OCC.GeomLib module

Geom Library. This package provides animplementation of functions for basic computationon geometric entity from packages Geom and Geom2d.

class GeomLib_Array1OfMat(*args)

Bases: object

Parameters:
  • Low (int) –
  • Up (int) –
  • Item (gp_Mat) –
  • Low –
  • Up –
Return type:

None
Return type:

None
Assign()
Parameters:Other (GeomLib_Array1OfMat &) –
Return type:GeomLib_Array1OfMat
ChangeValue()
Parameters:Index (int) –
Return type:gp_Mat
Destroy()
Return type:None
Init()
Parameters:V (gp_Mat) –
Return type:None
IsAllocated()
Return type:bool
Length()
Return type:int
Lower()
Return type:int
Set()
Parameters:Other (GeomLib_Array1OfMat &) –
Return type:GeomLib_Array1OfMat
SetValue()
Parameters:
Return type:

None
Upper()
Return type:int
Value()
Parameters:Index (int) –
Return type:gp_Mat
thisown

The membership flag

class GeomLib_Check2dBSplineCurve(*args)

Bases: object

Parameters:
  • Curve (Handle_Geom2d_BSplineCurve &) –
  • Tolerance (float) –
  • AngularTolerance (float) –
Return type:

None
FixTangent()
Parameters:
  • FirstFlag (bool) –
  • LastFlag (bool) –
Return type:

None
FixedTangent()
  • modifies the curve by fixing the first or the last tangencies //! if Index3D not in the Range [1,Nb3dSpaces] if the Approx is not Done
Parameters:
  • FirstFlag (bool) –
  • LastFlag (bool) –
Return type:

Handle_Geom2d_BSplineCurve
IsDone()
Return type:bool
NeedTangentFix()
Parameters:
  • FirstFlag (bool) –
  • SecondFlag (bool) –
Return type:

None
thisown

The membership flag

class GeomLib_CheckBSplineCurve(*args)

Bases: object

Parameters:
  • Curve (Handle_Geom_BSplineCurve &) –
  • Tolerance (float) –
  • AngularTolerance (float) –
Return type:

None
FixTangent()
Parameters:
  • FirstFlag (bool) –
  • LastFlag (bool) –
Return type:

None
FixedTangent()
  • modifies the curve by fixing the first or the last tangencies //! if Index3D not in the Range [1,Nb3dSpaces] if the Approx is not Done
Parameters:
  • FirstFlag (bool) –
  • LastFlag (bool) –
Return type:

Handle_Geom_BSplineCurve
IsDone()
Return type:bool
NeedTangentFix()
Parameters:
  • FirstFlag (bool) –
  • SecondFlag (bool) –
Return type:

None
thisown

The membership flag

class GeomLib_DenominatorMultiplier(*args)

Bases: object

  • if the surface is rational this will define the evaluator of a real function of 2 variables a(u,v) such that if we define a new surface by : a(u,v) * N(u,v) NewF(u,v) = —————- a(u,v) * D(u,v)
Parameters:
  • Surface (Handle_Geom_BSplineSurface &) –
  • KnotVector (TColStd_Array1OfReal &) –
Return type:

None
Value()
  • Returns the value of a(UParameter,VParameter)= //! H0(UParameter)/Denominator(Umin,Vparameter) //! D Denominator(Umin,Vparameter) - ——————————[H1(u)]/(Denominator(Umin,Vparameter)^2) D U //! + H3(UParameter)/Denominator(Umax,Vparameter) //! D Denominator(Umax,Vparameter) - ——————————[H2(u)]/(Denominator(Umax,Vparameter)^2) D U
Parameters:
Return type:

float
thisown

The membership flag

class GeomLib_Interpolate(*args)

Bases: object

Parameters:
Return type:

None
Curve()
  • returns the interpolated curve of the requested degree
Return type:Handle_Geom_BSplineCurve
Error()
  • returns the error type if any
Return type:GeomLib_InterpolationErrors
IsDone()
  • returns if everything went OK
Return type:bool
thisown

The membership flag

class GeomLib_IsPlanarSurface(*args)

Bases: object

Parameters:
  • S (Handle_Geom_Surface &) –
  • Tol (float) – default value is 1.0e-7
Return type:

None
IsPlanar()
  • Return if the Surface is a plan
Return type:bool
Plan()
  • Return the plan definition
Return type:gp_Pln
thisown

The membership flag

class GeomLib_LogSample(*args)

Bases: OCC.math.math_FunctionSample

Parameters:
Return type:

None
thisown

The membership flag

class GeomLib_MakeCurvefromApprox(*args)

Bases: object

Parameters:Approx (AdvApprox_ApproxAFunction &) –
Return type:None
Curve()
  • returns a polynomial curve whose poles correspond to the Index3D 3D space if Index3D not in the Range [1,Nb3dSpaces] if the Approx is not Done
Parameters:Index3d (int) –
Return type:Handle_Geom_BSplineCurve
  • returns a rational curve whose poles correspond to the index3D of the 3D space and whose weights correspond to the index1d 1D space. if Index1D not in the Range [1,Nb1dSpaces] if Index3D not in the Range [1,Nb3dSpaces] if the Approx is not Done
Parameters:
  • Index1D (int) –
  • Index3D (int) –
Return type:

Handle_Geom_BSplineCurve
Curve2d()
  • returns a polynomial curve whose poles correspond to the Index2d 2D space if Index2d not in the Range [1,Nb2dSpaces] if the Approx is not Done
Parameters:Index2d (int) –
Return type:Handle_Geom2d_BSplineCurve
  • returns a rational curve whose poles correspond to the index2d of the 2D space and whose weights correspond to one dimensional space of index 1d if Index1d not in the Range [1,Nb1dSpaces] if Index2d not in the Range [1,Nb2dSpaces] if the Approx is not Done
Parameters:
  • Index1d (int) –
  • Index2d (int) –
Return type:

Handle_Geom2d_BSplineCurve
Curve2dFromTwo1d()
  • returns a 2D curve building it from the 1D curve in x at Index1d and y at Index2d amongst the 1D curves if Index1d not in the Range [1,Nb1dSpaces] if Index2d not in the Range [1,Nb1dSpaces] if the Approx is not Done
Parameters:
  • Index1d (int) –
  • Index2d (int) –
Return type:

Handle_Geom2d_BSplineCurve
IsDone()
Return type:bool
Nb1DSpaces()
  • returns the number of 1D spaces of the Approx
Return type:int
Nb2DSpaces()
  • returns the number of 3D spaces of the Approx
Return type:int
Nb3DSpaces()
  • returns the number of 3D spaces of the Approx
Return type:int
thisown

The membership flag

class GeomLib_PolyFunc(*args)

Bases: OCC.math.math_FunctionWithDerivative

Parameters:Coeffs (math_Vector &) –
Return type:None
thisown

The membership flag

class GeomLib_Tool

Bases: object

static Parameter()
  • Extracts the parameter of a 3D point lying on a 3D curve or at a distance less than the tolerance value.
Parameters:
  • Curve (Handle_Geom_Curve &) –
  • Point (gp_Pnt) –
  • Tolerance (float) –
  • U (float &) –
Return type:

bool
  • Extracts the parameter of a 2D point lying on a 2D curve or at a distance less than the tolerance value.
Parameters:
  • Curve (Handle_Geom2d_Curve &) –
  • Point (gp_Pnt2d) –
  • Tolerance (float) –
  • U (float &) –
Return type:

bool
static Parameters()
  • Extracts the parameter of a 3D point lying on a surface or at a distance less than the tolerance value.
Parameters:
  • Surface (Handle_Geom_Surface &) –
  • Point (gp_Pnt) –
  • Tolerance (float) –
  • U (float &) –
  • V (float &) –
Return type:

bool
thisown

The membership flag

GeomLib_Tool_Parameter()
  • Extracts the parameter of a 3D point lying on a 3D curve or at a distance less than the tolerance value.
Parameters:
  • Curve (Handle_Geom_Curve &) –
  • Point (gp_Pnt) –
  • Tolerance (float) –
  • U (float &) –
Return type:

bool
  • Extracts the parameter of a 2D point lying on a 2D curve or at a distance less than the tolerance value.
Parameters:
  • Curve (Handle_Geom2d_Curve &) –
  • Point (gp_Pnt2d) –
  • Tolerance (float) –
  • U (float &) –
Return type:

bool
GeomLib_Tool_Parameters()
  • Extracts the parameter of a 3D point lying on a surface or at a distance less than the tolerance value.
Parameters:
  • Surface (Handle_Geom_Surface &) –
  • Point (gp_Pnt) –
  • Tolerance (float) –
  • U (float &) –
  • V (float &) –
Return type:

bool
class SwigPyIterator(*args, **kwargs)

Bases: object

advance()
copy()
decr()
distance()
equal()
incr()
next()
previous()
thisown

The membership flag

value()
class geomlib

Bases: object

static AdjustExtremity()
Parameters:
Return type:

void
static AxeOfInertia()
  • Compute axes of inertia, of some points – – – <Axe>.Location() is the BaryCentre – – – – – <Axe>.XDirection is the axe of upper inertia – – – – <Axe>.Direction is the Normal to the average plane – – – IsSingular is True if points are on line – Tol is used to determine singular cases.
Parameters:
Return type:

void
static BuildCurve3d()
Parameters:
  • Tolerance (float) –
  • CurvePtr (Adaptor3d_CurveOnSurface &) –
  • FirstParameter (float) –
  • LastParameter (float) –
  • NewCurvePtr (Handle_Geom_Curve &) –
  • MaxDeviation (float &) –
  • AverageDeviation (float &) –
  • Continuity (GeomAbs_Shape) – default value is GeomAbs_C1
  • MaxDegree (int) – default value is 14
  • MaxSegment (int) – default value is 30
Return type:

void
static CancelDenominatorDerivative()
  • Cancel,on the boudaries,the denominator first derivative in the directions wished by the user and set its value to 1.
Parameters:
  • BSurf (Handle_Geom_BSplineSurface &) –
  • UDirection (bool) –
  • VDirection (bool) –
Return type:

void
static DensifyArray1OfReal()
  • this makes sure that there is at least MinNumPoints in OutParameters taking into account the parameters in the InParameters array provided those are in order, that is the sequence of real in the InParameter is strictly non decreasing
Parameters:
  • MinNumPoints (int) –
  • InParameters (TColStd_Array1OfReal &) –
  • OutParameters (Handle_TColStd_HArray1OfReal &) –
Return type:

void
static EvalMaxDistanceAlongParameter()
  • this will compute the maximum distancef at the parameters given in the Parameters array by projecting from the Curve to the reference curve and taking the minimum distance Than the maximum will be taken on those minimas.
Parameters:
  • Curve (Adaptor3d_Curve &) –
  • AReferenceCurve (Adaptor3d_Curve &) –
  • Tolerance (float) –
  • Parameters (TColStd_Array1OfReal &) –
  • MaxDistance (float &) –
Return type:

void
static EvalMaxParametricDistance()
  • this will compute the maximum distance at the parameters given in the Parameters array by evaluating each parameter the two curves and taking the maximum of the evaluated distance
Parameters:
  • Curve (Adaptor3d_Curve &) –
  • AReferenceCurve (Adaptor3d_Curve &) –
  • Tolerance (float) –
  • Parameters (TColStd_Array1OfReal &) –
  • MaxDistance (float &) –
Return type:

void
static ExtendCurveToPoint()
  • Extends the bounded curve Curve to the point Point. The extension is built: - at the end of the curve if After equals true, or - at the beginning of the curve if After equals false. The extension is performed according to a degree of continuity equal to Cont, which in its turn must be equal to 1, 2 or 3. This function converts the bounded curve Curve into a BSpline curve. Warning - Nothing is done, and Curve is not modified if Cont is not equal to 1, 2 or 3. - It is recommended that the extension should not be too large with respect to the size of the bounded curve Curve: Point must not be located too far from one of the extremities of Curve.
Parameters:
  • Curve (Handle_Geom_BoundedCurve &) –
  • Point (gp_Pnt) –
  • Cont (int) –
  • After (bool) –
Return type:

void
static ExtendSurfByLength()
  • Extends the bounded surface Surf along one of its boundaries. The chord length of the extension is equal to Length. The direction of the extension is given as: - the u parametric direction of Surf, if InU equals true, or - the v parametric direction of Surf, if InU equals false. In this parametric direction, the extension is built on the side of: - the last parameter of Surf, if After equals true, or - the first parameter of Surf, if After equals false. The extension is performed according to a degree of continuity equal to Cont, which in its turn must be equal to 1, 2 or 3. This function converts the bounded surface Surf into a BSpline surface. Warning - Nothing is done, and Surf is not modified if Cont is not equal to 1, 2 or 3. - It is recommended that Length, the size of the extension should not be too large with respect to the size of the bounded surface Surf. - Surf must not be a periodic BSpline surface in the parametric direction corresponding to the direction of extension.
Parameters:
  • Surf (Handle_Geom_BoundedSurface &) –
  • Length (float) –
  • Cont (int) –
  • InU (bool) –
  • After (bool) –
Return type:

void
static FuseIntervals()
Parameters:
  • Interval1 (TColStd_Array1OfReal &) –
  • Interval2 (TColStd_Array1OfReal &) –
  • Fusion (TColStd_SequenceOfReal &) –
  • Confusion (float) – default value is 1.0e-9
Return type:

void
static GTransform()
  • Computes the curve 3d from package Geom corresponding to the curve 3d from package Geom, transformed with the transformation <GTrsf> WARNING : this method may return a null Handle if it’s impossible to compute the transformation of a curve. It’s not implemented when : 1) the curve is an infinite parabola or hyperbola 2) the curve is an offsetcurve
Parameters:
  • Curve (Handle_Geom2d_Curve &) –
  • GTrsf (gp_GTrsf2d) –
Return type:

Handle_Geom2d_Curve
static Inertia()
  • Compute principale axes of inertia, and dispertion value of some points.
Parameters:
Return type:

void
static NormEstim()
Parameters:
Return type:

int
static RemovePointsFromArray()
  • Warning! This assume that the InParameter is an increasing sequence of real number and it will not check for that : Unpredictable result can happen if this is not satisfied. It is the caller responsability to check for that property. //! This method makes uniform NumPoints segments S1,…SNumPoints out of the segment defined by the first parameter and the last parameter ofthe InParameter ; keeps only one point of the InParameters set of parameter in each of the uniform segments taking care of the first and the last parameters. For the ith segment the element of the InParameter is the one that is the first to exceed the midpoint of the segment and to fall before the midpoint of the next segment There will be at the end at most NumPoints + 1 if NumPoints > 2 in the OutParameters Array
Parameters:
  • NumPoints (int) –
  • InParameters (TColStd_Array1OfReal &) –
  • OutParameters (Handle_TColStd_HArray1OfReal &) –
Return type:

void
static SameRange()
  • Make the curve Curve2dPtr have the imposed range First to List the most economic way, that is if it can change the range without changing the nature of the curve it will try to do that. Otherwise it will produce a Bspline curve that has the required range
Parameters:
  • Tolerance (float) –
  • Curve2dPtr (Handle_Geom2d_Curve &) –
  • First (float) –
  • Last (float) –
  • RequestedFirst (float) –
  • RequestedLast (float) –
  • NewCurve2dPtr (Handle_Geom2d_Curve &) –
Return type:

void
static To3d()
  • Computes the curve 3d from package Geom corresponding to curve 2d from package Geom2d, on the plan defined with the local coordinate system Position.
Parameters:
  • Position (gp_Ax2) –
  • Curve2d (Handle_Geom2d_Curve &) –
Return type:

Handle_Geom_Curve
thisown

The membership flag

geomlib_AdjustExtremity()
Parameters:
Return type:

void
geomlib_AxeOfInertia()
  • Compute axes of inertia, of some points – – – <Axe>.Location() is the BaryCentre – – – – – <Axe>.XDirection is the axe of upper inertia – – – – <Axe>.Direction is the Normal to the average plane – – – IsSingular is True if points are on line – Tol is used to determine singular cases.
Parameters:
Return type:

void
geomlib_BuildCurve3d()
Parameters:
  • Tolerance (float) –
  • CurvePtr (Adaptor3d_CurveOnSurface &) –
  • FirstParameter (float) –
  • LastParameter (float) –
  • NewCurvePtr (Handle_Geom_Curve &) –
  • MaxDeviation (float &) –
  • AverageDeviation (float &) –
  • Continuity (GeomAbs_Shape) – default value is GeomAbs_C1
  • MaxDegree (int) – default value is 14
  • MaxSegment (int) – default value is 30
Return type:

void
geomlib_CancelDenominatorDerivative()
  • Cancel,on the boudaries,the denominator first derivative in the directions wished by the user and set its value to 1.
Parameters:
  • BSurf (Handle_Geom_BSplineSurface &) –
  • UDirection (bool) –
  • VDirection (bool) –
Return type:

void
geomlib_DensifyArray1OfReal()
  • this makes sure that there is at least MinNumPoints in OutParameters taking into account the parameters in the InParameters array provided those are in order, that is the sequence of real in the InParameter is strictly non decreasing
Parameters:
  • MinNumPoints (int) –
  • InParameters (TColStd_Array1OfReal &) –
  • OutParameters (Handle_TColStd_HArray1OfReal &) –
Return type:

void
geomlib_EvalMaxDistanceAlongParameter()
  • this will compute the maximum distancef at the parameters given in the Parameters array by projecting from the Curve to the reference curve and taking the minimum distance Than the maximum will be taken on those minimas.
Parameters:
  • Curve (Adaptor3d_Curve &) –
  • AReferenceCurve (Adaptor3d_Curve &) –
  • Tolerance (float) –
  • Parameters (TColStd_Array1OfReal &) –
  • MaxDistance (float &) –
Return type:

void
geomlib_EvalMaxParametricDistance()
  • this will compute the maximum distance at the parameters given in the Parameters array by evaluating each parameter the two curves and taking the maximum of the evaluated distance
Parameters:
  • Curve (Adaptor3d_Curve &) –
  • AReferenceCurve (Adaptor3d_Curve &) –
  • Tolerance (float) –
  • Parameters (TColStd_Array1OfReal &) –
  • MaxDistance (float &) –
Return type:

void
geomlib_ExtendCurveToPoint()
  • Extends the bounded curve Curve to the point Point. The extension is built: - at the end of the curve if After equals true, or - at the beginning of the curve if After equals false. The extension is performed according to a degree of continuity equal to Cont, which in its turn must be equal to 1, 2 or 3. This function converts the bounded curve Curve into a BSpline curve. Warning - Nothing is done, and Curve is not modified if Cont is not equal to 1, 2 or 3. - It is recommended that the extension should not be too large with respect to the size of the bounded curve Curve: Point must not be located too far from one of the extremities of Curve.
Parameters:
  • Curve (Handle_Geom_BoundedCurve &) –
  • Point (gp_Pnt) –
  • Cont (int) –
  • After (bool) –
Return type:

void
geomlib_ExtendSurfByLength()
  • Extends the bounded surface Surf along one of its boundaries. The chord length of the extension is equal to Length. The direction of the extension is given as: - the u parametric direction of Surf, if InU equals true, or - the v parametric direction of Surf, if InU equals false. In this parametric direction, the extension is built on the side of: - the last parameter of Surf, if After equals true, or - the first parameter of Surf, if After equals false. The extension is performed according to a degree of continuity equal to Cont, which in its turn must be equal to 1, 2 or 3. This function converts the bounded surface Surf into a BSpline surface. Warning - Nothing is done, and Surf is not modified if Cont is not equal to 1, 2 or 3. - It is recommended that Length, the size of the extension should not be too large with respect to the size of the bounded surface Surf. - Surf must not be a periodic BSpline surface in the parametric direction corresponding to the direction of extension.
Parameters:
  • Surf (Handle_Geom_BoundedSurface &) –
  • Length (float) –
  • Cont (int) –
  • InU (bool) –
  • After (bool) –
Return type:

void
geomlib_FuseIntervals()
Parameters:
  • Interval1 (TColStd_Array1OfReal &) –
  • Interval2 (TColStd_Array1OfReal &) –
  • Fusion (TColStd_SequenceOfReal &) –
  • Confusion (float) – default value is 1.0e-9
Return type:

void
geomlib_GTransform()
  • Computes the curve 3d from package Geom corresponding to the curve 3d from package Geom, transformed with the transformation <GTrsf> WARNING : this method may return a null Handle if it’s impossible to compute the transformation of a curve. It’s not implemented when : 1) the curve is an infinite parabola or hyperbola 2) the curve is an offsetcurve
Parameters:
  • Curve (Handle_Geom2d_Curve &) –
  • GTrsf (gp_GTrsf2d) –
Return type:

Handle_Geom2d_Curve
geomlib_Inertia()
  • Compute principale axes of inertia, and dispertion value of some points.
Parameters:
Return type:

void
geomlib_NormEstim()
Parameters:
Return type:

int
geomlib_RemovePointsFromArray()
  • Warning! This assume that the InParameter is an increasing sequence of real number and it will not check for that : Unpredictable result can happen if this is not satisfied. It is the caller responsability to check for that property. //! This method makes uniform NumPoints segments S1,…SNumPoints out of the segment defined by the first parameter and the last parameter ofthe InParameter ; keeps only one point of the InParameters set of parameter in each of the uniform segments taking care of the first and the last parameters. For the ith segment the element of the InParameter is the one that is the first to exceed the midpoint of the segment and to fall before the midpoint of the next segment There will be at the end at most NumPoints + 1 if NumPoints > 2 in the OutParameters Array
Parameters:
  • NumPoints (int) –
  • InParameters (TColStd_Array1OfReal &) –
  • OutParameters (Handle_TColStd_HArray1OfReal &) –
Return type:

void
geomlib_SameRange()
  • Make the curve Curve2dPtr have the imposed range First to List the most economic way, that is if it can change the range without changing the nature of the curve it will try to do that. Otherwise it will produce a Bspline curve that has the required range
Parameters:
  • Tolerance (float) –
  • Curve2dPtr (Handle_Geom2d_Curve &) –
  • First (float) –
  • Last (float) –
  • RequestedFirst (float) –
  • RequestedLast (float) –
  • NewCurve2dPtr (Handle_Geom2d_Curve &) –
Return type:

void
geomlib_To3d()
  • Computes the curve 3d from package Geom corresponding to curve 2d from package Geom2d, on the plan defined with the local coordinate system Position.
Parameters:
  • Position (gp_Ax2) –
  • Curve2d (Handle_Geom2d_Curve &) –
Return type:

Handle_Geom_Curve
new_instancemethod(func, inst, cls)
register_handle(handle, base_object)

Inserts the handle into the base object to prevent memory corruption in certain cases