Open CASCADE Technology  7.4.1.dev
Public Member Functions
GeomPlate_BuildPlateSurface Class Reference

This class provides an algorithm for constructing such a plate surface that it conforms to given curve and/or point constraints. The algorithm accepts or constructs an initial surface and looks for a deformation of it satisfying the constraints and minimizing energy input. A BuildPlateSurface object provides a framework for: More...

#include <GeomPlate_BuildPlateSurface.hxx>

Public Member Functions

 GeomPlate_BuildPlateSurface (const Handle< TColStd_HArray1OfInteger > &NPoints, const Handle< GeomPlate_HArray1OfHCurve > &TabCurve, const Handle< TColStd_HArray1OfInteger > &Tang, const Standard_Integer Degree, const Standard_Integer NbIter=3, const Standard_Real Tol2d=0.00001, const Standard_Real Tol3d=0.0001, const Standard_Real TolAng=0.01, const Standard_Real TolCurv=0.1, const Standard_Boolean Anisotropie=Standard_False)
 Constructor compatible with the old version with this constructor the constraint are given in a Array of Curve on Surface The array NbPoints contains the number of points for each constraint. The Array Tang contains the order of constraint for each Constraint: The possible values for this order has to be -1 , 0 , 1 , 2 . Order i means constraint Gi. NbIter is the maximum number of iteration to optimise the number of points for resolution Degree is the degree of resolution for Plate Tol2d is the tolerance used to test if two points of different constraint are identical in the parametric space of the initial surface Tol3d is used to test if two identical points in the 2d space are identical in 3d space TolAng is used to compare the angle between normal of two identical points in the 2d space Raises ConstructionError;. More...
 
 GeomPlate_BuildPlateSurface (const Handle< Geom_Surface > &Surf, const Standard_Integer Degree=3, const Standard_Integer NbPtsOnCur=10, const Standard_Integer NbIter=3, const Standard_Real Tol2d=0.00001, const Standard_Real Tol3d=0.0001, const Standard_Real TolAng=0.01, const Standard_Real TolCurv=0.1, const Standard_Boolean Anisotropie=Standard_False)
 
 GeomPlate_BuildPlateSurface (const Standard_Integer Degree=3, const Standard_Integer NbPtsOnCur=10, const Standard_Integer NbIter=3, const Standard_Real Tol2d=0.00001, const Standard_Real Tol3d=0.0001, const Standard_Real TolAng=0.01, const Standard_Real TolCurv=0.1, const Standard_Boolean Anisotropie=Standard_False)
 Initializes the BuildPlateSurface framework for deforming plate surfaces using curve and point constraints. You use the first constructor if you have an initial surface to work with at construction time. If not, you use the second. You can add one later by using the method LoadInitSurface. If no initial surface is loaded, one will automatically be computed. The curve and point constraints will be defined by using the method Add. Before the call to the algorithm, the curve constraints will be transformed into sequences of discrete points. Each curve defined as a constraint will be given the value of NbPtsOnCur as the average number of points on it. Several arguments serve to improve performance of the algorithm. NbIter, for example, expresses the number of iterations allowed and is used to control the duration of computation. To optimize resolution, Degree will have the default value of 3. The surface generated must respect several tolerance values: More...
 
void Init ()
 Resets all constraints. More...
 
void LoadInitSurface (const Handle< Geom_Surface > &Surf)
 Loads the initial Surface. More...
 
void Add (const Handle< GeomPlate_CurveConstraint > &Cont)
 Adds the linear constraint cont. More...
 
void SetNbBounds (const Standard_Integer NbBounds)
 
void Add (const Handle< GeomPlate_PointConstraint > &Cont)
 Adds the point constraint cont. More...
 
void Perform (const Handle< Message_ProgressIndicator > &aProgress=Handle< Message_ProgressIndicator >())
 Calls the algorithm and computes the plate surface using the loaded constraints. If no initial surface is given, the algorithm automatically computes one. Exceptions Standard_RangeError if the value of the constraint is null or if plate is not done. More...
 
Handle< GeomPlate_CurveConstraintCurveConstraint (const Standard_Integer order) const
 returns the CurveConstraints of order order More...
 
Handle< GeomPlate_PointConstraintPointConstraint (const Standard_Integer order) const
 returns the PointConstraint of order order More...
 
void Disc2dContour (const Standard_Integer nbp, TColgp_SequenceOfXY &Seq2d)
 
void Disc3dContour (const Standard_Integer nbp, const Standard_Integer iordre, TColgp_SequenceOfXYZ &Seq3d)
 
Standard_Boolean IsDone () const
 Tests whether computation of the plate has been completed. More...
 
Handle< GeomPlate_SurfaceSurface () const
 Returns the result of the computation. This surface can then be used by GeomPlate_MakeApprox for converting the resulting surface into a BSpline. More...
 
Handle< Geom_SurfaceSurfInit () const
 Returns the initial surface. More...
 
Handle< TColStd_HArray1OfInteger > Sense () const
 Allows you to ensure that the array of curves returned by Curves2d has the correct orientation. Returns the orientation of the curves in the the array returned by Curves2d. Computation changes the orientation of these curves. Consequently, this method returns the orientation prior to computation. More...
 
Handle< TColGeom2d_HArray1OfCurve > Curves2d () const
 Extracts the array of curves on the plate surface which correspond to the curve constraints set in Add. More...
 
Handle< TColStd_HArray1OfInteger > Order () const
 Returns the order of the curves in the array returned by Curves2d. Computation changes this order. Consequently, this method returns the order of the curves prior to computation. More...
 
Standard_Real G0Error () const
 Returns the max distance betwen the result and the constraints. More...
 
Standard_Real G1Error () const
 Returns the max angle betwen the result and the constraints. More...
 
Standard_Real G2Error () const
 Returns the max difference of curvature betwen the result and the constraints. More...
 
Standard_Real G0Error (const Standard_Integer Index)
 Returns the max distance between the result and the constraint Index. More...
 
Standard_Real G1Error (const Standard_Integer Index)
 Returns the max angle between the result and the constraint Index. More...
 
Standard_Real G2Error (const Standard_Integer Index)
 Returns the max difference of curvature between the result and the constraint Index. More...
 

Detailed Description

This class provides an algorithm for constructing such a plate surface that it conforms to given curve and/or point constraints. The algorithm accepts or constructs an initial surface and looks for a deformation of it satisfying the constraints and minimizing energy input. A BuildPlateSurface object provides a framework for:

Constructor & Destructor Documentation

◆ GeomPlate_BuildPlateSurface() [1/3]

GeomPlate_BuildPlateSurface::GeomPlate_BuildPlateSurface ( const Handle< TColStd_HArray1OfInteger > &  NPoints,
const Handle< GeomPlate_HArray1OfHCurve > &  TabCurve,
const Handle< TColStd_HArray1OfInteger > &  Tang,
const Standard_Integer  Degree,
const Standard_Integer  NbIter = 3,
const Standard_Real  Tol2d = 0.00001,
const Standard_Real  Tol3d = 0.0001,
const Standard_Real  TolAng = 0.01,
const Standard_Real  TolCurv = 0.1,
const Standard_Boolean  Anisotropie = Standard_False 
)

Constructor compatible with the old version with this constructor the constraint are given in a Array of Curve on Surface The array NbPoints contains the number of points for each constraint. The Array Tang contains the order of constraint for each Constraint: The possible values for this order has to be -1 , 0 , 1 , 2 . Order i means constraint Gi. NbIter is the maximum number of iteration to optimise the number of points for resolution Degree is the degree of resolution for Plate Tol2d is the tolerance used to test if two points of different constraint are identical in the parametric space of the initial surface Tol3d is used to test if two identical points in the 2d space are identical in 3d space TolAng is used to compare the angle between normal of two identical points in the 2d space Raises ConstructionError;.

◆ GeomPlate_BuildPlateSurface() [2/3]

GeomPlate_BuildPlateSurface::GeomPlate_BuildPlateSurface ( const Handle< Geom_Surface > &  Surf,
const Standard_Integer  Degree = 3,
const Standard_Integer  NbPtsOnCur = 10,
const Standard_Integer  NbIter = 3,
const Standard_Real  Tol2d = 0.00001,
const Standard_Real  Tol3d = 0.0001,
const Standard_Real  TolAng = 0.01,
const Standard_Real  TolCurv = 0.1,
const Standard_Boolean  Anisotropie = Standard_False 
)

◆ GeomPlate_BuildPlateSurface() [3/3]

GeomPlate_BuildPlateSurface::GeomPlate_BuildPlateSurface ( const Standard_Integer  Degree = 3,
const Standard_Integer  NbPtsOnCur = 10,
const Standard_Integer  NbIter = 3,
const Standard_Real  Tol2d = 0.00001,
const Standard_Real  Tol3d = 0.0001,
const Standard_Real  TolAng = 0.01,
const Standard_Real  TolCurv = 0.1,
const Standard_Boolean  Anisotropie = Standard_False 
)

Initializes the BuildPlateSurface framework for deforming plate surfaces using curve and point constraints. You use the first constructor if you have an initial surface to work with at construction time. If not, you use the second. You can add one later by using the method LoadInitSurface. If no initial surface is loaded, one will automatically be computed. The curve and point constraints will be defined by using the method Add. Before the call to the algorithm, the curve constraints will be transformed into sequences of discrete points. Each curve defined as a constraint will be given the value of NbPtsOnCur as the average number of points on it. Several arguments serve to improve performance of the algorithm. NbIter, for example, expresses the number of iterations allowed and is used to control the duration of computation. To optimize resolution, Degree will have the default value of 3. The surface generated must respect several tolerance values:

  • 2d tolerance given by Tol2d, with a default value of 0.00001
  • 3d tolerance expressed by Tol3d, with a default value of 0.0001
  • angular tolerance given by TolAng, with a default value of 0.01, defining the greatest angle allowed between the constraint and the target surface. Exceptions Standard_ConstructionError if NbIter is less than 1 or Degree is less than 3.

Member Function Documentation

◆ Add() [1/2]

void GeomPlate_BuildPlateSurface::Add ( const Handle< GeomPlate_CurveConstraint > &  Cont)

Adds the linear constraint cont.

◆ Add() [2/2]

void GeomPlate_BuildPlateSurface::Add ( const Handle< GeomPlate_PointConstraint > &  Cont)

Adds the point constraint cont.

◆ CurveConstraint()

Handle< GeomPlate_CurveConstraint > GeomPlate_BuildPlateSurface::CurveConstraint ( const Standard_Integer  order) const

returns the CurveConstraints of order order

◆ Curves2d()

Handle< TColGeom2d_HArray1OfCurve > GeomPlate_BuildPlateSurface::Curves2d ( ) const

Extracts the array of curves on the plate surface which correspond to the curve constraints set in Add.

◆ Disc2dContour()

void GeomPlate_BuildPlateSurface::Disc2dContour ( const Standard_Integer  nbp,
TColgp_SequenceOfXY Seq2d 
)

◆ Disc3dContour()

void GeomPlate_BuildPlateSurface::Disc3dContour ( const Standard_Integer  nbp,
const Standard_Integer  iordre,
TColgp_SequenceOfXYZ Seq3d 
)

◆ G0Error() [1/2]

Standard_Real GeomPlate_BuildPlateSurface::G0Error ( ) const

Returns the max distance betwen the result and the constraints.

◆ G0Error() [2/2]

Standard_Real GeomPlate_BuildPlateSurface::G0Error ( const Standard_Integer  Index)

Returns the max distance between the result and the constraint Index.

◆ G1Error() [1/2]

Standard_Real GeomPlate_BuildPlateSurface::G1Error ( ) const

Returns the max angle betwen the result and the constraints.

◆ G1Error() [2/2]

Standard_Real GeomPlate_BuildPlateSurface::G1Error ( const Standard_Integer  Index)

Returns the max angle between the result and the constraint Index.

◆ G2Error() [1/2]

Standard_Real GeomPlate_BuildPlateSurface::G2Error ( ) const

Returns the max difference of curvature betwen the result and the constraints.

◆ G2Error() [2/2]

Standard_Real GeomPlate_BuildPlateSurface::G2Error ( const Standard_Integer  Index)

Returns the max difference of curvature between the result and the constraint Index.

◆ Init()

void GeomPlate_BuildPlateSurface::Init ( )

Resets all constraints.

◆ IsDone()

Standard_Boolean GeomPlate_BuildPlateSurface::IsDone ( ) const

Tests whether computation of the plate has been completed.

◆ LoadInitSurface()

void GeomPlate_BuildPlateSurface::LoadInitSurface ( const Handle< Geom_Surface > &  Surf)

Loads the initial Surface.

◆ Order()

Handle< TColStd_HArray1OfInteger > GeomPlate_BuildPlateSurface::Order ( ) const

Returns the order of the curves in the array returned by Curves2d. Computation changes this order. Consequently, this method returns the order of the curves prior to computation.

◆ Perform()

void GeomPlate_BuildPlateSurface::Perform ( const Handle< Message_ProgressIndicator > &  aProgress = HandleMessage_ProgressIndicator >())

Calls the algorithm and computes the plate surface using the loaded constraints. If no initial surface is given, the algorithm automatically computes one. Exceptions Standard_RangeError if the value of the constraint is null or if plate is not done.

◆ PointConstraint()

Handle< GeomPlate_PointConstraint > GeomPlate_BuildPlateSurface::PointConstraint ( const Standard_Integer  order) const

returns the PointConstraint of order order

◆ Sense()

Handle< TColStd_HArray1OfInteger > GeomPlate_BuildPlateSurface::Sense ( ) const

Allows you to ensure that the array of curves returned by Curves2d has the correct orientation. Returns the orientation of the curves in the the array returned by Curves2d. Computation changes the orientation of these curves. Consequently, this method returns the orientation prior to computation.

◆ SetNbBounds()

void GeomPlate_BuildPlateSurface::SetNbBounds ( const Standard_Integer  NbBounds)

◆ Surface()

Handle< GeomPlate_Surface > GeomPlate_BuildPlateSurface::Surface ( ) const

Returns the result of the computation. This surface can then be used by GeomPlate_MakeApprox for converting the resulting surface into a BSpline.

◆ SurfInit()

Handle< Geom_Surface > GeomPlate_BuildPlateSurface::SurfInit ( ) const

Returns the initial surface.


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