ULimenMath

Overview

ULimenMath is a Blueprint callable function library that offers a range of mathematical operations useful in game development. It includes functions for rounding numbers, rotating actors and pawns, finding the closest actor or component to a given location, performing cone traces, and more. This class is designed to be used both within Blueprints and C++ code.

Properties

Type	Name	Access	Description
EDirection3D[]	AllDirections	Static	A static array containing all possible directions in 3D space.
EDirection3D[]	TopViewDirections	Static	A static array containing directions that are visible from the top view (Forward, Backward, Left, Right).
EDirection3D[]	SideViewDirections	Static	A static array containing directions that are visible from a side view (Left, Right, Up, Down).

Functions

Return Type	Signature	Description
int64	RoundToNearestInteger(const double Value)	Rounds a floating point number to the nearest integer value.
double	RoundToNearestDouble(const double Value, const uint8 NumDecimals = 2)	Rounds a floating point number to the nearest value specified number of decimals.
void	RotateActorAroundPoint(AActor* Actor, const FVector Point, const double DegreeRotation, const FVector Axis = FVector(0.f, 0.f, 1.f))	Rotates an actor around a given point by a specified degree and axis.
bool	RotatePawnAroundPoint(AController* Controller, const FVector Point, const double DegreeRotation, const FVector Axis = FVector(0.f, 0.f, 1.f))	Rotates a pawn controlled by a controller around a given point by a specified degree and axis.
FTransform	RotatePointAroundPoint(const FVector Point, const FVector RotationCenter, const double DegreeRotation, const FVector Axis = FVector(0.f, 0.f, 1.f))	Returns the transform of a point after rotating it around a center point by a specified degree and axis.
FTransform	RotateTransform(const FTransform TransformToRotate, const FVector RotationCenter, const double DegreeRotation, const FVector Axis = FVector(0.f, 0.f, 1.f))	Rotates a given transform around a center point by a specified degree and axis.
AActor*	GetClosestActorTo(const FVector& Location, const TArray<AActor*>& ActorsList)	Finds the closest actor to a given location from a list of actors.
AActor*	GetClosestActorOfClassTo(const FVector& Location, const TArray<AActor*>& ActorsList, const TSubclassOf & InClass)	Finds the closest actor of a specific class to a given location from a list of actors.
UPrimitiveComponent*	GetClosestComponentsTo(const FVector& Location, const TArray<UPrimitiveComponent*>& ComponentsList, float& OutClosestDistanceSquared)	Finds the closest component to a given location from a list of components and returns the distance squared.
bool	ConeTraceMultiByProfile(const UWorld* World, const FConeData& InConeData, const FName& ProfileName, TArray & OutHits, const FCollisionQueryParams& QueryParams, const FCollisionResponseParams& ResponseParams, const float TraceResolution, const bool bThreadSafe = true)	Performs a cone trace using a specified profile and returns the hits.
bool	IsInteger(const double Test)	Checks if a floating point number is an integer.
FRotator	ClampToMajorAxis(const FRotator InRotator)	Clamps a rotator to the nearest major axis (10deg = 0deg; 150deg == 180deg).
float	QuantizeWithHysteresis(const float AngleDegrees, const float StepDegrees, const float HysteresisDegrees, float& LastSnapDegrees)	Quantizes an angle with hysteresis.
float	SignedAngleAroundAxis(const FVector& From, const FVector& To, const FVector& Axis)	Calculates the signed angle between two vectors around a specified axis.

Usage & Implementation Notes

The RotateActorAroundPoint and RotatePawnAroundPoint functions use Unreal Engine's FRotator and FTransform to handle rotations accurately.
The ConeTraceMultiByProfile function performs multiple sweeps along the cone's height, checking for collisions with the specified profile.
The IsInteger function checks if a number is an integer by comparing it to its rounded value.
The ClampToMajorAxis function clamps each axis of a rotator to the nearest major axis (0, 90, 180, or 270 degrees).
The QuantizeWithHysteresis function quantizes an angle with hysteresis to prevent rapid changes when crossing snap points.

22 May 2026