bool FKismetConnectionDrawingPolicy::CanBuildRoadmap() const
{
UBlueprint* TargetBP = FBlueprintEditorUtils::FindBlueprintForGraphChecked(GraphObj);
UObject* ActiveObject = TargetBP->GetObjectBeingDebugged();
return ActiveObject != NULL;
}
void FBlueprintCompileReinstancer::ReplaceInstancesOfClass(UClass* OldClass, UClass* NewClass, UObject* OriginalCDO, TSet<UObject*>* ObjectsThatShouldUseOldStuff)
{
USelection* SelectedActors;
bool bSelectionChanged = false;
TArray<UObject*> ObjectsToReplace;
const bool bLogConversions = false; // for debugging
// Map of old objects to new objects
TMap<UObject*, UObject*> OldToNewInstanceMap;
TMap<UClass*, UClass*> OldToNewClassMap;
OldToNewClassMap.Add(OldClass, NewClass);
TMap<FStringAssetReference, UObject*> ReinstancedObjectsWeakReferenceMap;
// actors being replace
TArray<FActorReplacementHelper> ReplacementActors;
// A list of objects (e.g. Blueprints) that potentially have editors open that we need to refresh
TArray<UObject*> PotentialEditorsForRefreshing;
// A list of component owners that need their construction scripts re-ran (because a component of theirs has been reinstanced)
TSet<AActor*> OwnersToReconstruct;
// Set global flag to let system know we are reconstructing blueprint instances
TGuardValue<bool> GuardTemplateNameFlag(GIsReconstructingBlueprintInstances, true);
struct FObjectRemappingHelper
{
void OnObjectsReplaced(const TMap<UObject*, UObject*>& InReplacedObjects)
{
ReplacedObjects.Append(InReplacedObjects);
}
TMap<UObject*, UObject*> ReplacedObjects;
} ObjectRemappingHelper;
FDelegateHandle OnObjectsReplacedHandle = GEditor->OnObjectsReplaced().AddRaw(&ObjectRemappingHelper,&FObjectRemappingHelper::OnObjectsReplaced);
{ BP_SCOPED_COMPILER_EVENT_STAT(EKismetReinstancerStats_ReplaceInstancesOfClass);
const bool bIncludeDerivedClasses = false;
GetObjectsOfClass(OldClass, ObjectsToReplace, bIncludeDerivedClasses);
SelectedActors = GEditor->GetSelectedActors();
SelectedActors->BeginBatchSelectOperation();
SelectedActors->Modify();
// Then fix 'real' (non archetype) instances of the class
for (UObject* OldObject : ObjectsToReplace)
{
// Skip non-archetype instances, EXCEPT for component templates
const bool bIsComponent = NewClass->IsChildOf(UActorComponent::StaticClass());
if ((!bIsComponent && OldObject->IsTemplate()) || OldObject->IsPendingKill())
{
continue;
}
UBlueprint* CorrespondingBlueprint = Cast<UBlueprint>(OldObject->GetClass()->ClassGeneratedBy);
UObject* OldBlueprintDebugObject = nullptr;
// If this object is being debugged, cache it off so we can preserve the 'object being debugged' association
if ((CorrespondingBlueprint != nullptr) && (CorrespondingBlueprint->GetObjectBeingDebugged() == OldObject))
{
OldBlueprintDebugObject = OldObject;
}
AActor* OldActor = Cast<AActor>(OldObject);
UObject* NewUObject = nullptr;
// if the object to replace is an actor...
if (OldActor != nullptr)
{
FVector Location = FVector::ZeroVector;
FRotator Rotation = FRotator::ZeroRotator;
if (USceneComponent* OldRootComponent = OldActor->GetRootComponent())
{
Location = OldActor->GetActorLocation();
Rotation = OldActor->GetActorRotation();
}
// If this actor was spawned from an Archetype, we spawn the new actor from the new version of that archetype
UObject* OldArchetype = OldActor->GetArchetype();
UWorld* World = OldActor->GetWorld();
AActor* NewArchetype = Cast<AActor>(OldToNewInstanceMap.FindRef(OldArchetype));
// Check that either this was an instance of the class directly, or we found a new archetype for it
check(OldArchetype == OldClass->GetDefaultObject() || NewArchetype);
// Spawn the new actor instance, in the same level as the original, but deferring running the construction script until we have transferred modified properties
ULevel* ActorLevel = OldActor->GetLevel();
UClass** MappedClass = OldToNewClassMap.Find(OldActor->GetClass());
UClass* SpawnClass = MappedClass ? *MappedClass : NewClass;
FActorSpawnParameters SpawnInfo;
SpawnInfo.OverrideLevel = ActorLevel;
SpawnInfo.Template = NewArchetype;
SpawnInfo.bNoCollisionFail = true;
SpawnInfo.bDeferConstruction = true;
// Temporarily remove the deprecated flag so we can respawn the Blueprint in the level
const bool bIsClassDeprecated = SpawnClass->HasAnyClassFlags(CLASS_Deprecated);
SpawnClass->ClassFlags &= ~CLASS_Deprecated;
AActor* NewActor = World->SpawnActor(SpawnClass, &Location, &Rotation, SpawnInfo);
// Reassign the deprecated flag if it was previously assigned
if (bIsClassDeprecated)
{
SpawnClass->ClassFlags |= CLASS_Deprecated;
}
check(NewActor != nullptr);
NewUObject = NewActor;
// store the new actor for the second pass (NOTE: this detaches
// OldActor from all child/parent attachments)
//
// running the NewActor's construction-script is saved for that
// second pass (because the construction-script may reference
// another instance that hasn't been replaced yet).
ReplacementActors.Add(FActorReplacementHelper(NewActor, OldActor));
ReinstancedObjectsWeakReferenceMap.Add(OldObject, NewUObject);
OldActor->DestroyConstructedComponents(); // don't want to serialize components from the old actor
// Unregister native components so we don't copy any sub-components they generate for themselves (like UCameraComponent does)
OldActor->UnregisterAllComponents();
// Unregister any native components, might have cached state based on properties we are going to overwrite
NewActor->UnregisterAllComponents();
UEditorEngine::CopyPropertiesForUnrelatedObjects(OldActor, NewActor);
// reset properties/streams
NewActor->ResetPropertiesForConstruction();
// register native components
NewActor->RegisterAllComponents();
//
// clean up the old actor (unselect it, remove it from the world, etc.)...
if (OldActor->IsSelected())
{
GEditor->SelectActor(OldActor, /*bInSelected =*/false, /*bNotify =*/false);
bSelectionChanged = true;
}
if (GEditor->Layers.IsValid()) // ensure(NULL != GEditor->Layers) ?? While cooking the Layers is NULL.
{
GEditor->Layers->DisassociateActorFromLayers(OldActor);
}
World->EditorDestroyActor(OldActor, /*bShouldModifyLevel =*/true);
OldToNewInstanceMap.Add(OldActor, NewActor);
}
else
{
FName OldName(OldObject->GetFName());
OldObject->Rename(NULL, OldObject->GetOuter(), REN_DoNotDirty | REN_DontCreateRedirectors);
NewUObject = NewObject<UObject>(OldObject->GetOuter(), NewClass, OldName);
check(NewUObject != nullptr);
UEditorEngine::CopyPropertiesForUnrelatedObjects(OldObject, NewUObject);
if (UAnimInstance* AnimTree = Cast<UAnimInstance>(NewUObject))
{
// Initialising the anim instance isn't enough to correctly set up the skeletal mesh again in a
// paused world, need to initialise the skeletal mesh component that contains the anim instance.
if (USkeletalMeshComponent* SkelComponent = Cast<USkeletalMeshComponent>(AnimTree->GetOuter()))
{
SkelComponent->InitAnim(true);
}
}
OldObject->RemoveFromRoot();
OldObject->MarkPendingKill();
OldToNewInstanceMap.Add(OldObject, NewUObject);
if (bIsComponent)
{
UActorComponent* Component = Cast<UActorComponent>(NewUObject);
AActor* OwningActor = Component->GetOwner();
if (OwningActor)
{
OwningActor->ResetOwnedComponents();
// Check to see if they have an editor that potentially needs to be refreshed
if (OwningActor->GetClass()->ClassGeneratedBy)
{
PotentialEditorsForRefreshing.AddUnique(OwningActor->GetClass()->ClassGeneratedBy);
}
// we need to keep track of actor instances that need
// their construction scripts re-ran (since we've just
// replaced a component they own)
OwnersToReconstruct.Add(OwningActor);
}
}
}
// If this original object came from a blueprint and it was in the selected debug set, change the debugging to the new object.
if ((CorrespondingBlueprint) && (OldBlueprintDebugObject) && (NewUObject))
{
CorrespondingBlueprint->SetObjectBeingDebugged(NewUObject);
}
if (bLogConversions)
{
UE_LOG(LogBlueprint, Log, TEXT("Converted instance '%s' to '%s'"), *OldObject->GetPathName(), *NewUObject->GetPathName());
}
}
}
GEditor->OnObjectsReplaced().Remove(OnObjectsReplacedHandle);
// Now replace any pointers to the old archetypes/instances with pointers to the new one
TArray<UObject*> SourceObjects;
TArray<UObject*> DstObjects;
OldToNewInstanceMap.GenerateKeyArray(SourceObjects);
OldToNewInstanceMap.GenerateValueArray(DstObjects); // Also look for references in new spawned objects.
SourceObjects.Append(DstObjects);
FReplaceReferenceHelper::IncludeCDO(OldClass, NewClass, OldToNewInstanceMap, SourceObjects, OriginalCDO);
FReplaceReferenceHelper::FindAndReplaceReferences(SourceObjects, ObjectsThatShouldUseOldStuff, ObjectsToReplace, OldToNewInstanceMap, ReinstancedObjectsWeakReferenceMap);
{ BP_SCOPED_COMPILER_EVENT_STAT(EKismetReinstancerStats_ReplacementConstruction);
// the process of setting up new replacement actors is split into two
// steps (this here, is the second)...
//
// the "finalization" here runs the replacement actor's construction-
// script and is left until late to account for a scenario where the
// construction-script attempts to modify another instance of the
// same class... if this were to happen above, in the ObjectsToReplace
// loop, then accessing that other instance would cause an assert in
// UProperty::ContainerPtrToValuePtrInternal() (which appropriatly
// complains that the other instance's type doesn't match because it
// hasn't been replaced yet... that's why we wait until after
// FArchiveReplaceObjectRef to run construction-scripts).
for (FActorReplacementHelper& ReplacementActor : ReplacementActors)
{
ReplacementActor.Finalize(ObjectRemappingHelper.ReplacedObjects);
}
}
SelectedActors->EndBatchSelectOperation();
if (bSelectionChanged)
{
GEditor->NoteSelectionChange();
}
if (GEditor)
{
// Refresh any editors for objects that we've updated components for
for (auto BlueprintAsset : PotentialEditorsForRefreshing)
{
FBlueprintEditor* BlueprintEditor = static_cast<FBlueprintEditor*>(FAssetEditorManager::Get().FindEditorForAsset(BlueprintAsset, /*bFocusIfOpen =*/false));
if (BlueprintEditor)
{
BlueprintEditor->RefreshEditors();
}
}
}
// in the case where we're replacing component instances, we need to make
// sure to re-run their owner's construction scripts
for (AActor* ActorInstance : OwnersToReconstruct)
{
ActorInstance->RerunConstructionScripts();
}
}
void UK2Node::GetPinHoverText(const UEdGraphPin& Pin, FString& HoverTextOut) const
{
// start with the default hover text (from the pin's tool-tip)
Super::GetPinHoverText(Pin, HoverTextOut);
// if the Pin wasn't initialized with a tool-tip of its own
if (HoverTextOut.IsEmpty())
{
UEdGraphSchema const* Schema = GetSchema();
check(Schema != NULL);
Schema->ConstructBasicPinTooltip(Pin, FText::GetEmpty(), HoverTextOut);
}
UBlueprint* Blueprint = FBlueprintEditorUtils::FindBlueprintForNodeChecked(this);
check(Blueprint != NULL);
// If this resides in an intermediate graph, show the UObject name for debug purposes
if(Blueprint->IntermediateGeneratedGraphs.Contains(GetGraph()))
{
HoverTextOut = FString::Printf(TEXT("%s\n\n%s"), *Pin.GetName(), *HoverTextOut);
}
UObject* ActiveObject = Blueprint->GetObjectBeingDebugged();
// if there is no object being debugged, then we don't need to tack on any of the following data
if (ActiveObject == NULL)
{
return;
}
// Switch the blueprint to the one that generated the object being debugged (e.g. in case we're inside a Macro BP while debugging)
Blueprint = Cast<UBlueprint>(ActiveObject->GetClass()->ClassGeneratedBy);
if (Blueprint == NULL)
{
return;
}
// if the blueprint doesn't have debug data, notify the user
/*if (!FKismetDebugUtilities::HasDebuggingData(Blueprint))
{
HoverTextOut += TEXT("\n(NO DEBUGGING INFORMATION GENERATED, NEED TO RECOMPILE THE BLUEPRINT)");
}*/
//@TODO: For exec pins, show when they were last executed
// grab the debug value of the pin
FString WatchText;
const FKismetDebugUtilities::EWatchTextResult WatchStatus = FKismetDebugUtilities::GetWatchText(/*inout*/ WatchText, Blueprint, ActiveObject, &Pin);
// if this is an array pin, then we possibly have too many lines (too many entries)
if (Pin.PinType.bIsArray)
{
int32 LineCounter = 0;
int32 OriginalWatchTextLen = WatchText.Len();
// walk the string, finding line breaks (counting lines)
for (int32 NewWatchTextLen = 0; NewWatchTextLen < OriginalWatchTextLen; )
{
++LineCounter;
int32 NewLineIndex = WatchText.Find("\n", ESearchCase::IgnoreCase, ESearchDir::FromStart, NewWatchTextLen);
// if we've reached the end of the string (it's not to long)
if (NewLineIndex == INDEX_NONE)
{
break;
}
NewWatchTextLen = NewLineIndex + 1;
// if we're at the end of the string (but it ends with a newline)
if (NewWatchTextLen >= OriginalWatchTextLen)
{
break;
}
// if we've hit the max number of lines allowed in a tooltip
if (LineCounter >= MaxArrayPinTooltipLineCount)
{
// truncate WatchText so it contains a finite number of lines
WatchText = WatchText.Left(NewWatchTextLen);
WatchText += "..."; // WatchText should already have a trailing newline (no need to prepend this with one)
break;
}
}
} // if Pin.PinType.bIsArray...
switch (WatchStatus)
{
case FKismetDebugUtilities::EWTR_Valid:
HoverTextOut += FString::Printf(TEXT("\nCurrent value = %s"), *WatchText); //@TODO: Print out object being debugged name?
break;
case FKismetDebugUtilities::EWTR_NotInScope:
HoverTextOut += TEXT("\n(Variable is not in scope)");
break;
default:
case FKismetDebugUtilities::EWTR_NoDebugObject:
case FKismetDebugUtilities::EWTR_NoProperty:
break;
}
}
void FKismetConnectionDrawingPolicy::BuildExecutionRoadmap()
{
LatestTimeDiscovered = 0.0;
// Only do highlighting in PIE or SIE
if (!CanBuildRoadmap())
{
return;
}
UBlueprint* TargetBP = FBlueprintEditorUtils::FindBlueprintForGraphChecked(GraphObj);
UObject* ActiveObject = TargetBP->GetObjectBeingDebugged();
check(ActiveObject); // Due to CanBuildRoadmap
// Redirect the target Blueprint when debugging with a macro graph visible
if (TargetBP->BlueprintType == BPTYPE_MacroLibrary)
{
TargetBP = Cast<UBlueprint>(ActiveObject->GetClass()->ClassGeneratedBy);
}
TArray<UEdGraphNode*> SequentialNodesInGraph;
TArray<double> SequentialNodeTimes;
{
const TSimpleRingBuffer<FKismetTraceSample>& TraceStack = FKismetDebugUtilities::GetTraceStack();
UBlueprintGeneratedClass* TargetClass = Cast<UBlueprintGeneratedClass>(TargetBP->GeneratedClass);
FBlueprintDebugData& DebugData = TargetClass->GetDebugData();
for (int32 i = 0; i < TraceStack.Num(); ++i)
{
const FKismetTraceSample& Sample = TraceStack(i);
if (UObject* TestObject = Sample.Context.Get())
{
if (TestObject == ActiveObject)
{
if (UEdGraphNode* Node = DebugData.FindSourceNodeFromCodeLocation(Sample.Function.Get(), Sample.Offset, /*bAllowImpreciseHit=*/ false))
{
if (GraphObj == Node->GetGraph())
{
SequentialNodesInGraph.Add(Node);
SequentialNodeTimes.Add(Sample.ObservationTime);
}
else
{
// If the top-level source node is a macro instance node
UK2Node_MacroInstance* MacroInstanceNode = Cast<UK2Node_MacroInstance>(Node);
if (MacroInstanceNode)
{
// Attempt to locate the macro source node through the code mapping
UEdGraphNode* MacroSourceNode = DebugData.FindMacroSourceNodeFromCodeLocation(Sample.Function.Get(), Sample.Offset);
if (MacroSourceNode)
{
// If the macro source node is located in the current graph context
if (GraphObj == MacroSourceNode->GetGraph())
{
// Add it to the sequential node list
SequentialNodesInGraph.Add(MacroSourceNode);
SequentialNodeTimes.Add(Sample.ObservationTime);
}
else
{
// The macro source node isn't in the current graph context, but we might have a macro instance node that is
// in the current graph context, so obtain the set of macro instance nodes that are mapped to the code here.
TArray<UEdGraphNode*> MacroInstanceNodes;
DebugData.FindMacroInstanceNodesFromCodeLocation(Sample.Function.Get(), Sample.Offset, MacroInstanceNodes);
// For each macro instance node in the set
for (auto MacroInstanceNodeIt = MacroInstanceNodes.CreateConstIterator(); MacroInstanceNodeIt; ++MacroInstanceNodeIt)
{
// If the macro instance node is located in the current graph context
MacroInstanceNode = Cast<UK2Node_MacroInstance>(*MacroInstanceNodeIt);
if (MacroInstanceNode && GraphObj == MacroInstanceNode->GetGraph())
{
// Add it to the sequential node list
SequentialNodesInGraph.Add(MacroInstanceNode);
SequentialNodeTimes.Add(Sample.ObservationTime);
// Exit the loop; we're done
break;
}
}
}
}
}
}
}
}
}
}
}
// Run thru and apply bonus time
const float InvNumNodes = 1.0f / (float)SequentialNodeTimes.Num();
for (int32 i = 0; i < SequentialNodesInGraph.Num(); ++i)
{
double& ObservationTime = SequentialNodeTimes[i];
const float PositionRatio = (SequentialNodeTimes.Num() - i) * InvNumNodes;
const float PositionBonus = FMath::Pow(PositionRatio, TracePositionExponent) * TracePositionBonusPeriod;
ObservationTime += PositionBonus;
LatestTimeDiscovered = FMath::Max<double>(LatestTimeDiscovered, ObservationTime);
}
// Record the unique node->node pairings, keeping only the most recent times for each pairing
for (int32 i = SequentialNodesInGraph.Num() - 1; i >= 1; --i)
{
UEdGraphNode* CurNode = SequentialNodesInGraph[i];
double CurNodeTime = SequentialNodeTimes[i];
UEdGraphNode* NextNode = SequentialNodesInGraph[i-1];
double NextNodeTime = SequentialNodeTimes[i-1];
FExecPairingMap& Predecessors = PredecessorNodes.FindOrAdd(NextNode);
// Update the timings if this is a more recent pairing
FTimePair& Timings = Predecessors.FindOrAdd(CurNode);
if (Timings.ThisExecTime < NextNodeTime)
{
Timings.PredExecTime = CurNodeTime;
Timings.ThisExecTime = NextNodeTime;
}
}
// Fade only when free-running (since we're using GCurrentTime, instead of FPlatformTime::Seconds)
const double MaxTimeAhead = FMath::Min(GCurrentTime + 2*TracePositionBonusPeriod, LatestTimeDiscovered); //@TODO: Rough clamping; should be exposed as a parameter
CurrentTime = FMath::Max(GCurrentTime, MaxTimeAhead);
}
void FKismetConnectionDrawingPolicy::BuildExecutionRoadmap()
{
LatestTimeDiscovered = 0.0;
// Only do highlighting in PIE or SIE
if (!CanBuildRoadmap())
{
return;
}
UBlueprint* TargetBP = FBlueprintEditorUtils::FindBlueprintForGraphChecked(GraphObj);
UObject* ActiveObject = TargetBP->GetObjectBeingDebugged();
check(ActiveObject); // Due to CanBuildRoadmap
// Redirect the target Blueprint when debugging with a macro graph visible
if (TargetBP->BlueprintType == BPTYPE_MacroLibrary)
{
TargetBP = Cast<UBlueprint>(ActiveObject->GetClass()->ClassGeneratedBy);
}
TArray<UEdGraphNode*> SequentialNodesInGraph;
TArray<double> SequentialNodeTimes;
TArray<UEdGraphPin*> SequentialExecPinsInGraph;
{
const TSimpleRingBuffer<FKismetTraceSample>& TraceStack = FKismetDebugUtilities::GetTraceStack();
UBlueprintGeneratedClass* TargetClass = Cast<UBlueprintGeneratedClass>(TargetBP->GeneratedClass);
FBlueprintDebugData& DebugData = TargetClass->GetDebugData();
for (int32 i = 0; i < TraceStack.Num(); ++i)
{
const FKismetTraceSample& Sample = TraceStack(i);
if (UObject* TestObject = Sample.Context.Get())
{
if (TestObject == ActiveObject)
{
UEdGraphPin* AssociatedPin = DebugData.FindExecPinFromCodeLocation(Sample.Function.Get(), Sample.Offset);
if (UEdGraphNode* Node = DebugData.FindSourceNodeFromCodeLocation(Sample.Function.Get(), Sample.Offset, /*bAllowImpreciseHit=*/ false))
{
if (GraphObj == Node->GetGraph())
{
SequentialNodesInGraph.Add(Node);
SequentialNodeTimes.Add(Sample.ObservationTime);
SequentialExecPinsInGraph.Add(AssociatedPin);
}
else
{
// If the top-level source node is a macro instance node
UK2Node_MacroInstance* MacroInstanceNode = Cast<UK2Node_MacroInstance>(Node);
if (MacroInstanceNode)
{
// Attempt to locate the macro source node through the code mapping
UEdGraphNode* MacroSourceNode = DebugData.FindMacroSourceNodeFromCodeLocation(Sample.Function.Get(), Sample.Offset);
if (MacroSourceNode)
{
// If the macro source node is located in the current graph context
if (GraphObj == MacroSourceNode->GetGraph())
{
// Add it to the sequential node list
SequentialNodesInGraph.Add(MacroSourceNode);
SequentialNodeTimes.Add(Sample.ObservationTime);
SequentialExecPinsInGraph.Add(AssociatedPin);
}
else
{
// The macro source node isn't in the current graph context, but we might have a macro instance node that is
// in the current graph context, so obtain the set of macro instance nodes that are mapped to the code here.
TArray<UEdGraphNode*> MacroInstanceNodes;
DebugData.FindMacroInstanceNodesFromCodeLocation(Sample.Function.Get(), Sample.Offset, MacroInstanceNodes);
// For each macro instance node in the set
for (auto MacroInstanceNodeIt = MacroInstanceNodes.CreateConstIterator(); MacroInstanceNodeIt; ++MacroInstanceNodeIt)
{
// If the macro instance node is located in the current graph context
MacroInstanceNode = Cast<UK2Node_MacroInstance>(*MacroInstanceNodeIt);
if (MacroInstanceNode && GraphObj == MacroInstanceNode->GetGraph())
{
// Add it to the sequential node list
SequentialNodesInGraph.Add(MacroInstanceNode);
SequentialNodeTimes.Add(Sample.ObservationTime);
SequentialExecPinsInGraph.Add(AssociatedPin);
// Exit the loop; we're done
break;
}
}
}
}
}
}
}
}
}
}
}
// Run thru and apply bonus time
const float InvNumNodes = 1.0f / (float)SequentialNodeTimes.Num();
for (int32 i = 0; i < SequentialNodesInGraph.Num(); ++i)
{
double& ObservationTime = SequentialNodeTimes[i];
const float PositionRatio = (SequentialNodeTimes.Num() - i) * InvNumNodes;
const float PositionBonus = FMath::Pow(PositionRatio, TracePositionExponent) * TracePositionBonusPeriod;
ObservationTime += PositionBonus;
LatestTimeDiscovered = FMath::Max<double>(LatestTimeDiscovered, ObservationTime);
}
UEdGraphPin* LastExecPin = NULL;
// Record the unique exec-pin to time pairings, keeping only the most recent
// times for each pairing... reverse the "SequentialNodes" because right now
// it is in stack order (with the last executed node first)
for (int32 i = SequentialNodesInGraph.Num() - 1; i >= 1; --i)
{
UEdGraphNode* CurNode = SequentialNodesInGraph[i];
UEdGraphNode* NextNode = SequentialNodesInGraph[i-1];
// keep track of the last exec-pin executed by CurNode (these tracked
// pins coincide with "WireTraceSite" op-codes that have been injected
// prior to every "goto" statement... this way we have context for which
// pin executed the jump)
if (UEdGraphPin* AssociatedPin = SequentialExecPinsInGraph[i])
{
LastExecPin = AssociatedPin;
}
// if this statement is a jump (from one node to another)
if (CurNode != NextNode)
{
// if there was a wire-trace op-code inserted before this jump
if (LastExecPin != NULL)
{
//ensure(LastExecPin->GetOwningNode() == CurNode);
double NextNodeTime = SequentialNodeTimes[i-1];
FExecPairingMap& ExecPaths = PredecessorPins.FindOrAdd(NextNode);
FTimePair& ExecTiming = ExecPaths.FindOrAdd(LastExecPin);
// make sure that if we've already visited this exec-pin (like
// in a for-loop or something), that we're replacing it with a
// more recent execution time
//
// @TODO I don't see when this wouldn't be the case
if (ExecTiming.ThisExecTime < NextNodeTime)
{
double CurNodeTime = SequentialNodeTimes[i];
ExecTiming.ThisExecTime = NextNodeTime;
ExecTiming.PredExecTime = CurNodeTime;
}
}
// if the nodes aren't graphically connected how could they be
// executed back-to-back? well, this could be a pop back to a
// sequence node from the end of one thread of execution, etc.
else if (AreNodesGraphicallySequential(CurNode, NextNode))
{
// only warn when the nodes are directly connected (this is all
// for execution flow visualization after all)
UE_LOG(LogConnectionDrawingPolicy, Warning, TEXT("Looks like a wire-trace was not injected before the jump from '%s' to '%s'."),
*CurNode->GetNodeTitle(ENodeTitleType::FullTitle).ToString(), *NextNode->GetNodeTitle(ENodeTitleType::FullTitle).ToString());
}
// clear the exec-pin (we're moving to a new node and want to find
// it's executed out pin)
LastExecPin = NULL;
}
// else, we're only collecting this data for tracing node-to-node
// executions (so we don't care about this sequence of statements)
}
// Fade only when free-running (since we're using FApp::GetCurrentTime(), instead of FPlatformTime::Seconds)
const double MaxTimeAhead = FMath::Min(FApp::GetCurrentTime() + 2*TracePositionBonusPeriod, LatestTimeDiscovered); //@TODO: Rough clamping; should be exposed as a parameter
CurrentTime = FMath::Max(FApp::GetCurrentTime(), MaxTimeAhead);
}