Working on positionable crosshair

Source/Integration/UtilityLibrary.h

@@ -3,10 +3,37 @@
 #pragma once
 
 #include "CoreMinimal.h"
+#include "Kismet/KismetSystemLibrary.h"
+
 #include "UtilityLibrary.generated.h"
 
 class UEnhancedInputLocalPlayerSubsystem;
 
+USTRUCT(BlueprintType)
+struct INTEGRATION_API FlxTraceStartTraceEnd
+{
+	GENERATED_BODY()
+
+	UPROPERTY(EditAnywhere)
+	FVector TraceStart;
+
+	UPROPERTY(EditAnywhere)
+	FVector TraceEnd;
+};
+
+UENUM(BlueprintType)
+enum class EMouseSpecificationType : uint8
+{
+	// Automatically get the mouse position from the player controller.  ManualMouseXY should be left blank.
+	GetMouseAutomatically,
+
+	// Specify the mouse position in pixels.
+	SpecifyMouseInPixels,
+
+	// Specify the mouse position as float from zero to one.
+	SpecifyMouseAsZeroToOne,
+};
+
 /**
  *
  * UlxUtilityLibrary is for functions that are aren't particularly luprex-specific,
@@ -47,4 +74,23 @@ public:
 	// enhanced input subsystem, return nullptr.
 	UFUNCTION(BlueprintCallable, BlueprintPure, Category="Player Controller|Local Player Subsystems")
 		static UEnhancedInputLocalPlayerSubsystem *GetEnhancedInputLocalPlayerSubsystem(AController *Controller);
+
+	// // Do a Line Trace by Channel for each start-and-end pair, then return the closest hit result of all.
+	// UFUNCTION(BlueprintCallable, Category="Collision", meta=(bIgnoreReferenceActor="true", AutoCreateRefTerm="ActorsToIgnore,Offset", DisplayName="Line Trace Multiple Lines by Channel", AdvancedDisplay="TraceColor,TraceHitColor,DrawTime", Keywords="raycast"))
+	// 	static bool LineTraceMultipleLines(const AActor* ReferenceActor, const FVector &Offset,
+	// 		const TArray<FlxTraceStartTraceEnd> &TraceStartAndTraceEnd, ETraceTypeQuery TraceChannel,
+	// 		bool bTraceComplex, const TArray<AActor*>& ActorsToIgnore, EDrawDebugTrace::Type DrawDebugType, FHitResult& OutHit, bool bIgnoreReferenceActor,
+	// 		FLinearColor TraceColor = FLinearColor::Red, FLinearColor TraceHitColor = FLinearColor::Green, float DrawTime = 5.0f);
+
+	// Do a Line Trace to find the actor that the mouse is pointing at.
+	//
+	// If you have some crosshairs in the viewport, then you can find the
+	// object under the crosshairs by specifying the crosshairs XY as the
+	// ManualMouseXY.
+	//
+	UFUNCTION(BlueprintCallable, Category="Collision", meta=(AutoCreateRefTerm="ActorsToIgnore", Keywords="raycast"))
+		static bool LineTraceThroughMousePointer(const APlayerController* PlayerController, 
+			EMouseSpecificationType MouseSpecification, FVector2D ManualMouseXY, double MaxDistanceFromCamera,
+			ETraceTypeQuery TraceChannel, bool bTraceComplex, EDrawDebugTrace::Type DrawDebugType, bool bIgnorePlayerPawn,
+			const TArray<AActor*>& ActorsToIgnore, AActor *& Actor, FHitResult& HitResult);
 };