Adding flags endpoint type flags pt.1

Author: Nebukam

Source/PCGExElementsClipper2/Private/Core/PCGExClipper2Processor.cpp

@@ -181,6 +181,11 @@ namespace PCGExClipper2
 UPCGExClipper2ProcessorSettings::UPCGExClipper2ProcessorSettings(const FObjectInitializer& ObjectInitializer)
 	: Super(ObjectInitializer)
 {
+	if (const UEnum* EnumClass = StaticEnum<EPCGExClipper2EndpointType>())
+	{
+		const int32 NumEnums = EnumClass->NumEnums() - 1; // Skip _MAX
+		for (int32 i = 0; i < NumEnums; ++i) { EndpointTypeValueMapping.Add(static_cast<EPCGExClipper2EndpointType>(EnumClass->GetValueByIndex(i)), i); }
+	}
 }
 
 bool UPCGExClipper2ProcessorSettings::IsPinUsedByNodeExecution(const UPCGPin* InPin) const
@@ -755,6 +760,40 @@ void FPCGExClipper2ProcessorContext::OutputPaths64(
 				Blender->MergeSingle(i, WeightedPoints, Trackers);
 			}
 
+			// -- Flag writing (after blending, before WriteFastest) --
+			TSharedPtr<PCGExData::TBuffer<bool>> IntersectionWriter;
+			TSharedPtr<PCGExData::TBuffer<int32>> EndpointWriter;
+
+			if (Settings->bFlagIntersections)
+			{
+				IntersectionWriter = OutputFacade->GetWritable<bool>(Settings->IntersectionFlagName, false, true, PCGExData::EBufferInit::New);
+			}
+			if (Settings->bFlagEndpoints)
+			{
+				EndpointWriter = OutputFacade->GetWritable<int32>(Settings->EndpointFlagName, Settings->EndpointTypeValueMapping[EPCGExClipper2EndpointType::None], true, PCGExData::EBufferInit::New);
+			}
+
+			if (IntersectionWriter || EndpointWriter)
+			{
+				for (int32 i = 0; i < NumPoints; i++)
+				{
+					if (IntersectionWriter)
+					{
+						const PCGExClipper2Lib::Point64& FlagPt = Path[i];
+						uint32 FlagPtIdx, FlagSrcIdx;
+						PCGEx::H64(static_cast<uint64>(FlagPt.z), FlagPtIdx, FlagSrcIdx);
+						IntersectionWriter->SetValue(i, FlagPtIdx == PCGExClipper2::INTERSECTION_MARKER);
+					}
+					if (EndpointWriter)
+					{
+						EPCGExClipper2EndpointType Type = EPCGExClipper2EndpointType::None;
+						if (i == 0) { Type = EPCGExClipper2EndpointType::Start; }
+						else if (i == NumPoints - 1) { Type = EPCGExClipper2EndpointType::End; }
+						EndpointWriter->SetValue(i, Settings->EndpointTypeValueMapping[Type]);
+					}
+				}
+			}
+
 			OutputFacade->WriteFastest(GetTaskManager());
 		}
 

Source/PCGExElementsClipper2/Public/Core/PCGExClipper2Processor.h

@@ -18,6 +18,14 @@ struct FPCGExBlendingDetails;
 struct FPCGExCarryOverDetails;
 
 
+UENUM(BlueprintType)
+enum class EPCGExClipper2EndpointType : uint8
+{
+	None  = 0 UMETA(DisplayName = "None"),
+	Start = 1 UMETA(DisplayName = "Start"),
+	End   = 2 UMETA(DisplayName = "End"),
+};
+
 UENUM(BlueprintType)
 enum class EPCGExClipper2JoinType : uint8
 {
@@ -277,6 +285,26 @@ class PCGEXELEMENTSCLIPPER2_API UPCGExClipper2ProcessorSettings : public UPCGExP
 	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Tagging", meta=(EditCondition="bTagHoles"))
 	FString HoleTag = TEXT("Hole");
 
+	/** Write a flag marking intersection points (points created by Clipper2 at path crossings). */
+	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Flags", meta = (PCG_Overridable, InlineEditConditionToggle))
+	bool bFlagIntersections = false;
+
+	/** Name of the boolean attribute for intersection points */
+	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Flags", meta = (PCG_Overridable, EditCondition="bFlagIntersections"))
+	FName IntersectionFlagName = "IsIntersection";
+
+	/** Write a flag marking path endpoint (start/end) points. */
+	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Flags", meta = (PCG_Overridable, InlineEditConditionToggle))
+	bool bFlagEndpoints = false;
+
+	/** Name of the int32 attribute for path endpoint type */
+	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Flags", meta = (PCG_Overridable, EditCondition="bFlagEndpoints"))
+	FName EndpointFlagName = "EndpointType";
+
+	/** Pick which value will be written for each endpoint type. */
+	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Settings|Output|Flags", EditFixedSize, meta = (ReadOnlyKeys, DisplayName=" └─ Mapping", EditCondition="bFlagEndpoints", HideEditConditionToggle))
+	TMap<EPCGExClipper2EndpointType, int32> EndpointTypeValueMapping;
+
 	/** (DEBUG) If enabled, performs a union of all paths in the group before proceeding to the operation */
 	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = Settings, meta = (PCG_NotOverridable), AdvancedDisplay)
 	bool bUnionGroupBeforeOperation = false;