Open CASCADE Technology 6.6.0
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:
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#include <GeomPlate_BuildPlateSurface.hxx>

Public Member Functions

 GeomPlate_BuildPlateSurface (const Handle< TColStd_HArray1OfInteger > &NPoints, const Handle< GeomPlate_HArray1OfHCurveOnSurface > &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 (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:

void Init ()
 Resets all constraints

void LoadInitSurface (const Handle< Geom_Surface > &Surf)
 Loads the initial Surface

void Add (const Handle< GeomPlate_CurveConstraint > &Cont)
 Adds the linear constraint cont.

void SetNbBounds (const Standard_Integer NbBounds)
void Add (const Handle< GeomPlate_PointConstraint > &Cont)
 Adds the point constraint cont.

void Perform ()
 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.

Handle_GeomPlate_CurveConstraint CurveConstraint (const Standard_Integer order) const
 returns the CurveConstraints of order order


Handle_GeomPlate_PointConstraint PointConstraint (const Standard_Integer order) const
 returns the PointConstraint of order order


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.

Handle_GeomPlate_Surface 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.

Handle_Geom_Surface SurfInit () const
 Returns the initial surface

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.

Handle_TColGeom2d_HArray1OfCurve Curves2d () const
 Extracts the array of curves on the plate surface which
correspond to the curve constraints set in Add.

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.

Standard_Real G0Error () const
 Returns the max distance betwen the result and the constraints

Standard_Real G1Error () const
 Returns the max angle betwen the result and the constraints

Standard_Real G2Error () const
 Returns the max difference of curvature betwen the result and the constraints


Standard_Real G0Error (const Standard_Integer Index)
 Returns the max distance between the result and the constraint Index

Standard_Real G1Error (const Standard_Integer Index)
 Returns the max angle between the result and the constraint Index

Standard_Real G2Error (const Standard_Integer Index)
 Returns the max difference of curvature between the result and the constraint Index



Detailed Description


Constructor & Destructor Documentation

GeomPlate_BuildPlateSurface::GeomPlate_BuildPlateSurface ( const Handle< TColStd_HArray1OfInteger > &  NPoints,
const Handle< GeomPlate_HArray1OfHCurveOnSurface > &  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 
)
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::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 
)
  • 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

void GeomPlate_BuildPlateSurface::Add ( const Handle< GeomPlate_CurveConstraint > &  Cont)
void GeomPlate_BuildPlateSurface::Add ( const Handle< GeomPlate_PointConstraint > &  Cont)
Handle_GeomPlate_CurveConstraint GeomPlate_BuildPlateSurface::CurveConstraint ( const Standard_Integer  order) const
Handle_TColGeom2d_HArray1OfCurve GeomPlate_BuildPlateSurface::Curves2d ( ) const
void GeomPlate_BuildPlateSurface::Disc2dContour ( const Standard_Integer  nbp,
TColgp_SequenceOfXY Seq2d 
)
void GeomPlate_BuildPlateSurface::Disc3dContour ( const Standard_Integer  nbp,
const Standard_Integer  iordre,
TColgp_SequenceOfXYZ Seq3d 
)
Standard_Real GeomPlate_BuildPlateSurface::G0Error ( ) const
Standard_Real GeomPlate_BuildPlateSurface::G0Error ( const Standard_Integer  Index)
Standard_Real GeomPlate_BuildPlateSurface::G1Error ( ) const
Standard_Real GeomPlate_BuildPlateSurface::G1Error ( const Standard_Integer  Index)
Standard_Real GeomPlate_BuildPlateSurface::G2Error ( ) const
Standard_Real GeomPlate_BuildPlateSurface::G2Error ( const Standard_Integer  Index)
void GeomPlate_BuildPlateSurface::Init ( )
Standard_Boolean GeomPlate_BuildPlateSurface::IsDone ( ) const
void GeomPlate_BuildPlateSurface::LoadInitSurface ( const Handle< Geom_Surface > &  Surf)
Handle_TColStd_HArray1OfInteger GeomPlate_BuildPlateSurface::Order ( ) const
void GeomPlate_BuildPlateSurface::Perform ( )
Handle_GeomPlate_PointConstraint GeomPlate_BuildPlateSurface::PointConstraint ( const Standard_Integer  order) const
Handle_TColStd_HArray1OfInteger GeomPlate_BuildPlateSurface::Sense ( ) const
void GeomPlate_BuildPlateSurface::SetNbBounds ( const Standard_Integer  NbBounds)
Handle_GeomPlate_Surface GeomPlate_BuildPlateSurface::Surface ( ) const
Handle_Geom_Surface GeomPlate_BuildPlateSurface::SurfInit ( ) const

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