
	}

	// Break any links to the expanded node
	BreakAllNodeLinks();
}

void UK2Node_CastByteToEnum::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	if (bSafe && Enum)
	{
		const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();

		// FUNCTION NODE
		const FName FunctionName = GetFunctionName();
		const UFunction* Function = UKismetNodeHelperLibrary::StaticClass()->FindFunctionByName(FunctionName);
		check(NULL != Function);
		UK2Node_CallFunction* CallValidation = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph); 
		CallValidation->SetFromFunction(Function);
		CallValidation->AllocateDefaultPins();
		check(CallValidation->IsNodePure());

		// FUNCTION ENUM PIN
		UEdGraphPin* FunctionEnumPin = CallValidation->FindPinChecked(TEXT("Enum"));
		Schema->TrySetDefaultObject(*FunctionEnumPin, Enum);
		check(FunctionEnumPin->DefaultObject == Enum);

		// FUNCTION INPUT BYTE PIN
		UEdGraphPin* OrgInputPin = FindPinChecked(ByteInputPinName);
		UEdGraphPin* FunctionIndexPin = CallValidation->FindPinChecked(TEXT("EnumeratorIndex"));
		check(EGPD_Input == FunctionIndexPin->Direction && Schema->PC_Byte == FunctionIndexPin->PinType.PinCategory);
		CompilerContext.MovePinLinksToIntermediate(*OrgInputPin, *FunctionIndexPin);

		// UNSAFE CAST NODE
		UK2Node_CastByteToEnum* UsafeCast = CompilerContext.SpawnIntermediateNode<UK2Node_CastByteToEnum>(this, SourceGraph); 
		UsafeCast->Enum = Enum;
		UsafeCast->bSafe = false;
		UsafeCast->AllocateDefaultPins();

		// UNSAFE CAST INPUT
		UEdGraphPin* CastInputPin = UsafeCast->FindPinChecked(ByteInputPinName);
		UEdGraphPin* FunctionReturnPin = CallValidation->GetReturnValuePin();
		check(NULL != FunctionReturnPin);
		Schema->TryCreateConnection(CastInputPin, FunctionReturnPin);

		// OPUTPUT PIN
		UEdGraphPin* OrgReturnPin = FindPinChecked(Schema->PN_ReturnValue);
		UEdGraphPin* NewReturnPin = UsafeCast->FindPinChecked(Schema->PN_ReturnValue);
		CompilerContext.MovePinLinksToIntermediate(*OrgReturnPin, *NewReturnPin);

		BreakAllNodeLinks();
	}
}

void FScriptBlueprintCompiler::CreateScriptDefinedFunction(FScriptField& Field)
{
	check(ContextProperty);
	
	UScriptBlueprint* Blueprint = ScriptBlueprint();
	const FString FunctionName = Field.Name.ToString();

	// Create Blueprint Graph which consists of 3 nodes: 'Entry', 'Get Script Context' and 'Call Function'
	// @todo: once we figure out how to get parameter lists for functions we can add suport for that here

	UEdGraph* ScriptFunctionGraph = NewObject<UEdGraph>(Blueprint, *FString::Printf(TEXT("%s_Graph"), *FunctionName));
	ScriptFunctionGraph->Schema = UEdGraphSchema_K2::StaticClass();
	ScriptFunctionGraph->SetFlags(RF_Transient);
	
	FKismetFunctionContext* FunctionContext = CreateFunctionContext();
	FunctionContext->SourceGraph = ScriptFunctionGraph;
	FunctionContext->bCreateDebugData = false;

	UK2Node_FunctionEntry* EntryNode = SpawnIntermediateNode<UK2Node_FunctionEntry>(NULL, ScriptFunctionGraph);
	EntryNode->CustomGeneratedFunctionName = Field.Name;
	EntryNode->AllocateDefaultPins();

	UK2Node_VariableGet* GetVariableNode = SpawnIntermediateNode<UK2Node_VariableGet>(NULL, ScriptFunctionGraph);
	GetVariableNode->VariableReference.SetSelfMember(ContextProperty->GetFName());
	GetVariableNode->AllocateDefaultPins();

	
	UK2Node_CallFunction* CallFunctionNode = SpawnIntermediateNode<UK2Node_CallFunction>(NULL, ScriptFunctionGraph);
	CallFunctionNode->FunctionReference.SetExternalMember(TEXT("CallScriptFunction"), ContextProperty->PropertyClass);
	CallFunctionNode->AllocateDefaultPins();
	UEdGraphPin* FunctionNamePin = CallFunctionNode->FindPinChecked(TEXT("FunctionName"));
	FunctionNamePin->DefaultValue = FunctionName;

	// Link nodes together
	UEdGraphPin* ExecPin = Schema->FindExecutionPin(*EntryNode, EGPD_Output);
	UEdGraphPin* GetVariableOutPin = GetVariableNode->FindPinChecked(ContextProperty->GetName());
	UEdGraphPin* CallFunctionPin = Schema->FindExecutionPin(*CallFunctionNode, EGPD_Input);
	UEdGraphPin* FunctionTargetPin = CallFunctionNode->FindPinChecked(TEXT("self"));
	ExecPin->MakeLinkTo(CallFunctionPin);
	GetVariableOutPin->MakeLinkTo(FunctionTargetPin);
}

void UK2Node_GetNumEnumEntries::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	if(NULL == Enum)
	{
		CompilerContext.MessageLog.Error(*FString::Printf(*NSLOCTEXT("K2Node", "GetNumEnumEntries_Error", "@@ must have a valid enum defined").ToString()), this);
		return;
	}

	// Force the enum to load its values if it hasn't already
	if (Enum->HasAnyFlags(RF_NeedLoad))
	{
		Enum->GetLinker()->Preload(Enum);
	}

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
	check(NULL != Schema);

	//MAKE LITERAL
	const FName FunctionName = GET_FUNCTION_NAME_CHECKED(UKismetSystemLibrary, MakeLiteralInt);
	UK2Node_CallFunction* MakeLiteralInt = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph); 
	MakeLiteralInt->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(FunctionName));
	MakeLiteralInt->AllocateDefaultPins();

	//OPUTPUT PIN
	UEdGraphPin* OrgReturnPin = FindPinChecked(Schema->PN_ReturnValue);
	UEdGraphPin* NewReturnPin = MakeLiteralInt->GetReturnValuePin();
	check(NULL != NewReturnPin);
	CompilerContext.MovePinLinksToIntermediate(*OrgReturnPin, *NewReturnPin);

	//INPUT PIN
	UEdGraphPin* InputPin = MakeLiteralInt->FindPinChecked(TEXT("Value"));
	check(EGPD_Input == InputPin->Direction);
	const FString DefaultValue = FString::FromInt(Enum->NumEnums() - 1);
	InputPin->DefaultValue = DefaultValue;

	BreakAllNodeLinks();
}

/**
 *	This is essentially a mix of K2Node_BaseAsyncTask::ExpandNode and K2Node_SpawnActorFromClass::ExpandNode.
 *	Several things are going on here:
 *		-Factory call to create proxy object (K2Node_BaseAsyncTask)
 *		-Task return delegates are created and hooked up (K2Node_BaseAsyncTask)
 *		-A BeginSpawn function is called on proxyu object (similiar to K2Node_SpawnActorFromClass)
 *		-BeginSpawn can choose to spawn or not spawn an actor (and return it)
 *			-If spawned:
 *				-SetVars are run on the newly spawned object (set expose on spawn variables - K2Node_SpawnActorFromClass)
 *				-FinishSpawn is called on the proxy object
 *				
 *				
 *	Also, a K2Node_SpawnActorFromClass could not be used directly here, since we want the proxy object to implement its own
 *	BeginSpawn/FinishSpawn function (custom game logic will often be performed in the native implementation). K2Node_SpawnActorFromClass also
 *	requires a SpawnTransform be wired into it, and in most ability task cases, the spawn transform is implied or not necessary.
 *	
 *	
 */
void UK2Node_LatentAbilityCall::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	bool validatedActorSpawn = ValidateActorSpawning(CompilerContext, false);
	bool validatedActorArraySpawn = ValidateActorArraySpawning(CompilerContext, false);

	UEdGraphPin* ClassPin = GetClassPin();
	if (ClassPin == nullptr)
	{
		// Nothing special about this task, just call super
		Super::ExpandNode(CompilerContext, SourceGraph);
		return;
	}

	UK2Node::ExpandNode(CompilerContext, SourceGraph);

	if (!validatedActorSpawn && !validatedActorArraySpawn)
	{
		ValidateActorSpawning(CompilerContext, true);
		ValidateActorArraySpawning(CompilerContext, true);
	}

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
	check(SourceGraph && Schema);
	bool bIsErrorFree = true;


	// ------------------------------------------------------------------------------------------
	// CREATE A CALL TO FACTORY THE PROXY OBJECT
	// ------------------------------------------------------------------------------------------
	UK2Node_CallFunction* const CallCreateProxyObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
	CallCreateProxyObjectNode->FunctionReference.SetExternalMember(ProxyFactoryFunctionName, ProxyFactoryClass);
	CallCreateProxyObjectNode->AllocateDefaultPins();
	bIsErrorFree &= CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(Schema->PN_Execute), *CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Execute)).CanSafeConnect();
	for (auto CurrentPin : Pins)
	{
		if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Input, Schema))
		{
			UEdGraphPin* DestPin = CallCreateProxyObjectNode->FindPin(CurrentPin->PinName); // match function inputs, to pass data to function from CallFunction node

			// NEW: if no DestPin, assume it is a Class Spawn PRoperty - not an error
			if (DestPin)
			{
				bIsErrorFree &= CompilerContext.CopyPinLinksToIntermediate(*CurrentPin, *DestPin).CanSafeConnect();
			}
		}
	}
	// ------------------------------------------------------------------------------------------
	// GATHER OUTPUT PARAMETERS AND PAIR THEM WITH LOCAL VARIABLES
	// ------------------------------------------------------------------------------------------
	TArray<FBaseAsyncTaskHelper::FOutputPinAndLocalVariable> VariableOutputs;
	for (auto CurrentPin : Pins)
	{
		if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Output, Schema))
		{
			const FEdGraphPinType& PinType = CurrentPin->PinType;
			UK2Node_TemporaryVariable* TempVarOutput = CompilerContext.SpawnInternalVariable(
				this, PinType.PinCategory, PinType.PinSubCategory, PinType.PinSubCategoryObject.Get(), PinType.bIsArray);
			bIsErrorFree &= TempVarOutput->GetVariablePin() && CompilerContext.MovePinLinksToIntermediate(*CurrentPin, *TempVarOutput->GetVariablePin()).CanSafeConnect();
			VariableOutputs.Add(FBaseAsyncTaskHelper::FOutputPinAndLocalVariable(CurrentPin, TempVarOutput));
		}
	}

	// ------------------------------------------------------------------------------------------
	// FOR EACH DELEGATE DEFINE EVENT, CONNECT IT TO DELEGATE AND IMPLEMENT A CHAIN OF ASSIGMENTS
	// ------------------------------------------------------------------------------------------
	UEdGraphPin* LastThenPin = CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Then);
	UEdGraphPin* const ProxyObjectPin = CallCreateProxyObjectNode->GetReturnValuePin();
	for (TFieldIterator<UMulticastDelegateProperty> PropertyIt(ProxyClass, EFieldIteratorFlags::ExcludeSuper); PropertyIt && bIsErrorFree; ++PropertyIt)
	{
		bIsErrorFree &= FBaseAsyncTaskHelper::HandleDelegateImplementation(*PropertyIt, VariableOutputs, ProxyObjectPin, LastThenPin, this, SourceGraph, CompilerContext);
	}

	if (CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Then) == LastThenPin)
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("MissingDelegateProperties", "BaseAsyncTask: Proxy has no delegates defined. @@").ToString(), this);
		return;
	}


	// ------------------------------------------------------------------------------------------
	// NEW: CREATE A CALL TO THE PRESPAWN FUNCTION, IF IT RETURNS TRUE, THEN WE WILL SPAWN THE NEW ACTOR
	// ------------------------------------------------------------------------------------------
//.........这里部分代码省略.........

bool UK2Node_LatentAbilityCall::ConnectSpawnProperties(UClass* ClassToSpawn, const UEdGraphSchema_K2* Schema, class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph, UEdGraphPin*& LastThenPin, UEdGraphPin* SpawnedActorReturnPin)
{
	bool bIsErrorFree = true;
	for (auto SpawnVarPin : SpawnParmPins)
	{
		const bool bHasDefaultValue = !SpawnVarPin->DefaultValue.IsEmpty() || !SpawnVarPin->DefaultTextValue.IsEmpty() || SpawnVarPin->DefaultObject;
		if (SpawnVarPin->LinkedTo.Num() > 0 || bHasDefaultValue)
		{
			if (SpawnVarPin->LinkedTo.Num() == 0)
			{
				UProperty* Property = FindField<UProperty>(ClassToSpawn, *SpawnVarPin->PinName);
				// NULL property indicates that this pin was part of the original node, not the 
				// class we're assigning to:
				if (!Property)
				{
					continue;
				}

				if (ClassToSpawn->ClassDefaultObject != nullptr)
				{
					// We don't want to generate an assignment node unless the default value 
					// differs from the value in the CDO:
					FString DefaultValueAsString;
					FBlueprintEditorUtils::PropertyValueToString(Property, (uint8*)ClassToSpawn->ClassDefaultObject, DefaultValueAsString);
					if (DefaultValueAsString == SpawnVarPin->DefaultValue)
					{
						continue;
					}
				}
			}


			UFunction* SetByNameFunction = Schema->FindSetVariableByNameFunction(SpawnVarPin->PinType);
			if (SetByNameFunction)
			{
				UK2Node_CallFunction* SetVarNode = NULL;
				if (SpawnVarPin->PinType.bIsArray)
				{
					SetVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallArrayFunction>(this, SourceGraph);
				}
				else
				{
					SetVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
				}
				SetVarNode->SetFromFunction(SetByNameFunction);
				SetVarNode->AllocateDefaultPins();

				// Connect this node into the exec chain
				bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, SetVarNode->GetExecPin());
				LastThenPin = SetVarNode->GetThenPin();

				static FString ObjectParamName = FString(TEXT("Object"));
				static FString ValueParamName = FString(TEXT("Value"));
				static FString PropertyNameParamName = FString(TEXT("PropertyName"));

				// Connect the new actor to the 'object' pin
				UEdGraphPin* ObjectPin = SetVarNode->FindPinChecked(ObjectParamName);
				SpawnedActorReturnPin->MakeLinkTo(ObjectPin);

				// Fill in literal for 'property name' pin - name of pin is property name
				UEdGraphPin* PropertyNamePin = SetVarNode->FindPinChecked(PropertyNameParamName);
				PropertyNamePin->DefaultValue = SpawnVarPin->PinName;

				UEdGraphPin* ValuePin = SetVarNode->FindPinChecked(ValueParamName);
				if (SpawnVarPin->LinkedTo.Num() == 0 &&
					SpawnVarPin->DefaultValue != FString() &&
					SpawnVarPin->PinType.PinCategory == Schema->PC_Byte &&
					SpawnVarPin->PinType.PinSubCategoryObject.IsValid() &&
					SpawnVarPin->PinType.PinSubCategoryObject->IsA<UEnum>())
				{
					// Pin is an enum, we need to alias the enum value to an int:
					UK2Node_EnumLiteral* EnumLiteralNode = CompilerContext.SpawnIntermediateNode<UK2Node_EnumLiteral>(this, SourceGraph);
					EnumLiteralNode->Enum = CastChecked<UEnum>(SpawnVarPin->PinType.PinSubCategoryObject.Get());
					EnumLiteralNode->AllocateDefaultPins();
					EnumLiteralNode->FindPinChecked(Schema->PN_ReturnValue)->MakeLinkTo(ValuePin);

					UEdGraphPin* InPin = EnumLiteralNode->FindPinChecked(UK2Node_EnumLiteral::GetEnumInputPinName());
					InPin->DefaultValue = SpawnVarPin->DefaultValue;
				}
				else
				{
					// Move connection from the variable pin on the spawn node to the 'value' pin
					CompilerContext.MovePinLinksToIntermediate(*SpawnVarPin, *ValuePin);
					SetVarNode->PinConnectionListChanged(ValuePin);
				}
			}
		}
	}
	return bIsErrorFree;
}

void UK2Node_SpawnActor::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	if (CompilerContext.bIsFullCompile)
	{
		static FName BeginSpawningBlueprintFuncName = GET_FUNCTION_NAME_CHECKED(UGameplayStatics, BeginSpawningActorFromBlueprint);
		static FString BlueprintParamName = FString(TEXT("Blueprint"));
		static FString WorldContextParamName = FString(TEXT("WorldContextObject"));

		static FName FinishSpawningFuncName = GET_FUNCTION_NAME_CHECKED(UGameplayStatics, FinishSpawningActor);
		static FString ActorParamName = FString(TEXT("Actor"));
		static FString TransformParamName = FString(TEXT("SpawnTransform"));
		static FString NoCollisionFailParamName = FString(TEXT("bNoCollisionFail"));

		static FString ObjectParamName = FString(TEXT("Object"));
		static FString ValueParamName = FString(TEXT("Value"));
		static FString PropertyNameParamName = FString(TEXT("PropertyName"));

		const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();

		UEdGraphPin* SpawnNodeExec = GetExecPin();
		UEdGraphPin* SpawnNodeTransform = GetSpawnTransformPin();
		UEdGraphPin* SpawnNodeNoCollisionFail = GetNoCollisionFailPin();
		UEdGraphPin* SpawnWorldContextPin = GetWorldContextPin();
		UEdGraphPin* SpawnBlueprintPin = GetBlueprintPin();
		UEdGraphPin* SpawnNodeThen = GetThenPin();
		UEdGraphPin* SpawnNodeResult = GetResultPin();

		UBlueprint* SpawnBlueprint = NULL;
		if(SpawnBlueprintPin != NULL)
		{
			SpawnBlueprint = Cast<UBlueprint>(SpawnBlueprintPin->DefaultObject);
		}

		if(0 == SpawnBlueprintPin->LinkedTo.Num())	
		{
			if(NULL == SpawnBlueprint)
			{
				CompilerContext.MessageLog.Error(*LOCTEXT("SpawnActorNodeMissingBlueprint_Error", "Spawn node @@ must have a blueprint specified.").ToString(), this);
				// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
				BreakAllNodeLinks();
				return;
			}

			// check if default blueprint is based on Actor
			const UClass* GeneratedClass = SpawnBlueprint->GeneratedClass;
			bool bInvalidBase = GeneratedClass && !GeneratedClass->IsChildOf(AActor::StaticClass());

			const UClass* SkeletonGeneratedClass = Cast<UClass>(SpawnBlueprint->SkeletonGeneratedClass);
			bInvalidBase |= SkeletonGeneratedClass && !SkeletonGeneratedClass->IsChildOf(AActor::StaticClass());

			if(bInvalidBase)
			{
				CompilerContext.MessageLog.Error(*LOCTEXT("SpawnActorNodeInvalidBlueprint_Error", "Spawn node @@ must have a blueprint based on Actor specified.").ToString(), this);
				// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
				BreakAllNodeLinks();
				return;
			}
		}

		//////////////////////////////////////////////////////////////////////////
		// create 'begin spawn' call node
		UK2Node_CallFunction* CallBeginSpawnNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
		CallBeginSpawnNode->FunctionReference.SetExternalMember(BeginSpawningBlueprintFuncName, UGameplayStatics::StaticClass());
		CallBeginSpawnNode->AllocateDefaultPins();

		UEdGraphPin* CallBeginExec = CallBeginSpawnNode->GetExecPin();
		UEdGraphPin* CallBeginWorldContextPin = CallBeginSpawnNode->FindPinChecked(WorldContextParamName);
		UEdGraphPin* CallBeginBlueprintPin = CallBeginSpawnNode->FindPinChecked(BlueprintParamName);
		UEdGraphPin* CallBeginTransform = CallBeginSpawnNode->FindPinChecked(TransformParamName);
		UEdGraphPin* CallBeginNoCollisionFail = CallBeginSpawnNode->FindPinChecked(NoCollisionFailParamName);
		UEdGraphPin* CallBeginResult = CallBeginSpawnNode->GetReturnValuePin();

		// Move 'exec' connection from spawn node to 'begin spawn'
		CompilerContext.MovePinLinksToIntermediate(*SpawnNodeExec, *CallBeginExec);

		if(SpawnBlueprintPin->LinkedTo.Num() > 0)
		{
			// Copy the 'blueprint' connection from the spawn node to 'begin spawn'
			CompilerContext.MovePinLinksToIntermediate(*SpawnBlueprintPin, *CallBeginBlueprintPin);
		}
		else
		{
			// Copy blueprint literal onto begin spawn call 
			CallBeginBlueprintPin->DefaultObject = SpawnBlueprint;
		}

		// Copy the world context connection from the spawn node to 'begin spawn' if necessary
		if (SpawnWorldContextPin)
		{
			CompilerContext.MovePinLinksToIntermediate(*SpawnWorldContextPin, *CallBeginWorldContextPin);
		}

		// Copy the 'transform' connection from the spawn node to 'begin spawn'
		CompilerContext.MovePinLinksToIntermediate(*SpawnNodeTransform, *CallBeginTransform);
		
		// Copy the 'bNoCollisionFail' connection from the spawn node to 'begin spawn'
		CompilerContext.MovePinLinksToIntermediate(*SpawnNodeNoCollisionFail, *CallBeginNoCollisionFail);

//.........这里部分代码省略.........

	bool BuildLoop(UK2Node* Node, FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
	{
		const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
		check(Node && SourceGraph && Schema);

		bool bResult = true;

		// Create int Loop Counter
		UK2Node_TemporaryVariable* LoopCounterNode = CompilerContext.SpawnIntermediateNode<UK2Node_TemporaryVariable>(Node, SourceGraph);
		LoopCounterNode->VariableType.PinCategory = Schema->PC_Int;
		LoopCounterNode->AllocateDefaultPins();
		LoopCounterOutPin = LoopCounterNode->GetVariablePin();
		check(LoopCounterOutPin);

		// Initialize loop counter
		UK2Node_AssignmentStatement* LoopCounterInitialize = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(Node, SourceGraph);
		LoopCounterInitialize->AllocateDefaultPins();
		LoopCounterInitialize->GetValuePin()->DefaultValue = TEXT("0");
		bResult &= Schema->TryCreateConnection(LoopCounterOutPin, LoopCounterInitialize->GetVariablePin());
		StartLoopExecInPin = LoopCounterInitialize->GetExecPin();
		check(StartLoopExecInPin);

		// Create int Array Index
		UK2Node_TemporaryVariable* ArrayIndexNode = CompilerContext.SpawnIntermediateNode<UK2Node_TemporaryVariable>(Node, SourceGraph);
		ArrayIndexNode->VariableType.PinCategory = Schema->PC_Int;
		ArrayIndexNode->AllocateDefaultPins();
		ArrayIndexOutPin = ArrayIndexNode->GetVariablePin();
		check(ArrayIndexOutPin);

		// Initialize array index
		UK2Node_AssignmentStatement* ArrayIndexInitialize = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(Node, SourceGraph);
		ArrayIndexInitialize->AllocateDefaultPins();
		ArrayIndexInitialize->GetValuePin()->DefaultValue = TEXT("0");
		bResult &= Schema->TryCreateConnection(ArrayIndexOutPin, ArrayIndexInitialize->GetVariablePin());
		bResult &= Schema->TryCreateConnection(LoopCounterInitialize->GetThenPin(), ArrayIndexInitialize->GetExecPin());

		// Do loop branch
		UK2Node_IfThenElse* Branch = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(Node, SourceGraph);
		Branch->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(ArrayIndexInitialize->GetThenPin(), Branch->GetExecPin());
		LoopCompleteOutExecPin = Branch->GetElsePin();
		check(LoopCompleteOutExecPin);

		// Do loop condition
		UK2Node_CallFunction* Condition = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(Node, SourceGraph); 
		Condition->SetFromFunction(UKismetMathLibrary::StaticClass()->FindFunctionByName(TEXT("Less_IntInt")));
		Condition->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(Condition->GetReturnValuePin(), Branch->GetConditionPin());
		bResult &= Schema->TryCreateConnection(Condition->FindPinChecked(TEXT("A")), LoopCounterOutPin);
		LoopCounterLimitInPin = Condition->FindPinChecked(TEXT("B"));
		check(LoopCounterLimitInPin);

		// Array Index assigned
		UK2Node_AssignmentStatement* ArrayIndexAssign = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(Node, SourceGraph);
		ArrayIndexAssign->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(Branch->GetThenPin(), ArrayIndexAssign->GetExecPin());
		bResult &= Schema->TryCreateConnection(ArrayIndexAssign->GetVariablePin(), ArrayIndexOutPin);
		bResult &= Schema->TryCreateConnection(ArrayIndexAssign->GetValuePin(), LoopCounterOutPin);

		// body sequence
		UK2Node_ExecutionSequence* Sequence = CompilerContext.SpawnIntermediateNode<UK2Node_ExecutionSequence>(Node, SourceGraph);
		Sequence->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(ArrayIndexAssign->GetThenPin(), Sequence->GetExecPin());
		InsideLoopExecOutPin = Sequence->GetThenPinGivenIndex(0);
		check(InsideLoopExecOutPin);

		// Loop Counter increment
		UK2Node_CallFunction* Increment = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(Node, SourceGraph); 
		Increment->SetFromFunction(UKismetMathLibrary::StaticClass()->FindFunctionByName(TEXT("Add_IntInt")));
		Increment->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(Increment->FindPinChecked(TEXT("A")), LoopCounterOutPin);
		Increment->FindPinChecked(TEXT("B"))->DefaultValue = TEXT("1");

		// Loop Counter assigned
		UK2Node_AssignmentStatement* LoopCounterAssign = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(Node, SourceGraph);
		LoopCounterAssign->AllocateDefaultPins();
		bResult &= Schema->TryCreateConnection(LoopCounterAssign->GetExecPin(), Sequence->GetThenPinGivenIndex(1));
		bResult &= Schema->TryCreateConnection(LoopCounterAssign->GetVariablePin(), LoopCounterOutPin);
		bResult &= Schema->TryCreateConnection(LoopCounterAssign->GetValuePin(), Increment->GetReturnValuePin());
		bResult &= Schema->TryCreateConnection(LoopCounterAssign->GetThenPin(), Branch->GetExecPin());

		return bResult;
	}

void UK2Node_LiveEditObject::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();

	UEdGraphPin *SourceExecPin = GetExecPin();
	UEdGraphPin *SourceThenPin = GetThenPin();
	UEdGraphPin *SourceBlueprintPin = GetBlueprintPin();
	UEdGraphPin *SourceBaseClassPin = GetBaseClassPin();
	UEdGraphPin *SourceDescriptionPin = GetDescriptionPin();
	UEdGraphPin *SourcePermittedBindingsPin = GetPermittedBindingsPin();
	UEdGraphPin *SourceOnMidiInputPin = GetOnMidiInputPin();

	UEdGraphPin *SourceVariablePin = GetVariablePin();
	if(NULL == SourceVariablePin)
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("LiveEditObjectNodeMissingBlueprint_Error", "LiveEdit node @@ must have a blueprint specified and a variable selected to tune.").ToString(), this);
		// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
		BreakAllNodeLinks();
		return;
	}

	UClass* SpawnClass = GetClassToSpawn();
	if(NULL == SpawnClass)
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("LiveEditObjectNodeMissingBaseClass_Error", "LiveEdit node @@ must have a Base Class specified.").ToString(), this);
		// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
		BreakAllNodeLinks();
		return;
	}

	if ( SourcePermittedBindingsPin->LinkedTo.Num() == 0 )
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("LiveEditObjectNodeMissingBinding_Error", "LiveEdit node @@ must specify Permitted Bindings.").ToString(), this);
		// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
		BreakAllNodeLinks();
		return;
	}

	//sanity check the VariablePin value
	{
		UProperty *Property = UK2Node_LiveEditObjectStatics::GetPropertyByName( SpawnClass, *SourceVariablePin->DefaultValue );
		if ( Property == NULL || !Property->IsA(UNumericProperty::StaticClass()) )
		{
			CompilerContext.MessageLog.Error(*LOCTEXT("LiveEditObjectNodeInvalidVariable_Error", "LiveEdit node @@ must have a valid variable selected.").ToString(), this);
			// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
			BreakAllNodeLinks();
			return;
		}
	}

	//hooks to pins that are generated after a BaseClass is set
	UEdGraphPin *DeltaMultPin = GetDeltaMultPin();
	UEdGraphPin *ShouldClampPin = GetShouldClampPin();
	UEdGraphPin *ClampMinPin = GetClampMinPin();
	UEdGraphPin *ClampMaxPin = GetClampMaxPin();

	UK2Node_Self *SelfNode  = CompilerContext.SpawnIntermediateNode<UK2Node_Self>(this,SourceGraph);
	SelfNode->AllocateDefaultPins();
	UEdGraphPin *SelfNodeThenPin = SelfNode->FindPinChecked(Schema->PN_Self);

	FString EventNameGuid = GetEventName();
		
	//Create the registration part of the LiveEditor binding process
	{
		UK2Node_CallFunction *RegisterForMIDINode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
		RegisterForMIDINode->FunctionReference.SetExternalMember( TEXT("RegisterForLiveEditEvent"), ULiveEditorKismetLibrary::StaticClass() );
		RegisterForMIDINode->AllocateDefaultPins();

		UEdGraphPin *ExecPin = RegisterForMIDINode->GetExecPin();
		CompilerContext.MovePinLinksToIntermediate(*SourceExecPin, *ExecPin);

		UEdGraphPin *ThenPin = RegisterForMIDINode->GetThenPin();
		CompilerContext.MovePinLinksToIntermediate(*SourceThenPin, *ThenPin);

		UEdGraphPin *TargetPin = RegisterForMIDINode->FindPinChecked( FString(TEXT("Target")) );
		TargetPin->MakeLinkTo(SelfNodeThenPin);

		UEdGraphPin *EventNamePin = RegisterForMIDINode->FindPinChecked( FString(TEXT("EventName")) );
		EventNamePin->DefaultValue = EventNameGuid;
		
		UEdGraphPin *DescriptionPin = RegisterForMIDINode->FindPinChecked( FString(TEXT("Description")) );
		CompilerContext.CopyPinLinksToIntermediate( *SourceDescriptionPin, *DescriptionPin);

		UEdGraphPin *PermittedBindingsPin = RegisterForMIDINode->FindPinChecked( FString(TEXT("PermittedBindings")) );
		CompilerContext.CopyPinLinksToIntermediate( *SourcePermittedBindingsPin, *PermittedBindingsPin);
	}

	//Create the event handling part of the LiveEditor binding process
	{
		//
		//the event itself
		//
		UFunction *EventMIDISignature = GetEventMIDISignature();
		UK2Node_Event* EventNode = CompilerContext.SpawnIntermediateNode<UK2Node_Event>(this, SourceGraph);
		check(EventNode);
		EventNode->EventSignatureClass = Cast<UClass>(EventMIDISignature->GetOuter());
		EventNode->EventSignatureName = EventMIDISignature->GetFName();
		EventNode->CustomFunctionName = *EventNameGuid;
//.........这里部分代码省略.........

void UK2Node_GetEnumeratorName::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	UEnum* Enum = GetEnum();
	if(NULL == Enum)
	{
		CompilerContext.MessageLog.Error(*FString::Printf(*NSLOCTEXT("K2Node", "GetEnumeratorNam_Error_MustHaveValidName", "@@ must have a valid enum defined").ToString()), this);
		return;
	}

	const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
		
	const UFunction* Function = UKismetNodeHelperLibrary::StaticClass()->FindFunctionByName( GetFunctionName() );
	check(NULL != Function);
	UK2Node_CallFunction* CallGetName = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph); 
	CallGetName->SetFromFunction(Function);
	CallGetName->AllocateDefaultPins();
	check(CallGetName->IsNodePure());
		
	//OPUTPUT PIN
	UEdGraphPin* OrgReturnPin = FindPinChecked(Schema->PN_ReturnValue);
	UEdGraphPin* NewReturnPin = CallGetName->GetReturnValuePin();
	check(NULL != NewReturnPin);
	CompilerContext.MovePinLinksToIntermediate(*OrgReturnPin, *NewReturnPin);

	//ENUM PIN
	UEdGraphPin* EnumPin = CallGetName->FindPinChecked(TEXT("Enum"));
	Schema->TrySetDefaultObject(*EnumPin, Enum);
	check(EnumPin->DefaultObject == Enum);

	//VALUE PIN
	UEdGraphPin* OrgInputPin = FindPinChecked(EnumeratorPinName);
	UEdGraphPin* IndexPin = CallGetName->FindPinChecked(TEXT("EnumeratorValue"));
	check(EGPD_Input == IndexPin->Direction && Schema->PC_Byte == IndexPin->PinType.PinCategory);
	CompilerContext.MovePinLinksToIntermediate(*OrgInputPin, *IndexPin);

	if (!IndexPin->LinkedTo.Num())
	{
		//MAKE LITERAL BYTE FROM LITERAL ENUM
		const FString EnumLiteral = IndexPin->GetDefaultAsString();
		const int32 NumericValue = Enum->GetValueByName(*EnumLiteral);
		if (NumericValue == INDEX_NONE) 
		{
			CompilerContext.MessageLog.Error(*FString::Printf(*NSLOCTEXT("K2Node", "GetEnumeratorNam_Error_InvalidName", "@@ has invalid enum value '%s'").ToString(), *EnumLiteral), this);
			return;
		}
		const FString DefaultByteValue = FString::FromInt(NumericValue);

		// LITERAL BYTE FUNCTION
		const FName FunctionName = GET_FUNCTION_NAME_CHECKED(UKismetSystemLibrary, MakeLiteralByte);
		UK2Node_CallFunction* MakeLiteralByte = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph); 
		MakeLiteralByte->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(FunctionName));
		MakeLiteralByte->AllocateDefaultPins();

		UEdGraphPin* MakeLiteralByteReturnPin = MakeLiteralByte->FindPinChecked(Schema->PN_ReturnValue);
		Schema->TryCreateConnection(MakeLiteralByteReturnPin, IndexPin);

		UEdGraphPin* MakeLiteralByteInputPin = MakeLiteralByte->FindPinChecked(TEXT("Value"));
		MakeLiteralByteInputPin->DefaultValue = DefaultByteValue;
	}

	BreakAllNodeLinks();
}

void UK2Node_SpawnActorFromClass::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	static FName BeginSpawningBlueprintFuncName = GET_FUNCTION_NAME_CHECKED(UGameplayStatics, BeginSpawningActorFromClass);
	static FString ActorClassParamName = FString(TEXT("ActorClass"));
	static FString WorldContextParamName = FString(TEXT("WorldContextObject"));

	static FName FinishSpawningFuncName = GET_FUNCTION_NAME_CHECKED(UGameplayStatics, FinishSpawningActor);
	static FString ActorParamName = FString(TEXT("Actor"));
	static FString TransformParamName = FString(TEXT("SpawnTransform"));
	static FString NoCollisionFailParamName = FString(TEXT("bNoCollisionFail"));
	static FString OwnerParamName = FString(TEXT("Owner"));

	static FString ObjectParamName = FString(TEXT("Object"));
	static FString ValueParamName = FString(TEXT("Value"));
	static FString PropertyNameParamName = FString(TEXT("PropertyName"));

	UK2Node_SpawnActorFromClass* SpawnNode = this;
	UEdGraphPin* SpawnNodeExec = SpawnNode->GetExecPin();
	UEdGraphPin* SpawnNodeTransform = SpawnNode->GetSpawnTransformPin();
	UEdGraphPin* SpawnNodeNoCollisionFail = GetNoCollisionFailPin();
	UEdGraphPin* SpawnWorldContextPin = SpawnNode->GetWorldContextPin();
	UEdGraphPin* SpawnClassPin = SpawnNode->GetClassPin();
	UEdGraphPin* SpawnNodeOwnerPin = SpawnNode->GetOwnerPin();
	UEdGraphPin* SpawnNodeThen = SpawnNode->GetThenPin();
	UEdGraphPin* SpawnNodeResult = SpawnNode->GetResultPin();

	UClass* SpawnClass = (SpawnClassPin != NULL) ? Cast<UClass>(SpawnClassPin->DefaultObject) : NULL;
	if((0 == SpawnClassPin->LinkedTo.Num()) && (NULL == SpawnClass))
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("SpawnActorNodeMissingClass_Error", "Spawn node @@ must have a class specified.").ToString(), SpawnNode);
		// we break exec links so this is the only error we get, don't want the SpawnActor node being considered and giving 'unexpected node' type warnings
		SpawnNode->BreakAllNodeLinks();
		return;
	}

	//////////////////////////////////////////////////////////////////////////
	// create 'begin spawn' call node
	UK2Node_CallFunction* CallBeginSpawnNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(SpawnNode, SourceGraph);
	CallBeginSpawnNode->FunctionReference.SetExternalMember(BeginSpawningBlueprintFuncName, UGameplayStatics::StaticClass());
	CallBeginSpawnNode->AllocateDefaultPins();

	UEdGraphPin* CallBeginExec = CallBeginSpawnNode->GetExecPin();
	UEdGraphPin* CallBeginWorldContextPin = CallBeginSpawnNode->FindPinChecked(WorldContextParamName);
	UEdGraphPin* CallBeginActorClassPin = CallBeginSpawnNode->FindPinChecked(ActorClassParamName);
	UEdGraphPin* CallBeginTransform = CallBeginSpawnNode->FindPinChecked(TransformParamName);
	UEdGraphPin* CallBeginNoCollisionFail = CallBeginSpawnNode->FindPinChecked(NoCollisionFailParamName);
	UEdGraphPin* CallBeginOwnerPin = CallBeginSpawnNode->FindPinChecked(FK2Node_SpawnActorFromClassHelper::OwnerPinName);
	UEdGraphPin* CallBeginResult = CallBeginSpawnNode->GetReturnValuePin();	

	// Move 'exec' connection from spawn node to 'begin spawn'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeExec, *CallBeginExec);

	if(SpawnClassPin->LinkedTo.Num() > 0)
	{
		// Copy the 'blueprint' connection from the spawn node to 'begin spawn'
		CompilerContext.MovePinLinksToIntermediate(*SpawnClassPin, *CallBeginActorClassPin);
	}
	else
	{
		// Copy blueprint literal onto begin spawn call 
		CallBeginActorClassPin->DefaultObject = SpawnClass;
	}

	// Copy the world context connection from the spawn node to 'begin spawn' if necessary
	if (SpawnWorldContextPin)
	{
		CompilerContext.MovePinLinksToIntermediate(*SpawnWorldContextPin, *CallBeginWorldContextPin);
	}

	if (SpawnNodeOwnerPin != nullptr)
	{
		CompilerContext.MovePinLinksToIntermediate(*SpawnNodeOwnerPin, *CallBeginOwnerPin);
	}

	// Copy the 'transform' connection from the spawn node to 'begin spawn'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeTransform, *CallBeginTransform);

	// Copy the 'bNoCollisionFail' connection from the spawn node to 'begin spawn'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeNoCollisionFail, *CallBeginNoCollisionFail);

	//////////////////////////////////////////////////////////////////////////
	// create 'finish spawn' call node
	UK2Node_CallFunction* CallFinishSpawnNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(SpawnNode, SourceGraph);
	CallFinishSpawnNode->FunctionReference.SetExternalMember(FinishSpawningFuncName, UGameplayStatics::StaticClass());
	CallFinishSpawnNode->AllocateDefaultPins();

	UEdGraphPin* CallFinishExec = CallFinishSpawnNode->GetExecPin();
	UEdGraphPin* CallFinishThen = CallFinishSpawnNode->GetThenPin();
	UEdGraphPin* CallFinishActor = CallFinishSpawnNode->FindPinChecked(ActorParamName);
	UEdGraphPin* CallFinishTransform = CallFinishSpawnNode->FindPinChecked(TransformParamName);
	UEdGraphPin* CallFinishResult = CallFinishSpawnNode->GetReturnValuePin();

	// Move 'then' connection from spawn node to 'finish spawn'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeThen, *CallFinishThen);

	// Copy transform connection
	CompilerContext.CopyPinLinksToIntermediate(*CallBeginTransform, *CallFinishTransform);

//.........这里部分代码省略.........

//amd this is where magic really happens. This will expand node for our custom object, with properties
//which are set as EditAwnywhere and meta=(ExposeOnSpawn), or equivalent in blueprint.
void UBPNode_CreateItemData::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
	Super::ExpandNode(CompilerContext, SourceGraph);

	//look for static function in BlueprintFunctionLibrary
	//In this class and of this name
	static FName Create_FunctionName = GET_FUNCTION_NAME_CHECKED(UGISBlueprintFunctionLibrary, CreateItem);
	//with these inputs (as a Side note, these should be probabaly FName not FString)
	static FString WorldContextObject_ParamName = FString(TEXT("WorldContextObject"));
	static FString WidgetType_ParamName = FString(TEXT("ItemClass"));
	static FString OwningPlayer_ParamName = FString(TEXT("OwningPlayer"));

	//get pointer to self;
	UBPNode_CreateItemData* CreateItemDataNode = this;
	
	//get pointers to default pins.
	//Exec pins are those big arrows, connected with thick white lines.
	UEdGraphPin* SpawnNodeExec = CreateItemDataNode->GetExecPin();
	//gets world context pin from our static function
	UEdGraphPin* SpawnWorldContextPin = CreateItemDataNode->GetWorldContextPin();
	//the same as above
	UEdGraphPin* SpawnOwningPlayerPin = CreateItemDataNode->GetOwningPlayerPin();
	//get class pin which is used to determine which class to spawn.
	UEdGraphPin* SpawnClassPin = CreateItemDataNode->GetClassPin();
	//then pin is the same as exec pin, just on the other side (the out arrow).
	UEdGraphPin* SpawnNodeThen = CreateItemDataNode->GetThenPin();
	//result pin, which will output our spawned object.
	UEdGraphPin* SpawnNodeResult = CreateItemDataNode->GetResultPin();

	UClass* SpawnClass = (SpawnClassPin != NULL) ? Cast<UClass>(SpawnClassPin->DefaultObject) : NULL;
	if ((0 == SpawnClassPin->LinkedTo.Num()) && (NULL == SpawnClass))
	{
		CompilerContext.MessageLog.Error(*LOCTEXT("CreateItemDAtaNodeMissingClass_Error", "Spawn node @@ must have a class specified.").ToString(), CreateItemDataNode);
		// we break exec links so this is the only error we get, don't want the CreateItemData node being considered and giving 'unexpected node' type warnings
		CreateItemDataNode->BreakAllNodeLinks();
		return;
	}

	//////////////////////////////////////////////////////////////////////////
	// create 'UWidgetBlueprintLibrary::Create' call node
	UK2Node_CallFunction* CallCreateNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(CreateItemDataNode, SourceGraph);
	CallCreateNode->FunctionReference.SetExternalMember(Create_FunctionName, UBPNode_CreateItemData::StaticClass());
	CallCreateNode->AllocateDefaultPins();

	//allocate nodes for created widget.
	UEdGraphPin* CallCreateExec = CallCreateNode->GetExecPin();
	UEdGraphPin* CallCreateWorldContextPin = CallCreateNode->FindPinChecked(WorldContextObject_ParamName);
	UEdGraphPin* CallCreateWidgetTypePin = CallCreateNode->FindPinChecked(WidgetType_ParamName);
	UEdGraphPin* CallCreateOwningPlayerPin = CallCreateNode->FindPinChecked(OwningPlayer_ParamName);
	UEdGraphPin* CallCreateResult = CallCreateNode->GetReturnValuePin();

	// Move 'exec' connection from create widget node to 'UWidgetBlueprintLibrary::Create'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeExec, *CallCreateExec);

	if (SpawnClassPin->LinkedTo.Num() > 0)
	{
		// Copy the 'blueprint' connection from the spawn node to 'UWidgetBlueprintLibrary::Create'
		CompilerContext.MovePinLinksToIntermediate(*SpawnClassPin, *CallCreateWidgetTypePin);
	}
	else
	{
		// Copy blueprint literal onto 'UWidgetBlueprintLibrary::Create' call 
		CallCreateWidgetTypePin->DefaultObject = SpawnClass;
	}

	// Copy the world context connection from the spawn node to 'UWidgetBlueprintLibrary::Create' if necessary
	if (SpawnWorldContextPin)
	{
		CompilerContext.MovePinLinksToIntermediate(*SpawnWorldContextPin, *CallCreateWorldContextPin);
	}

	// Copy the 'Owning Player' connection from the spawn node to 'UWidgetBlueprintLibrary::Create'
	CompilerContext.MovePinLinksToIntermediate(*SpawnOwningPlayerPin, *CallCreateOwningPlayerPin);

	// Move result connection from spawn node to 'UWidgetBlueprintLibrary::Create'
	CallCreateResult->PinType = SpawnNodeResult->PinType; // Copy type so it uses the right actor subclass
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeResult, *CallCreateResult);

	//////////////////////////////////////////////////////////////////////////
	// create 'set var' nodes

	// Get 'result' pin from 'begin spawn', this is the actual actor we want to set properties on
	UEdGraphPin* LastThen = FKismetCompilerUtilities::GenerateAssignmentNodes(CompilerContext, SourceGraph, CallCreateNode, CreateItemDataNode, CallCreateResult, GetClassToSpawn());

	// Move 'then' connection from create widget node to the last 'then'
	CompilerContext.MovePinLinksToIntermediate(*SpawnNodeThen, *LastThen);

	// Break any links to the expanded node
	CreateItemDataNode->BreakAllNodeLinks();
}