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> Unreal Engine API Reference > Plugins > GeometricObjects > Intersection > TIntrSegment2Segment2

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TIntrSegment2Segment2

Ported from WildMagic5

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References

Module	GeometricObjects
Header	/Engine/Plugins/Experimental/GeometryProcessing/Source/GeometricObjects/Public/Intersection/IntrSegment2Segment2.h
Include	#include "Intersection/IntrSegment2Segment2.h"

Syntax

template<typename RealType>
class TIntrSegment2Segment2

Remarks

Ported from WildMagic5

RealType IntervalThreshold The intersection testing uses the center-extent form for line segments. If you start with endpoints (Vector2<Real>) and create Segment2<Real> objects, the conversion to center-extent form can contain small numerical round-off errors. Testing for the intersection of two segments that share an endpoint might lead to a failure due to the round-off errors. To allow for this, you may specify a small positive threshold that slightly enlarges the intervals for the segments. The default value is zero.

RealType DotThreshold The computation for determining whether the linear components are parallel might contain small floating-point round-off errors. The default threshold is TMathUtil<RealType>::ZeroTolerance. If you set the value, pass in a nonnegative number.

The intersection set: Let q = Quantity. The cases are

q = 0: The segments do not intersect. Type is Empty

q = 1: The segments intersect in a single point. Type is Point Intersection point is Point0.

q = 2: The segments are collinear and intersect in a segment. Type is Segment. Points are Point0 and Point1 Calculate intersection between two 2D line segments

Variables

	Name	Description
RealType	DotThreshold
RealType	IntervalThreshold
RealType	Parameter0
RealType	Parameter1
FVector2< RealT...	Point0	These values are all on segment 1, unlike many other tests!!
FVector2< RealT...	Point1
int	Quantity	Outputs
EIntersectionRe...	Result
TSegment2< Real...	Segment1	Inputs
TSegment2< Real...	Segment2
EIntersectionTy...	Type

Constructors

	Name	Description
	TIntrSegment2Segment2 ( const TSegment2< RealType >& Segme..., const TSegment2< RealType >& Segme... )

Functions

		Name	Description
	TIntrSegment...	Compute()
	bool	Find()
	RealType	GetDotThreshold()
	RealType	GetIntervalThreshold()
	const TSegme...	GetSegment1()
	const TSegme...	GetSegment2()
	bool	IsSimpleIntersection()
	void	SanityCheck()
	void	SetDotThreshold ( RealType Value )
	void	SetIntervalThreshold ( RealType Value )
	void	SetSegment1 ( const TSegment2< RealType >& Value )
	void	SetSegment2 ( const TSegment2< RealType >& Value )

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