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

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 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();
}