// Created on: 1993-07-09
// Created by: Isabelle GRIGNON
// Copyright (c) 1993-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#ifndef _BndLib_Add2dCurve_HeaderFile
#define _BndLib_Add2dCurve_HeaderFile
#include
#include
#include
#include
class Adaptor2d_Curve2d;
class Bnd_Box2d;
class Geom2d_Curve;
//! 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.
class BndLib_Add2dCurve
{
public:
DEFINE_STANDARD_ALLOC
//! 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:
//! - 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.
Standard_EXPORT static void Add (const Adaptor2d_Curve2d& C, 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:
//! - 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.
Standard_EXPORT 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 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:
//! - 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.
Standard_EXPORT static void Add (const Handle(Geom2d_Curve)& C, const Standard_Real Tol, Bnd_Box2d& Box);
//! Adds to the bounding box B the part of curve C
//! B is then enlarged by the tolerance value Tol.
//! U1, U2 - the parametric range to comute the bounding box;
//! 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:
//! - 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.
Standard_EXPORT static void Add (const Handle(Geom2d_Curve)& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol, Bnd_Box2d& B);
//! Adds to the bounding box B the part of curve C
//! B is then enlarged by the tolerance value Tol.
//! U1, U2 - the parametric range to comute the bounding box;
//! Note: depending on the type of curve, one of the following
//! algorithms is used to include it in the bounding box B:
//! - an exact analytical if C is built from a line, a circle or a conic curve,
//! - numerical calculation of bounding box sizes, based on minimization algorithm, for other types of curve
//! If Tol = < Precision::PConfusion(), Precision::PConfusion is used as tolerance for calculation
Standard_EXPORT static void AddOptimal(const Handle(Geom2d_Curve)& C,
const Standard_Real U1,
const Standard_Real U2,
const Standard_Real Tol,
Bnd_Box2d& B);
protected:
private:
};
#endif // _BndLib_Add2dCurve_HeaderFile