OCC.Core.Approx module

Approx module, see official documentation at https://www.opencascade.com/doc/occt-7.4.0/refman/html/package_approx.html

class Approx_Array1OfAdHSurface(*args)

Bases: object

Assign()

ChangeFirst()

ChangeLast()

ChangeValue()

First()

Init()

IsAllocated()

IsDeletable()

IsEmpty()

Last()

Length()

Lower()

Move()

Resize()

Set()

SetValue()

Size()

Upper()

Value()

begin()

cbegin()

cend()

end()

next()

property thisown

The membership flag

class Approx_Array1OfGTrsf2d(*args)

Bases: object

Assign()

ChangeFirst()

ChangeLast()

ChangeValue()

First()

Init()

IsAllocated()

IsDeletable()

IsEmpty()

Last()

Length()

Lower()

Move()

Resize()

Set()

SetValue()

Size()

Upper()

Value()

begin()

cbegin()

cend()

end()

next()

property thisown

The membership flag

class Approx_Curve2d(*args)

Bases: object

Parameters

C2D –

type C2D

Adaptor2d_HCurve2d

param First

type First

float

param Last

type Last

float

param TolU

type TolU

float

param TolV

type TolV

float

param Continuity

type Continuity

GeomAbs_Shape

param MaxDegree

type MaxDegree

int

param MaxSegments

type MaxSegments

int

rtype

None

Curve()

Return type

opencascade::handle<Geom2d_BSplineCurve>

HasResult()

Return type

bool

IsDone()

Return type

bool

MaxError2dU()

Return type

float

MaxError2dV()

Return type

float

property thisown

The membership flag

class Approx_Curve3d(*args)

Bases: object

• Approximation of a curve with respect of the requiered tolerance Tol3D.

  param Curve

  type Curve

  Adaptor3d_HCurve

  param Tol3d

  type Tol3d

  float

  param Order

  type Order

  GeomAbs_Shape

  param MaxSegments

  type MaxSegments

  int

  param MaxDegree

  type MaxDegree

  int

  rtype

  None

Curve()

Return type

opencascade::handle<Geom_BSplineCurve>

DumpToString(Approx_Curve3d self) → std::string

HasResult()

• returns Standard_True if the approximation did come out with a result that is not NECESSARELY within the required tolerance

  rtype

  bool

IsDone()

• returns Standard_True if the approximation has been done within requiered tolerance

  rtype

  bool

MaxError()

• returns the Maximum Error (>0 when an approximation has been done, 0 if no approximation)

  rtype

  float

property thisown

The membership flag

class Approx_CurveOnSurface(*args)

Bases: object

Parameters

C2D –

type C2D

Adaptor2d_HCurve2d

param Surf

type Surf

Adaptor3d_HSurface

param First

type First

float

param Last

type Last

float

param Tol

type Tol

float

param Continuity

type Continuity

GeomAbs_Shape

param MaxDegree

type MaxDegree

int

param MaxSegments

type MaxSegments

int

param Only3d

default value is Standard_False

type Only3d

bool

param Only2d

default value is Standard_False

type Only2d

bool

rtype

None

Curve2d()

Return type

opencascade::handle<Geom2d_BSplineCurve>

Curve3d()

Return type

opencascade::handle<Geom_BSplineCurve>

HasResult()

Return type

bool

IsDone()

Return type

bool

MaxError2dU()

Return type

float

MaxError2dV()

• returns the maximum errors relativly to the U component or the V component of the 2d Curve

  rtype

  float

MaxError3d()

Return type

float

property thisown

The membership flag

class Approx_CurvilinearParameter(*args)

Bases: object

• case of a free 3D curve

  param C3D

  type C3D

  Adaptor3d_HCurve

  param Tol

  type Tol

  float

  param Order

  type Order

  GeomAbs_Shape

  param MaxDegree

  type MaxDegree

  int

  param MaxSegments

  type MaxSegments

  int

  rtype

  None* case of a curve on one surface

  param C2D

  type C2D

  Adaptor2d_HCurve2d

  param Surf

  type Surf

  Adaptor3d_HSurface

  param Tol

  type Tol

  float

  param Order

  type Order

  GeomAbs_Shape

  param MaxDegree

  type MaxDegree

  int

  param MaxSegments

  type MaxSegments

  int

  rtype

  None* case of a curve on two surfaces

  param C2D1

  type C2D1

  Adaptor2d_HCurve2d

  param Surf1

  type Surf1

  Adaptor3d_HSurface

  param C2D2

  type C2D2

  Adaptor2d_HCurve2d

  param Surf2

  type Surf2

  Adaptor3d_HSurface

  param Tol

  type Tol

  float

  param Order

  type Order

  GeomAbs_Shape

  param MaxDegree

  type MaxDegree

  int

  param MaxSegments

  type MaxSegments

  int

  rtype

  None

Curve2d1()

• returns the BsplineCurve representing the reparametrized 2D curve on the first surface (case of a curve on one or two surfaces)

  rtype

  opencascade::handle<Geom2d_BSplineCurve>

Curve2d2()

• returns the BsplineCurve representing the reparametrized 2D curve on the second surface (case of a curve on two surfaces)

  rtype

  opencascade::handle<Geom2d_BSplineCurve>

Curve3d()

• returns the Bspline curve corresponding to the reparametrized 3D curve

  rtype

  opencascade::handle<Geom_BSplineCurve>

DumpToString(Approx_CurvilinearParameter self) → std::string

HasResult()

Return type

bool

IsDone()

Return type

bool

MaxError2d1()

• returns the maximum error on the first reparametrized 2D curve

  rtype

  float

MaxError2d2()

• returns the maximum error on the second reparametrized 2D curve

  rtype

  float

MaxError3d()

• returns the maximum error on the reparametrized 3D curve

  rtype

  float

property thisown

The membership flag

class Approx_CurvlinFunc(*args)

Bases: OCC.Core.Standard.Standard_Transient

Parameters

C –

type C

Adaptor3d_HCurve

param Tol

type Tol

float

rtype

None:param C2D:

type C2D

Adaptor2d_HCurve2d

param S

type S

Adaptor3d_HSurface

param Tol

type Tol

float

rtype

None:param C2D1:

type C2D1

Adaptor2d_HCurve2d

param C2D2

type C2D2

Adaptor2d_HCurve2d

param S1

type S1

Adaptor3d_HSurface

param S2

type S2

Adaptor3d_HSurface

param Tol

type Tol

float

rtype

None

static DownCast(t)

EvalCase1()

• if myCase != 1

  param S

  type S

  float

  param Order

  type Order

  int

  param Result

  type Result

  TColStd_Array1OfReal

  rtype

  bool

EvalCase2()

• if myCase != 2

  param S

  type S

  float

  param Order

  type Order

  int

  param Result

  type Result

  TColStd_Array1OfReal

  rtype

  bool

EvalCase3()

• if myCase != 3

  param S

  type S

  float

  param Order

  type Order

  int

  param Result

  type Result

  TColStd_Array1OfReal

  rtype

  bool

FirstParameter()

Return type

float

GetLength()

Return type

float

GetSParameter()

• returns original parameter correponding S.

  param U

  type U

  float

  rtype

  float

GetUParameter()

• returns original parameter correponding S. if Case == 1 computation is performed on myC2D1 and mySurf1, otherwise it is done on myC2D2 and mySurf2.

  param C

  type C

  Adaptor3d_Curve

  param S

  type S

  float

  param NumberOfCurve

  type NumberOfCurve

  int

  rtype

  float

Intervals()

• Stores in <T> the parameters bounding the intervals of continuity <S>. //! The array must provide enough room to accomodate for the parameters. i.e. T.Length() > NbIntervals()

  param T

  type T

  TColStd_Array1OfReal

  param S

  type S

  GeomAbs_Shape

  rtype

  None

LastParameter()

Return type

float

Length()

• Computes length of the curve.

  rtype

  None* Computes length of the curve segment.

  param C

  type C

  Adaptor3d_Curve

  param FirstU

  type FirstU

  float

  param LasrU

  type LasrU

  float

  rtype

  float

NbIntervals()

• Returns the number of intervals for continuity <S>. May be one if Continuity(me) >= <S>

  param S

  type S

  GeomAbs_Shape

  rtype

  int

SetTol()

• —Purpose Update the tolerance to used

  param Tol

  type Tol

  float

  rtype

  None

Trim()

• if First < 0 or Last > 1

  param First

  type First

  float

  param Last

  type Last

  float

  param Tol

  type Tol

  float

  rtype

  None

property thisown

The membership flag

class Approx_FitAndDivide(*args)

Bases: object

• The MultiLine <Line> will be approximated until tolerances will be reached. The approximation will be done from degreemin to degreemax with a cutting if the corresponding boolean is True.

  param Line

  type Line

  AppCont_Function

  param degreemin

  default value is 3

  type degreemin

  int

  param degreemax

  default value is 8

  type degreemax

  int

  param Tolerance3d

  default value is 1.0e-5

  type Tolerance3d

  float

  param Tolerance2d

  default value is 1.0e-5

  type Tolerance2d

  float

  param cutting

  default value is Standard_False

  type cutting

  bool

  param FirstC

  default value is AppParCurves_TangencyPoint

  type FirstC

  AppParCurves_Constraint

  param LastC

  default value is AppParCurves_TangencyPoint

  type LastC

  AppParCurves_Constraint

  rtype

  None* Initializes the fields of the algorithm.

  param degreemin

  default value is 3

  type degreemin

  int

  param degreemax

  default value is 8

  type degreemax

  int

  param Tolerance3d

  default value is 1.0e-05

  type Tolerance3d

  float

  param Tolerance2d

  default value is 1.0e-05

  type Tolerance2d

  float

  param cutting

  default value is Standard_False

  type cutting

  bool

  param FirstC

  default value is AppParCurves_TangencyPoint

  type FirstC

  AppParCurves_Constraint

  param LastC

  default value is AppParCurves_TangencyPoint

  type LastC

  AppParCurves_Constraint

  rtype

  None

Error()

• returns the tolerances 2d and 3d of the <Index> MultiCurve.

  param Index

  type Index

  int

  param tol3d

  type tol3d

  float

  param tol2d

  type tol2d

  float

  rtype

  None

IsAllApproximated()

• returns False if at a moment of the approximation, the status NoApproximation has been sent by the user when more points were needed.

  rtype

  bool

IsToleranceReached()

• returns False if the status NoPointsAdded has been sent.

  rtype

  bool

NbMultiCurves()

• Returns the number of MultiCurve doing the approximation of the MultiLine.

  rtype

  int

Parameters()

Parameters

Index –

type Index

int

param firstp

type firstp

float

param lastp

type lastp

float

rtype

None

Perform()

• runs the algorithm after having initialized the fields.

  param Line

  type Line

  AppCont_Function

  rtype

  None

SetConstraints()

• Changes the constraints of the approximation.

  param FirstC

  type FirstC

  AppParCurves_Constraint

  param LastC

  type LastC

  AppParCurves_Constraint

  rtype

  None

SetDegrees()

• changes the degrees of the approximation.

  param degreemin

  type degreemin

  int

  param degreemax

  type degreemax

  int

  rtype

  None

SetInvOrder()

• Set inverse order of degree selection: if theInvOrdr = true, current degree is chosen by inverse order - from maxdegree to mindegree. By default inverse order is used.

  param theInvOrder

  type theInvOrder

  bool

  rtype

  None

SetMaxSegments()

• Changes the max number of segments, which is allowed for cutting.

  param theMaxSegments

  type theMaxSegments

  int

  rtype

  None

SetTolerances()

• Changes the tolerances of the approximation.

  param Tolerance3d

  type Tolerance3d

  float

  param Tolerance2d

  type Tolerance2d

  float

  rtype

  None

Value()

• returns the approximation MultiCurve of range <Index>.

  param Index

  default value is 1

  type Index

  int

  rtype

  AppParCurves_MultiCurve

property thisown

The membership flag

class Approx_FitAndDivide2d(*args)

Bases: object

• The MultiLine <Line> will be approximated until tolerances will be reached. The approximation will be done from degreemin to degreemax with a cutting if the corresponding boolean is True.

  param Line

  type Line

  AppCont_Function

  param degreemin

  default value is 3

  type degreemin

  int

  param degreemax

  default value is 8

  type degreemax

  int

  param Tolerance3d

  default value is 1.0e-5

  type Tolerance3d

  float

  param Tolerance2d

  default value is 1.0e-5

  type Tolerance2d

  float

  param cutting

  default value is Standard_False

  type cutting

  bool

  param FirstC

  default value is AppParCurves_TangencyPoint

  type FirstC

  AppParCurves_Constraint

  param LastC

  default value is AppParCurves_TangencyPoint

  type LastC

  AppParCurves_Constraint

  rtype

  None* Initializes the fields of the algorithm.

  param degreemin

  default value is 3

  type degreemin

  int

  param degreemax

  default value is 8

  type degreemax

  int

  param Tolerance3d

  default value is 1.0e-05

  type Tolerance3d

  float

  param Tolerance2d

  default value is 1.0e-05

  type Tolerance2d

  float

  param cutting

  default value is Standard_False

  type cutting

  bool

  param FirstC

  default value is AppParCurves_TangencyPoint

  type FirstC

  AppParCurves_Constraint

  param LastC

  default value is AppParCurves_TangencyPoint

  type LastC

  AppParCurves_Constraint

  rtype

  None

Error()

• returns the tolerances 2d and 3d of the <Index> MultiCurve.

  param Index

  type Index

  int

  param tol3d

  type tol3d

  float

  param tol2d

  type tol2d

  float

  rtype

  None

IsAllApproximated()

• returns False if at a moment of the approximation, the status NoApproximation has been sent by the user when more points were needed.

  rtype

  bool

IsToleranceReached()

• returns False if the status NoPointsAdded has been sent.

  rtype

  bool

NbMultiCurves()

• Returns the number of MultiCurve doing the approximation of the MultiLine.

  rtype

  int

Parameters()

Parameters

Index –

type Index

int

param firstp

type firstp

float

param lastp

type lastp

float

rtype

None

Perform()

• runs the algorithm after having initialized the fields.

  param Line

  type Line

  AppCont_Function

  rtype

  None

SetConstraints()

• Changes the constraints of the approximation.

  param FirstC

  type FirstC

  AppParCurves_Constraint

  param LastC

  type LastC

  AppParCurves_Constraint

  rtype

  None

SetDegrees()

• changes the degrees of the approximation.

  param degreemin

  type degreemin

  int

  param degreemax

  type degreemax

  int

  rtype

  None

SetInvOrder()

• Set inverse order of degree selection: if theInvOrdr = true, current degree is chosen by inverse order - from maxdegree to mindegree. By default inverse order is used.

  param theInvOrder

  type theInvOrder

  bool

  rtype

  None

SetMaxSegments()

• Changes the max number of segments, which is allowed for cutting.

  param theMaxSegments

  type theMaxSegments

  int

  rtype

  None

SetTolerances()

• Changes the tolerances of the approximation.

  param Tolerance3d

  type Tolerance3d

  float

  param Tolerance2d

  type Tolerance2d

  float

  rtype

  None

Value()

• returns the approximation MultiCurve of range <Index>.

  param Index

  default value is 1

  type Index

  int

  rtype

  AppParCurves_MultiCurve

property thisown

The membership flag

class Approx_HArray1OfAdHSurface(*args)

Bases: OCC.Core.Approx.Approx_Array1OfAdHSurface, OCC.Core.Standard.Standard_Transient

• Empty constructor

Return type

None* Copy constructor – does nothing

Parameters

& (Standard_Transient) –

Return type

None

Array1()

ChangeArray1()

static DownCast(t)

property thisown

The membership flag

class Approx_HArray1OfGTrsf2d(*args)

Bases: OCC.Core.Approx.Approx_Array1OfGTrsf2d, OCC.Core.Standard.Standard_Transient

• Empty constructor

Return type

None* Copy constructor – does nothing

Parameters

& (Standard_Transient) –

Return type

None

Array1()

ChangeArray1()

static DownCast(t)

property thisown

The membership flag

class Approx_MCurvesToBSpCurve(*args)

Bases: object

Return type

None

Append()

Parameters

MC –

type MC

AppParCurves_MultiCurve

rtype

None

ChangeValue()

• return the composite MultiCurves as a MultiBSpCurve.

  rtype

  AppParCurves_MultiBSpCurve

Perform()

Return type

None:param TheSeq: :type TheSeq: AppParCurves_SequenceOfMultiCurve :rtype: None

Reset()

Return type

None

Value()

• return the composite MultiCurves as a MultiBSpCurve.

  rtype

  AppParCurves_MultiBSpCurve

property thisown

The membership flag

class Approx_SameParameter(*args)

Bases: object

• Warning: the C3D and C2D must have the same parametric domain.

  param C3D

  type C3D

  Geom_Curve

  param C2D

  type C2D

  Geom2d_Curve

  param S

  type S

  Geom_Surface

  param Tol

  type Tol

  float

  rtype

  None:param C3D:

  type C3D

  Adaptor3d_HCurve

  param C2D

  type C2D

  Geom2d_Curve

  param S

  type S

  Adaptor3d_HSurface

  param Tol

  type Tol

  float

  rtype

  None* Warning: the C3D and C2D must have the same parametric domain.

  param C3D

  type C3D

  Adaptor3d_HCurve

  param C2D

  type C2D

  Adaptor2d_HCurve2d

  param S

  type S

  Adaptor3d_HSurface

  param Tol

  type Tol

  float

  rtype

  None

Curve2d()

• Returns the 2D curve that has the same parameter as the 3D curve once evaluated on the surface up to the specified tolerance

  rtype

  opencascade::handle<Geom2d_BSplineCurve>

IsDone()

Return type

bool

IsSameParameter()

• Tells whether the original data had already the same parameter up to the tolerancein that case nothing is done.

  rtype

  bool

TolReached()

Return type

float

property thisown

The membership flag

class Approx_SequenceOfHArray1OfReal(*args)

Bases: object

Append()

Assign()

ChangeFirst()

ChangeLast()

ChangeValue()

Clear()

Exchange()

First()

InsertAfter()

InsertBefore()

IsEmpty()

Last()

Length()

Lower()

Prepend()

Remove()

Reverse()

Set()

SetValue()

Size()

Split()

Upper()

Value()

begin()

cbegin()

cend()

static delNode()

end()

property thisown

The membership flag

class Approx_SweepApproximation(*args)

Bases: object

Parameters

Func –

type Func

Approx_SweepFunction

rtype

None

Average2dError()

• returns the average error of the <Index> 2d curve approximation.

  param Index

  type Index

  int

  rtype

  float

AverageErrorOnSurf()

• returns the average error in the suface approximation.

  rtype

  float

Curve2d()

Parameters

Index –

type Index

int

param TPoles

type TPoles

TColgp_Array1OfPnt2d

param TKnots

type TKnots

TColStd_Array1OfReal

param TMults

type TMults

TColStd_Array1OfInteger

rtype

None

Curve2dPoles()

Parameters

Index –

type Index

int

rtype

TColgp_Array1OfPnt2d

Curves2dDegree()

Return type

int

Curves2dKnots()

Return type

TColStd_Array1OfReal

Curves2dMults()

Return type

TColStd_Array1OfInteger

Curves2dShape()

Parameters

Degree –

type Degree

int

param NbPoles

type NbPoles

int

param NbKnots

type NbKnots

int

rtype

None

DumpToString(Approx_SweepApproximation self) → std::string

Eval()

• The EvaluatorFunction from AdvApprox;

  param Parameter

  type Parameter

  float

  param DerivativeRequest

  type DerivativeRequest

  int

  param First

  type First

  float

  param Last

  type Last

  float

  param Result

  type Result

  float

  rtype

  int

IsDone()

• returns if we have an result

  rtype

  bool

Max2dError()

• returns the maximum error of the <Index> 2d curve approximation.

  param Index

  type Index

  int

  rtype

  float

MaxErrorOnSurf()

• returns the maximum error in the suface approximation.

  rtype

  float

NbCurves2d()

Return type

int

Perform()

• Perform the Approximation [First, Last]Approx_SweepApproximation.cdl Tol3dTolerance to surface approximation Tol2dTolerance used to perform curve approximation Normaly the 2d curve are approximated with a tolerance given by the resolution on support surfaces, but if this tolerance is too large Tol2d is used. TolAngularTolerance (in radian) to control the angle beetween tangents on the section law and tangent of iso-v on approximed surface ContinuityThe continuity in v waiting on the surface DegmaxThe maximum degree in v requiered on the surface SegmaxThe maximum number of span in v requiered on the surface WarningThe continuity ci can be obtained only if Ft is Ci

  param First

  type First

  float

  param Last

  type Last

  float

  param Tol3d

  type Tol3d

  float

  param BoundTol

  type BoundTol

  float

  param Tol2d

  type Tol2d

  float

  param TolAngular

  type TolAngular

  float

  param Continuity

  default value is GeomAbs_C0

  type Continuity

  GeomAbs_Shape

  param Degmax

  default value is 11

  type Degmax

  int

  param Segmax

  default value is 50

  type Segmax

  int

  rtype

  None

SurfPoles()

Return type

TColgp_Array2OfPnt

SurfShape()

Parameters

UDegree –

type UDegree

int

param VDegree

type VDegree

int

param NbUPoles

type NbUPoles

int

param NbVPoles

type NbVPoles

int

param NbUKnots

type NbUKnots

int

param NbVKnots

type NbVKnots

int

rtype

None

SurfUKnots()

Return type

TColStd_Array1OfReal

SurfUMults()

Return type

TColStd_Array1OfInteger

SurfVKnots()

Return type

TColStd_Array1OfReal

SurfVMults()

Return type

TColStd_Array1OfInteger

SurfWeights()

Return type

TColStd_Array2OfReal

Surface()

Parameters

TPoles –

type TPoles

TColgp_Array2OfPnt

param TWeights

type TWeights

TColStd_Array2OfReal

param TUKnots

type TUKnots

TColStd_Array1OfReal

param TVKnots

type TVKnots

TColStd_Array1OfReal

param TUMults

type TUMults

TColStd_Array1OfInteger

param TVMults

type TVMults

TColStd_Array1OfInteger

rtype

None

TolCurveOnSurf()

• returns the maximum 3d error of the <Index> 2d curve approximation on the Surface.

  param Index

  type Index

  int

  rtype

  float

UDegree()

Return type

int

VDegree()

Return type

int

property thisown

The membership flag

class Approx_SweepFunction(*args, **kwargs)

Bases: OCC.Core.Standard.Standard_Transient

• Empty constructor

Return type

None* Copy constructor – does nothing

Parameters

& (Standard_Transient) –

Return type

None

BarycentreOfSurf()

• Get the barycentre of Surface. An very poor estimation is sufficent. This information is usefull to perform well conditioned rational approximation. Warning: Used only if <self> IsRational

  rtype

  gp_Pnt

D0()

• compute the section for v = param

  param Param

  type Param

  float

  param First

  type First

  float

  param Last

  type Last

  float

  param Poles

  type Poles

  TColgp_Array1OfPnt

  param Poles2d

  type Poles2d

  TColgp_Array1OfPnt2d

  param Weigths

  type Weigths

  TColStd_Array1OfReal

  rtype

  bool

D1()

• compute the first derivative in v direction of the section for v = param WarningIt used only for C1 or C2 aproximation

  param Param

  type Param

  float

  param First

  type First

  float

  param Last

  type Last

  float

  param Poles

  type Poles

  TColgp_Array1OfPnt

  param DPoles

  type DPoles

  TColgp_Array1OfVec

  param Poles2d

  type Poles2d

  TColgp_Array1OfPnt2d

  param DPoles2d

  type DPoles2d

  TColgp_Array1OfVec2d

  param Weigths

  type Weigths

  TColStd_Array1OfReal

  param DWeigths

  type DWeigths

  TColStd_Array1OfReal

  rtype

  bool

D2()

• compute the second derivative in v direction of the section for v = param WarningIt used only for C2 aproximation

  param Param

  type Param

  float

  param First

  type First

  float

  param Last

  type Last

  float

  param Poles

  type Poles

  TColgp_Array1OfPnt

  param DPoles

  type DPoles

  TColgp_Array1OfVec

  param D2Poles

  type D2Poles

  TColgp_Array1OfVec

  param Poles2d

  type Poles2d

  TColgp_Array1OfPnt2d

  param DPoles2d

  type DPoles2d

  TColgp_Array1OfVec2d

  param D2Poles2d

  type D2Poles2d

  TColgp_Array1OfVec2d

  param Weigths

  type Weigths

  TColStd_Array1OfReal

  param DWeigths

  type DWeigths

  TColStd_Array1OfReal

  param D2Weigths

  type D2Weigths

  TColStd_Array1OfReal

  rtype

  bool

static DownCast(t)

GetMinimalWeight()

• Compute the minimal value of weight for each poles in all sections. This information is usefull to control error in rational approximation. Warning: Used only if <self> IsRational

  param Weigths

  type Weigths

  TColStd_Array1OfReal

  rtype

  void

GetTolerance()

• Returns the tolerance to reach in approximation to satisfy. BoundTol error at the Boundary AngleTol tangent error at the Boundary (in radian) SurfTol error inside the surface.

  param BoundTol

  type BoundTol

  float

  param SurfTol

  type SurfTol

  float

  param AngleTol

  type AngleTol

  float

  param Tol3d

  type Tol3d

  TColStd_Array1OfReal

  rtype

  void

Intervals()

• Stores in <T> the parameters bounding the intervals of continuity <S>. //! The array must provide enough room to accomodate for the parameters. i.e. T.Length() > NbIntervals()

  param T

  type T

  TColStd_Array1OfReal

  param S

  type S

  GeomAbs_Shape

  rtype

  void

IsRational()

• Returns if the sections are rationnal or not

  rtype

  bool

Knots()

• get the Knots of the section

  param TKnots

  type TKnots

  TColStd_Array1OfReal

  rtype

  void

MaximalSection()

• Returns the length of the greater section. This information is usefull to G1’s control. Warning: With an little value, approximation can be slower.

  rtype

  float

Mults()

• get the Multplicities of the section

  param TMults

  type TMults

  TColStd_Array1OfInteger

  rtype

  void

Nb2dCurves()

• get the number of 2d curves to approximate.

  rtype

  int

NbIntervals()

• Returns the number of intervals for continuity <S>. May be one if Continuity(me) >= <S>

  param S

  type S

  GeomAbs_Shape

  rtype

  int

Resolution()

• Returns the resolutions in the sub-space 2d <Index> This information is usfull to find an good tolerance in 2d approximation.

  param Index

  type Index

  int

  param Tol

  type Tol

  float

  param TolU

  type TolU

  float

  param TolV

  type TolV

  float

  rtype

  void

SectionShape()

• get the format of an section

  param NbPoles

  type NbPoles

  int

  param NbKnots

  type NbKnots

  int

  param Degree

  type Degree

  int

  rtype

  void

SetInterval()

• Sets the bounds of the parametric interval on the fonction This determines the derivatives in these values if the function is not Cn.

  param First

  type First

  float

  param Last

  type Last

  float

  rtype

  void

SetTolerance()

• Is usefull, if (me) have to run numerical algorithm to perform D0, D1 or D2

  param Tol3d

  type Tol3d

  float

  param Tol2d

  type Tol2d

  float

  rtype

  void

property thisown

The membership flag

class SwigPyIterator(*args, **kwargs)

Bases: object

advance()

copy()

decr()

distance()

equal()

incr()

next()

previous()

property thisown

The membership flag

value()