UE::CADKernel::TSamplerBasedOnParametrizationAndChordError< PolylineType, PointType > Class Template Reference

#include <SamplerOnParam.h>

Inheritance diagram for UE::CADKernel::TSamplerBasedOnParametrizationAndChordError< PolylineType, PointType >:

Public Member Functions
	TSamplerBasedOnParametrizationAndChordError (const FLinearBoundary &InBoundary, double InMaxChordError, double InMaxParameterizationError, PolylineType &OutPolyline)
Public Member Functions inherited from UE::CADKernel::TCurveSamplerAbstract< PolylineType, PointType >
	TCurveSamplerAbstract (const FLinearBoundary &InBoundary, PolylineType &OutPolyline, double InDesiredChordError)
virtual	~TCurveSamplerAbstract ()=default
virtual void	Sample ()

Protected Member Functions
virtual int32	CheckSamplingError (int32 FirstIndex, int32 EndIndex) override
Protected Member Functions inherited from UE::CADKernel::TCurveSamplerAbstract< PolylineType, PointType >
virtual void	EvaluatesNewCandidatePoints ()=0
virtual void	GetNotDerivableCoordinates (TArray< double > &OutNotDerivableCoordinates)
virtual void	SamplingInitalizing ()
void	RunSampling ()
bool	AddIntermediateCoordinates (double UMin, double UMax, int32 PointNum)
void	CompletesPolyline (int32 NeededPointNumber, int32 IntermediateIndex)
int32	GetFirstNeighbor (int32 NeighborIndex, const double StartCoordinate, const PolylineType &Points, const int32 Increment, double &NeighborCoordinate)
int32	CountOfNeededPointsToRespectChordError (const PointType &PointA, const PointType &PointB, double ChordError)
int32	CheckTangentError (const PointType &APoint, double ACoordinate, const PointType &BPoint, double BCoordinate, int32 FirstIndex, int32 EndIndex, int32 InStartSamplingSegmentIndex)

Protected Attributes
double	DesiredParameterizationError
Protected Attributes inherited from UE::CADKernel::TCurveSamplerAbstract< PolylineType, PointType >
FLinearBoundary	Boundary
PolylineType &	Sampling
PolylineType	CandidatePoints
const TArray< double > &	TmpPolylineCoordinates
const TArray< double > &	SamplingCoordinates
TArray< char >	IsOptimalSegments
int32	StartSamplingSegmentIndex
int32	EndSamplingSegmentIndex
TSamplingPoint	EndStudySegment
TArray< double >	NextCoordinates
double	DesiredChordError

Constructor & Destructor Documentation

TSamplerBasedOnParametrizationAndChordError()

template<typename PolylineType , typename PointType >

UE::CADKernel::TSamplerBasedOnParametrizationAndChordError< PolylineType, PointType >::TSamplerBasedOnParametrizationAndChordError ( const FLinearBoundary &  InBoundary, double  InMaxChordError, double  InMaxParameterizationError, PolylineType &  OutPolyline  )

inline

Member Function Documentation

CheckSamplingError()

template<typename PolylineType , typename PointType >

virtual int32 UE::CADKernel::TSamplerBasedOnParametrizationAndChordError< PolylineType, PointType >::CheckSamplingError ( int32  FirstIndex, int32  EndIndex  )

inlineoverrideprotectedvirtual

This function check the chord error and the parametrization error

Chord error: Check the chord error of the AB segment for each point of TmpPoints between FirstIndex and EndIndex If the MaxChord is biggest to the DesiredChordError, an estimation of the needed point number to insert is done. This estimation is bases on the approximation of local curve radius (R) : R = square(L) / 8Sag L2 = sqrt(square(L1) * S2 / S1) S2 = S1 * square(L2 / L1)

Sag & Angle criterion.pdf https://docs.google.com/presentation/d/1bUnrRFWCW3sDn9ngb9ftfQS-2JxNJaUZlh783hZMMEw/edit?usp=sharing

Returns

the number of point to add after PointA to PointB to respect the chord error. if PointNum = 0, PointB is not necessary if PointNum = 1, PointB has to be add to respect the chord error and the segment AB is respecting the chord error if PointNum = 2, Point at FirstIndex and PointB have to be add to respect the chord error and both segments are respecting the chord error if PointNum > 2, Point at FirstIndex and PointB have to be add but at least (PointNum - 2) points have to be added in both segments to respect the chord error

Parametrization error: This function check that for inner point of the segment AB, point M(u) is near its approximation = A + AB * (u - uA) / (uB - uA) than the MaxAllowedError To Remove Chord error, M approximation is compare to the projection of M(u) on AB

Implements UE::CADKernel::TCurveSamplerAbstract< PolylineType, PointType >.

Member Data Documentation

DesiredParameterizationError

template<typename PolylineType , typename PointType >

double UE::CADKernel::TSamplerBasedOnParametrizationAndChordError< PolylineType, PointType >::DesiredParameterizationError

protected

---

The documentation for this class was generated from the following file:

• Engine/Source/Runtime/Datasmith/CADKernel/Base/Private/Geo/Sampler/SamplerOnParam.h