OCC.Core.ShapeConstruct module

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

class ShapeConstruct_Curve

Bases: object

AdjustCurve()

• Modifies a curve in order to make its bounds confused with given points. Works only on lines and B-Splines, returns True in this case, else returns False. For line considers both bounding points, for B-Splines only specified. //! WarningDoes not check if curve should be reversed

  param C3D

  type C3D

  Geom_Curve

  param P1

  type P1

  gp_Pnt

  param P2

  type P2

  gp_Pnt

  param take1

  default value is Standard_True

  type take1

  bool

  param take2

  default value is Standard_True

  type take2

  bool

  rtype

  bool

AdjustCurve2d()

• Modifies a curve in order to make its bounds confused with given points. Works only on lines and B-Splines, returns True in this case, else returns False. //! For line considers both bounding points, for B-Splines only specified. //! WarningDoes not check if curve should be reversed

  param C2D

  type C2D

  Geom2d_Curve

  param P1

  type P1

  gp_Pnt2d

  param P2

  type P2

  gp_Pnt2d

  param take1

  default value is Standard_True

  type take1

  bool

  param take2

  default value is Standard_True

  type take2

  bool

  rtype

  bool

AdjustCurveSegment()

• Modifies a curve in order to make its bounds confused with given points. Works only on lines and B-Splines. //! For lines works as previous method, B-Splines are segmented at the given values and then are adjusted to the points.

  param C3D

  type C3D

  Geom_Curve

  param P1

  type P1

  gp_Pnt

  param P2

  type P2

  gp_Pnt

  param U1

  type U1

  float

  param U2

  type U2

  float

  rtype

  bool

ConvertToBSpline()

• Converts a curve of any type (only part from first to last) to bspline. The method of conversion depends on the type of original curve: BSpline -> C.Segment(first,last) Bezier and Line -> GeomConvert::CurveToBSplineCurve(C).Segment(first,last) Conic and Other -> Approx_Curve3d(C[first,last],prec,C1,9,1000)

  param C

  type C

  Geom_Curve

  param first

  type first

  float

  param last

  type last

  float

  param prec

  type prec

  float

  rtype

  opencascade::handle<Geom_BSplineCurve>* Converts a curve of any type (only part from first to last) to bspline. The method of conversion depends on the type of original curve: BSpline -> C.Segment(first,last) Bezier and Line -> GeomConvert::CurveToBSplineCurve(C).Segment(first,last) Conic and Other -> Approx_Curve2d(C[first,last],prec,C1,9,1000)

  param C

  type C

  Geom2d_Curve

  param first

  type first

  float

  param last

  type last

  float

  param prec

  type prec

  float

  rtype

  opencascade::handle<Geom2d_BSplineCurve>

static FixKnots()

Parameters

knots –

type knots

TColStd_HArray1OfReal

rtype

bool* Fix bspline knots to ensure that there is enough gap between neighbouring values Returns True if something fixed (by shifting knot)

param knots

type knots

TColStd_Array1OfReal

rtype

bool

property thisown

The membership flag

class ShapeConstruct_MakeTriangulation(*args)

Bases: OCC.Core.BRepBuilderAPI.BRepBuilderAPI_MakeShape

Parameters

pnts –

type pnts

TColgp_Array1OfPnt

param prec

default value is 0.0

type prec

float

rtype

None:param wire:

type wire

TopoDS_Wire

param prec

default value is 0.0

type prec

float

rtype

None

property thisown

The membership flag

class ShapeConstruct_ProjectCurveOnSurface(*args)

Bases: OCC.Core.Standard.Standard_Transient

• Empty constructor.

  rtype

  None

static DownCast(t)

GetAdjustOverDegenMode(ShapeConstruct_ProjectCurveOnSurface self) → Standard_Integer

GetBuildCurveMode(ShapeConstruct_ProjectCurveOnSurface self) → Standard_Boolean

Init()

• Initializes the object with all necessary parameters, i.e. surface and precision

  param surf

  type surf

  Geom_Surface

  param preci

  type preci

  float

  rtype

  void* Initializes the object with all necessary parameters, i.e. surface and precision

  param surf

  type surf

  ShapeAnalysis_Surface

  param preci

  type preci

  float

  rtype

  void

Perform()

• Computes the projection of 3d curve onto a surface using the specialized algorithm. Returns False if projector fails, otherwise, if pcurve computed successfully, returns True. The output curve 2D is guaranteed to be same-parameter with input curve 3D on the interval [First, Last]. If the output curve lies on a direct line the infinite line is returned, in the case same-parameter condition is satisfied. TolFirst and TolLast are the tolerances at the ends of input curve 3D.

  param c3d

  type c3d

  Geom_Curve

  param First

  type First

  float

  param Last

  type Last

  float

  param c2d

  type c2d

  Geom2d_Curve

  param TolFirst

  default value is -1

  type TolFirst

  float

  param TolLast

  default value is -1

  type TolLast

  float

  rtype

  bool

PerformByProjLib()

• Computes the projection of 3d curve onto a surface using the standard algorithm from ProjLib. Returns False if standard projector fails or raises an exception or cuts the curve by parametrical bounds of the surface. Else, if pcurve computed successfully, returns True. The continuity, maxdeg and nbinterval are parameters of call to Approx_CurveOnSurface. If nbinterval is equal to -1 (default), this value is computed depending on source 3d curve and surface.

  param c3d

  type c3d

  Geom_Curve

  param First

  type First

  float

  param Last

  type Last

  float

  param c2d

  type c2d

  Geom2d_Curve

  param continuity

  default value is GeomAbs_C1

  type continuity

  GeomAbs_Shape

  param maxdeg

  default value is 12

  type maxdeg

  int

  param nbinterval

  default value is -1

  type nbinterval

  int

  rtype

  bool

SetAdjustOverDegenMode(ShapeConstruct_ProjectCurveOnSurface self, Standard_Integer value)

SetBuildCurveMode(ShapeConstruct_ProjectCurveOnSurface self, Standard_Boolean value)

SetPrecision()

• Sets value for current precision

  param preci

  type preci

  float

  rtype

  None

SetSurface()

• Loads a surface (in the form of Geom_Surface) to project on

  param surf

  type surf

  Geom_Surface

  rtype

  None* Loads a surface (in the form of ShapeAnalysis_Surface) to project on

  param surf

  type surf

  ShapeAnalysis_Surface

  rtype

  None

Status()

• Returns the status of last Peform

  param theStatus

  type theStatus

  ShapeExtend_Status

  rtype

  bool

property thisown

The membership flag

class SwigPyIterator(*args, **kwargs)

Bases: object

advance()

copy()

decr()

distance()

equal()

incr()

next()

previous()

property thisown

The membership flag

value()

class shapeconstruct

Bases: object

static ConvertCurveToBSpline()

• Tool for wire triangulation

  param C3D

  type C3D

  Geom_Curve

  param First

  type First

  float

  param Last

  type Last

  float

  param Tol3d

  type Tol3d

  float

  param Continuity

  type Continuity

  GeomAbs_Shape

  param MaxSegments

  type MaxSegments

  int

  param MaxDegree

  type MaxDegree

  int

  rtype

  opencascade::handle<Geom_BSplineCurve>:param C2D:

  type C2D

  Geom2d_Curve

  param First

  type First

  float

  param Last

  type Last

  float

  param Tol2d

  type Tol2d

  float

  param Continuity

  type Continuity

  GeomAbs_Shape

  param MaxSegments

  type MaxSegments

  int

  param MaxDegree

  type MaxDegree

  int

  rtype

  opencascade::handle<Geom2d_BSplineCurve>

static ConvertSurfaceToBSpline()

Parameters

surf –

type surf

Geom_Surface

param UF

type UF

float

param UL

type UL

float

param VF

type VF

float

param VL

type VL

float

param Tol3d

type Tol3d

float

param Continuity

type Continuity

GeomAbs_Shape

param MaxSegments

type MaxSegments

int

param MaxDegree

type MaxDegree

int

rtype

opencascade::handle<Geom_BSplineSurface>

static JoinCurves()

• Method for joininig curves 3D. Parametersc3d1,ac3d2 - initial curves Orient1, Orient2 - initial edges orientations. first1,last1,first2,last2 - parameters for trimming curves (re-calculate with account of orientation edges) c3dOut - result curve isRev1,isRev2 - out parameters indicative on possible errors. Return valueTrue - if curves were joined successfully, else - False.

  param c3d1

  type c3d1

  Geom_Curve

  param ac3d2

  type ac3d2

  Geom_Curve

  param Orient1

  type Orient1

  TopAbs_Orientation

  param Orient2

  type Orient2

  TopAbs_Orientation

  param first1

  type first1

  float

  param last1

  type last1

  float

  param first2

  type first2

  float

  param last2

  type last2

  float

  param c3dOut

  type c3dOut

  Geom_Curve

  param isRev1

  type isRev1

  bool

  param isRev2

  type isRev2

  bool

  rtype

  bool* Method for joininig curves 3D. Parameters : c3d1,ac3d2 - initial curves Orient1, Orient2 - initial edges orientations. first1,last1,first2,last2 - parameters for trimming curves (re-calculate with account of orientation edges) c3dOut - result curve isRev1,isRev2 - out parameters indicative on possible errors. isError - input parameter indicative possible errors due to that one from edges have one vertex Return value : True - if curves were joined successfully, else - False.

  param c2d1

  type c2d1

  Geom2d_Curve

  param ac2d2

  type ac2d2

  Geom2d_Curve

  param Orient1

  type Orient1

  TopAbs_Orientation

  param Orient2

  type Orient2

  TopAbs_Orientation

  param first1

  type first1

  float

  param last1

  type last1

  float

  param first2

  type first2

  float

  param last2

  type last2

  float

  param c2dOut

  type c2dOut

  Geom2d_Curve

  param isRev1

  type isRev1

  bool

  param isRev2

  type isRev2

  bool

  param isError

  default value is Standard_False

  type isError

  bool

  rtype

  bool

static JoinPCurves()

• join pcurves of the <theEdge> on the <theFace> try to use pcurves from originas edges <theEdges> Returns false if cannot join pcurves

  param theEdges

  type theEdges

  TopTools_HSequenceOfShape

  param theFace

  type theFace

  TopoDS_Face

  param theEdge

  type theEdge

  TopoDS_Edge

  rtype

  bool

property thisown

The membership flag