OCC.Geom module

  • Purpose :This package contains the definition of the geometric objectssuch as point, vector, axis placement, curves, surfaces and thedescription of the geometric transformations available for theseobjects.All these entities are defined in 3D space.This package gives the possibility :. to create geometric objects,. to have information about them,. to modify these objects.This package uses the services of the package gp (Geometricprocessor) which describes non-persistent objects for algebraiccalculus and basic analytic geometry. The purpose of this packageis to create persistent geometric objects and to read geometricinformation about these objects. Complexes geometric algorithmesare not described in this package. At construction time,elementary verifications are done to verify that the objectsare coherents, but some verifications which require complexalgorithmes (for example to check that a curve has not nulllength or does not self-intersect) must be done before theconstruction of the geometric objects.
class Geom_Axis1Placement(*args)

Bases: OCC.Geom.Geom_AxisPlacement

  • Returns a transient copy of A1.
Parameters:A1 (gp_Ax1) –
Return type:None
  • P is the origin of the axis placement and V is the direction of the axis placement.
Parameters:
Return type:

None
Ax1()
  • Returns a non transient copy of <self>.
Return type:gp_Ax1
GetHandle()
Reverse()
  • Reverses the direction of the axis placement.
Return type:None
Reversed()
  • Returns a copy of <self> reversed.
Return type:Handle_Geom_Axis1Placement
thisown

The membership flag

class Geom_Axis2Placement(*args)

Bases: OCC.Geom.Geom_AxisPlacement

  • Returns a transient copy of A2.
Parameters:A2 (gp_Ax2) –
Return type:None
  • P is the origin of the axis placement, N is the main direction of the axis placement and Vx is the ‘XDirection’. If the two directions N and Vx are not orthogonal the ‘XDirection’ is computed as follow : XDirection = N ^ (Vx ^ N). Raised if N and Vx are parallel.
Parameters:
Return type:

None
Ax2()
  • Returns a non transient copy of <self>.
Return type:gp_Ax2
GetHandle()
SetAx2()
  • Assigns the origin and the three unit vectors of A2 to this coordinate system.
Parameters:A2 (gp_Ax2) –
Return type:None
SetXDirection()
  • Changes the ‘XDirection’ of the axis placement, Vx is the new ‘XDirection’. If Vx is not normal to the main direction then ‘XDirection’ is computed as follow : XDirection = Direction ^ ( Vx ^ Direction). The main direction is not modified. Raised if Vx and ‘Direction’ are parallel.
Parameters:Vx (gp_Dir) –
Return type:None
SetYDirection()
  • Changes the ‘YDirection’ of the axis placement, Vy is the new ‘YDirection’. If Vy is not normal to the main direction then ‘YDirection’ is computed as follow : YDirection = Direction ^ ( Vy ^ Direction). The main direction is not modified. The ‘XDirection’ is modified. Raised if Vy and the main direction are parallel.
Parameters:Vy (gp_Dir) –
Return type:None
XDirection()
  • Returns the ‘XDirection’. This is a unit vector.
Return type:gp_Dir
YDirection()
  • Returns the ‘YDirection’. This is a unit vector.
Return type:gp_Dir
thisown

The membership flag

class Geom_AxisPlacement(*args, **kwargs)

Bases: OCC.Geom.Geom_Geometry

Angle()
  • Computes the angular value, in radians, between the ‘main Direction’ of this positioning system and that of positioning system Other. The result is a value between 0 and Pi.
Parameters:Other (Handle_Geom_AxisPlacement &) –
Return type:float
Axis()
  • Returns the main axis of the axis placement. For an ‘Axis2placement’ it is the main axis (Location, Direction ). For an ‘Axis1Placement’ this method returns a copy of <self>.
Return type:gp_Ax1
Direction()
  • Returns the main ‘Direction’ of an axis placement.
Return type:gp_Dir
GetHandle()
Location()
  • Returns the Location point (origin) of the axis placement.
Return type:gp_Pnt
SetAxis()
  • Assigns A1 as the ‘main Axis’ of this positioning system. This modifies - its origin, and - its ‘main Direction’. If this positioning system is a Geom_Axis2Placement, then its ‘X Direction’ and ‘Y Direction’ are recomputed. Exceptions For a Geom_Axis2Placement: Standard_ConstructionError if A1 and the previous ‘X Direction’ of the coordinate system are parallel.
Parameters:A1 (gp_Ax1) –
Return type:None
SetDirection()
  • Changes the direction of the axis placement. If <self> is an axis placement two axis the main ‘Direction’ is modified and the ‘XDirection’ and ‘YDirection’ are recomputed. Raises ConstructionError only for an axis placement two axis if V and the previous ‘XDirection’ are parallel because it is not possible to calculate the new ‘XDirection’ and the new ‘YDirection’.
Parameters:V (gp_Dir) –
Return type:void
SetLocation()
  • Assigns the point P as the origin of this positioning system.
Parameters:P (gp_Pnt) –
Return type:None
thisown

The membership flag

class Geom_BSplineCurve(*args)

Bases: OCC.Geom.Geom_BoundedCurve

  • Creates a non-rational B_spline curve on the basis <Knots, Multiplicities> of degree <Degree>.
Parameters:
  • Poles (TColgp_Array1OfPnt) –
  • Knots (TColStd_Array1OfReal &) –
  • Multiplicities (TColStd_Array1OfInteger &) –
  • Degree (int) –
  • Periodic (bool) – default value is Standard_False
Return type:

None
  • Creates a rational B_spline curve on the basis <Knots, Multiplicities> of degree <Degree>. Raises ConstructionError subject to the following conditions 0 < Degree <= MaxDegree. //! Weights.Length() == Poles.Length() //! Knots.Length() == Mults.Length() >= 2 //! Knots(i) < Knots(i+1) (Knots are increasing) //! 1 <= Mults(i) <= Degree //! On a non periodic curve the first and last multiplicities may be Degree+1 (this is even recommanded if you want the curve to start and finish on the first and last pole). //! On a periodic curve the first and the last multicities must be the same. //! on non-periodic curves //! Poles.Length() == Sum(Mults(i)) - Degree - 1 >= 2 //! on periodic curves //! Poles.Length() == Sum(Mults(i)) except the first or last
Parameters:
  • Poles (TColgp_Array1OfPnt) –
  • Weights (TColStd_Array1OfReal &) –
  • Knots (TColStd_Array1OfReal &) –
  • Multiplicities (TColStd_Array1OfInteger &) –
  • Degree (int) –
  • Periodic (bool) – default value is Standard_False
  • CheckRational (bool) – default value is Standard_True
Return type:

None
Degree()
  • Returns the degree of this BSpline curve. The degree of a Geom_BSplineCurve curve cannot be greater than Geom_BSplineCurve::MaxDegree(). Computation of value and derivatives
Return type:int
FirstUKnotIndex()
  • Returns the index in the knot array of the knot corresponding to the first or last parameter of this BSpline curve. For a BSpline curve, the first (or last) parameter (which gives the start (or end) point of the curve) is a knot value. However, if the multiplicity of the first (or last) knot is less than Degree + 1, where Degree is the degree of the curve, it is not the first (or last) knot of the curve.
Return type:int
GetHandle()
IncreaseDegree()
  • Increases the degree of this BSpline curve to Degree. As a result, the poles, weights and multiplicities tables are modified; the knots table is not changed. Nothing is done if Degree is less than or equal to the current degree. Exceptions Standard_ConstructionError if Degree is greater than Geom_BSplineCurve::MaxDegree().
Parameters:Degree (int) –
Return type:None
IncreaseMultiplicity()
  • Increases the multiplicity of the knot <Index> to <M>. //! If <M> is lower or equal to the current multiplicity nothing is done. If <M> is higher than the degree the degree is used. If <Index> is not in [FirstUKnotIndex, LastUKnotIndex]
Parameters:
Return type:

None
  • Increases the multiplicities of the knots in [I1,I2] to <M>. //! For each knot if <M> is lower or equal to the current multiplicity nothing is done. If <M> is higher than the degree the degree is used. If <I1,I2> are not in [FirstUKnotIndex, LastUKnotIndex]
Parameters:
Return type:

None
IncrementMultiplicity()
  • Increment the multiplicities of the knots in [I1,I2] by <M>. //! If <M> is not positive nithing is done. //! For each knot the resulting multiplicity is limited to the Degree. If <I1,I2> are not in [FirstUKnotIndex, LastUKnotIndex]
Parameters:
Return type:

None
InsertKnot()
  • Inserts a knot value in the sequence of knots. If <U> is an existing knot the multiplicity is increased by <M>. //! If U is not on the parameter range nothing is done. //! If the multiplicity is negative or null nothing is done. The new multiplicity is limited to the degree. //! The tolerance criterion for knots equality is the max of Epsilon(U) and ParametricTolerance.
Parameters:
  • U (float) –
  • M (int) – default value is 1
  • ParametricTolerance (float) – default value is 0.0
  • Add (bool) – default value is Standard_True
Return type:

None
InsertKnots()
  • Inserts a set of knots values in the sequence of knots. //! For each U = Knots(i), M = Mults(i) //! If <U> is an existing knot the multiplicity is increased by <M> if <Add> is True, increased to <M> if <Add> is False. //! If U is not on the parameter range nothing is done. //! If the multiplicity is negative or null nothing is done. The new multiplicity is limited to the degree. //! The tolerance criterion for knots equality is the max of Epsilon(U) and ParametricTolerance.
Parameters:
  • Knots (TColStd_Array1OfReal &) –
  • Mults (TColStd_Array1OfInteger &) –
  • ParametricTolerance (float) – default value is 0.0
  • Add (bool) – default value is Standard_False
Return type:

None
IsEqual()
  • Comapare two Bspline curve on identity;
Parameters:
  • theOther (Handle_Geom_BSplineCurve &) –
  • thePreci (float) –
Return type:

bool
IsG1()
  • Check if curve has at least G1 continuity in interval [theTf, theTl] Returns true if IsCN(1) or angle betweem ‘left’ and ‘right’ first derivatives at knots with C0 continuity is less then theAngTol only knots in interval [theTf, theTl] is checked
Parameters:
Return type:

bool
IsRational()
  • Returns True if the weights are not identical. The tolerance criterion is Epsilon of the class Real.
Return type:bool
Knot()
  • Returns the knot of range Index. When there is a knot with a multiplicity greater than 1 the knot is not repeated. The method Multiplicity can be used to get the multiplicity of the Knot. Raised if Index < 1 or Index > NbKnots
Parameters:Index (int) –
Return type:float
KnotDistribution()
  • Returns NonUniform or Uniform or QuasiUniform or PiecewiseBezier. If all the knots differ by a positive constant from the preceding knot the BSpline Curve can be : - Uniform if all the knots are of multiplicity 1, - QuasiUniform if all the knots are of multiplicity 1 except for the first and last knot which are of multiplicity Degree + 1, - PiecewiseBezier if the first and last knots have multiplicity Degree + 1 and if interior knots have multiplicity Degree A piecewise Bezier with only two knots is a BezierCurve. else the curve is non uniform. The tolerance criterion is Epsilon from class Real.
Return type:GeomAbs_BSplKnotDistribution
KnotSequence()
  • Returns K, the knots sequence of this BSpline curve. In this sequence, knots with a multiplicity greater than 1 are repeated. In the case of a non-periodic curve the length of the sequence must be equal to the sum of the NbKnots multiplicities of the knots of the curve (where NbKnots is the number of knots of this BSpline curve). This sum is also equal to : NbPoles + Degree + 1 where NbPoles is the number of poles and Degree the degree of this BSpline curve. In the case of a periodic curve, if there are k periodic knots, the period is Knot(k+1) - Knot(1). The initial sequence is built by writing knots 1 to k+1, which are repeated according to their corresponding multiplicities. If Degree is the degree of the curve, the degree of continuity of the curve at the knot of index 1 (or k+1) is equal to c = Degree + 1 - Mult(1). c knots are then inserted at the beginning and end of the initial sequence: - the c values of knots preceding the first item Knot(k+1) in the initial sequence are inserted at the beginning; the period is subtracted from these c values; - the c values of knots following the last item Knot(1) in the initial sequence are inserted at the end; the period is added to these c values. The length of the sequence must therefore be equal to: NbPoles + 2*Degree - Mult(1) + 2. Example For a non-periodic BSpline curve of degree 2 where: - the array of knots is: { k1 k2 k3 k4 }, - with associated multiplicities: { 3 1 2 3 }, the knot sequence is: K = { k1 k1 k1 k2 k3 k3 k4 k4 k4 } For a periodic BSpline curve of degree 4 , which is ‘C1’ continuous at the first knot, and where : - the periodic knots are: { k1 k2 k3 (k4) } (3 periodic knots: the points of parameter k1 and k4 are identical, the period is p = k4 - k1), - with associated multiplicities: { 3 1 2 (3) }, the degree of continuity at knots k1 and k4 is: Degree + 1 - Mult(i) = 2. 2 supplementary knots are added at the beginning and end of the sequence: - at the beginning: the 2 knots preceding k4 minus the period; in this example, this is k3 - p both times; - at the end: the 2 knots following k1 plus the period; in this example, this is k2 + p and k3 + p. The knot sequence is therefore: K = { k3-p k3-p k1 k1 k1 k2 k3 k3 k4 k4 k4 k2+p k3+p } Exceptions Standard_DimensionError if the array K is not of the appropriate length.Returns the knots sequence.
Parameters:K (TColStd_Array1OfReal &) –
Return type:None
  • returns the knots of the B-spline curve. Knots with multiplicit greater than 1 are repeated
Return type:TColStd_Array1OfReal
Knots()
  • returns the knot values of the B-spline curve; Warning A knot with a multiplicity greater than 1 is not repeated in the knot table. The Multiplicity function can be used to obtain the multiplicity of each knot. //! Raised if the length of K is not equal to the number of knots.
Parameters:K (TColStd_Array1OfReal &) –
Return type:None
  • returns the knot values of the B-spline curve; Warning A knot with a multiplicity greater than 1 is not repeated in the knot table. The Multiplicity function can be used to obtain the multiplicity of each knot.
Return type:TColStd_Array1OfReal
LastUKnotIndex()
  • For a BSpline curve the last parameter (which gives the end point of the curve) is a knot value but if the multiplicity of the last knot index is lower than Degree + 1 it is not the last knot of the curve. This method computes the index of the knot corresponding to the last parameter.
Return type:int
LocalD0()
  • Raised if FromK1 = ToK2. //! Raised if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

None
LocalD1()
  • Raised if the local continuity of the curve is not C1 between the knot K1 and the knot K2. Raised if FromK1 = ToK2. //! Raised if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

None
LocalD2()
  • Raised if the local continuity of the curve is not C2 between the knot K1 and the knot K2. Raised if FromK1 = ToK2. //! Raised if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

None
LocalD3()
  • Raised if the local continuity of the curve is not C3 between the knot K1 and the knot K2. Raised if FromK1 = ToK2. //! Raised if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

None
LocalDN()
  • Raised if the local continuity of the curve is not CN between the knot K1 and the knot K2. Raised if FromK1 = ToK2. Raised if N < 1. //! Raises if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

gp_Vec
LocalValue()
  • Raised if FromK1 = ToK2. //! Raised if FromK1 and ToK2 are not in the range [FirstUKnotIndex, LastUKnotIndex].
Parameters:
Return type:

gp_Pnt
LocateU()
  • Locates the parametric value U in the sequence of knots. If ‘WithKnotRepetition’ is True we consider the knot’s representation with repetition of multiple knot value, otherwise we consider the knot’s representation with no repetition of multiple knot values. Knots (I1) <= U <= Knots (I2) . if I1 = I2 U is a knot value (the tolerance criterion ParametricTolerance is used). . if I1 < 1 => U < Knots (1) - Abs(ParametricTolerance) . if I2 > NbKnots => U > Knots (NbKnots) + Abs(ParametricTolerance)
Parameters:
  • U (float) –
  • ParametricTolerance (float) –
  • I1 (int &) –
  • I2 (int &) –
  • WithKnotRepetition (bool) – default value is Standard_False
Return type:

None
static MaxDegree()
  • Returns the value of the maximum degree of the normalized B-spline basis functions in this package.
Return type:int
MovePoint()
  • Moves the point of parameter U of this BSpline curve to P. Index1 and Index2 are the indexes in the table of poles of this BSpline curve of the first and last poles designated to be moved. FirstModifiedPole and LastModifiedPole are the indexes of the first and last poles which are effectively modified. In the event of incompatibility between Index1, Index2 and the value U: - no change is made to this BSpline curve, and - the FirstModifiedPole and LastModifiedPole are returned null. Exceptions Standard_OutOfRange if: - Index1 is greater than or equal to Index2, or - Index1 or Index2 is less than 1 or greater than the number of poles of this BSpline curve.
Parameters:
  • U (float) –
  • P (gp_Pnt) –
  • Index1 (int) –
  • Index2 (int) –
  • FirstModifiedPole (int &) –
  • LastModifiedPole (int &) –
Return type:

None
MovePointAndTangent()
  • Move a point with parameter U to P. and makes it tangent at U be Tangent. StartingCondition = -1 means first can move EndingCondition = -1 means last point can move StartingCondition = 0 means the first point cannot move EndingCondition = 0 means the last point cannot move StartingCondition = 1 means the first point and tangent cannot move EndingCondition = 1 means the last point and tangent cannot move and so forth ErrorStatus != 0 means that there are not enought degree of freedom with the constrain to deform the curve accordingly
Parameters:
  • U (float) –
  • P (gp_Pnt) –
  • Tangent (gp_Vec) –
  • Tolerance (float) –
  • StartingCondition (int) –
  • EndingCondition (int) –
  • ErrorStatus (int &) –
Return type:

None
Multiplicities()
  • Returns the multiplicity of the knots of the curve. //! Raised if the length of M is not equal to NbKnots.
Parameters:M (TColStd_Array1OfInteger &) –
Return type:None
  • returns the multiplicity of the knots of the curve.
Return type:TColStd_Array1OfInteger
Multiplicity()
  • Returns the multiplicity of the knots of range Index. Raised if Index < 1 or Index > NbKnots
Parameters:Index (int) –
Return type:int
NbKnots()
  • Returns the number of knots. This method returns the number of knot without repetition of multiple knots.
Return type:int
NbPoles()
  • Returns the number of poles
Return type:int
PeriodicNormalization()
  • returns the parameter normalized within the period if the curve is periodic : otherwise does not do anything
Parameters:U (float &) –
Return type:None
Pole()
  • Returns the pole of range Index. Raised if Index < 1 or Index > NbPoles.
Parameters:Index (int) –
Return type:gp_Pnt
Poles()
  • Returns the poles of the B-spline curve; //! Raised if the length of P is not equal to the number of poles.
Parameters:P (TColgp_Array1OfPnt) –
Return type:None
  • Returns the poles of the B-spline curve;
Return type:TColgp_Array1OfPnt
RemoveKnot()
  • Reduces the multiplicity of the knot of index Index to M. If M is equal to 0, the knot is removed. With a modification of this type, the array of poles is also modified. Two different algorithms are systematically used to compute the new poles of the curve. If, for each pole, the distance between the pole calculated using the first algorithm and the same pole calculated using the second algorithm, is less than Tolerance, this ensures that the curve is not modified by more than Tolerance. Under these conditions, true is returned; otherwise, false is returned. A low tolerance is used to prevent modification of the curve. A high tolerance is used to ‘smooth’ the curve. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table. pole insertion and pole removing this operation is limited to the Uniform or QuasiUniform BSplineCurve. The knot values are modified . If the BSpline is NonUniform or Piecewise Bezier an exception Construction error is raised.
Parameters:
Return type:

bool
Resolution()
  • Computes for this BSpline curve the parametric tolerance UTolerance for a given 3D tolerance Tolerance3D. If f(t) is the equation of this BSpline curve, UTolerance ensures that: | t1 - t0| < Utolerance ===> |f(t1) - f(t0)| < Tolerance3D
Parameters:
  • Tolerance3D (float) –
  • UTolerance (float &) –
Return type:

None
Segment()
  • Modifies this BSpline curve by segmenting it between U1 and U2. Either of these values can be outside the bounds of the curve, but U2 must be greater than U1. All data structure tables of this BSpline curve are modified, but the knots located between U1 and U2 are retained. The degree of the curve is not modified. Warnings : Even if <self> is not closed it can become closed after the segmentation for example if U1 or U2 are out of the bounds of the curve <self> or if the curve makes loop. After the segmentation the length of a curve can be null. raises if U2 < U1.
Parameters:
Return type:

None
SetKnot()
  • Modifies this BSpline curve by assigning the value K to the knot of index Index in the knots table. This is a relatively local modification because K must be such that: Knots(Index - 1) < K < Knots(Index + 1) The second syntax allows you also to increase the multiplicity of the knot to M (but it is not possible to decrease the multiplicity of the knot with this function). Standard_ConstructionError if: - K is not such that: Knots(Index - 1) < K < Knots(Index + 1) - M is greater than the degree of this BSpline curve or lower than the previous multiplicity of knot of index Index in the knots table. Standard_OutOfRange if Index is outside the bounds of the knots table.
Parameters:
Return type:

None
  • Changes the knot of range Index with its multiplicity. You can increase the multiplicity of a knot but it is not allowed to decrease the multiplicity of an existing knot. //! Raised if K >= Knots(Index+1) or K <= Knots(Index-1). Raised if M is greater than Degree or lower than the previous multiplicity of knot of range Index. Raised if Index < 1 || Index > NbKnots
Parameters:
Return type:

None
SetKnots()
  • Modifies this BSpline curve by assigning the array K to its knots table. The multiplicity of the knots is not modified. Exceptions Standard_ConstructionError if the values in the array K are not in ascending order. Standard_OutOfRange if the bounds of the array K are not respectively 1 and the number of knots of this BSpline curve.
Parameters:K (TColStd_Array1OfReal &) –
Return type:None
SetNotPeriodic()
  • Changes this BSpline curve into a non-periodic curve. If this curve is already non-periodic, it is not modified. Note: the poles and knots tables are modified. Warning If this curve is periodic, as the multiplicity of the first and last knots is not modified, and is not equal to Degree + 1, where Degree is the degree of this BSpline curve, the start and end points of the curve are not its first and last poles.
Return type:None
SetOrigin()
  • Assigns the knot of index Index in the knots table as the origin of this periodic BSpline curve. As a consequence, the knots and poles tables are modified. Exceptions Standard_NoSuchObject if this curve is not periodic. Standard_DomainError if Index is outside the bounds of the knots table.
Parameters:Index (int) –
Return type:None
  • Set the origin of a periodic curve at Knot U. If U is not a knot of the BSpline a new knot is inseted. KnotVector and poles are modified. Raised if the curve is not periodic
Parameters:
Return type:

None
SetPeriodic()
  • Changes this BSpline curve into a periodic curve. To become periodic, the curve must first be closed. Next, the knot sequence must be periodic. For this, FirstUKnotIndex and LastUKnotIndex are used to compute I1 and I2, the indexes in the knots array of the knots corresponding to the first and last parameters of this BSpline curve. The period is therefore: Knots(I2) - Knots(I1). Consequently, the knots and poles tables are modified. Exceptions Standard_ConstructionError if this BSpline curve is not closed.
Return type:None
SetPole()
  • Modifies this BSpline curve by assigning P to the pole of index Index in the poles table. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table. Standard_ConstructionError if Weight is negative or null.
Parameters:
Return type:

None
  • Modifies this BSpline curve by assigning P to the pole of index Index in the poles table. This syntax also allows you to modify the weight of the modified pole, which becomes Weight. In this case, if this BSpline curve is non-rational, it can become rational and vice versa. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table. Standard_ConstructionError if Weight is negative or null.
Parameters:
Return type:

None
SetWeight()
  • Changes the weight for the pole of range Index. If the curve was non rational it can become rational. If the curve was rational it can become non rational. //! Raised if Index < 1 || Index > NbPoles Raised if Weight <= 0.0
Parameters:
Return type:

None
Weight()
  • Returns the weight of the pole of range Index . Raised if Index < 1 or Index > NbPoles.
Parameters:Index (int) –
Return type:float
Weights()
  • Returns the weights of the B-spline curve; //! Raised if the length of W is not equal to NbPoles.
Parameters:W (TColStd_Array1OfReal &) –
Return type:None
  • Returns the weights of the B-spline curve;
Return type:TColStd_Array1OfReal
thisown

The membership flag

Geom_BSplineCurve_MaxDegree()
  • Returns the value of the maximum degree of the normalized B-spline basis functions in this package.
Return type:int
class Geom_BSplineSurface(*args)

Bases: OCC.Geom.Geom_BoundedSurface

  • Creates a non-rational b-spline surface (weights default value is 1.). The following conditions must be verified. 0 < UDegree <= MaxDegree. UKnots.Length() == UMults.Length() >= 2 UKnots(i) < UKnots(i+1) (Knots are increasing) 1 <= UMults(i) <= UDegree On a non uperiodic surface the first and last umultiplicities may be UDegree+1 (this is even recommanded if you want the curve to start and finish on the first and last pole). On a uperiodic surface the first and the last umultiplicities must be the same. on non-uperiodic surfaces Poles.ColLength() == Sum(UMults(i)) - UDegree - 1 >= 2 on uperiodic surfaces Poles.ColLength() == Sum(UMults(i)) except the first or last The previous conditions for U holds also for V, with the RowLength of the poles.
Parameters:
  • Poles (TColgp_Array2OfPnt) –
  • UKnots (TColStd_Array1OfReal &) –
  • VKnots (TColStd_Array1OfReal &) –
  • UMults (TColStd_Array1OfInteger &) –
  • VMults (TColStd_Array1OfInteger &) –
  • UDegree (int) –
  • VDegree (int) –
  • UPeriodic (bool) – default value is Standard_False
  • VPeriodic (bool) – default value is Standard_False
Return type:

None
  • Creates a non-rational b-spline surface (weights default value is 1.). //! The following conditions must be verified. 0 < UDegree <= MaxDegree. //! UKnots.Length() == UMults.Length() >= 2 //! UKnots(i) < UKnots(i+1) (Knots are increasing) 1 <= UMults(i) <= UDegree //! On a non uperiodic surface the first and last umultiplicities may be UDegree+1 (this is even recommanded if you want the curve to start and finish on the first and last pole). //! On a uperiodic surface the first and the last umultiplicities must be the same. //! on non-uperiodic surfaces //! Poles.ColLength() == Sum(UMults(i)) - UDegree - 1 >= 2 //! on uperiodic surfaces //! Poles.ColLength() == Sum(UMults(i)) except the first or last //! The previous conditions for U holds also for V, with the RowLength of the poles.
Parameters:
  • Poles (TColgp_Array2OfPnt) –
  • Weights (TColStd_Array2OfReal &) –
  • UKnots (TColStd_Array1OfReal &) –
  • VKnots (TColStd_Array1OfReal &) –
  • UMults (TColStd_Array1OfInteger &) –
  • VMults (TColStd_Array1OfInteger &) –
  • UDegree (int) –
  • VDegree (int) –
  • UPeriodic (bool) – default value is Standard_False
  • VPeriodic (bool) – default value is Standard_False
Return type:

None
CheckAndSegment()
  • Segments the surface between U1 and U2 in the U-Direction. between V1 and V2 in the V-Direction. //! same as Segment but do nothing if U1 and U2 (resp. V1 and V2) are equal to the bounds in U (resp. in V) of <self>. For example, if <self> is periodic in V, it will be always periodic in V after the segmentation if the bounds in V are unchanged //! Warnings : Even if <self> is not closed it can become closed after the segmentation for example if U1 or U2 are out of the bounds of the surface <self> or if the surface makes loop. raises if U2 < U1 or V2 < V1
Parameters:
Return type:

None
ExchangeUV()
  • Exchanges the u and v parametric directions on this BSpline surface. As a consequence: - the poles and weights tables are transposed, - the knots and multiplicities tables are exchanged, - degrees of continuity, and rational, periodic and uniform characteristics are exchanged, and - the orientation of the surface is inverted.
Return type:None
FirstUKnotIndex()
  • Computes the Index of the UKnots which gives the first parametric value of the surface in the U direction. The UIso curve corresponding to this value is a boundary curve of the surface.
Return type:int
FirstVKnotIndex()
  • Computes the Index of the VKnots which gives the first parametric value of the surface in the V direction. The VIso curve corresponding to this knot is a boundary curve of the surface.
Return type:int
GetHandle()
IncreaseDegree()
  • Increases the degrees of this BSpline surface to UDegree and VDegree in the u and v parametric directions respectively. As a result, the tables of poles, weights and multiplicities are modified. The tables of knots is not changed. Note: Nothing is done if the given degree is less than or equal to the current degree in the corresponding parametric direction. Exceptions Standard_ConstructionError if UDegree or VDegree is greater than Geom_BSplineSurface::MaxDegree().
Parameters:
  • UDegree (int) –
  • VDegree (int) –
Return type:

None
IncreaseUMultiplicity()
  • Increases the multiplicity of the knot of range UIndex in the UKnots sequence. M is the new multiplicity. M must be greater than the previous multiplicity and lower or equal to the degree of the surface in the U parametric direction. Raised if M is not in the range [1, UDegree] //! Raised if UIndex is not in the range [FirstUKnotIndex, LastUKnotIndex] given by the methods with the same name.
Parameters:
  • UIndex (int) –
  • M (int) –
Return type:

None
  • Increases until order M the multiplicity of the set of knots FromI1,…., ToI2 in the U direction. This method can be used to make a B_spline surface into a PiecewiseBezier B_spline surface. If <self> was uniform, it can become non uniform. //! Raised if FromI1 or ToI2 is out of the range [FirstUKnotIndex, LastUKnotIndex]. //! M should be greater than the previous multiplicity of the all the knots FromI1,…, ToI2 and lower or equal to the Degree of the surface in the U parametric direction.
Parameters:
  • FromI1 (int) –
  • ToI2 (int) –
  • M (int) –
Return type:

None
IncreaseVMultiplicity()
  • Increases the multiplicity of a knot in the V direction. M is the new multiplicity. //! M should be greater than the previous multiplicity and lower than the degree of the surface in the V parametric direction. //! Raised if VIndex is not in the range [FirstVKnotIndex, LastVKnotIndex] given by the methods with the same name.
Parameters:
  • VIndex (int) –
  • M (int) –
Return type:

None
  • Increases until order M the multiplicity of the set of knots FromI1,…., ToI2 in the V direction. This method can be used to make a BSplineSurface into a PiecewiseBezier B_spline surface. If <self> was uniform, it can become non-uniform. //! Raised if FromI1 or ToI2 is out of the range [FirstVKnotIndex, LastVKnotIndex] given by the methods with the same name. //! M should be greater than the previous multiplicity of the all the knots FromI1,…, ToI2 and lower or equal to the Degree of the surface in the V parametric direction.
Parameters:
  • FromI1 (int) –
  • ToI2 (int) –
  • M (int) –
Return type:

None
IncrementUMultiplicity()
  • Increments the multiplicity of the consecutives uknots FromI1..ToI2 by step. The multiplicity of each knot FromI1,…..,ToI2 must be lower or equal to the UDegree of the B_spline. //! Raised if FromI1 or ToI2 is not in the range [FirstUKnotIndex, LastUKnotIndex] //! Raised if one knot has a multiplicity greater than UDegree.
Parameters:
  • FromI1 (int) –
  • ToI2 (int) –
  • Step (int) –
Return type:

None
IncrementVMultiplicity()
  • Increments the multiplicity of the consecutives vknots FromI1..ToI2 by step. The multiplicity of each knot FromI1,…..,ToI2 must be lower or equal to the VDegree of the B_spline. //! Raised if FromI1 or ToI2 is not in the range [FirstVKnotIndex, LastVKnotIndex] //! Raised if one knot has a multiplicity greater than VDegree.
Parameters:
  • FromI1 (int) –
  • ToI2 (int) –
  • Step (int) –
Return type:

None
InsertUKnot()
  • Inserts a knot value in the sequence of UKnots. If U is a knot value this method increases the multiplicity of the knot if the previous multiplicity was lower than M else it does nothing. The tolerance criterion is ParametricTolerance. ParametricTolerance should be greater or equal than Resolution from package gp. //! Raised if U is out of the bounds [U1, U2] given by the methods Bounds, the criterion ParametricTolerance is used. Raised if M is not in the range [1, UDegree].
Parameters:
  • U (float) –
  • M (int) –
  • ParametricTolerance (float) –
  • Add (bool) – default value is Standard_True
Return type:

None
InsertUKnots()
Parameters:
  • Knots (TColStd_Array1OfReal &) –
  • Mults (TColStd_Array1OfInteger &) –
  • ParametricTolerance (float) – default value is 0.0
  • Add (bool) – default value is Standard_True
Return type:

None
InsertVKnot()
  • Inserts a knot value in the sequence of VKnots. If V is a knot value this method increases the multiplicity of the knot if the previous multiplicity was lower than M otherwise it does nothing. The tolerance criterion is ParametricTolerance. ParametricTolerance should be greater or equal than Resolution from package gp. //! raises if V is out of the Bounds [V1, V2] given by the methods Bounds, the criterion ParametricTolerance is used. raises if M is not in the range [1, VDegree].
Parameters:
  • V (float) –
  • M (int) –
  • ParametricTolerance (float) –
  • Add (bool) – default value is Standard_True
Return type:

None
InsertVKnots()
  • Inserts into the knots table for the corresponding parametric direction of this BSpline surface: - the value U, or V, with the multiplicity M (defaulted to 1), or - the values of the array Knots, with their respective multiplicities, Mults. If the knot value to insert already exists in the table, its multiplicity is: - increased by M, if Add is true (the default), or - increased to M, if Add is false. The tolerance criterion used to check the equality of the knots is the larger of the values ParametricTolerance and Standard_Real::Epsilon(val), where val is the knot value to be inserted. Warning - If a given multiplicity coefficient is null, or negative, nothing is done. - The new multiplicity of a knot is limited to the degree of this BSpline surface in the corresponding parametric direction. Exceptions Standard_ConstructionError if a knot value to insert is outside the bounds of this BSpline surface in the specified parametric direction. The comparison uses the precision criterion ParametricTolerance.
Parameters:
  • Knots (TColStd_Array1OfReal &) –
  • Mults (TColStd_Array1OfInteger &) –
  • ParametricTolerance (float) – default value is 0.0
  • Add (bool) – default value is Standard_True
Return type:

None
IsCacheValid()
  • Tells whether the Cache is valid for the given parameter Warnings : the parameter must be normalized within the period if the curve is periodic. Otherwise the answer will be false
Parameters:
Return type:

bool
IsURational()
Return type:bool
IsVRational()
Return type:bool
LastUKnotIndex()
  • Computes the Index of the UKnots which gives the last parametric value of the surface in the U direction. The UIso curve corresponding to this knot is a boundary curve of the surface.
Return type:int
LastVKnotIndex()
  • Computes the Index of the VKnots which gives the last parametric value of the surface in the V direction. The VIso curve corresponding to this knot is a boundary curve of the surface.
Return type:int
LocalD0()
  • Raised if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raised if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

None
LocalD1()
  • Raised if the local continuity of the surface is not C1 between the knots FromUK1, ToUK2 and FromVK1, ToVK2. Raised if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raised if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

None
LocalD2()
  • Raised if the local continuity of the surface is not C2 between the knots FromUK1, ToUK2 and FromVK1, ToVK2. Raised if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raised if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

None
LocalD3()
  • Raised if the local continuity of the surface is not C3 between the knots FromUK1, ToUK2 and FromVK1, ToVK2. Raised if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raised if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

None
LocalDN()
  • Raised if the local continuity of the surface is not CNu between the knots FromUK1, ToUK2 and CNv between the knots FromVK1, ToVK2. Raised if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raised if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

gp_Vec
LocalValue()
  • Computes the point of parameter U, V on the BSpline surface patch defines between the knots UK1 UK2, VK1, VK2. U can be out of the bounds [Knot UK1, Knot UK2] and V can be outof the bounds [Knot VK1, Knot VK2] but for the computation we only use the definition of the surface between these knot values. Raises if FromUK1 = ToUK2 or FromVK1 = ToVK2. //! Raises if FromUK1, ToUK2 are not in the range [FirstUKnotIndex, LastUKnotIndex] or if FromVK1, ToVK2 are not in the range [FirstVKnotIndex, LastVKnotIndex]
Parameters:
Return type:

gp_Pnt
LocateU()
  • Locates the parametric value U in the sequence of UKnots. If ‘WithKnotRepetition’ is True we consider the knot’s representation with repetition of multiple knot value, otherwise we consider the knot’s representation with no repetition of multiple knot values. UKnots (I1) <= U <= UKnots (I2) . if I1 = I2 U is a knot value (the tolerance criterion ParametricTolerance is used). . if I1 < 1 => U < UKnots(1) - Abs(ParametricTolerance) . if I2 > NbUKnots => U > UKnots(NbUKnots)+Abs(ParametricTolerance)
Parameters:
  • U (float) –
  • ParametricTolerance (float) –
  • I1 (int &) –
  • I2 (int &) –
  • WithKnotRepetition (bool) – default value is Standard_False
Return type:

None
LocateV()
  • Locates the parametric value U in the sequence of knots. If ‘WithKnotRepetition’ is True we consider the knot’s representation with repetition of multiple knot value, otherwise we consider the knot’s representation with no repetition of multiple knot values. VKnots (I1) <= V <= VKnots (I2) . if I1 = I2 V is a knot value (the tolerance criterion ParametricTolerance is used). . if I1 < 1 => V < VKnots(1) - Abs(ParametricTolerance) . if I2 > NbVKnots => V > VKnots(NbVKnots)+Abs(ParametricTolerance) poles insertion and removing The following methods are available only if the surface is Uniform or QuasiUniform in the considered direction The knot repartition is modified.
Parameters:
  • V (float) –
  • ParametricTolerance (float) –
  • I1 (int &) –
  • I2 (int &) –
  • WithKnotRepetition (bool) – default value is Standard_False
Return type:

None
static MaxDegree()
  • Returns the value of the maximum degree of the normalized B-spline basis functions in the u and v directions.
Return type:int
MovePoint()
  • Move a point with parameter U and V to P. given u,v as parameters) to reach a new position UIndex1, UIndex2, VIndex1, VIndex2: indicates the poles which can be moved if Problem in BSplineBasis calculation, no change for the curve and UFirstIndex, VLastIndex = 0 VFirstIndex, VLastIndex = 0 //! Raised if UIndex1 < UIndex2 or VIndex1 < VIndex2 or UIndex1 < 1 || UIndex1 > NbUPoles or UIndex2 < 1 || UIndex2 > NbUPoles VIndex1 < 1 || VIndex1 > NbVPoles or VIndex2 < 1 || VIndex2 > NbVPoles characteristics of the surface
Parameters:
  • U (float) –
  • V (float) –
  • P (gp_Pnt) –
  • UIndex1 (int) –
  • UIndex2 (int) –
  • VIndex1 (int) –
  • VIndex2 (int) –
  • UFirstIndex (int &) –
  • ULastIndex (int &) –
  • VFirstIndex (int &) –
  • VLastIndex (int &) –
Return type:

None
NbUKnots()
  • Returns the number of knots in the U direction.
Return type:int
NbUPoles()
  • Returns number of poles in the U direction.
Return type:int
NbVKnots()
  • Returns the number of knots in the V direction.
Return type:int
NbVPoles()
  • Returns the number of poles in the V direction.
Return type:int
PeriodicNormalization()
  • returns the parameter normalized within the period if the surface is periodic : otherwise does not do anything
Parameters:
  • U (float &) –
  • V (float &) –
Return type:

None
Pole()
  • Returns the pole of range (UIndex, VIndex). //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles.
Parameters:
  • UIndex (int) –
  • VIndex (int) –
Return type:

gp_Pnt
Poles()
  • Returns the poles of the B-spline surface. //! Raised if the length of P in the U and V direction is not equal to NbUpoles and NbVPoles.
Parameters:P (TColgp_Array2OfPnt) –
Return type:None
  • Returns the poles of the B-spline surface.
Return type:TColgp_Array2OfPnt
RemoveUKnot()
Parameters:
Return type:

bool
RemoveVKnot()
  • Reduces to M the multiplicity of the knot of index Index in the given parametric direction. If M is 0, the knot is removed. With a modification of this type, the table of poles is also modified. Two different algorithms are used systematically to compute the new poles of the surface. For each pole, the distance between the pole calculated using the first algorithm and the same pole calculated using the second algorithm, is checked. If this distance is less than Tolerance it ensures that the surface is not modified by more than Tolerance. Under these conditions, the function returns true; otherwise, it returns false. A low tolerance prevents modification of the surface. A high tolerance ‘smoothes’ the surface. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of this BSpline surface.
Parameters:
Return type:

bool
Resolution()
  • Computes two tolerance values for this BSpline surface, based on the given tolerance in 3D space Tolerance3D. The tolerances computed are: - UTolerance in the u parametric direction, and - VTolerance in the v parametric direction. If f(u,v) is the equation of this BSpline surface, UTolerance and VTolerance guarantee that : | u1 - u0 | < UTolerance and | v1 - v0 | < VTolerance ====> |f (u1,v1) - f (u0,v0)| < Tolerance3D
Parameters:
  • Tolerance3D (float) –
  • UTolerance (float &) –
  • VTolerance (float &) –
Return type:

None
Segment()
  • Segments the surface between U1 and U2 in the U-Direction. between V1 and V2 in the V-Direction. The control points are modified, the first and the last point are not the same. Warnings : Even if <self> is not closed it can become closed after the segmentation for example if U1 or U2 are out of the bounds of the surface <self> or if the surface makes loop. raises if U2 < U1 or V2 < V1
Parameters:
Return type:

None
SetPole()
  • Substitutes the pole of range (UIndex, VIndex) with P. If the surface is rational the weight of range (UIndex, VIndex) is not modified. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles.
Parameters:
Return type:

None
  • Substitutes the pole and the weight of range (UIndex, VIndex) with P and W. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles. Raised if Weight <= Resolution from package gp.
Parameters:
Return type:

None
SetPoleCol()
  • Changes a column of poles or a part of this column. Raised if Vindex < 1 or VIndex > NbVPoles. //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbUPoles.
Parameters:
Return type:

None
  • Changes a column of poles or a part of this column with the corresponding weights. If the surface was rational it can become non rational. If the surface was non rational it can become rational. Raised if Vindex < 1 or VIndex > NbVPoles. //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbUPoles Raised if the bounds of CPoleWeights are not the same as the bounds of CPoles. Raised if one of the weight value of CPoleWeights is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
SetPoleRow()
  • Changes a row of poles or a part of this row with the corresponding weights. If the surface was rational it can become non rational. If the surface was non rational it can become rational. Raised if Uindex < 1 or UIndex > NbUPoles. //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbVPoles raises if the bounds of CPoleWeights are not the same as the bounds of CPoles. Raised if one of the weight value of CPoleWeights is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
  • Changes a row of poles or a part of this row. Raised if Uindex < 1 or UIndex > NbUPoles. //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbVPoles.
Parameters:
Return type:

None
SetUKnot()
  • Substitutes the UKnots of range UIndex with K. //! Raised if UIndex < 1 or UIndex > NbUKnots //! Raised if K >= UKnots(UIndex+1) or K <= UKnots(UIndex-1)
Parameters:
Return type:

None
  • Changes the value of the UKnots of range UIndex and increases its multiplicity. //! Raised if UIndex is not in the range [FirstUKnotIndex, LastUKnotIndex] given by the methods with the same name. //! Raised if K >= UKnots(UIndex+1) or K <= UKnots(UIndex-1) M must be lower than UDegree and greater than the previous multiplicity of the knot of range UIndex.
Parameters:
Return type:

None
SetUKnots()
  • Changes all the U-knots of the surface. The multiplicity of the knots are not modified. //! Raised if there is an index such that UK (Index+1) <= UK (Index). //! Raised if UK.Lower() < 1 or UK.Upper() > NbUKnots
Parameters:UK (TColStd_Array1OfReal &) –
Return type:None
SetUNotPeriodic()
Return type:None
SetUOrigin()
  • Assigns the knot of index Index in the knots table in the corresponding parametric direction to be the origin of this periodic BSpline surface. As a consequence, the knots and poles tables are modified. Exceptions Standard_NoSuchObject if this BSpline surface is not periodic in the given parametric direction. Standard_DomainError if Index is outside the bounds of the knots table in the given parametric direction.
Parameters:Index (int) –
Return type:None
SetUPeriodic()
  • Sets the surface U periodic.
Return type:None
SetVKnot()
  • Substitutes the VKnots of range VIndex with K. //! Raised if VIndex < 1 or VIndex > NbVKnots //! Raised if K >= VKnots(VIndex+1) or K <= VKnots(VIndex-1)
Parameters:
Return type:

None
  • Changes the value of the VKnots of range VIndex and increases its multiplicity. //! Raised if VIndex is not in the range [FirstVKnotIndex, LastVKnotIndex] given by the methods with the same name. //! Raised if K >= VKnots(VIndex+1) or K <= VKnots(VIndex-1) M must be lower than VDegree and greater than the previous multiplicity of the knot of range VIndex.
Parameters:
Return type:

None
SetVKnots()
  • Changes all the V-knots of the surface. The multiplicity of the knots are not modified. //! Raised if there is an index such that VK (Index+1) <= VK (Index). //! Raised if VK.Lower() < 1 or VK.Upper() > NbVKnots
Parameters:VK (TColStd_Array1OfReal &) –
Return type:None
SetVNotPeriodic()
  • Modifies this surface to be periodic in the u (or v) parametric direction. To become periodic in a given parametric direction a surface must be closed in that parametric direction, and the knot sequence relative to that direction must be periodic. To generate this periodic sequence of knots, the functions FirstUKnotIndex and LastUKnotIndex (or FirstVKnotIndex and LastVKnotIndex) are used to compute I1 and I2. These are the indexes, in the knot array associated with the given parametric direction, of the knots that correspond to the first and last parameters of this BSpline surface in the given parametric direction. Hence the period is: Knots(I1) - Knots(I2) As a result, the knots and poles tables are modified. Exceptions Standard_ConstructionError if the surface is not closed in the given parametric direction.
Return type:None
SetVOrigin()
  • Assigns the knot of index Index in the knots table in the corresponding parametric direction to be the origin of this periodic BSpline surface. As a consequence, the knots and poles tables are modified. Exceptions Standard_NoSuchObject if this BSpline surface is not periodic in the given parametric direction. Standard_DomainError if Index is outside the bounds of the knots table in the given parametric direction.
Parameters:Index (int) –
Return type:None
SetVPeriodic()
  • Modifies this surface to be periodic in the u (or v) parametric direction. To become periodic in a given parametric direction a surface must be closed in that parametric direction, and the knot sequence relative to that direction must be periodic. To generate this periodic sequence of knots, the functions FirstUKnotIndex and LastUKnotIndex (or FirstVKnotIndex and LastVKnotIndex) are used to compute I1 and I2. These are the indexes, in the knot array associated with the given parametric direction, of the knots that correspond to the first and last parameters of this BSpline surface in the given parametric direction. Hence the period is: Knots(I1) - Knots(I2) As a result, the knots and poles tables are modified. Exceptions Standard_ConstructionError if the surface is not closed in the given parametric direction.
Return type:None
SetWeight()
  • Changes the weight of the pole of range UIndex, VIndex. If the surface was non rational it can become rational. If the surface was rational it can become non rational. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles //! Raised if weight is lower or equal to Resolution from package gp
Parameters:
Return type:

None
SetWeightCol()
  • Changes a column of weights of a part of this column. //! Raised if VIndex < 1 or VIndex > NbVPoles //! Raised if CPoleWeights.Lower() < 1 or CPoleWeights.Upper() > NbUPoles. Raised if a weight value is lower or equal to Resolution from package gp.
Parameters:
  • VIndex (int) –
  • CPoleWeights (TColStd_Array1OfReal &) –
Return type:

None
SetWeightRow()
  • Changes a row of weights or a part of this row. //! Raised if UIndex < 1 or UIndex > NbUPoles //! Raised if CPoleWeights.Lower() < 1 or CPoleWeights.Upper() > NbVPoles. Raised if a weight value is lower or equal to Resolution from package gp.
Parameters:
  • UIndex (int) –
  • CPoleWeights (TColStd_Array1OfReal &) –
Return type:

None
UDegree()
  • Returns the degree of the normalized B-splines Ni,n in the U direction.
Return type:int
UIso()
  • Computes the U isoparametric curve. A B-spline curve is returned.
Parameters:U (float) –
Return type:Handle_Geom_Curve
  • Computes the U isoparametric curve. If CheckRational=False, no try to make it non-rational. A B-spline curve is returned.
Parameters:
Return type:

Handle_Geom_Curve
UKnot()
  • Returns the Knot value of range UIndex. Raised if UIndex < 1 or UIndex > NbUKnots
Parameters:UIndex (int) –
Return type:float
UKnotDistribution()
  • Returns NonUniform or Uniform or QuasiUniform or PiecewiseBezier. If all the knots differ by a positive constant from the preceding knot in the U direction the B-spline surface can be : - Uniform if all the knots are of multiplicity 1, - QuasiUniform if all the knots are of multiplicity 1 except for the first and last knot which are of multiplicity Degree + 1, - PiecewiseBezier if the first and last knots have multiplicity Degree + 1 and if interior knots have multiplicity Degree otherwise the surface is non uniform in the U direction The tolerance criterion is Resolution from package gp.
Return type:GeomAbs_BSplKnotDistribution
UKnotSequence()
  • Returns the uknots sequence. In this sequence the knots with a multiplicity greater than 1 are repeated. Example : Ku = {k1, k1, k1, k2, k3, k3, k4, k4, k4} //! Raised if the length of Ku is not equal to NbUPoles + UDegree + 1
Parameters:Ku (TColStd_Array1OfReal &) –
Return type:None
  • Returns the uknots sequence. In this sequence the knots with a multiplicity greater than 1 are repeated. Example : Ku = {k1, k1, k1, k2, k3, k3, k4, k4, k4}
Return type:TColStd_Array1OfReal
UKnots()
  • Returns the knots in the U direction. //! Raised if the length of Ku is not equal to the number of knots in the U direction.
Parameters:Ku (TColStd_Array1OfReal &) –
Return type:None
  • Returns the knots in the U direction.
Return type:TColStd_Array1OfReal
UMultiplicities()
  • Returns the multiplicities of the knots in the U direction. //! Raised if the length of Mu is not equal to the number of knots in the U direction.
Parameters:Mu (TColStd_Array1OfInteger &) –
Return type:None
  • Returns the multiplicities of the knots in the U direction.
Return type:TColStd_Array1OfInteger
UMultiplicity()
  • Returns the multiplicity value of knot of range UIndex in the u direction. Raised if UIndex < 1 or UIndex > NbUKnots.
Parameters:UIndex (int) –
Return type:int
VDegree()
  • Returns the degree of the normalized B-splines Ni,d in the V direction.
Return type:int
VIso()
  • Computes the V isoparametric curve. A B-spline curve is returned.
Parameters:V (float) –
Return type:Handle_Geom_Curve
  • Computes the V isoparametric curve. If CheckRational=False, no try to make it non-rational. A B-spline curve is returned. transformations
Parameters:
Return type:

Handle_Geom_Curve
VKnot()
  • Returns the Knot value of range VIndex.
Parameters:VIndex (int) –
Return type:float
VKnotDistribution()
  • Returns NonUniform or Uniform or QuasiUniform or PiecewiseBezier. If all the knots differ by a positive constant from the preceding knot in the V direction the B-spline surface can be : - Uniform if all the knots are of multiplicity 1, - QuasiUniform if all the knots are of multiplicity 1 except for the first and last knot which are of multiplicity Degree + 1, - PiecewiseBezier if the first and last knots have multiplicity Degree + 1 and if interior knots have multiplicity Degree otherwise the surface is non uniform in the V direction. The tolerance criterion is Resolution from package gp.
Return type:GeomAbs_BSplKnotDistribution
VKnotSequence()
  • Returns the vknots sequence. In this sequence the knots with a multiplicity greater than 1 are repeated. Example : Kv = {k1, k1, k1, k2, k3, k3, k4, k4, k4} //! Raised if the length of Kv is not equal to NbVPoles + VDegree + 1
Parameters:Kv (TColStd_Array1OfReal &) –
Return type:None
  • Returns the vknots sequence. In this sequence the knots with a multiplicity greater than 1 are repeated. Example : Ku = {k1, k1, k1, k2, k3, k3, k4, k4, k4}
Return type:TColStd_Array1OfReal
VKnots()
  • Returns the knots in the V direction. //! Raised if the length of Kv is not equal to the number of knots in the V direction.
Parameters:Kv (TColStd_Array1OfReal &) –
Return type:None
  • Returns the knots in the V direction.
Return type:TColStd_Array1OfReal
VMultiplicities()
  • Returns the multiplicities of the knots in the V direction. //! Raised if the length of Mv is not equal to the number of knots in the V direction.
Parameters:Mv (TColStd_Array1OfInteger &) –
Return type:None
  • Returns the multiplicities of the knots in the V direction.
Return type:TColStd_Array1OfInteger
VMultiplicity()
  • Returns the multiplicity value of knot of range VIndex in the v direction. Raised if VIndex < 1 or VIndex > NbVKnots
Parameters:VIndex (int) –
Return type:int
Weight()
  • Returns the weight value of range UIndex, VIndex. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles.
Parameters:
  • UIndex (int) –
  • VIndex (int) –
Return type:

float
Weights()
  • Returns the weights of the B-spline surface. //! Raised if the length of W in the U and V direction is not equal to NbUPoles and NbVPoles.
Parameters:W (TColStd_Array2OfReal &) –
Return type:None
  • Returns the weights of the B-spline surface. value and derivatives computation
Return type:TColStd_Array2OfReal
thisown

The membership flag

Geom_BSplineSurface_MaxDegree()
  • Returns the value of the maximum degree of the normalized B-spline basis functions in the u and v directions.
Return type:int
class Geom_BezierCurve(*args)

Bases: OCC.Geom.Geom_BoundedCurve

  • Creates a non rational Bezier curve with a set of poles CurvePoles. The weights are defaulted to all being 1. Raises ConstructionError if the number of poles is greater than MaxDegree + 1 or lower than 2.
Parameters:CurvePoles (TColgp_Array1OfPnt) –
Return type:None
  • Creates a rational Bezier curve with the set of poles CurvePoles and the set of weights PoleWeights . If all the weights are identical the curve is considered as non rational. Raises ConstructionError if the number of poles is greater than MaxDegree + 1 or lower than 2 or CurvePoles and CurveWeights have not the same length or one weight value is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
Degree()
  • Returns the polynomial degree of the curve. it is the number of poles - 1 point P and derivatives (V1, V2, V3) computation The Bezier Curve has a Polynomial representation so the parameter U can be out of the bounds of the curve.
Return type:int
GetHandle()
Increase()
  • Increases the degree of a bezier curve. Degree is the new degree of <self>. Raises ConstructionError if Degree is greater than MaxDegree or lower than 2 or lower than the initial degree of <self>.
Parameters:Degree (int) –
Return type:None
InsertPoleAfter()
  • Inserts a pole P after the pole of range Index. If the curve <self> is rational the weight value for the new pole of range Index is 1.0. raised if Index is not in the range [1, NbPoles] //! raised if the resulting number of poles is greater than MaxDegree + 1.
Parameters:
Return type:

None
  • Inserts a pole with its weight in the set of poles after the pole of range Index. If the curve was non rational it can become rational if all the weights are not identical. Raised if Index is not in the range [1, NbPoles] //! Raised if the resulting number of poles is greater than MaxDegree + 1. Raised if Weight is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
InsertPoleBefore()
  • Inserts a pole P before the pole of range Index. If the curve <self> is rational the weight value for the new pole of range Index is 1.0. Raised if Index is not in the range [1, NbPoles] //! Raised if the resulting number of poles is greater than MaxDegree + 1.
Parameters:
Return type:

None
  • Inserts a pole with its weight in the set of poles after the pole of range Index. If the curve was non rational it can become rational if all the weights are not identical. Raised if Index is not in the range [1, NbPoles] //! Raised if the resulting number of poles is greater than MaxDegree + 1. Raised if Weight is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
IsRational()
  • Returns false if all the weights are identical. The tolerance criterion is Resolution from package gp.
Return type:bool
static MaxDegree()
  • Returns the value of the maximum polynomial degree of any Geom_BezierCurve curve. This value is 25.
Return type:int
NbPoles()
  • Returns the number of poles of this Bezier curve.
Return type:int
Pole()
  • Returns the pole of range Index. Raised if Index is not in the range [1, NbPoles]
Parameters:Index (int) –
Return type:gp_Pnt
Poles()
  • Returns all the poles of the curve. //! Raised if the length of P is not equal to the number of poles.
Parameters:P (TColgp_Array1OfPnt) –
Return type:None
RemovePole()
  • Removes the pole of range Index. If the curve was rational it can become non rational. Raised if Index is not in the range [1, NbPoles] Raised if Degree is lower than 2.
Parameters:Index (int) –
Return type:None
Resolution()
  • Computes for this Bezier curve the parametric tolerance UTolerance for a given 3D tolerance Tolerance3D. If f(t) is the equation of this Bezier curve, UTolerance ensures that: |t1-t0| < UTolerance ===> |f(t1)-f(t0)| < Tolerance3D
Parameters:
  • Tolerance3D (float) –
  • UTolerance (float &) –
Return type:

None
Segment()
  • Segments the curve between U1 and U2 which can be out of the bounds of the curve. The curve is oriented from U1 to U2. The control points are modified, the first and the last point are not the same but the parametrization range is [0, 1] else it could not be a Bezier curve. Warnings : Even if <self> is not closed it can become closed after the segmentation for example if U1 or U2 are out of the bounds of the curve <self> or if the curve makes loop. After the segmentation the length of a curve can be null.
Parameters:
Return type:

None
SetPole()
  • Substitutes the pole of range index with P. If the curve <self> is rational the weight of range Index is not modified. raiseD if Index is not in the range [1, NbPoles]
Parameters:
Return type:

None
  • Substitutes the pole and the weights of range Index. If the curve <self> is not rational it can become rational if all the weights are not identical. If the curve was rational it can become non rational if all the weights are identical. Raised if Index is not in the range [1, NbPoles] Raised if Weight <= Resolution from package gp
Parameters:
Return type:

None
SetWeight()
  • Changes the weight of the pole of range Index. If the curve <self> is not rational it can become rational if all the weights are not identical. If the curve was rational it can become non rational if all the weights are identical. Raised if Index is not in the range [1, NbPoles] Raised if Weight <= Resolution from package gp
Parameters:
Return type:

None
Weight()
  • Returns the weight of range Index. Raised if Index is not in the range [1, NbPoles]
Parameters:Index (int) –
Return type:float
Weights()
  • Returns all the weights of the curve. //! Raised if the length of W is not equal to the number of poles.
Parameters:W (TColStd_Array1OfReal &) –
Return type:None
thisown

The membership flag

Geom_BezierCurve_MaxDegree()
  • Returns the value of the maximum polynomial degree of any Geom_BezierCurve curve. This value is 25.
Return type:int
class Geom_BezierSurface(*args)

Bases: OCC.Geom.Geom_BoundedSurface

  • Creates a non-rational Bezier surface with a set of poles. Control points representation : SPoles(Uorigin,Vorigin) ……………….SPoles(Uorigin,Vend) . . . . SPoles(Uend, Vorigin) …………………SPoles(Uend, Vend) For the double array the row indice corresponds to the parametric U direction and the columns indice corresponds to the parametric V direction. The weights are defaulted to all being 1. //! Raised if the number of poles of the surface is lower than 2 or greater than MaxDegree + 1 in one of the two directions U or V.
Parameters:SurfacePoles (TColgp_Array2OfPnt) –
Return type:None
  • —Purpose Creates a rational Bezier surface with a set of poles and a set of weights. For the double array the row indice corresponds to the parametric U direction and the columns indice corresponds to the parametric V direction. If all the weights are identical the surface is considered as non-rational (the tolerance criterion is Resolution from package gp). //! Raised if SurfacePoles and PoleWeights have not the same Rowlength or have not the same ColLength. Raised if PoleWeights (i, j) <= Resolution from gp; Raised if the number of poles of the surface is lower than 2 or greater than MaxDegree + 1 in one of the two directions U or V.
Parameters:
Return type:

None
ExchangeUV()
  • Exchanges the direction U and V on a Bezier surface As a consequence: - the poles and weights tables are transposed, - degrees, rational characteristics and so on are exchanged between the two parametric directions, and - the orientation of the surface is reversed.
Return type:None
GetHandle()
Increase()
  • Increases the degree of this Bezier surface in the two parametric directions. //! Raised if UDegree < UDegree <self> or VDegree < VDegree <self> Raised if the degree of the surface is greater than MaxDegree in one of the two directions U or V.
Parameters:
  • UDeg (int) –
  • VDeg (int) –
Return type:

None
InsertPoleColAfter()
  • Inserts a column of poles. If the surface is rational the weights values associated with CPoles are equal defaulted to 1. //! Raised if Vindex < 1 or VIndex > NbVPoles. //! raises if VDegree is greater than MaxDegree. raises if the Length of CPoles is not equal to NbUPoles
Parameters:
Return type:

None
  • Inserts a column of poles and weights. If the surface was non-rational it can become rational. //! Raised if Vindex < 1 or VIndex > NbVPoles. Raised if . VDegree is greater than MaxDegree. . the Length of CPoles is not equal to NbUPoles . a weight value is lower or equal to Resolution from package gp
Parameters:
Return type:

None
InsertPoleColBefore()
  • Inserts a column of poles. If the surface is rational the weights values associated with CPoles are equal defaulted to 1. //! Raised if Vindex < 1 or VIndex > NbVPoles. //! Raised if VDegree is greater than MaxDegree. Raised if the Length of CPoles is not equal to NbUPoles
Parameters:
Return type:

None
  • Inserts a column of poles and weights. If the surface was non-rational it can become rational. //! Raised if Vindex < 1 or VIndex > NbVPoles. Raised if : . VDegree is greater than MaxDegree. . the Length of CPoles is not equal to NbUPoles . a weight value is lower or equal to Resolution from package gp
Parameters:
Return type:

None
InsertPoleRowAfter()
  • Inserts a row of poles. If the surface is rational the weights values associated with CPoles are equal defaulted to 1. //! Raised if Uindex < 1 or UIndex > NbUPoles. //! Raised if UDegree is greater than MaxDegree. Raised if the Length of CPoles is not equal to NbVPoles
Parameters:
Return type:

None
  • Inserts a row of poles and weights. If the surface was non-rational it can become rational. //! Raised if Uindex < 1 or UIndex > NbUPoles. Raised if : . UDegree is greater than MaxDegree. . the Length of CPoles is not equal to NbVPoles . a weight value is lower or equal to Resolution from package gp
Parameters:
Return type:

None
InsertPoleRowBefore()
  • Inserts a row of poles. If the surface is rational the weights values associated with CPoles are equal defaulted to 1. //! Raised if Uindex < 1 or UIndex > NbUPoles. //! Raised if UDegree is greater than MaxDegree. Raised if the Length of CPoles is not equal to NbVPoles
Parameters:
Return type:

None
  • Inserts a row of poles and weights. If the surface was non-rational it can become rational. //! Raised if Uindex < 1 or UIndex > NbUPoles. Raised if : . UDegree is greater than MaxDegree. . the Length of CPoles is not equal to NbVPoles . a weight value is lower or equal to Resolution from pacakage gp
Parameters:
Return type:

None
IsURational()
Return type:bool
IsVRational()
Return type:bool
static MaxDegree()
  • Returns the value of the maximum polynomial degree of a Bezier surface. This value is 25.
Return type:int
NbUPoles()
  • Returns the number of poles in the U direction.
Return type:int
NbVPoles()
  • Returns the number of poles in the V direction.
Return type:int
Pole()
  • Returns the pole of range UIndex, VIndex Raised if UIndex < 1 or UIndex > NbUPoles, or VIndex < 1 or VIndex > NbVPoles.
Parameters:
  • UIndex (int) –
  • VIndex (int) –
Return type:

gp_Pnt
Poles()
  • Returns the poles of the Bezier surface. //! Raised if the length of P in the U an V direction is not equal to NbUPoles and NbVPoles.
Parameters:P (TColgp_Array2OfPnt) –
Return type:None
RemovePoleCol()
  • Removes a column of poles. If the surface was rational it can become non-rational. //! Raised if NbVPoles <= 2 after removing, a Bezier surface must have at least two columns of poles. Raised if Vindex < 1 or VIndex > NbVPoles
Parameters:VIndex (int) –
Return type:None
RemovePoleRow()
  • Removes a row of poles. If the surface was rational it can become non-rational. //! Raised if NbUPoles <= 2 after removing, a Bezier surface must have at least two rows of poles. Raised if Uindex < 1 or UIndex > NbUPoles
Parameters:UIndex (int) –
Return type:None
Resolution()
  • Computes two tolerance values for this Bezier surface, based on the given tolerance in 3D space Tolerance3D. The tolerances computed are: - UTolerance in the u parametric direction, and - VTolerance in the v parametric direction. If f(u,v) is the equation of this Bezier surface, UTolerance and VTolerance guarantee that: | u1 - u0 | < UTolerance and | v1 - v0 | < VTolerance ====> |f (u1,v1) - f (u0,v0)| < Tolerance3D
Parameters:
  • Tolerance3D (float) –
  • UTolerance (float &) –
  • VTolerance (float &) –
Return type:

None
Segment()
  • Modifies this Bezier surface by segmenting it between U1 and U2 in the u parametric direction, and between V1 and V2 in the v parametric direction. U1, U2, V1, and V2 can be outside the bounds of this surface. - U1 and U2 isoparametric Bezier curves, segmented between V1 and V2, become the two bounds of the surface in the v parametric direction (0. and 1. u isoparametric curves). - V1 and V2 isoparametric Bezier curves, segmented between U1 and U2, become the two bounds of the surface in the u parametric direction (0. and 1. v isoparametric curves). The poles and weights tables are modified, but the degree of this surface in the u and v parametric directions does not change. U1 can be greater than U2, and V1 can be greater than V2. In these cases, the corresponding parametric direction is inverted. The orientation of the surface is inverted if one (and only one) parametric direction is inverted.
Parameters:
Return type:

None
SetPole()
  • Modifies a pole value. If the surface is rational the weight of range (UIndex, VIndex) is not modified. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles.
Parameters:
Return type:

None
  • Substitutes the pole and the weight of range UIndex, VIndex. If the surface <self> is not rational it can become rational. if the surface was rational it can become non-rational. //! raises if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles. Raised if Weight <= Resolution from package gp.
Parameters:
Return type:

None
SetPoleCol()
  • Modifies a column of poles. The length of CPoles can be lower but not greater than NbUPoles so you can modify just a part of the column. Raised if VIndex < 1 or VIndex > NbVPoles //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbUPoles
Parameters:
Return type:

None
  • Modifies a column of poles. If the surface was rational it can become non-rational If the surface was non-rational it can become rational. The length of CPoles can be lower but not greater than NbUPoles so you can modify just a part of the column. Raised if VIndex < 1 or VIndex > NbVPoles //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbUPoles Raised if CPoleWeights and CPoles have not the same bounds. Raised if one of the weight value CPoleWeights (i) is lower or equal to Resolution from package gp.
Parameters:
Return type:

None
SetPoleRow()
  • Modifies a row of poles. The length of CPoles can be lower but not greater than NbVPoles so you can modify just a part of the row. Raised if UIndex < 1 or UIndex > NbUPoles //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbVPoles
Parameters:
Return type:

None
  • Modifies a row of poles and weights. If the surface was rational it can become non-rational. If the surface was non-rational it can become rational. The length of CPoles can be lower but not greater than NbVPoles so you can modify just a part of the row. Raised if UIndex < 1 or UIndex > NbUPoles //! Raised if CPoles.Lower() < 1 or CPoles.Upper() > NbVPoles Raised if CPoleWeights and CPoles have not the same bounds. Raised if one of the weight value CPoleWeights (i) is lower or equal to Resolution from gp.
Parameters:
Return type:

None
SetWeight()
  • Modifies the weight of the pole of range UIndex, VIndex. If the surface was non-rational it can become rational. If the surface was rational it can become non-rational. //! Raised if UIndex < 1 or UIndex > NbUPoles or VIndex < 1 or VIndex > NbVPoles. Raised if Weight <= Resolution from package gp.
Parameters:
Return type:

None
SetWeightCol()
  • Modifies a column of weights. If the surface was rational it can become non-rational. If the surface was non-rational it can become rational. The length of CPoleWeights can be lower but not greater than NbUPoles. Raised if VIndex < 1 or VIndex > NbVPoles //! Raised if CPoleWeights.Lower() < 1 or CPoleWeights.Upper() > NbUPoles Raised if one of the weight value CPoleWeights (i) is lower or equal to Resolution from package gp.
Parameters:
  • VIndex (int) –
  • CPoleWeights (TColStd_Array1OfReal &) –
Return type:

None
SetWeightRow()
  • Modifies a row of weights. If the surface was rational it can become non-rational. If the surface was non-rational it can become rational. The length of CPoleWeights can be lower but not greater than NbVPoles. Raised if UIndex < 1 or UIndex > NbUPoles //! Raised if CPoleWeights.Lower() < 1 or CPoleWeights.Upper() > NbVPoles Raised if one of the weight value CPoleWeights (i) is lower or equal to Resolution from package gp.
Parameters:
  • UIndex (int) –
  • CPoleWeights (TColStd_Array1OfReal &) –
Return type:

None
UDegree()
  • Returns the degree of the surface in the U direction it is NbUPoles - 1
Return type:int
VDegree()
  • Returns the degree of the surface in the V direction it is NbVPoles - 1
Return type:int
Weight()
  • Returns the weight of range UIndex, VIndex //! Raised if UIndex < 1 or UIndex > NbUPoles, or VIndex < 1 or VIndex > NbVPoles.
Parameters:
  • UIndex (int) –
  • VIndex (int) –
Return type:

float
Weights()
  • Returns the weights of the Bezier surface. //! Raised if the length of W in the U an V direction is not equal to NbUPoles and NbVPoles.
Parameters:W (TColStd_Array2OfReal &) –
Return type:None
thisown

The membership flag

Geom_BezierSurface_MaxDegree()
  • Returns the value of the maximum polynomial degree of a Bezier surface. This value is 25.
Return type:int
class Geom_BoundedCurve(*args, **kwargs)

Bases: OCC.Geom.Geom_Curve

EndPoint()
  • Returns the end point of the curve.
Return type:gp_Pnt
GetHandle()
StartPoint()
  • Returns the start point of the curve.
Return type:gp_Pnt
thisown

The membership flag

class Geom_BoundedSurface(*args, **kwargs)

Bases: OCC.Geom.Geom_Surface

GetHandle()
thisown

The membership flag

class Geom_CartesianPoint(*args)

Bases: OCC.Geom.Geom_Point

  • Returns a transient copy of P.
Parameters:P (gp_Pnt) –
Return type:None
  • Constructs a point defined by its three Cartesian coordinates X, Y and Z.
Parameters:
Return type:

None
GetHandle()
SetCoord()
  • Assigns the coordinates X, Y and Z to this point.
Parameters:
Return type:

None
SetPnt()
  • Set <self> to P.X(), P.Y(), P.Z() coordinates.
Parameters:P (gp_Pnt) –
Return type:None
SetX()
  • Changes the X coordinate of me.
Parameters:X (float) –
Return type:None
SetY()
  • Changes the Y coordinate of me.
Parameters:Y (float) –
Return type:None
SetZ()
  • Changes the Z coordinate of me.
Parameters:Z (float) –
Return type:None
thisown

The membership flag

class Geom_Circle(*args)

Bases: OCC.Geom.Geom_Conic

  • Constructs a circle by conversion of the gp_Circ circle C.
Parameters:C (gp_Circ) –
Return type:None
  • Constructs a circle of radius Radius, where A2 locates the circle and defines its orientation in 3D space such that: - the center of the circle is the origin of A2, - the origin, ‘X Direction’ and ‘Y Direction’ of A2 define the plane of the circle, - A2 is the local coordinate system of the circle. Note: It is possible to create a circle where Radius is equal to 0.0. raised if Radius < 0.
Parameters:
Return type:

None
Circ()
  • returns the non transient circle from gp with the same geometric properties as <self>.
Return type:gp_Circ
GetHandle()
Radius()
  • Returns the radius of this circle.
Return type:float
SetCirc()
  • Set <self> so that <self> has the same geometric properties as C.
Parameters:C (gp_Circ) –
Return type:None
SetRadius()
  • Assigns the value R to the radius of this circle. Note: it is possible to have a circle with a radius equal to 0.0. Exceptions - Standard_ConstructionError if R is negative.
Parameters:R (float) –
Return type:None
thisown

The membership flag

class Geom_Conic(*args, **kwargs)

Bases: OCC.Geom.Geom_Curve

Axis()
  • Returns the ‘main Axis’ of this conic. This axis is normal to the plane of the conic.
Return type:gp_Ax1
Eccentricity()
  • Returns the eccentricity value of the conic e. e = 0 for a circle 0 < e < 1 for an ellipse (e = 0 if MajorRadius = MinorRadius) e > 1 for a hyperbola e = 1 for a parabola Exceptions Standard_DomainError in the case of a hyperbola if its major radius is null.
Return type:float
GetHandle()
Location()
  • Returns the location point of the conic. For the circle, the ellipse and the hyperbola it is the center of the conic. For the parabola it is the Apex of the parabola.
Return type:gp_Pnt
Position()
  • Returns the local coordinates system of the conic. The main direction of the Axis2Placement is normal to the plane of the conic. The X direction of the Axis2placement is in the plane of the conic and corresponds to the origin for the conic’s parametric value u.
Return type:gp_Ax2
SetAxis()
  • Changes the orientation of the conic’s plane. The normal axis to the plane is A1. The XAxis and the YAxis are recomputed. //! raised if the A1 is parallel to the XAxis of the conic.
Parameters:A1 (gp_Ax1) –
Return type:None
SetLocation()
  • changes the location point of the conic.
Parameters:P (gp_Pnt) –
Return type:None
SetPosition()
  • changes the local coordinate system of the conic.
Parameters:A2 (gp_Ax2) –
Return type:None
XAxis()
  • Returns the XAxis of the conic. This axis defines the origin of parametrization of the conic. This axis is perpendicular to the Axis of the conic. This axis and the Yaxis define the plane of the conic.
Return type:gp_Ax1
YAxis()
  • Returns the YAxis of the conic. The YAxis is perpendicular to the Xaxis. This axis and the Xaxis define the plane of the conic.
Return type:gp_Ax1
thisown

The membership flag

class Geom_ConicalSurface(*args)

Bases: OCC.Geom.Geom_ElementarySurface

  • A3 defines the local coordinate system of the conical surface. Ang is the conical surface semi-angle ]0, PI/2[. Radius is the radius of the circle Viso in the placement plane of the conical surface defined with ‘XAxis’ and ‘YAxis’. The ‘ZDirection’ of A3 defines the direction of the surface’s axis of symmetry. If the location point of A3 is the apex of the surface Radius = 0 . At the creation the parametrization of the surface is defined such that the normal Vector (N = D1U ^ D1V) is oriented towards the ‘outside region’ of the surface. //! Raised if Radius < 0.0 or Ang < Resolution from gp or Ang >= PI/2 - Resolution
Parameters:
Return type:

None
  • Creates a ConicalSurface from a non transient Cone from package gp.
Parameters:C (gp_Cone) –
Return type:None
Apex()
  • Computes the apex of this cone. It is on the negative side of the axis of revolution of this cone if the half-angle at the apex is positive, and on the positive side of the ‘main Axis’ if the half-angle is negative.
Return type:gp_Pnt
Coefficients()
  • Returns the coefficients of the implicit equation of the quadric in the absolute cartesian coordinate system : These coefficients are normalized. A1.X**2 + A2.Y**2 + A3.Z**2 + 2.(B1.X.Y + B2.X.Z + B3.Y.Z) + 2.(C1.X + C2.Y + C3.Z) + D = 0.0
Parameters:
  • A1 (float &) –
  • A2 (float &) –
  • A3 (float &) –
  • B1 (float &) –
  • B2 (float &) –
  • B3 (float &) –
  • C1 (float &) –
  • C2 (float &) –
  • C3 (float &) –
  • D (float &) –
Return type:

None
Cone()
  • returns a non transient cone with the same geometric properties as <self>.
Return type:gp_Cone
GetHandle()
RefRadius()
  • Returns the reference radius of this cone. The reference radius is the radius of the circle formed by the intersection of this cone and its reference plane (i.e. the plane defined by the origin, ‘X Direction’ and ‘Y Direction’ of the local coordinate system of this cone). If the apex of this cone is on the origin of the local coordinate system of this cone, the returned value is 0.
Return type:float
SemiAngle()
  • returns the semi-angle of the conical surface ]0.0, PI/2[.
Return type:float
SetCone()
  • Set <self> so that <self> has the same geometric properties as C.
Parameters:C (gp_Cone) –
Return type:None
SetRadius()
  • Changes the radius of the conical surface in the placement plane (Z = 0, V = 0). The local coordinate system is not modified. Raised if R < 0.0
Parameters:R (float) –
Return type:None
SetSemiAngle()
  • Changes the semi angle of the conical surface. //! Raised if Ang < Resolution or Ang >= PI/2 - Resolution
Parameters:Ang (float) –
Return type:None
thisown

The membership flag

class Geom_Curve(*args, **kwargs)

Bases: OCC.Geom.Geom_Geometry

Continuity()
  • It is the global continuity of the curve C0 : only geometric continuity, C1 : continuity of the first derivative all along the Curve, C2 : continuity of the second derivative all along the Curve, C3 : continuity of the third derivative all along the Curve, G1 : tangency continuity all along the Curve, G2 : curvature continuity all along the Curve, CN : the order of continuity is infinite.
Return type:GeomAbs_Shape
D0()
  • Returns in P the point of parameter U. If the curve is periodic then the returned point is P(U) with U = Ustart + (U - Uend) where Ustart and Uend are the parametric bounds of the curve. //! Raised only for the ‘OffsetCurve’ if it is not possible to compute the current point. For example when the first derivative on the basis curve and the offset direction are parallel.
Parameters:
Return type:

void
D1()
  • Returns the point P of parameter U and the first derivative V1. Raised if the continuity of the curve is not C1.
Parameters:
Return type:

void
D2()
  • Returns the point P of parameter U, the first and second derivatives V1 and V2. Raised if the continuity of the curve is not C2.
Parameters:
Return type:

void
D3()
  • Returns the point P of parameter U, the first, the second and the third derivative. Raised if the continuity of the curve is not C3.
Parameters:
Return type:

void
DN()
  • The returned vector gives the value of the derivative for the order of derivation N. Raised if the continuity of the curve is not CN. //! Raised if the derivative cannot be computed easily. e.g. rational bspline and n > 3. Raised if N < 1.
Parameters:
Return type:

gp_Vec
FirstParameter()
  • Returns the value of the first parameter. Warnings : It can be RealFirst from package Standard if the curve is infinite
Return type:float
GetHandle()
IsCN()
  • Returns true if the degree of continuity of this curve is at least N. Exceptions - Standard_RangeError if N is less than 0.
Parameters:N (int) –
Return type:bool
IsClosed()
  • Returns true if the curve is closed. Some curves such as circle are always closed, others such as line are never closed (by definition). Some Curves such as OffsetCurve can be closed or not. These curves are considered as closed if the distance between the first point and the last point of the curve is lower or equal to the Resolution from package gp wich is a fixed criterion independant of the application.
Return type:bool
IsPeriodic()
  • Is the parametrization of the curve periodic ? It is possible only if the curve is closed and if the following relation is satisfied : for each parametric value U the distance between the point P(u) and the point P (u + T) is lower or equal to Resolution from package gp, T is the period and must be a constant. There are three possibilities : . the curve is never periodic by definition (SegmentLine) . the curve is always periodic by definition (Circle) . the curve can be defined as periodic (BSpline). In this case a function SetPeriodic allows you to give the shape of the curve. The general rule for this case is : if a curve can be periodic or not the default periodicity set is non periodic and you have to turn (explicitly) the curve into a periodic curve if you want the curve to be periodic.
Return type:bool
LastParameter()
  • Returns the value of the last parameter. Warnings : It can be RealLast from package Standard if the curve is infinite
Return type:float
ParametricTransformation()
  • Returns a coefficient to compute the parameter on the transformed curve for the transform of the point on <self>. //! Transformed(T)->Value(U * ParametricTransformation(T)) //! is the same point as //! Value(U).Transformed(T) //! This methods returns 1. //! It can be redefined. For example on the Line.
Parameters:T (gp_Trsf) –
Return type:float
Period()
  • Returns the period of this curve. Exceptions Standard_NoSuchObject if this curve is not periodic.
Return type:float
Reverse()
  • Changes the direction of parametrization of <self>. The ‘FirstParameter’ and the ‘LastParameter’ are not changed but the orientation of the curve is modified. If the curve is bounded the StartPoint of the initial curve becomes the EndPoint of the reversed curve and the EndPoint of the initial curve becomes the StartPoint of the reversed curve.
Return type:void
Reversed()
  • Returns a copy of <self> reversed.
Return type:Handle_Geom_Curve
ReversedParameter()
  • Returns the parameter on the reversed curve for the point of parameter U on <self>. //! me->Reversed()->Value(me->ReversedParameter(U)) //! is the same point as //! me->Value(U)
Parameters:U (float) –
Return type:float
TransformedParameter()
  • Returns the parameter on the transformed curve for the transform of the point of parameter U on <self>. //! me->Transformed(T)->Value(me->TransformedParameter(U,T)) //! is the same point as //! me->Value(U).Transformed(T) //! This methods returns <U> //! It can be redefined. For example on the Line.
Parameters:
Return type:

float
Value()
  • Computes the point of parameter U on <self>. If the curve is periodic then the returned point is P(U) with U = Ustart + (U - Uend) where Ustart and Uend are the parametric bounds of the curve. it is implemented with D0. //! Raised only for the ‘OffsetCurve’ if it is not possible to compute the current point. For example when the first derivative on the basis curve and the offset direction are parallel.
Parameters:U (float) –
Return type:gp_Pnt
thisown

The membership flag

class Geom_CylindricalSurface(*args)

Bases: OCC.Geom.Geom_ElementarySurface

  • A3 defines the local coordinate system of the cylindrical surface. The ‘ZDirection’ of A3 defines the direction of the surface’s axis of symmetry. At the creation the parametrization of the surface is defined such that the normal Vector (N = D1U ^ D1V) is oriented towards the ‘outside region’ of the surface. Warnings : It is not forbidden to create a cylindrical surface with Radius = 0.0 Raised if Radius < 0.0
Parameters:
Return type:

None
  • Creates a CylindricalSurface from a non transient Cylinder from package gp.
Parameters:C (gp_Cylinder) –
Return type:None
Coefficients()
  • Returns the coefficients of the implicit equation of the quadric in the absolute cartesian coordinate system : These coefficients are normalized. A1.X**2 + A2.Y**2 + A3.Z**2 + 2.(B1.X.Y + B2.X.Z + B3.Y.Z) + 2.(C1.X + C2.Y + C3.Z) + D = 0.0
Parameters:
  • A1 (float &) –
  • A2 (float &) –
  • A3 (float &) –
  • B1 (float &) –
  • B2 (float &) –
  • B3 (float &) –
  • C1 (float &) –
  • C2 (float &) –
  • C3 (float &) –
  • D (float &) –
Return type:

None
Cylinder()
  • returns a non transient cylinder with the same geometric properties as <self>.
Return type:gp_Cylinder
GetHandle()
Radius()
  • Returns the radius of this cylinder.
Return type:float
SetCylinder()
  • Set <self> so that <self> has the same geometric properties as C.
Parameters:C (gp_Cylinder) –
Return type:None
SetRadius()
  • Changes the radius of the cylinder. Raised if R < 0.0
Parameters:R (float) –
Return type:None
thisown

The membership flag

class Geom_Direction(*args)

Bases: OCC.Geom.Geom_Vector

  • Creates a unit vector with it 3 cartesian coordinates. //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
Parameters:
Return type:

None
  • Creates a transient copy of <self>.
Parameters:V (gp_Dir) –
Return type:None
Dir()
  • Returns the non transient direction with the same coordinates as <self>.
Return type:gp_Dir
GetHandle()
SetCoord()
  • Sets <self> to X,Y,Z coordinates. //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
Parameters:
Return type:

None
SetDir()
  • Converts the gp_Dir unit vector V into this unit vector.
Parameters:V (gp_Dir) –
Return type:None
SetX()
  • Changes the X coordinate of <self>. //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
Parameters:X (float) –
Return type:None
SetY()
  • Changes the Y coordinate of <self>. //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
Parameters:Y (float) –
Return type:None
SetZ()
  • Changes the Z coordinate of <self>. //! Raised if Sqrt( X*X + Y*Y + Z*Z) <= Resolution from gp.
Parameters:Z (float) –
Return type:None
thisown

The membership flag

class Geom_ElementarySurface(*args, **kwargs)

Bases: OCC.Geom.Geom_Surface

Axis()
  • Returns the main axis of the surface (ZAxis).
Return type:gp_Ax1
GetHandle()
Location()
  • Returns the location point of the local coordinate system of the surface.
Return type:gp_Pnt
Position()
  • Returns the local coordinates system of the surface.
Return type:gp_Ax3
SetAxis()
  • Changes the main axis (ZAxis) of the elementary surface. //! Raised if the direction of A1 is parallel to the XAxis of the coordinate system of the surface.
Parameters:A1 (gp_Ax1) –
Return type:None
SetLocation()
  • Changes the location of the local coordinates system of the surface.
Parameters:Loc (gp_Pnt) –
Return type:None
SetPosition()
  • Changes the local coordinates system of the surface.
Parameters:A3 (gp_Ax3) –
Return type:None
thisown

The membership flag

class Geom_Ellipse(*args)

Bases: OCC.Geom.Geom_Conic

  • Constructs an ellipse by conversion of the gp_Elips ellipse E.
Parameters:E (gp_Elips) –
Return type:None
  • Constructs an ellipse defined by its major and minor radii, MajorRadius and MinorRadius, where A2 locates the ellipse and defines its orientation in 3D space such that: - the center of the ellipse is the origin of A2, - the ‘X Direction’ of A2 defines the major axis of the ellipse, i.e. the major radius MajorRadius is measured along this axis, - the ‘Y Direction’ of A2 defines the minor axis of the ellipse, i.e. the minor radius MinorRadius is measured along this axis, - A2 is the local coordinate system of the ellipse. Exceptions Standard_ConstructionError if: - MajorRadius is less than MinorRadius, or - MinorRadius is less than 0. Warning The Geom package does not prevent the construction of an ellipse where MajorRadius and MinorRadius are equal.
Parameters:
Return type:

None
Directrix1()
  • This directrix is the line normal to the XAxis of the ellipse in the local plane (Z = 0) at a distance d = MajorRadius / e from the center of the ellipse, where e is the eccentricity of the ellipse. This line is parallel to the ‘YAxis’. The intersection point between directrix1 and the ‘XAxis’ is the ‘Location’ point of the directrix1. This point is on the positive side of the ‘XAxis’. Raised if Eccentricity = 0.0. (The ellipse degenerates into a circle)
Return type:gp_Ax1
Directrix2()
  • This line is obtained by the symmetrical transformation of ‘Directrix1’ with respect to the ‘YAxis’ of the ellipse. //! Raised if Eccentricity = 0.0. (The ellipse degenerates into a circle).
Return type:gp_Ax1
Elips()
  • returns the non transient ellipse from gp with the same
Return type:gp_Elips
Focal()
  • Computes the focal distance. It is the distance between the the two focus of the ellipse.
Return type:float
Focus1()
  • Returns the first focus of the ellipse. This focus is on the positive side of the ‘XAxis’ of the ellipse.
Return type:gp_Pnt
Focus2()
  • Returns the second focus of the ellipse. This focus is on the negative side of the ‘XAxis’ of the ellipse.
Return type:gp_Pnt
GetHandle()
MajorRadius()
  • Returns the major radius of this ellipse.
Return type:float
MinorRadius()
  • Returns the minor radius of this ellipse.
Return type:float
Parameter()
  • Returns p = (1 - e * e) * MajorRadius where e is the eccentricity of the ellipse. Returns 0 if MajorRadius = 0
Return type:float
SetElips()
  • Converts the gp_Elips ellipse E into this ellipse.
Parameters:E (gp_Elips) –
Return type:None
SetMajorRadius()
  • Assigns a value to the major radius of this ellipse. ConstructionError raised if MajorRadius < MinorRadius.
Parameters:MajorRadius (float) –
Return type:None
SetMinorRadius()
  • Assigns a value to the minor radius of this ellipse. ConstructionError raised if MajorRadius < MinorRadius or if MinorRadius < 0.
Parameters:MinorRadius (float) –
Return type:None
thisown

The membership flag

class Geom_Geometry(*args, **kwargs)

Bases: OCC.MMgt.MMgt_TShared

Copy()
  • Creates a new object which is a copy of this geometric object.
Return type:Handle_Geom_Geometry
GetHandle()
Mirror()
  • Performs the symmetrical transformation of a Geometry with respect to the point P which is the center of the symmetry.
Parameters:P (gp_Pnt) –
Return type:None
  • Performs the symmetrical transformation of a Geometry with respect to an axis placement which is the axis of the symmetry.
Parameters:A1 (gp_Ax1) –
Return type:None
  • Performs the symmetrical transformation of a Geometry with respect to a plane. The axis placement A2 locates the plane of the symmetry : (Location, XDirection, YDirection).
Parameters:A2 (gp_Ax2) –
Return type:None
Mirrored()
Parameters:
Return type:

Handle_Geom_Geometry
Return type:

Handle_Geom_Geometry
Return type:

Handle_Geom_Geometry
Rotate()
  • Rotates a Geometry. A1 is the axis of the rotation. Ang is the angular value of the rotation in radians.
Parameters:
Return type:

None
Rotated()
Parameters:
Return type:

Handle_Geom_Geometry
Scale()
  • Scales a Geometry. S is the scaling value.
Parameters:
Return type:

None
Scaled()
Parameters:
Return type:

Handle_Geom_Geometry
Transform()
  • Transformation of a geometric object. This tansformation can be a translation, a rotation, a symmetry, a scaling or a complex transformation obtained by combination of the previous elementaries transformations. (see class Transformation of the package Geom).
Parameters:T (gp_Trsf) –
Return type:void
Transformed()
Parameters:T (gp_Trsf) –
Return type:Handle_Geom_Geometry
Translate()
  • Translates a Geometry. V is the vector of the tanslation.
Parameters:V (gp_Vec) –
Return type:None
  • Translates a Geometry from the point P1 to the point P2.
Parameters:
Return type:

None
Translated()
Parameters:
Return type:

Handle_Geom_Geometry
Return type:

Handle_Geom_Geometry
thisown

The membership flag

class Geom_HSequenceOfBSplineSurface(*args)

Bases: OCC.MMgt.MMgt_TShared

Return type:None
Append()
Parameters:
  • anItem (Handle_Geom_BSplineSurface &) –
  • aSequence (Handle_Geom_HSequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
ChangeSequence()
Return type:Geom_SequenceOfBSplineSurface
ChangeValue()
Parameters:anIndex (int) –
Return type:Handle_Geom_BSplineSurface
Clear()
Return type:None
Exchange()
Parameters:
  • anIndex (int) –
  • anOtherIndex (int) –
Return type:

None
GetHandle()
InsertAfter()
Parameters:
  • anIndex (int) –
  • anItem (Handle_Geom_BSplineSurface &) –
  • anIndex –
  • aSequence (Handle_Geom_HSequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
InsertBefore()
Parameters:
  • anIndex (int) –
  • anItem (Handle_Geom_BSplineSurface &) –
  • anIndex –
  • aSequence (Handle_Geom_HSequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
IsEmpty()
Return type:bool
Length()
Return type:int
Prepend()
Parameters:
  • anItem (Handle_Geom_BSplineSurface &) –
  • aSequence (Handle_Geom_HSequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
Remove()
Parameters:
  • anIndex (int) –
  • fromIndex (int) –
  • toIndex (int) –
Return type:

None
Return type:

None
Reverse()
Return type:None
Sequence()
Return type:Geom_SequenceOfBSplineSurface
SetValue()
Parameters:
  • anIndex (int) –
  • anItem (Handle_Geom_BSplineSurface &) –
Return type:

None
Split()
Parameters:anIndex (int) –
Return type:Handle_Geom_HSequenceOfBSplineSurface
Value()
Parameters:anIndex (int) –
Return type:Handle_Geom_BSplineSurface
thisown

The membership flag

class Geom_Hyperbola(*args)

Bases: OCC.Geom.Geom_Conic

  • Constructs a hyperbola by conversion of the gp_Hypr hyperbola H.
Parameters:H (gp_Hypr) –
Return type:None
  • Constructs a hyperbola defined by its major and minor radii, MajorRadius and MinorRadius, where A2 locates the hyperbola and defines its orientation in 3D space such that: - the center of the hyperbola is the origin of A2, - the ‘X Direction’ of A2 defines the major axis of the hyperbola, i.e. the major radius MajorRadius is measured along this axis, - the ‘Y Direction’ of A2 defines the minor axis of the hyperbola, i.e. the minor radius MinorRadius is measured along this axis, - A2 is the local coordinate system of the hyperbola. Exceptions Standard_ConstructionError if: - MajorRadius is less than 0.0, - MinorRadius is less than 0.0.
Parameters:
Return type:

None
Asymptote1()
  • In the local coordinate system of the hyperbola the equation of the hyperbola is (X*X)/(A*A) - (Y*Y)/(B*B) = 1.0 and the equation of the first asymptote is Y = (B/A)*X. Raises ConstructionError if MajorRadius = 0.0
Return type:gp_Ax1
Asymptote2()
  • In the local coordinate system of the hyperbola the equation of the hyperbola is (X*X)/(A*A) - (Y*Y)/(B*B) = 1.0 and the equation of the first asymptote is Y = -(B/A)*X. Raises ConstructionError if MajorRadius = 0.0
Return type:gp_Ax1
ConjugateBranch1()
  • This branch of hyperbola is on the positive side of the YAxis of <self>.
Return type:gp_Hypr
ConjugateBranch2()
  • This branch of hyperbola is on the negative side of the YAxis of <self>. Note: The diagram given under the class purpose indicates where these two branches of hyperbola are positioned in relation to this branch of hyperbola.
Return type:gp_Hypr
Directrix1()
  • This directrix is the line normal to the XAxis of the hyperbola in the local plane (Z = 0) at a distance d = MajorRadius / e from the center of the hyperbola, where e is the eccentricity of the hyperbola. This line is parallel to the YAxis. The intersection point between directrix1 and the XAxis is the location point of the directrix1. This point is on the positive side of the XAxis.
Return type:gp_Ax1
Directrix2()
  • This line is obtained by the symmetrical transformation of ‘directrix1’ with respect to the YAxis of the hyperbola.
Return type:gp_Ax1
Focal()
  • Computes the focal distance. It is the distance between the two focus of the hyperbola.
Return type:float
Focus1()
  • Returns the first focus of the hyperbola. This focus is on the positive side of the XAxis of the hyperbola.
Return type:gp_Pnt
Focus2()
  • Returns the second focus of the hyperbola. This focus is on the negative side of the XAxis of the hyperbola.
Return type:gp_Pnt
GetHandle()
Hypr()
  • returns the non transient parabola from gp with the same geometric properties as <self>.
Return type:gp_Hypr
MajorRadius()
  • Returns the major or minor radius of this hyperbola. The major radius is also the distance between the center of the hyperbola and the apex of the main branch (located on the ‘X Axis’ of the hyperbola).
Return type:float
MinorRadius()
  • Returns the major or minor radius of this hyperbola. The minor radius is also the distance between the center of the hyperbola and the apex of a conjugate branch (located on the ‘Y Axis’ of the hyperbola).
Return type:float
OtherBranch()
  • Computes the ‘other’ branch of this hyperbola. This is the symmetrical branch with respect to the center of this hyperbola. Note: The diagram given under the class purpose indicates where the ‘other’ branch is positioned in relation to this branch of the hyperbola.
Return type:gp_Hypr
Parameter()
  • Returns p = (e * e - 1) * MajorRadius where e is the eccentricity of the hyperbola. raised if MajorRadius = 0.0
Return type:float
SetHypr()
  • Converts the gp_Hypr hyperbola H into this hyperbola.
Parameters:H (gp_Hypr) –
Return type:None
SetMajorRadius()
  • Assigns a value to the major radius of this hyperbola. Exceptions Standard_ConstructionError if: - MajorRadius is less than 0.0, or - MinorRadius is less than 0.0.Raised if MajorRadius < 0.0
Parameters:MajorRadius (float) –
Return type:None
SetMinorRadius()
  • Assigns a value to the minor radius of this hyperbola. Exceptions Standard_ConstructionError if: - MajorRadius is less than 0.0, or - MinorRadius is less than 0.0.Raised if MajorRadius < 0.0
Parameters:MinorRadius (float) –
Return type:None
thisown

The membership flag

class Geom_Line(*args)

Bases: OCC.Geom.Geom_Curve

  • Creates a line located in 3D space with the axis placement A1. The Location of A1 is the origin of the line.
Parameters:A1 (gp_Ax1) –
Return type:None
  • Creates a line from a non transient line from package gp.
Parameters:L (gp_Lin) –
Return type:None
  • Constructs a line passing through point P and parallel to vector V (P and V are, respectively, the origin and the unit vector of the positioning axis of the line).
Parameters:
Return type:

None
GetHandle()
Lin()
  • Returns non transient line from gp with the same geometric properties as <self>
Return type:gp_Lin
Position()
  • Returns the positioning axis of this line; this is also its local coordinate system.
Return type:gp_Ax1
SetDirection()
  • changes the direction of the line.
Parameters:V (gp_Dir) –
Return type:None
SetLin()
  • Set <self> so that <self> has the same geometric properties as L.
Parameters:L (gp_Lin) –
Return type:None
SetLocation()
  • changes the ‘Location’ point (origin) of the line.
Parameters:P (gp_Pnt) –
Return type:None
SetPosition()
  • changes the ‘Location’ and a the ‘Direction’ of <self>.
Parameters:A1 (gp_Ax1) –
Return type:None
thisown

The membership flag

class Geom_OffsetCurve(*args)

Bases: OCC.Geom.Geom_Curve

  • C is the basis curve, Offset is the distance between <self> and the basis curve at any point. V defines the fixed reference direction (offset direction). If P is a point on the basis curve and T the first derivative with non zero length at this point, the corresponding point on the offset curve is in the direction of the vector-product N = V ^ T where N is a unitary vector. If isNotCheckC0 = True checking if basis curve has C0-continuity is not made. Warnings : In this package the entities are not shared. The OffsetCurve is built with a copy of the curve C. So when C is modified the OffsetCurve is not modified //! Raised if the basis curve C is not at least C1. Warnings : No check is done to know if ||V^T|| != 0.0 at any point.
Parameters:
  • C (Handle_Geom_Curve &) –
  • Offset (float) –
  • V (gp_Dir) –
  • isNotCheckC0 (bool) – default value is Standard_False
Return type:

None
BasisCurve()
  • Returns the basis curve of this offset curve. Note: The basis curve can be an offset curve.
Return type:Handle_Geom_Curve
D0()
  • Warning! this should not be called if the basis curve is not at least C1. Nevertheless if used on portion where the curve is C1, it is OK
Parameters:
Return type:

None
  • Warning! this should not be called if the continuity of the basis curve is not C1. Nevertheless, it’s OK to use it on portion where the curve is C1
Parameters:
Return type:

None
D1()
  • Warning! this should not be called if the continuity of the basis curve is not C2. Nevertheless, it’s OK to use it on portion where the curve is C2
Parameters:
Return type:

None
  • Warning! this should not be called if the continuity of the basis curve is not C1. Nevertheless, it’s OK to use it on portion where the curve is C1
Parameters:
Return type:

None
D2()
  • Warning! this should not be called if the continuity of the basis curve is not C3. Nevertheless, it’s OK to use it on portion where the curve is C3
Parameters:
Return type:

None
  • Warning! this should not be called if the continuity of the basis curve is not C3. Nevertheless, it’s OK to use it on portion where the curve is C3
Parameters:
Return type:

None
Direction()
  • Returns the reference vector of this offset curve. Value and derivatives Warnings : The exception UndefinedValue or UndefinedDerivative is raised if it is not possible to compute a unique offset direction. If T is the first derivative with not null length and V the offset direction the relation ||T(U) ^ V|| != 0 must be satisfied to evaluate the offset curve. No check is done at the creation time and we suppose in this package that the offset curve is well defined.
Return type:gp_Dir
GetBasisCurveContinuity()
  • Returns continuity of the basis curve.
Return type:GeomAbs_Shape
GetHandle()
Offset()
  • Returns the offset value of this offset curve.
Return type:float
SetBasisCurve()
  • Changes this offset curve by assigning C as the basis curve from which it is built. If isNotCheckC0 = True checking if basis curve has C0-continuity is not made. Exceptions Standard_ConstructionError if the curve C is not at least ‘C1’ continuous.
Parameters:
  • C (Handle_Geom_Curve &) –
  • isNotCheckC0 (bool) – default value is Standard_False
Return type:

None
SetDirection()
  • Changes this offset curve by assigning V as the reference vector used to compute the offset direction.
Parameters:V (gp_Dir) –
Return type:None
SetOffsetValue()
  • Changes this offset curve by assigning D as the offset value.
Parameters:D (float) –
Return type:None
Value()
  • Warning! this should not be called if the basis curve is not at least C1. Nevertheless if used on portion where the curve is C1, it is OK
Parameters:
Return type:

None
thisown

The membership flag

class Geom_OffsetSurface(*args)

Bases: OCC.Geom.Geom_Surface

  • Constructs a surface offset from the basis surface S, where Offset is the distance between the offset surface and the basis surface at any point. A point on the offset surface is built by measuring the offset value along a normal vector at a point on S. This normal vector is given by the cross product D1u^D1v, where D1u and D1v are the vectors tangential to the basis surface in the u and v parametric directions at this point. The side of S on which the offset value is measured is indicated by this normal vector if Offset is positive, or is the inverse sense if Offset is negative. If isNotCheckC0 = True checking if basis surface has C0-continuity is not made. Warnings : - The offset surface is built with a copy of the surface S. Therefore, when S is modified the offset surface is not modified. - No check is made at the time of construction to detect points on S with multiple possible normal directions. Raised if S is not at least C1. Warnings : No check is done to verify that a unique normal direction is defined at any point of the basis surface S.
Parameters:
  • S (Handle_Geom_Surface &) –
  • Offset (float) –
  • isNotCheckC0 (bool) – default value is Standard_False
Return type:

None
BasisSurface()
  • Returns the basis surface of this offset surface. Note: The basis surface can be an offset surface.
Return type:Handle_Geom_Surface
D1()
  • Raised if the continuity of the basis surface is not C2.
Parameters:
Return type:

None
  • Raised if the continuity of the basis surface is not C2.
Parameters:
Return type:

None
D2()
  • —Purpose ; Raised if the continuity of the basis surface is not C3.
Parameters:
Return type:

None
  • Raised if the continuity of the basis surface is not C3. The following private methods includes common part of local and global methods of derivative evaluations.
Parameters:
Return type:

None
GetBasisSurfContinuity()
  • Returns continuity of the basis surface.
Return type:GeomAbs_Shape
GetHandle()
LocalD0()
Parameters:
Return type:

None
LocalD1()
Parameters:
Return type:

None
LocalD2()
Parameters:
Return type:

None
LocalD3()
Parameters:
Return type:

None
LocalDN()
Parameters:
Return type:

gp_Vec
Offset()
  • Returns the offset value of this offset surface.
Return type:float
SetBasisSurface()
  • Raised if S is not at least C1. Warnings : No check is done to verify that a unique normal direction is defined at any point of the basis surface S. If isNotCheckC0 = True checking if basis surface has C0-continuity is not made. Exceptions Standard_ConstructionError if the surface S is not at least ‘C1’ continuous.
Parameters:
  • S (Handle_Geom_Surface &) –
  • isNotCheckC0 (bool) – default value is Standard_False
Return type:

None
SetOffsetValue()
  • Changes this offset surface by assigning D as the offset value.
Parameters:D (float) –
Return type:None
Surface()
  • returns an equivalent surface of the offset surface when the basis surface is a canonic surface or a rectangular limited surface on canonic surface or if the offset is null.
Return type:Handle_Geom_Surface
UOsculatingSurface()
  • if Standard_True, L is the local osculating surface along U at the point U,V. It means that DL/DU is collinear to DS/DU . If IsOpposite == Standard_True these vectors have opposite direction.
Parameters:
  • U (float) –
  • V (float) –
  • IsOpposite (bool) –
  • UOsculSurf (Handle_Geom_BSplineSurface &) –
Return type:

bool
VOsculatingSurface()
  • if Standard_True, L is the local osculating surface along V at the point U,V. It means that DL/DV is collinear to DS/DV . If IsOpposite == Standard_True these vectors have opposite direction.
Parameters:
  • U (float) –
  • V (float) –
  • IsOpposite (bool) –
  • VOsculSurf (Handle_Geom_BSplineSurface &) –
Return type:

bool
Value()
  • P (U, V) = Pbasis + Offset * Ndir where Ndir = D1Ubasis ^ D1Vbasis / ||D1Ubasis ^ D1Vbasis|| is the normal direction of the surface. If Ndir is undefined this method computes an approched normal direction using the following limited development : Ndir = N0 + DNdir/DU + DNdir/DV + Eps with Eps->0 which requires to compute the second derivatives on the basis surface. If the normal direction cannot be approximate for this order of derivation the exception UndefinedValue is raised. //! Raised if the continuity of the basis surface is not C1. Raised if the order of derivation required to compute the normal direction is greater than the second order.
Parameters:
Return type:

None
thisown

The membership flag

class Geom_OsculatingSurface(*args)

Bases: object

Return type:None
  • detects if the surface has punctual U or V isoparametric curve along on the bounds of the surface relativly to the tolerance Tol and Builds the corresponding osculating surfaces.
Parameters:
  • BS (Handle_Geom_Surface &) –
  • Tol (float) –
Return type:

None
BasisSurface()
Return type:Handle_Geom_Surface
Init()
Parameters:
  • BS (Handle_Geom_Surface &) –
  • Tol (float) –
Return type:

None
Tolerance()
Return type:float
UOscSurf()
  • if Standard_True, L is the local osculating surface along U at the point U,V.
Parameters:
  • U (float) –
  • V (float) –
  • t (bool) –
  • L (Handle_Geom_BSplineSurface &) –
Return type:

bool
VOscSurf()
  • if Standard_True, L is the local osculating surface along V at the point U,V.
Parameters:
  • U (float) –
  • V (float) –
  • t (bool) –
  • L (Handle_Geom_BSplineSurface &) –
Return type:

bool
thisown

The membership flag

class Geom_Parabola(*args)

Bases: OCC.Geom.Geom_Conic

  • Creates a parabola from a non transient one.
Parameters:Prb (gp_Parab) –
Return type:None
  • Creates a parabola with its local coordinate system ‘A2’ and it’s focal length ‘Focal’. The XDirection of A2 defines the axis of symmetry of the parabola. The YDirection of A2 is parallel to the directrix of the parabola. The Location point of A2 is the vertex of the parabola Raised if Focal < 0.0
Parameters:
Return type:

None
  • D is the directrix of the parabola and F the focus point. The symmetry axis (XAxis) of the parabola is normal to the directrix and pass through the focus point F, but its location point is the vertex of the parabola. The YAxis of the parabola is parallel to D and its location point is the vertex of the parabola. The normal to the plane of the parabola is the cross product between the XAxis and the YAxis.
Parameters:
Return type:

None
Directrix()
  • Computes the directrix of this parabola. This is a line normal to the axis of symmetry, in the plane of this parabola, located on the negative side of its axis of symmetry, at a distance from the apex equal to the focal length. The directrix is returned as an axis (gp_Ax1 object), where the origin is located on the ‘X Axis’ of this parabola.
Return type:gp_Ax1
Focal()
  • Computes the focal distance of this parabola The focal distance is the distance between the apex and the focus of the parabola.
Return type:float
Focus()
  • Computes the focus of this parabola. The focus is on the positive side of the ‘X Axis’ of the local coordinate system of the parabola.
Return type:gp_Pnt
GetHandle()
Parab()
  • Returns the non transient parabola from gp with the same geometric properties as <self>.
Return type:gp_Parab
Parameter()
  • Computes the parameter of this parabola which is the distance between its focus and its directrix. This distance is twice the focal length. If P is the parameter of the parabola, the equation of the parabola in its local coordinate system is: Y**2 = 2.*P*X.
Return type:float
SetFocal()
  • Assigns the value Focal to the focal distance of this parabola. Exceptions Standard_ConstructionError if Focal is negative.
Parameters:Focal (float) –
Return type:None
SetParab()
  • Converts the gp_Parab parabola Prb into this parabola.
Parameters:Prb (gp_Parab) –
Return type:None
thisown

The membership flag

class Geom_Plane(*args)

Bases: OCC.Geom.Geom_ElementarySurface

  • Creates a plane located in 3D space with an axis placement three axis. The ‘ZDirection’ of ‘A3’ is the direction normal to the plane. The ‘Location’ point of ‘A3’ is the origin of the plane. The ‘XDirection’ and ‘YDirection’ of ‘A3’ define the directions of the U isoparametric and V isoparametric curves.
Parameters:A3 (gp_Ax3) –
Return type:None
  • Creates a plane from a non transient plane from package gp.
Parameters:Pl (gp_Pln) –
Return type:None
  • P is the ‘Location’ point or origin of the plane. V is the direction normal to the plane.
Parameters:
Return type:

None
  • Creates a plane from its cartesian equation : Ax + By + Cz + D = 0.0 //! Raised if Sqrt (A*A + B*B + C*C) <= Resolution from gp
Parameters:
Return type:

None
Coefficients()
  • Computes the normalized coefficients of the plane’s cartesian equation : Ax + By + Cz + D = 0.0
Parameters:
  • A (float &) –
  • B (float &) –
  • C (float &) –
  • D (float &) –
Return type:

None
GetHandle()
Pln()
  • Converts this plane into a gp_Pln plane.
Return type:gp_Pln
SetPln()
  • Set <self> so that <self> has the same geometric properties as Pl.
Parameters:Pl (gp_Pln) –
Return type:None
thisown

The membership flag

class Geom_Point(*args, **kwargs)

Bases: OCC.Geom.Geom_Geometry

Coord()
  • returns the Coordinates of <self>.
Parameters:
  • X (float &) –
  • Y (float &) –
  • Z (float &) –
Return type:

void
Distance()
  • Computes the distance between <self> and <Other>.
Parameters:Other (Handle_Geom_Point &) –
Return type:float
GetHandle()
Pnt()
  • returns a non transient copy of <self>
Return type:gp_Pnt
SquareDistance()
  • Computes the square distance between <self> and <Other>.
Parameters:Other (Handle_Geom_Point &) –
Return type:float
X()
  • returns the X coordinate of <self>.
Return type:float
Y()
  • returns the Y coordinate of <self>.
Return type:float
Z()
  • returns the Z coordinate of <self>.
Return type:float
thisown

The membership flag

class Geom_RectangularTrimmedSurface(*args)

Bases: OCC.Geom.Geom_BoundedSurface

  • The U parametric direction of the surface is oriented from U1 to U2. The V parametric direction of the surface is oriented from V1 to V2. These two directions define the orientation of the surface (normal). If the surface is not periodic USense and VSense are not used for the construction. If the surface S is periodic in one direction USense and VSense give the available part of the surface. By default in this case the surface has the same orientation as the basis surface S. The returned surface is not closed and not periodic. ConstructionError Raised if S is not periodic in the UDirection and U1 or U2 are out of the bounds of S. S is not periodic in the VDirection and V1 or V2 are out of the bounds of S. U1 = U2 or V1 = V2
Parameters:
  • S (Handle_Geom_Surface &) –
  • U1 (float) –
  • U2 (float) –
  • V1 (float) –
  • V2 (float) –
  • USense (bool) – default value is Standard_True
  • VSense (bool) – default value is Standard_True
Return type:

None
  • The basis surface S is only trim in one parametric direction. If UTrim = True the surface is trimmed in the U parametric direction else the surface is trimmed in the V parametric direction. In the considered parametric direction the resulting surface is oriented from Param1 to Param2. If S is periodic Sense gives the available part of the surface. By default the trimmed surface has the same orientation as the basis surface S in the considered parametric direction (Sense = True). If the basis surface S is closed or periodic in the parametric direction opposite to the trimming direction the trimmed surface has the same characteristics as the surface S in this direction. Warnings : In this package the entities are not shared. The RectangularTrimmedSurface is built with a copy of the surface S. So when S is modified the RectangularTrimmedSurface is not modified Raised if S is not periodic in the considered parametric direction and Param1 or Param2 are out of the bounds of S. Param1 = Param2
Parameters:
  • S (Handle_Geom_Surface &) –
  • Param1 (float) –
  • Param2 (float) –
  • UTrim (bool) –
  • Sense (bool) – default value is Standard_True
Return type:

None
BasisSurface()
  • Returns the Basis surface of <self>.
Return type:Handle_Geom_Surface
GetHandle()
SetTrim()
  • Modifies this patch by changing the trim values applied to the original surface The u parametric direction of this patch is oriented from U1 to U2. The v parametric direction of this patch is oriented from V1 to V2. USense and VSense are used for the construction only if the surface is periodic in the corresponding parametric direction, and define the available part of the surface; by default in this case, this patch has the same orientation as the basis surface. Raised if The BasisSurface is not periodic in the UDirection and U1 or U2 are out of the bounds of the BasisSurface. The BasisSurface is not periodic in the VDirection and V1 or V2 are out of the bounds of the BasisSurface. U1 = U2 or V1 = V2
Parameters:
  • U1 (float) –
  • U2 (float) –
  • V1 (float) –
  • V2 (float) –
  • USense (bool) – default value is Standard_True
  • VSense (bool) – default value is Standard_True
Return type:

None
  • Modifies this patch by changing the trim values applied to the original surface The basis surface is trimmed only in one parametric direction: if UTrim is true, the surface is trimmed in the u parametric direction; if it is false, it is trimmed in the v parametric direction. In the ‘trimmed’ direction, this patch is oriented from Param1 to Param2. If the basis surface is periodic in the ‘trimmed’ direction, Sense defines its available part. By default in this case, this patch has the same orientation as the basis surface in this parametric direction. If the basis surface is closed or periodic in the other parametric direction (i.e. not the ‘trimmed’ direction), this patch has the same characteristics as the basis surface in that parametric direction. Raised if The BasisSurface is not periodic in the considered direction and Param1 or Param2 are out of the bounds of the BasisSurface. Param1 = Param2
Parameters:
  • Param1 (float) –
  • Param2 (float) –
  • UTrim (bool) –
  • Sense (bool) – default value is Standard_True
Return type:

None
thisown

The membership flag

class Geom_SequenceNodeOfSequenceOfBSplineSurface(*args)

Bases: OCC.TCollection.TCollection_SeqNode

Parameters:
  • I (Handle_Geom_BSplineSurface &) –
  • n (TCollection_SeqNodePtr &) –
  • p (TCollection_SeqNodePtr &) –
Return type:

None
GetHandle()
Value()
Return type:Handle_Geom_BSplineSurface
thisown

The membership flag

class Geom_SequenceOfBSplineSurface(*args)

Bases: OCC.TCollection.TCollection_BaseSequence

Return type:None
Parameters:Other (Geom_SequenceOfBSplineSurface &) –
Return type:None
Append()
Parameters:
  • T (Handle_Geom_BSplineSurface &) –
  • S (Geom_SequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
Assign()
Parameters:Other (Geom_SequenceOfBSplineSurface &) –
Return type:Geom_SequenceOfBSplineSurface
ChangeValue()
Parameters:Index (int) –
Return type:Handle_Geom_BSplineSurface
Clear()
Return type:None
First()
Return type:Handle_Geom_BSplineSurface
InsertAfter()
Parameters:
  • Index (int) –
  • T (Handle_Geom_BSplineSurface &) –
  • Index –
  • S (Geom_SequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
InsertBefore()
Parameters:
  • Index (int) –
  • T (Handle_Geom_BSplineSurface &) –
  • Index –
  • S (Geom_SequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
Last()
Return type:Handle_Geom_BSplineSurface
Prepend()
Parameters:
  • T (Handle_Geom_BSplineSurface &) –
  • S (Geom_SequenceOfBSplineSurface &) –
Return type:

None
Return type:

None
Remove()
Parameters:
  • Index (int) –
  • FromIndex (int) –
  • ToIndex (int) –
Return type:

None
Return type:

None
Set()
Parameters:Other (Geom_SequenceOfBSplineSurface &) –
Return type:Geom_SequenceOfBSplineSurface
SetValue()
Parameters:
  • Index (int) –
  • I (Handle_Geom_BSplineSurface &) –
Return type:

None
Split()
Parameters:
  • Index (int) –
  • Sub (Geom_SequenceOfBSplineSurface &) –
Return type:

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

The membership flag

class Geom_SphericalSurface(*args)

Bases: OCC.Geom.Geom_ElementarySurface

  • A3 is the local coordinate system of the surface. At the creation the parametrization of the surface is defined such as the normal Vector (N = D1U ^ D1V) is directed away from the center of the sphere. The direction of increasing parametric value V is defined by the rotation around the ‘YDirection’ of A2 in the trigonometric sense and the orientation of increasing parametric value U is defined by the rotation around the main direction of A2 in the trigonometric sense. Warnings : It is not forbidden to create a spherical surface with Radius = 0.0 Raised if Radius < 0.0.
Parameters:
Return type:

None
  • Creates a SphericalSurface from a non persistent Sphere from package gp.
Parameters:S (gp_Sphere) –
Return type:None
Area()
  • Computes the aera of the spherical surface.
Return type:float
Coefficients()
  • Returns the coefficients of the implicit equation of the quadric in the absolute cartesian coordinates system : These coefficients are normalized. A1.X**2 + A2.Y**2 + A3.Z**2 + 2.(B1.X.Y + B2.X.Z + B3.Y.Z) + 2.(C1.X + C2.Y + C3.Z) + D = 0.0
Parameters:
  • A1 (float &) –
  • A2 (float &) –
  • A3 (float &) –
  • B1 (float &) –
  • B2 (float &) –
  • B3 (float &) –
  • C1 (float &) –
  • C2 (float &) –
  • C3 (float &) –
  • D (float &) –
Return type:

None
GetHandle()
Radius()
  • Computes the coefficients of the implicit equation of this quadric in the absolute Cartesian coordinate system: A1.X**2 + A2.Y**2 + A3.Z**2 + 2.(B1.X.Y + B2.X.Z + B3.Y.Z) + 2.(C1.X + C2.Y + C3.Z) + D = 0.0 An implicit normalization is applied (i.e. A1 = A2 = 1. in the local coordinate system of this sphere).
Return type:float
SetRadius()
  • Assigns the value R to the radius of this sphere. Exceptions Standard_ConstructionError if R is less than 0.0.
Parameters:R (float) –
Return type:None
SetSphere()
  • Converts the gp_Sphere S into this sphere.
Parameters:S (gp_Sphere) –
Return type:None
Sphere()
  • Returns a non persistent sphere with the same geometric properties as <self>.
Return type:gp_Sphere
Volume()
  • Computes the volume of the spherical surface.
Return type:float
thisown

The membership flag

class Geom_Surface(*args, **kwargs)

Bases: OCC.Geom.Geom_Geometry

Bounds()
  • Returns the parametric bounds U1, U2, V1 and V2 of this surface. If the surface is infinite, this function can return a value equal to Precision::Infinite: instead of Standard_Real::LastReal.
Parameters:
  • U1 (float &) –
  • U2 (float &) –
  • V1 (float &) –
  • V2 (float &) –
Return type:

void
Continuity()
  • Returns the Global Continuity of the surface in direction U and V : C0 : only geometric continuity, C1 : continuity of the first derivative all along the surface, C2 : continuity of the second derivative all along the surface, C3 : continuity of the third derivative all along the surface, G1 : tangency continuity all along the surface, G2 : curvature continuity all along the surface, CN : the order of continuity is infinite. Example : If the surface is C1 in the V parametric direction and C2 in the U parametric direction Shape = C1.
Return type:GeomAbs_Shape
D0()
  • Computes the point of parameter U,V on the surface. //! Raised only for an ‘OffsetSurface’ if it is not possible to compute the current point.
Parameters:
Return type:

void
D1()
  • Computes the point P and the first derivatives in the directions U and V at this point. Raised if the continuity of the surface is not C1.
Parameters:
Return type:

void
D2()
  • Computes the point P, the first and the second derivatives in the directions U and V at this point. Raised if the continuity of the surface is not C2.
Parameters:
Return type:

void
D3()
  • Computes the point P, the first,the second and the third derivatives in the directions U and V at this point. Raised if the continuity of the surface is not C2.
Parameters:
Return type:

void
DN()
  • —Purpose ; Computes the derivative of order Nu in the direction U and Nv in the direction V at the point P(U, V). //! Raised if the continuity of the surface is not CNu in the U direction or not CNv in the V direction. Raised if Nu + Nv < 1 or Nu < 0 or Nv < 0.
Parameters:
Return type:

gp_Vec
GetHandle()
IsCNu()
  • Returns the order of continuity of the surface in the U parametric direction. Raised if N < 0.
Parameters:N (int) –
Return type:bool
IsCNv()
  • Returns the order of continuity of the surface in the V parametric direction. Raised if N < 0.
Parameters:N (int) –
Return type:bool
IsUClosed()
  • Checks whether this surface is closed in the u parametric direction. Returns true if, in the u parametric direction: taking uFirst and uLast as the parametric bounds in the u parametric direction, for each parameter v, the distance between the points P(uFirst, v) and P(uLast, v) is less than or equal to gp::Resolution().
Return type:bool
IsUPeriodic()
  • Checks if this surface is periodic in the u parametric direction. Returns true if: - this surface is closed in the u parametric direction, and - there is a constant T such that the distance between the points P (u, v) and P (u + T, v) (or the points P (u, v) and P (u, v + T)) is less than or equal to gp::Resolution(). Note: T is the parametric period in the u parametric direction.
Return type:bool
IsVClosed()
  • Checks whether this surface is closed in the u parametric direction. Returns true if, in the v parametric direction: taking vFirst and vLast as the parametric bounds in the v parametric direction, for each parameter u, the distance between the points P(u, vFirst) and P(u, vLast) is less than or equal to gp::Resolution().
Return type:bool
IsVPeriodic()
  • Checks if this surface is periodic in the v parametric direction. Returns true if: - this surface is closed in the v parametric direction, and - there is a constant T such that the distance between the points P (u, v) and P (u + T, v) (or the points P (u, v) and P (u, v + T)) is less than or equal to gp::Resolution(). Note: T is the parametric period in the v parametric direction.
Return type:bool
ParametricTransformation()
  • Returns a 2d transformation used to find the new parameters of a point on the transformed surface. //! me->Transformed(T)->Value(U’,V’) //! is the same point as //! me->Value(U,V).Transformed(T) //! Where U’,V’ are obtained by transforming U,V with th 2d transformation returned by //! me->ParametricTransformation(T) //! This methods returns an identity transformation //! It can be redefined. For example on the Plane, Cylinder, Cone, Revolved and Extruded surfaces.
Parameters:T (gp_Trsf) –
Return type:gp_GTrsf2d
TransformParameters()
  • Computes the parameters on the transformed surface for the transform of the point of parameters U,V on <self>. //! me->Transformed(T)->Value(U’,V’) //! is the same point as //! me->Value(U,V).Transformed(T) //! Where U’,V’ are the new values of U,V after calling //! me->TranformParameters(U,V,T) //! This methods does not change <U> and <V> //! It can be redefined. For example on the Plane, Cylinder, Cone, Revolved and Extruded surfaces.
Parameters:
  • U (float &) –
  • V (float &) –
  • T (gp_Trsf) –
Return type:

void
UIso()
  • Computes the U isoparametric curve.
Parameters:U (float) –
Return type:Handle_Geom_Curve
UPeriod()
  • Returns the period of this surface in the u parametric direction. raises if the surface is not uperiodic.
Return type:float
UReverse()
  • Reverses the U direction of parametrization of <self>. The bounds of the surface are not modified.
Return type:void
UReversed()
  • Reverses the U direction of parametrization of <self>. The bounds of the surface are not modified. A copy of <self> is returned.
Return type:Handle_Geom_Surface
UReversedParameter()
  • Returns the parameter on the Ureversed surface for the point of parameter U on <self>. //! me->UReversed()->Value(me->UReversedParameter(U),V) //! is the same point as //! me->Value(U,V)
Parameters:U (float) –
Return type:float
VIso()
  • Computes the V isoparametric curve.
Parameters:V (float) –
Return type:Handle_Geom_Curve
VPeriod()
  • Returns the period of this surface in the v parametric direction. raises if the surface is not vperiodic.
Return type:float
VReverse()
  • Reverses the V direction of parametrization of <self>. The bounds of the surface are not modified.
Return type:void
VReversed()
  • Reverses the V direction of parametrization of <self>. The bounds of the surface are not modified. A copy of <self> is returned.
Return type:Handle_Geom_Surface
VReversedParameter()
  • Returns the parameter on the Vreversed surface for the point of parameter V on <self>. //! me->VReversed()->Value(U,me->VReversedParameter(V)) //! is the same point as //! me->Value(U,V)
Parameters:V (float) –
Return type:float
Value()
  • Computes the point of parameter U on the surface. //! It is implemented with D0 //! Raised only for an ‘OffsetSurface’ if it is not possible to compute the current point.
Parameters:
Return type:

gp_Pnt
thisown

The membership flag

class Geom_SurfaceOfLinearExtrusion(*args)

Bases: OCC.Geom.Geom_SweptSurface

  • V is the direction of extrusion. C is the extruded curve. The form of a SurfaceOfLinearExtrusion can be : . ruled surface (RuledForm), . a cylindrical surface if the extruded curve is a circle or a trimmed circle (CylindricalForm), . a plane surface if the extruded curve is a Line (PlanarForm). Warnings : Degenerated surface cases are not detected. For example if the curve C is a line and V is parallel to the direction of this line.
Parameters:
  • C (Handle_Geom_Curve &) –
  • V (gp_Dir) –
Return type:

None
GetHandle()
LocalD0()
  • The following functions evaluates the local derivatives on surface. Useful to manage discontinuities on the surface. if Side = 1 -> P = S( U+,V ) if Side = -1 -> P = S( U-,V ) else P is betveen discontinuities can be evaluated using methods of global evaluations P = S( U ,V )
Parameters:
Return type:

None
LocalD1()
Parameters:
Return type:

None
LocalD2()
Parameters:
Return type:

None
LocalD3()
Parameters:
Return type:

None
LocalDN()
Parameters:
Return type:

gp_Vec
SetBasisCurve()
  • Modifies this surface of linear extrusion by redefining its ‘basis curve’ (the ‘extruded curve’).
Parameters:C (Handle_Geom_Curve &) –
Return type:None
SetDirection()
  • Assigns V as the ‘direction of extrusion’ for this surface of linear extrusion.
Parameters:V (gp_Dir) –
Return type:None
thisown

The membership flag

class Geom_SurfaceOfRevolution(*args)

Bases: OCC.Geom.Geom_SweptSurface

  • C : is the meridian or the referenced curve. A1 is the axis of revolution. The form of a SurfaceOfRevolution can be : . a general revolution surface (RevolutionForm), . a conical surface if the meridian is a line or a trimmed line (ConicalForm), . a cylindrical surface if the meridian is a line or a trimmed line parallel to the revolution axis (CylindricalForm), . a planar surface if the meridian is a line perpendicular to the revolution axis of the surface (PlanarForm). . a spherical surface, . a toroidal surface, . a quadric surface. Warnings : It is not checked that the curve C is planar and that the surface axis is in the plane of the curve. It is not checked that the revolved curve C doesn’t self-intersects.
Parameters:
  • C (Handle_Geom_Curve &) –
  • A1 (gp_Ax1) –
Return type:

None
Axis()
  • Returns the revolution axis of the surface.
Return type:gp_Ax1
GetHandle()
LocalD0()
Parameters:
Return type:

None
LocalD1()
Parameters:
Return type:

None
LocalD2()
Parameters:
Return type:

None
LocalD3()
Parameters:
Return type:

None
LocalDN()
Parameters:
Return type:

gp_Vec
Location()
  • Returns the location point of the axis of revolution.
Return type:gp_Pnt
ReferencePlane()
  • Computes the position of the reference plane of the surface defined by the basis curve and the symmetry axis. The location point is the location point of the revolution’s axis, the XDirection of the plane is given by the revolution’s axis and the orientation of the normal to the plane is given by the sense of revolution. //! Raised if the revolved curve is not planar or if the revolved curve and the symmetry axis are not in the same plane or if the maximum of distance between the axis and the revolved curve is lower or equal to Resolution from gp.
Return type:gp_Ax2
SetAxis()
  • Changes the axis of revolution. Warnings : It is not checked that the axis is in the plane of the revolved curve.
Parameters:A1 (gp_Ax1) –
Return type:None
SetBasisCurve()
  • Changes the revolved curve of the surface. Warnings : It is not checked that the curve C is planar and that the surface axis is in the plane of the curve. It is not checked that the revolved curve C doesn’t self-intersects.
Parameters:C (Handle_Geom_Curve &) –
Return type:None
SetDirection()
  • Changes the direction of the revolution axis. Warnings : It is not checked that the axis is in the plane of the revolved curve.
Parameters:V (gp_Dir) –
Return type:None
SetLocation()
  • Changes the location point of the revolution axis. Warnings : It is not checked that the axis is in the plane of the revolved curve.
Parameters:P (gp_Pnt) –
Return type:None
thisown

The membership flag

class Geom_SweptSurface(*args, **kwargs)

Bases: OCC.Geom.Geom_Surface

BasisCurve()
  • Returns the referenced curve of the surface. For a surface of revolution it is the revolution curve, for a surface of linear extrusion it is the extruded curve.
Return type:Handle_Geom_Curve
Direction()
  • Returns the reference direction of the swept surface. For a surface of revolution it is the direction of the revolution axis, for a surface of linear extrusion it is the direction of extrusion.
Return type:gp_Dir
GetHandle()
thisown

The membership flag

class Geom_ToroidalSurface(*args)

Bases: OCC.Geom.Geom_ElementarySurface

  • A3 is the local coordinate system of the surface. The orientation of increasing V parametric value is defined by the rotation around the main axis (ZAxis) in the trigonometric sense. The parametrization of the surface in the U direction is defined such as the normal Vector (N = D1U ^ D1V) is oriented towards the ‘outside region’ of the surface. Warnings : It is not forbidden to create a toroidal surface with MajorRadius = MinorRadius = 0.0 //! Raised if MinorRadius < 0.0 or if MajorRadius < 0.0
Parameters:
Return type:

None
  • Creates a ToroidalSurface from a non transient Torus from package gp.
Parameters:T (gp_Torus) –
Return type:None
Area()
  • Computes the aera of the surface.
Return type:float
Coefficients()
  • Returns the coefficients of the implicit equation of the surface in the absolute cartesian coordinate system : Coef(1) * X**4 + Coef(2) * Y**4 + Coef(3) * Z**4 + Coef(4) * X**3 * Y + Coef(5) * X**3 * Z + Coef(6) * Y**3 * X + Coef(7) * Y**3 * Z + Coef(8) * Z**3 * X + Coef(9) * Z**3 * Y + Coef(10) * X**2 * Y**2 + Coef(11) * X**2 * Z**2 + Coef(12) * Y**2 * Z**2 + Coef(13) * X**3 + Coef(14) * Y**3 + Coef(15) * Z**3 + Coef(16) * X**2 * Y + Coef(17) * X**2 * Z + Coef(18) * Y**2 * X + Coef(19) * Y**2 * Z + Coef(20) * Z**2 * X + Coef(21) * Z**2 * Y + Coef(22) * X**2 + Coef(23) * Y**2 + Coef(24) * Z**2 + Coef(25) * X * Y + Coef(26) * X * Z + Coef(27) * Y * Z + Coef(28) * X + Coef(29) * Y + Coef(30) * Z + Coef(31) = 0.0 Raised if the length of Coef is lower than 31.
Parameters:Coef (TColStd_Array1OfReal &) –
Return type:None
GetHandle()
MajorRadius()
  • Returns the major radius, or the minor radius, of this torus.
Return type:float
MinorRadius()
  • Returns the major radius, or the minor radius, of this torus.
Return type:float
SetMajorRadius()
  • Modifies this torus by changing its major radius. Exceptions Standard_ConstructionError if: - MajorRadius is negative, or - MajorRadius - r is less than or equal to gp::Resolution(), where r is the minor radius of this torus.
Parameters:MajorRadius (float) –
Return type:None
SetMinorRadius()
  • Modifies this torus by changing its minor radius. Exceptions Standard_ConstructionError if: - MinorRadius is negative, or - R - MinorRadius is less than or equal to gp::Resolution(), where R is the major radius of this torus.
Parameters:MinorRadius (float) –
Return type:None
SetTorus()
  • Converts the gp_Torus torus T into this torus.
Parameters:T (gp_Torus) –
Return type:None
Torus()
  • Returns the non transient torus with the same geometric properties as <self>.
Return type:gp_Torus
Volume()
  • Computes the volume.
Return type:float
thisown

The membership flag

class Geom_Transformation(*args)

Bases: OCC.MMgt.MMgt_TShared

  • Creates an identity transformation.
Return type:None
  • Creates a transient copy of T.
Parameters:T (gp_Trsf) –
Return type:None
Copy()
  • Creates a new object which is a copy of this transformation.
Return type:Handle_Geom_Transformation
Form()
  • Returns the nature of this transformation as a value of the gp_TrsfForm enumeration.
Return type:gp_TrsfForm
GetHandle()
Invert()
  • Raised if the the transformation is singular. This means that the ScaleFactor is lower or equal to Resolution from package gp.
Return type:None
Inverted()
  • Raised if the the transformation is singular. This means that the ScaleFactor is lower or equal to Resolution from package gp.
Return type:Handle_Geom_Transformation
IsNegative()
  • Checks whether this transformation is an indirect transformation: returns true if the determinant of the matrix of the vectorial part of the transformation is less than 0.
Return type:bool
Multiplied()
  • Computes the transformation composed with Other and <self>. <self> * Other. Returns a new transformation
Parameters:Other (Handle_Geom_Transformation &) –
Return type:Handle_Geom_Transformation
Multiply()
  • Computes the transformation composed with Other and <self> . <self> = <self> * Other.
Parameters:Other (Handle_Geom_Transformation &) –
Return type:None
Power()
  • Computes the following composition of transformations if N > 0 <self> * <self> * …….* <self>. if N = 0 Identity if N < 0 <self>.Invert() * ………* <self>.Invert() //! Raised if N < 0 and if the transformation is not inversible
Parameters:N (int) –
Return type:None
Powered()
  • Raised if N < 0 and if the transformation is not inversible
Parameters:N (int) –
Return type:Handle_Geom_Transformation
PreMultiply()
  • Computes the matrix of the transformation composed with <self> and Other. <self> = Other * <self>
Parameters:Other (Handle_Geom_Transformation &) –
Return type:None
ScaleFactor()
  • Returns the scale value of the transformation.
Return type:float
SetMirror()
  • Makes the transformation into a symmetrical transformation with respect to a point P. P is the center of the symmetry.
Parameters:P (gp_Pnt) –
Return type:None
  • Makes the transformation into a symmetrical transformation with respect to an axis A1. A1 is the center of the axial symmetry.
Parameters:A1 (gp_Ax1) –
Return type:None
  • Makes the transformation into a symmetrical transformation with respect to a plane. The plane of the symmetry is defined with the axis placement A2. It is the plane (Location, XDirection, YDirection).
Parameters:A2 (gp_Ax2) –
Return type:None
SetRotation()
  • Makes the transformation into a rotation. A1 is the axis rotation and Ang is the angular value of the rotation in radians.
Parameters:
Return type:

None
SetScale()
  • Makes the transformation into a scale. P is the center of the scale and S is the scaling value.
Parameters:
Return type:

None
SetTransformation()
  • Makes a transformation allowing passage from the coordinate system ‘FromSystem1’ to the coordinate system ‘ToSystem2’. Example : In a C++ implementation : Real x1, y1, z1; // are the coordinates of a point in the // local system FromSystem1 Real x2, y2, z2; // are the coordinates of a point in the // local system ToSystem2 gp_Pnt P1 (x1, y1, z1) Geom_Transformation T; T.SetTransformation (FromSystem1, ToSystem2); gp_Pnt P2 = P1.Transformed (T); P2.Coord (x2, y2, z2);
Parameters:
Return type:

None
  • Makes the transformation allowing passage from the basic coordinate system {P(0.,0.,0.), VX (1.,0.,0.), VY (0.,1.,0.), VZ (0., 0. ,1.) } to the local coordinate system defined with the Ax2 ToSystem. Same utilisation as the previous method. FromSystem1 is defaulted to the absolute coordinate system.
Parameters:ToSystem (gp_Ax3) –
Return type:None
SetTranslation()
  • Makes the transformation into a translation. V is the vector of the translation.
Parameters:V (gp_Vec) –
Return type:None
  • Makes the transformation into a translation from the point P1 to the point P2.
Parameters:
Return type:

None
SetTrsf()
  • Converts the gp_Trsf transformation T into this transformation.
Parameters:T (gp_Trsf) –
Return type:None
Transforms()
  • Applies the transformation <self> to the triplet {X, Y, Z}.
Parameters:
  • X (float &) –
  • Y (float &) –
  • Z (float &) –
Return type:

None
Trsf()
  • Returns a non transient copy of <self>.
Return type:gp_Trsf
Value()
  • Returns the coefficients of the global matrix of tranformation. It is a 3 rows X 4 columns matrix. //! Raised if Row < 1 or Row > 3 or Col < 1 or Col > 4 //! Computes the reverse transformation.
Parameters:
Return type:

float
thisown

The membership flag

class Geom_TrimmedCurve(*args)

Bases: OCC.Geom.Geom_BoundedCurve

  • Constructs a trimmed curve from the basis curve C which is limited between parameter values U1 and U2. Note: - U1 can be greater or less than U2; in both cases, the returned curve is oriented from U1 to U2. - If the basis curve C is periodic, there is an ambiguity because two parts are available. In this case, the trimmed curve has the same orientation as the basis curve if Sense is true (default value) or the opposite orientation if Sense is false. - If the curve is closed but not periodic, it is not possible to keep the part of the curve which includes the junction point (except if the junction point is at the beginning or at the end of the trimmed curve). If you tried to do this, you could alter the fundamental characteristics of the basis curve, which are used, for example, to compute the derivatives of the trimmed curve. The rules for a closed curve are therefore the same as those for an open curve. Warning: The trimmed curve is built from a copy of curve C. Therefore, when C is modified, the trimmed curve is not modified. - If the basis curve is periodic and theAdjustPeriodic is True, the bounds of the trimmed curve may be different from U1 and U2 if the parametric origin of the basis curve is within the arc of the trimmed curve. In this case, the modified parameter will be equal to U1 or U2 plus or minus the period. When theAdjustPeriodic is False, parameters U1 and U2 will be the same, without adjustment into the first period. Exceptions Standard_ConstructionError if: - C is not periodic and U1 or U2 is outside the bounds of C, or - U1 is equal to U2.
Parameters:
  • C (Handle_Geom_Curve &) –
  • U1 (float) –
  • U2 (float) –
  • Sense (bool) – default value is Standard_True
  • theAdjustPeriodic (bool) – default value is Standard_True
Return type:

None
BasisCurve()
  • Returns the basis curve. Warning This function does not return a constant reference. Consequently, any modification of the returned value directly modifies the trimmed curve.
Return type:Handle_Geom_Curve
GetHandle()
SetTrim()
  • Changes this trimmed curve, by redefining the parameter values U1 and U2 which limit its basis curve. Note: If the basis curve is periodic, the trimmed curve has the same orientation as the basis curve if Sense is true (default value) or the opposite orientation if Sense is false. Warning If the basis curve is periodic and theAdjustPeriodic is True, the bounds of the trimmed curve may be different from U1 and U2 if the parametric origin of the basis curve is within the arc of the trimmed curve. In this case, the modified parameter will be equal to U1 or U2 plus or minus the period. When theAdjustPeriodic is False, parameters U1 and U2 will be the same, without adjustment into the first period. Exceptions Standard_ConstructionError if: - the basis curve is not periodic, and either U1 or U2 are outside the bounds of the basis curve, or - U1 is equal to U2.
Parameters:
  • U1 (float) –
  • U2 (float) –
  • Sense (bool) – default value is Standard_True
  • theAdjustPeriodic (bool) – default value is Standard_True
Return type:

None
thisown

The membership flag

class Geom_Vector(*args, **kwargs)

Bases: OCC.Geom.Geom_Geometry

Angle()
  • Computes the angular value, in radians, between this vector and vector Other. The result is a value between 0 and Pi. Exceptions gp_VectorWithNullMagnitude if: - the magnitude of this vector is less than or equal to gp::Resolution(), or - the magnitude of vector Other is less than or equal to gp::Resolution().
Parameters:Other (Handle_Geom_Vector &) –
Return type:float
AngleWithRef()
  • Computes the angular value, in radians, between this vector and vector Other. The result is a value between -Pi and Pi. The vector VRef defines the positive sense of rotation: the angular value is positive if the cross product this ^ Other has the same orientation as VRef (in relation to the plane defined by this vector and vector Other). Otherwise, it is negative. Exceptions Standard_DomainError if this vector, vector Other and vector VRef are coplanar, except if this vector and vector Other are parallel. gp_VectorWithNullMagnitude if the magnitude of this vector, vector Other or vector VRef is less than or equal to gp::Resolution().
Parameters:
  • Other (Handle_Geom_Vector &) –
  • VRef (Handle_Geom_Vector &) –
Return type:

float
Coord()
  • Returns the coordinates X, Y and Z of this vector.
Parameters:
  • X (float &) –
  • Y (float &) –
  • Z (float &) –
Return type:

None
Cross()
  • Computes the cross product between <self> and <Other>. //! Raised if <self> is a ‘Direction’ and if <self> and <Other> are parallel because it is not possible to build a ‘Direction’ with null length.
Parameters:Other (Handle_Geom_Vector &) –
Return type:void
CrossCross()
  • Computes the triple vector product <self> ^(V1 ^ V2). //! Raised if <self> is a ‘Direction’ and if V1 and V2 are parallel or <self> and (V1 ^ V2) are parallel
Parameters:
  • V1 (Handle_Geom_Vector &) –
  • V2 (Handle_Geom_Vector &) –
Return type:

void
CrossCrossed()
  • Computes the triple vector product <self> ^(V1 ^ V2). //! Raised if <self> is a direction and if V1 and V2 are parallel or <self> and (V1 ^ V2) are parallel
Parameters:
  • V1 (Handle_Geom_Vector &) –
  • V2 (Handle_Geom_Vector &) –
Return type:

Handle_Geom_Vector
Crossed()
  • Computes the cross product between <self> and <Other>. A new direction is returned. //! Raised if <self> is a ‘Direction’ and if the two vectors are parallel because it is not possible to create a ‘Direction’ with null length.
Parameters:Other (Handle_Geom_Vector &) –
Return type:Handle_Geom_Vector
Dot()
  • Computes the scalar product of this vector and vector Other.
Parameters:Other (Handle_Geom_Vector &) –
Return type:float
DotCross()
  • Computes the triple scalar product. Returns me . (V1 ^ V2)
Parameters:
  • V1 (Handle_Geom_Vector &) –
  • V2 (Handle_Geom_Vector &) –
Return type:

float
GetHandle()
Magnitude()
  • Returns the Magnitude of <self>.
Return type:float
Reverse()
  • Reverses the vector <self>.
Return type:None
Reversed()
  • Returns a copy of <self> reversed.
Return type:Handle_Geom_Vector
SquareMagnitude()
  • Returns the square magnitude of <self>.
Return type:float
Vec()
  • Converts this vector into a gp_Vec vector.
Return type:gp_Vec
X()
  • Returns the X coordinate of <self>.
Return type:float
Y()
  • Returns the Y coordinate of <self>.
Return type:float
Z()
  • Returns the Z coordinate of <self>.
Return type:float
thisown

The membership flag

class Geom_VectorWithMagnitude(*args)

Bases: OCC.Geom.Geom_Vector

  • Creates a transient copy of V.
Parameters:V (gp_Vec) –
Return type:None
  • Creates a vector with three cartesian coordinates.
Parameters:
Return type:

None
  • Creates a vector from the point P1 to the point P2. The magnitude of the vector is the distance between P1 and P2
Parameters:
Return type:

None
Add()
  • Adds the Vector Other to <self>.
Parameters:Other (Handle_Geom_Vector &) –
Return type:None
Added()
  • Adds the vector Other to <self>.
Parameters:Other (Handle_Geom_Vector &) –
Return type:Handle_Geom_VectorWithMagnitude
Divide()
  • Divides <self> by a scalar.
Parameters:Scalar (float) –
Return type:None
Divided()
  • Divides <self> by a scalar. A new vector is returned.
Parameters:Scalar (float) –
Return type:Handle_Geom_VectorWithMagnitude
GetHandle()
Multiplied()
  • Computes the product of the vector <self> by a scalar. A new vector is returned.
Parameters:Scalar (float) –
Return type:Handle_Geom_VectorWithMagnitude
Multiply()
  • Computes the product of the vector <self> by a scalar.
Parameters:Scalar (float) –
Return type:None
Normalize()
  • Normalizes <self>. //! Raised if the magnitude of the vector is lower or equal to Resolution from package gp.
Return type:None
Normalized()
  • Returns a copy of <self> Normalized. //! Raised if the magnitude of the vector is lower or equal to Resolution from package gp.
Return type:Handle_Geom_VectorWithMagnitude
SetCoord()
  • Assigns the values X, Y and Z to the coordinates of this vector.
Parameters:
Return type:

None
SetVec()
  • Converts the gp_Vec vector V into this vector.
Parameters:V (gp_Vec) –
Return type:None
SetX()
  • Changes the X coordinate of <self>.
Parameters:X (float) –
Return type:None
SetY()
  • Changes the Y coordinate of <self>
Parameters:Y (float) –
Return type:None
SetZ()
  • Changes the Z coordinate of <self>.
Parameters:Z (float) –
Return type:None
Subtract()
  • Subtracts the Vector Other to <self>.
Parameters:Other (Handle_Geom_Vector &) –
Return type:None
Subtracted()
  • Subtracts the vector Other to <self>. A new vector is returned.
Parameters:Other (Handle_Geom_Vector &) –
Return type:Handle_Geom_VectorWithMagnitude
thisown

The membership flag

class Handle_Geom_Axis1Placement(*args)

Bases: OCC.Geom.Handle_Geom_AxisPlacement

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Axis2Placement(*args)

Bases: OCC.Geom.Handle_Geom_AxisPlacement

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_AxisPlacement(*args)

Bases: OCC.Geom.Handle_Geom_Geometry

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BSplineCurve(*args)

Bases: OCC.Geom.Handle_Geom_BoundedCurve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BSplineSurface(*args)

Bases: OCC.Geom.Handle_Geom_BoundedSurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BezierCurve(*args)

Bases: OCC.Geom.Handle_Geom_BoundedCurve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BezierSurface(*args)

Bases: OCC.Geom.Handle_Geom_BoundedSurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BoundedCurve(*args)

Bases: OCC.Geom.Handle_Geom_Curve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_BoundedSurface(*args)

Bases: OCC.Geom.Handle_Geom_Surface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_CartesianPoint(*args)

Bases: OCC.Geom.Handle_Geom_Point

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Circle(*args)

Bases: OCC.Geom.Handle_Geom_Conic

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Conic(*args)

Bases: OCC.Geom.Handle_Geom_Curve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_ConicalSurface(*args)

Bases: OCC.Geom.Handle_Geom_ElementarySurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Curve(*args)

Bases: OCC.Geom.Handle_Geom_Geometry

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_CylindricalSurface(*args)

Bases: OCC.Geom.Handle_Geom_ElementarySurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Direction(*args)

Bases: OCC.Geom.Handle_Geom_Vector

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_ElementarySurface(*args)

Bases: OCC.Geom.Handle_Geom_Surface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Ellipse(*args)

Bases: OCC.Geom.Handle_Geom_Conic

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Geometry(*args)

Bases: OCC.MMgt.Handle_MMgt_TShared

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_HSequenceOfBSplineSurface(*args)

Bases: OCC.MMgt.Handle_MMgt_TShared

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Hyperbola(*args)

Bases: OCC.Geom.Handle_Geom_Conic

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Line(*args)

Bases: OCC.Geom.Handle_Geom_Curve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_OffsetCurve(*args)

Bases: OCC.Geom.Handle_Geom_Curve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_OffsetSurface(*args)

Bases: OCC.Geom.Handle_Geom_Surface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Parabola(*args)

Bases: OCC.Geom.Handle_Geom_Conic

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Plane(*args)

Bases: OCC.Geom.Handle_Geom_ElementarySurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Point(*args)

Bases: OCC.Geom.Handle_Geom_Geometry

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_RectangularTrimmedSurface(*args)

Bases: OCC.Geom.Handle_Geom_BoundedSurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_SequenceNodeOfSequenceOfBSplineSurface(*args)

Bases: OCC.TCollection.Handle_TCollection_SeqNode

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_SphericalSurface(*args)

Bases: OCC.Geom.Handle_Geom_ElementarySurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Surface(*args)

Bases: OCC.Geom.Handle_Geom_Geometry

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_SurfaceOfLinearExtrusion(*args)

Bases: OCC.Geom.Handle_Geom_SweptSurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_SurfaceOfRevolution(*args)

Bases: OCC.Geom.Handle_Geom_SweptSurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_SweptSurface(*args)

Bases: OCC.Geom.Handle_Geom_Surface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_ToroidalSurface(*args)

Bases: OCC.Geom.Handle_Geom_ElementarySurface

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Transformation(*args)

Bases: OCC.MMgt.Handle_MMgt_TShared

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_TrimmedCurve(*args)

Bases: OCC.Geom.Handle_Geom_BoundedCurve

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_Vector(*args)

Bases: OCC.Geom.Handle_Geom_Geometry

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class Handle_Geom_VectorWithMagnitude(*args)

Bases: OCC.Geom.Handle_Geom_Vector

static DownCast()
GetObject()
IsNull()
Nullify()
thisown

The membership flag

class SwigPyIterator(*args, **kwargs)

Bases: object

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

The membership flag

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

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