Open CASCADE Technology 6.6.0
Static Public Member Functions
BndLib_Add2dCurve Class Reference

Computes the bounding box for a curve in 2d .
Functions to add a 2D curve to a bounding box.
The 2D curve is defined from a Geom2d curve.

#include <BndLib_Add2dCurve.hxx>

Static Public Member Functions

static void Add (const Adaptor2d_Curve2d &C, const Standard_Real Tol, Bnd_Box2d &B)
 Adds to the bounding box B the curve C
B is then enlarged by the tolerance value Tol.
Note: depending on the type of curve, one of the following
representations of the curve C is used to include it in the bounding box B:

static void Add (const Adaptor2d_Curve2d &C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol, Bnd_Box2d &B)
 Adds to the bounding box Bthe arc of the curve C limited by the two parameter
values P1 and P2.
B is then enlarged by the tolerance value Tol.
Note: depending on the type of curve, one of the following
representations of the curve C is used to include it in the bounding box B:


Member Function Documentation

static void BndLib_Add2dCurve::Add ( const Adaptor2d_Curve2d C,
const Standard_Real  Tol,
Bnd_Box2d B 
) [static]
  • an exact representation if C is built from a line, a circle or a conic curve,
  • the poles of the curve if C is built from a Bezier curve or a BSpline curve,
  • if not, the points of an approximation of the curve C.
    Warning
    C is an adapted curve, that is, an object which is an interface between:
  • the services provided by a 2D curve from the package Geom2d
  • and those required of the curve by the computation algorithm.
    The adapted curve is created in the following way:
    Handle(Geom2d_Curve) mycurve = ...
    ;
    Geom2dAdaptor_Curve C(mycurve);
    The bounding box B is then enlarged by adding it:
    Bnd_Box2d B;
    // ...
    Standard_Real Tol = ... ;
    Add2dCurve::Add ( C, Tol, B );
    Exceptions
    Standard_Failure if the curve is built from:
  • a Geom_Line, or
  • a Geom_Parabola, or
  • a Geom_Hyperbola,
    and P1 and P2 are either two negative infinite real
    numbers, or two positive infinite real numbers.
static void BndLib_Add2dCurve::Add ( const Adaptor2d_Curve2d C,
const Standard_Real  U1,
const Standard_Real  U2,
const Standard_Real  Tol,
Bnd_Box2d B 
) [static]
  • an exact representation if C is built from a line, a circle or a conic curve,
  • the poles of the curve if C is built from a Bezier curve or a BSpline curve,
  • if not, the points of an approximation of the curve C.
    Warning
    C is an adapted curve, that is, an object which is an interface between:
  • the services provided by a 2D curve from the package Geom2d
  • and those required of the curve by the computation algorithm.
    The adapted curve is created in the following way:
    Handle(Geom2d_Curve) mycurve = ...
    ;
    Geom2dAdaptor_Curve C(mycurve);
    The bounding box B is then enlarged by adding it:
    Bnd_Box2d B;
    // ...
    Standard_Real Tol = ... ;
    Add2dCurve::Add ( C, Tol, B );
    Exceptions
    Standard_Failure if the curve is built from:
  • a Geom_Line, or
  • a Geom_Parabola, or
  • a Geom_Hyperbola,
    and P1 and P2 are either two negative infinite real
    numbers, or two positive infinite real numbers.

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