/**
* 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
// ------------------------------------------------------------------------------------------
FName ProxyPrespawnFunctionName = validatedActorArraySpawn ? *FK2Node_LatentAbilityCallHelper::BeginSpawnArrayFuncName : *FK2Node_LatentAbilityCallHelper::BeginSpawnFuncName;
UFunction* PreSpawnFunction = ProxyFactoryClass->FindFunctionByName(ProxyPrespawnFunctionName);
FName ProxyPostpawnFunctionName = validatedActorArraySpawn ? *FK2Node_LatentAbilityCallHelper::FinishSpawnArrayFuncName : *FK2Node_LatentAbilityCallHelper::FinishSpawnFuncName;
UFunction* PostSpawnFunction = ProxyFactoryClass->FindFunctionByName(ProxyPostpawnFunctionName);
if (PreSpawnFunction == nullptr)
{
if (validatedActorArraySpawn)
{
CompilerContext.MessageLog.Error(*LOCTEXT("MissingBeginSpawningActorArrayFunction", "AbilityTask: Proxy is missing BeginSpawningActorArray native function. @@").ToString(), this);
}
else
{
CompilerContext.MessageLog.Error(*LOCTEXT("MissingBeginSpawningActorFunction", "AbilityTask: Proxy is missing BeginSpawningActor native function. @@").ToString(), this);
}
return;
}
if (PostSpawnFunction == nullptr)
{
if (validatedActorArraySpawn)
{
CompilerContext.MessageLog.Error(*LOCTEXT("MissingFinishSpawningActorArrayFunction", "AbilityTask: Proxy is missing FinishSpawningActorArray native function. @@").ToString(), this);
}
else
{
CompilerContext.MessageLog.Error(*LOCTEXT("MissingFinishSpawningActorFunction", "AbilityTask: Proxy is missing FinishSpawningActor native function. @@").ToString(), this);
}
return;
}
UK2Node_CallFunction* const CallPrespawnProxyObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
CallPrespawnProxyObjectNode->FunctionReference.SetExternalMember(ProxyPrespawnFunctionName, ProxyClass);
CallPrespawnProxyObjectNode->AllocateDefaultPins();
// Hook up the self connection
UEdGraphPin* PrespawnCallSelfPin = Schema->FindSelfPin(*CallPrespawnProxyObjectNode, EGPD_Input);
check(PrespawnCallSelfPin);
bIsErrorFree &= Schema->TryCreateConnection(ProxyObjectPin, PrespawnCallSelfPin);
// Hook up input parameters to PreSpawn
for (auto CurrentPin : Pins)
{
if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Input, Schema))
{
UEdGraphPin* DestPin = CallPrespawnProxyObjectNode->FindPin(CurrentPin->PinName);
if (DestPin)
{
bIsErrorFree &= CompilerContext.CopyPinLinksToIntermediate(*CurrentPin, *DestPin).CanSafeConnect();
}
}
}
// Hook the activate node up in the exec chain
UEdGraphPin* PrespawnExecPin = CallPrespawnProxyObjectNode->FindPinChecked(Schema->PN_Execute);
UEdGraphPin* PrespawnThenPin = CallPrespawnProxyObjectNode->FindPinChecked(Schema->PN_Then);
UEdGraphPin* PrespawnReturnPin = CallPrespawnProxyObjectNode->FindPinChecked(Schema->PN_ReturnValue);
UEdGraphPin* SpawnedActorReturnPin = CallPrespawnProxyObjectNode->FindPinChecked(FK2Node_LatentAbilityCallHelper::SpawnedActorPinName);
bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, PrespawnExecPin);
LastThenPin = PrespawnThenPin;
// -------------------------------------------
// Branch based on return value of Prespawn
// -------------------------------------------
UK2Node_IfThenElse* BranchNode = SourceGraph->CreateBlankNode<UK2Node_IfThenElse>();
BranchNode->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(BranchNode, this);
// Link return value of prespawn with the branch condtional
bIsErrorFree &= Schema->TryCreateConnection(PrespawnReturnPin, BranchNode->GetConditionPin());
// Link our Prespawn call to the branch node
bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, BranchNode->GetExecPin());
UEdGraphPin* BranchElsePin = BranchNode->GetElsePin();
LastThenPin = BranchNode->GetThenPin();
UClass* ClassToSpawn = GetClassToSpawn();
if (validatedActorArraySpawn && ClassToSpawn)
{
//Branch for main loop control
UK2Node_IfThenElse* Branch = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(this, SourceGraph);
Branch->AllocateDefaultPins();
//Create int Iterator
UK2Node_TemporaryVariable* IteratorVar = CompilerContext.SpawnIntermediateNode<UK2Node_TemporaryVariable>(this, SourceGraph);
IteratorVar->VariableType.PinCategory = Schema->PC_Int;
IteratorVar->AllocateDefaultPins();
//Iterator assignment (initialization to zero)
UK2Node_AssignmentStatement* IteratorInitialize = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(this, SourceGraph);
IteratorInitialize->AllocateDefaultPins();
IteratorInitialize->GetValuePin()->DefaultValue = TEXT("0");
//Iterator assignment (incrementing)
UK2Node_AssignmentStatement* IteratorAssign = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(this, SourceGraph);
IteratorAssign->AllocateDefaultPins();
//Increment iterator command
UK2Node_CallFunction* Increment = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
Increment->SetFromFunction(UKismetMathLibrary::StaticClass()->FindFunctionByName(TEXT("Add_IntInt")));
Increment->AllocateDefaultPins();
Increment->FindPinChecked(TEXT("B"))->DefaultValue = TEXT("1");
//Array length
UK2Node_CallArrayFunction* ArrayLength = CompilerContext.SpawnIntermediateNode<UK2Node_CallArrayFunction>(this, SourceGraph);
ArrayLength->SetFromFunction(UKismetArrayLibrary::StaticClass()->FindFunctionByName(TEXT("Array_Length")));
ArrayLength->AllocateDefaultPins();
//Array element retrieval
UK2Node_CallArrayFunction* GetElement = CompilerContext.SpawnIntermediateNode<UK2Node_CallArrayFunction>(this, SourceGraph);
GetElement->SetFromFunction(UKismetArrayLibrary::StaticClass()->FindFunctionByName(TEXT("Array_Get")));
GetElement->AllocateDefaultPins();
//Check node for iterator versus array length
UK2Node_CallFunction* Condition = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
Condition->SetFromFunction(UKismetMathLibrary::StaticClass()->FindFunctionByName(TEXT("Less_IntInt")));
Condition->AllocateDefaultPins();
//Connections to set up the loop
UEdGraphSchema_K2 const* const K2Schema = Cast<const UEdGraphSchema_K2>(Schema);
bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, IteratorInitialize->GetExecPin());
bIsErrorFree &= Schema->TryCreateConnection(IteratorVar->GetVariablePin(), IteratorInitialize->GetVariablePin());
bIsErrorFree &= Schema->TryCreateConnection(IteratorInitialize->GetThenPin(), Branch->GetExecPin());
bIsErrorFree &= Schema->TryCreateConnection(SpawnedActorReturnPin, ArrayLength->GetTargetArrayPin());
bIsErrorFree &= Schema->TryCreateConnection(Condition->GetReturnValuePin(), Branch->GetConditionPin());
bIsErrorFree &= Schema->TryCreateConnection(IteratorVar->GetVariablePin(), Condition->FindPinChecked(TEXT("A")));
bIsErrorFree &= Schema->TryCreateConnection(ArrayLength->FindPin(K2Schema->PN_ReturnValue), Condition->FindPinChecked(TEXT("B")));
//Connections to establish loop iteration
bIsErrorFree &= Schema->TryCreateConnection(IteratorVar->GetVariablePin(), Increment->FindPinChecked(TEXT("A")));
bIsErrorFree &= Schema->TryCreateConnection(IteratorVar->GetVariablePin(), IteratorAssign->GetVariablePin());
bIsErrorFree &= Schema->TryCreateConnection(Increment->GetReturnValuePin(), IteratorAssign->GetValuePin());
bIsErrorFree &= Schema->TryCreateConnection(IteratorAssign->GetThenPin(), Branch->GetExecPin());
//This is the inner loop
LastThenPin = Branch->GetThenPin(); //Connect the loop branch to the spawn-assignment code block
bIsErrorFree &= Schema->TryCreateConnection(SpawnedActorReturnPin, GetElement->GetTargetArrayPin());
bIsErrorFree &= Schema->TryCreateConnection(IteratorVar->GetVariablePin(), GetElement->FindPinChecked(K2Schema->PN_Index));
bIsErrorFree &= ConnectSpawnProperties(ClassToSpawn, Schema, CompilerContext, SourceGraph, LastThenPin, GetElement->FindPinChecked(K2Schema->PN_Item)); //Last argument is the array element
bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, IteratorAssign->GetExecPin()); //Connect the spawn-assignment code block to the iterator increment
//Finish by providing the proper path out
LastThenPin = Branch->GetElsePin();
}
// -------------------------------------------
// Set spawn variables
// Borrowed heavily from FKismetCompilerUtilities::GenerateAssignmentNodes
// -------------------------------------------
if (validatedActorSpawn && ClassToSpawn)
{
bIsErrorFree &= ConnectSpawnProperties(ClassToSpawn, Schema, CompilerContext, SourceGraph, LastThenPin, SpawnedActorReturnPin);
}
// -------------------------------------------
// Call FinishSpawning
// -------------------------------------------
UK2Node_CallFunction* const CallPostSpawnnProxyObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
CallPostSpawnnProxyObjectNode->FunctionReference.SetExternalMember(ProxyPostpawnFunctionName, ProxyClass);
CallPostSpawnnProxyObjectNode->AllocateDefaultPins();
// Hook up the self connection
UEdGraphPin* PostspawnCallSelfPin = Schema->FindSelfPin(*CallPostSpawnnProxyObjectNode, EGPD_Input);
check(PostspawnCallSelfPin);
bIsErrorFree &= Schema->TryCreateConnection(ProxyObjectPin, PostspawnCallSelfPin);
// Link our Postspawn call in
bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, CallPostSpawnnProxyObjectNode->FindPinChecked(Schema->PN_Execute));
// Hook up any other input parameters to PostSpawn
for (auto CurrentPin : Pins)
{
if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Input, Schema))
{
UEdGraphPin* DestPin = CallPostSpawnnProxyObjectNode->FindPin(CurrentPin->PinName);
if (DestPin)
{
bIsErrorFree &= CompilerContext.CopyPinLinksToIntermediate(*CurrentPin, *DestPin).CanSafeConnect();
}
}
}
UEdGraphPin* InSpawnedActorPin = CallPostSpawnnProxyObjectNode->FindPin(TEXT("SpawnedActor"));
if (InSpawnedActorPin == nullptr)
{
CompilerContext.MessageLog.Error(*LOCTEXT("MissingSpawnedActorInputPin", "AbilityTask: Proxy is missing SpawnedActor input pin in FinishSpawningActor. @@").ToString(), this);
return;
}
bIsErrorFree &= Schema->TryCreateConnection(SpawnedActorReturnPin, InSpawnedActorPin);
LastThenPin = CallPostSpawnnProxyObjectNode->FindPinChecked(Schema->PN_Then);
// Move the connections from the original node then pin to the last internal then pin
bIsErrorFree &= CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(Schema->PN_Then), *LastThenPin).CanSafeConnect();
bIsErrorFree &= CompilerContext.CopyPinLinksToIntermediate(*LastThenPin, *BranchElsePin).CanSafeConnect();
if (!bIsErrorFree)
{
CompilerContext.MessageLog.Error(*LOCTEXT("InternalConnectionError", "BaseAsyncTask: Internal connection error. @@").ToString(), this);
}
// Make sure we caught everything
BreakAllNodeLinks();
}
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_VariableGet::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
Super::ExpandNode(CompilerContext, SourceGraph);
// Do not attempt to expand the node when not a pure get nor when there is no property. Normal compilation error detection will detect the missing property.
if (!bIsPureGet && GetPropertyForVariable() != nullptr)
{
const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
UEdGraphPin* ValuePin = GetValuePin();
// Impure Get nodes convert into three nodes:
// 1. A pure Get node
// 2. An IsValid node
// 3. A Branch node (only impure part
// Create the impure Get node
UK2Node_VariableGet* VariableGetNode = CompilerContext.SpawnIntermediateNode<UK2Node_VariableGet>(this, SourceGraph);
VariableGetNode->VariableReference = VariableReference;
VariableGetNode->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(VariableGetNode, this);
// Move pin links from Get node we are expanding, to the new pure one we've created
CompilerContext.MovePinLinksToIntermediate(*ValuePin, *VariableGetNode->GetValuePin());
if (!VariableReference.IsLocalScope())
{
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Self), *VariableGetNode->FindPin(Schema->PN_Self));
}
// Create the IsValid node
UK2Node_CallFunction* IsValidFunction = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
// Based on if the type is an "Object" or a "Class" changes which function to use
if (ValuePin->PinType.PinCategory == UObject::StaticClass()->GetName())
{
IsValidFunction->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(GET_MEMBER_NAME_CHECKED(UKismetSystemLibrary, IsValid)));
}
else if (ValuePin->PinType.PinCategory == UClass::StaticClass()->GetName())
{
IsValidFunction->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(GET_MEMBER_NAME_CHECKED(UKismetSystemLibrary, IsValidClass)));
}
IsValidFunction->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(IsValidFunction, this);
// Connect the value pin from the new Get node to the IsValid
UEdGraphPin* ObjectPin = IsValidFunction->Pins[1];
check(ObjectPin->Direction == EGPD_Input);
ObjectPin->MakeLinkTo(VariableGetNode->GetValuePin());
// Create the Branch node
UK2Node_IfThenElse* BranchNode = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(this, SourceGraph);
BranchNode->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(BranchNode, this);
// Connect the bool output pin from IsValid node to the Branch node
UEdGraphPin* BoolPin = IsValidFunction->Pins[2];
check(BoolPin->Direction == EGPD_Output);
BoolPin->MakeLinkTo(BranchNode->GetConditionPin());
// Connect the Branch node to the input of the impure Get node
CompilerContext.MovePinLinksToIntermediate(*GetExecPin(), *BranchNode->GetExecPin());
// Move the two Branch pins to the Branch node
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Then), *BranchNode->FindPin(Schema->PN_Then));
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Else), *BranchNode->FindPin(Schema->PN_Else));
BreakAllNodeLinks();
}
}
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;
EventNode->bInternalEvent = true;
EventNode->AllocateDefaultPins();
// Cache these out because we'll connect the sequence to it
UEdGraphPin *EventThenPin = EventNode->FindPinChecked( Schema->PN_Then );
UEdGraphPin *EventDeltaPin = EventNode->FindPinChecked( FString(TEXT("Delta")) );
UEdGraphPin *EventMidiValuePin = EventNode->FindPinChecked( FString(TEXT("MidiValue")) );
UEdGraphPin *EventControlTypePin = EventNode->FindPinChecked( FString(TEXT("ControlType")) );
//
// Check if Blueprint is NULL
//
UEdGraphPin *CompareBlueprintToNullBranchThenPin = NULL;
{
UK2Node_CallFunction *CompareBlueprintToNullNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
CompareBlueprintToNullNode->FunctionReference.SetExternalMember( TEXT("NotEqual_ObjectObject"), UKismetMathLibrary::StaticClass() );
CompareBlueprintToNullNode->AllocateDefaultPins();
//Set A Pin to the Blueprint Pin
UEdGraphPin *CompareBlueprintToNullAPin = CompareBlueprintToNullNode->FindPinChecked( FString(TEXT("A")) );
CompilerContext.CopyPinLinksToIntermediate( *SourceBlueprintPin, *CompareBlueprintToNullAPin);
// hook for Compare Blueprint to NULL result
UEdGraphPin *CompareBlueprintToNullResultPin = CompareBlueprintToNullNode->GetReturnValuePin();
// Create the BRANCH that will drive the comparison
UK2Node_IfThenElse* CompareBlueprintToNullBranchNode = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(this, SourceGraph);
CompareBlueprintToNullBranchNode->AllocateDefaultPins();
//hook up the condition
CompareBlueprintToNullResultPin->MakeLinkTo( CompareBlueprintToNullBranchNode->GetConditionPin() );
//hook event to the branck input
EventThenPin->MakeLinkTo( CompareBlueprintToNullBranchNode->GetExecPin() );
//cache ot the THEN pin for later linkup
CompareBlueprintToNullBranchThenPin = CompareBlueprintToNullBranchNode->GetThenPin();
}
//
// Get Class Default Object
//
UK2Node_CallFunction *GetClassDefaultObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
GetClassDefaultObjectNode->FunctionReference.SetExternalMember( TEXT("GetBlueprintClassDefaultObject"), ULiveEditorKismetLibrary::StaticClass() );
GetClassDefaultObjectNode->AllocateDefaultPins();
UEdGraphPin *GetClassDefaultObjectBlueprintPin = GetClassDefaultObjectNode->FindPinChecked( TEXT("Blueprint") );
CompilerContext.CopyPinLinksToIntermediate( *SourceBlueprintPin, *GetClassDefaultObjectBlueprintPin);
//hook for later -> the pointer to the ClassDefaultObject of our BlueprintPin
UEdGraphPin *GetClassDefaultObjectResultPin = GetClassDefaultObjectNode->GetReturnValuePin();
//
// Compare to BaseClass to make sure that the target Blueprint IsA(BaseClass)
//
UEdGraphPin *ClassIsChildOfBranchThenPin = NULL;
{
//
//we need to get the class of the Blueprint pin
UK2Node_CallFunction *GetClassNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
GetClassNode->FunctionReference.SetExternalMember( TEXT("GetObjectClass"), UGameplayStatics::StaticClass() );
GetClassNode->AllocateDefaultPins();
//Pin in the GetClassDefaultObjectResultPin to the Object Parameter of the GetObjectClass FUNCTION
//we want to make sure that the Class of the DEFAULT_OBJECT IsA( BaseClass )
UEdGraphPin *GetClassObjectPin = GetClassNode->FindPinChecked( FString(TEXT("Object")) );
GetClassDefaultObjectResultPin->MakeLinkTo( GetClassObjectPin );
//hook for the Class result
UEdGraphPin *GetClassReturnValuePin = GetClassNode->GetReturnValuePin();
//
//the ClassIsChildOf FUNCTION
UK2Node_CallFunction *ClassIsChildOfNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
ClassIsChildOfNode->FunctionReference.SetExternalMember( TEXT("ClassIsChildOf"), UKismetMathLibrary::StaticClass() );
ClassIsChildOfNode->AllocateDefaultPins();
//hook up the test pin
UEdGraphPin *ClassIsChildOfTestPin = ClassIsChildOfNode->FindPinChecked( FString(TEXT("TestClass")) );
GetClassReturnValuePin->MakeLinkTo( ClassIsChildOfTestPin );
//copy our BaseClass Pin into the ClassIsChildOf Parameter
UEdGraphPin *ClassIsChildOfParentPin = ClassIsChildOfNode->FindPinChecked( FString(TEXT("ParentClass")) );
CompilerContext.CopyPinLinksToIntermediate( *SourceBaseClassPin, *ClassIsChildOfParentPin);
//hook for return value
UEdGraphPin *ClassIsChildOfResultPin = ClassIsChildOfNode->GetReturnValuePin();
//
// Create the BRANCH that will drive the comparison
UK2Node_IfThenElse* ClassIsChildOfBranchNode = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(this, SourceGraph);
ClassIsChildOfBranchNode->AllocateDefaultPins();
//hook up the previous branch to this one
check( CompareBlueprintToNullBranchThenPin != NULL );
CompareBlueprintToNullBranchThenPin->MakeLinkTo( ClassIsChildOfBranchNode->GetExecPin() );
//hook up our condition
ClassIsChildOfResultPin->MakeLinkTo( ClassIsChildOfBranchNode->GetConditionPin() );
//cache ot the THEN pin for later linkup
ClassIsChildOfBranchThenPin = ClassIsChildOfBranchNode->GetThenPin();
}
//
//The set variable function (to set LiveEdited new value)
//
UK2Node_CallFunction *ModifyVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
ModifyVarNode->FunctionReference.SetExternalMember( TEXT("ModifyPropertyByName"), ULiveEditorKismetLibrary::StaticClass() );
ModifyVarNode->AllocateDefaultPins();
// Make link from the event to the Set variable node
UEdGraphPin *ModifyVarExecPin = ModifyVarNode->GetExecPin();
ClassIsChildOfBranchThenPin->MakeLinkTo( ModifyVarExecPin );
//link up the Target Pin
UEdGraphPin *ModifyVarNodeTargetPin = ModifyVarNode->FindPinChecked( TEXT("Target") );
GetClassDefaultObjectResultPin->MakeLinkTo( ModifyVarNodeTargetPin );
//link up the PropertyName Pin
UEdGraphPin *ModifyVarNodePropertyNamePin = ModifyVarNode->FindPinChecked( TEXT("PropertyName") );
ModifyVarNodePropertyNamePin->DefaultValue = SourceVariablePin->DefaultValue;
//link up the MIDI Value Pin
UEdGraphPin *ModifyVarNodeMidiValuePin = ModifyVarNode->FindPinChecked( TEXT("MidiValue") );
EventMidiValuePin->MakeLinkTo(ModifyVarNodeMidiValuePin);
//link up the ControlType Pin
UEdGraphPin *ModifyVarNodeControlTypePin = ModifyVarNode->FindPinChecked( TEXT("ControlType") );
EventControlTypePin->MakeLinkTo(ModifyVarNodeControlTypePin);
//hook for the Delta Pin
UEdGraphPin *ModifyVarNodeDeltaPin = ModifyVarNode->FindPinChecked( TEXT("Delta") );
//Clamping
if ( ShouldClampPin->DefaultValue == FString(TEXT("true")) )
{
UEdGraphPin *ModifyVarNodeShouldClampPin = ModifyVarNode->FindPinChecked( TEXT("bShouldClamp") );
CompilerContext.CopyPinLinksToIntermediate( *ShouldClampPin, *ModifyVarNodeShouldClampPin);
check( ClampMinPin != NULL );
UEdGraphPin *ModifyVarNodeClampMinPin = ModifyVarNode->FindPinChecked( TEXT("ClampMin") );
CompilerContext.CopyPinLinksToIntermediate( *ClampMinPin, *ModifyVarNodeClampMinPin);
check( ClampMaxPin != NULL );
UEdGraphPin *ModifyVarNodeClampMaxPin = ModifyVarNode->FindPinChecked( TEXT("ClampMax") );
CompilerContext.CopyPinLinksToIntermediate( *ClampMaxPin, *ModifyVarNodeClampMaxPin);
}
//hook for ModifyVar THEN
UEdGraphPin *ModifyVarNodeThenPin = ModifyVarNode->GetThenPin();
//
// The Multiply Delta * DeltaMult function
//
UK2Node_CallFunction *MultiplyNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
MultiplyNode->FunctionReference.SetExternalMember( TEXT("Multiply_FloatFloat"), UKismetMathLibrary::StaticClass() );
MultiplyNode->AllocateDefaultPins();
//cache this out. it will be linked to from the output of the (int)Delta -> (float)Delta Conversion function
UEdGraphPin *MultiplyNodeFirstPin = MultiplyNode->FindPinChecked( FString(TEXT("A")) );
// 2nd input to the Add function comes from the Current variable value
UEdGraphPin *MultiplyNodeSecondPin = MultiplyNode->FindPinChecked( FString(TEXT("B")) );
CompilerContext.CopyPinLinksToIntermediate( *DeltaMultPin, *MultiplyNodeSecondPin);
UEdGraphPin *MultiplyNodeReturnValuePin = MultiplyNode->GetReturnValuePin();
MultiplyNodeReturnValuePin->MakeLinkTo( ModifyVarNodeDeltaPin );
//
// The Convert function to go from (int)Delta to ULiveEditorKismetLibrary::ModifyPropertyByName(... float Delta ...)
//
FName ConvertFunctionName;
bool success = Schema->SearchForAutocastFunction( EventDeltaPin, MultiplyNodeFirstPin, ConvertFunctionName );
check( success );
UK2Node_CallFunction *ConvertDeltaNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
ConvertDeltaNode->FunctionReference.SetExternalMember( ConvertFunctionName, UKismetMathLibrary::StaticClass() );
ConvertDeltaNode->AllocateDefaultPins();
FName PinName;
success = UK2Node_LiveEditObjectStatics::SearchForConvertPinName( Schema, EventDeltaPin, PinName );
check( success );
UEdGraphPin *ConvertDeltaInputPin = ConvertDeltaNode->FindPinChecked( PinName.ToString() );
EventDeltaPin->MakeLinkTo( ConvertDeltaInputPin );
UEdGraphPin *ConvertDeltaOutputPin = ConvertDeltaNode->GetReturnValuePin();
ConvertDeltaOutputPin->MakeLinkTo( MultiplyNodeFirstPin );
//
// TODO - markDirty
//
//
// send out the object value updates
//
UK2Node_CallFunction *ReplicationNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this,SourceGraph);
ReplicationNode->FunctionReference.SetExternalMember( TEXT("ReplicateChangesToChildren"), ULiveEditorKismetLibrary::StaticClass() );
ReplicationNode->AllocateDefaultPins();
UEdGraphPin *ReplicationNodeVarNamePin = ReplicationNode->FindPinChecked( TEXT("PropertyName") );
ReplicationNodeVarNamePin->DefaultValue = SourceVariablePin->DefaultValue;
UEdGraphPin *ReplicationNodeArchetypePin = ReplicationNode->FindPinChecked( FString(TEXT("Archetype")) );
GetClassDefaultObjectResultPin->MakeLinkTo( ReplicationNodeArchetypePin );
UEdGraphPin *ReplicationNodeExecPin = ReplicationNode->GetExecPin();
ModifyVarNodeThenPin->MakeLinkTo( ReplicationNodeExecPin );
UEdGraphPin *ReplicationNodeThenPin = ReplicationNode->FindPinChecked( FString(TEXT("then")) );
//
// Finally, activate our OnMidiInput pin
//
CompilerContext.CopyPinLinksToIntermediate( *SourceOnMidiInputPin, *ReplicationNodeThenPin);
}
// Break any links to the expanded node
BreakAllNodeLinks();
}
