146 lines
6.8 KiB
C++
146 lines
6.8 KiB
C++
// Created on: 1993-07-09
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// Created by: Isabelle GRIGNON
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// Copyright (c) 1993-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _BndLib_Add2dCurve_HeaderFile
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#define _BndLib_Add2dCurve_HeaderFile
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#include "Standard.hxx"
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#include "Standard_DefineAlloc.hxx"
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#include "Standard_Handle.hxx"
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class Adaptor2d_Curve2d;
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class Bnd_Box2d;
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class Geom2d_Curve;
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//! Computes the bounding box for a curve in 2d .
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//! Functions to add a 2D curve to a bounding box.
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//! The 2D curve is defined from a Geom2d curve.
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class BndLib_Add2dCurve
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Adds to the bounding box B the curve C
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//! B is then enlarged by the tolerance value Tol.
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//! Note: depending on the type of curve, one of the following
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//! representations of the curve C is used to include it in the bounding box B:
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//! - an exact representation if C is built from a line, a circle or a conic curve,
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//! - the poles of the curve if C is built from a Bezier curve or a BSpline curve,
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//! - if not, the points of an approximation of the curve C.
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//! Warning
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//! C is an adapted curve, that is, an object which is an interface between:
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//! - the services provided by a 2D curve from the package Geom2d
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//! - and those required of the curve by the computation algorithm.
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//! The adapted curve is created in the following way:
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//! Handle(Geom2d_Curve) mycurve = ...
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//! ;
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//! Geom2dAdaptor_Curve C(mycurve);
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//! The bounding box B is then enlarged by adding it:
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//! Bnd_Box2d B;
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//! // ...
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//! Standard_Real Tol = ... ;
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//! Add2dCurve::Add ( C, Tol, B );
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//! Exceptions
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//! Standard_Failure if the curve is built from:
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//! - a Geom_Line, or
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//! - a Geom_Parabola, or
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//! - a Geom_Hyperbola,
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//! and P1 and P2 are either two negative infinite real
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//! numbers, or two positive infinite real numbers.
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Standard_EXPORT static void Add(const Adaptor2d_Curve2d& C,
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const Standard_Real Tol,
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Bnd_Box2d& B);
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//! Adds to the bounding box Bthe arc of the curve C limited by the two parameter
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//! values P1 and P2.
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//! B is then enlarged by the tolerance value Tol.
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//! Note: depending on the type of curve, one of the following
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//! representations of the curve C is used to include it in the bounding box B:
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//! - an exact representation if C is built from a line, a circle or a conic curve,
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//! - the poles of the curve if C is built from a Bezier curve or a BSpline curve,
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//! - if not, the points of an approximation of the curve C.
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//! Warning
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//! C is an adapted curve, that is, an object which is an interface between:
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//! - the services provided by a 2D curve from the package Geom2d
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//! - and those required of the curve by the computation algorithm.
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//! The adapted curve is created in the following way:
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//! Handle(Geom2d_Curve) mycurve = ...
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//! ;
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//! Geom2dAdaptor_Curve C(mycurve);
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//! The bounding box B is then enlarged by adding it:
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//! Bnd_Box2d B;
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//! // ...
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//! Standard_Real Tol = ... ;
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//! Add2dCurve::Add ( C, Tol, B );
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//! Exceptions
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//! Standard_Failure if the curve is built from:
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//! - a Geom_Line, or
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//! - a Geom_Parabola, or
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//! - a Geom_Hyperbola,
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//! and P1 and P2 are either two negative infinite real
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//! numbers, or two positive infinite real numbers.
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Standard_EXPORT static void Add(const Adaptor2d_Curve2d& C,
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const Standard_Real U1,
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const Standard_Real U2,
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const Standard_Real Tol,
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Bnd_Box2d& B);
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//! Adds to the bounding box B the curve C
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//! B is then enlarged by the tolerance value Tol.
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//! Note: depending on the type of curve, one of the following
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//! representations of the curve C is used to include it in the bounding box B:
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//! - an exact representation if C is built from a line, a circle or a conic curve,
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//! - the poles of the curve if C is built from a Bezier curve or a BSpline curve,
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//! - if not, the points of an approximation of the curve C.
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Standard_EXPORT static void Add(const Handle(Geom2d_Curve)& C,
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const Standard_Real Tol,
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Bnd_Box2d& Box);
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//! Adds to the bounding box B the part of curve C
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//! B is then enlarged by the tolerance value Tol.
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//! U1, U2 - the parametric range to compute the bounding box;
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//! Note: depending on the type of curve, one of the following
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//! representations of the curve C is used to include it in the bounding box B:
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//! - an exact representation if C is built from a line, a circle or a conic curve,
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//! - the poles of the curve if C is built from a Bezier curve or a BSpline curve,
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//! - if not, the points of an approximation of the curve C.
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Standard_EXPORT static void Add(const Handle(Geom2d_Curve)& C,
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const Standard_Real U1,
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const Standard_Real U2,
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const Standard_Real Tol,
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Bnd_Box2d& B);
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//! Adds to the bounding box B the part of curve C
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//! B is then enlarged by the tolerance value Tol.
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//! U1, U2 - the parametric range to compute the bounding box;
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//! Note: depending on the type of curve, one of the following
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//! algorithms is used to include it in the bounding box B:
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//! - an exact analytical if C is built from a line, a circle or a conic curve,
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//! - numerical calculation of bounding box sizes, based on minimization algorithm, for other
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//! types of curve If Tol = < Precision::PConfusion(), Precision::PConfusion is used as tolerance
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//! for calculation
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Standard_EXPORT static void AddOptimal(const Handle(Geom2d_Curve)& C,
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const Standard_Real U1,
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const Standard_Real U2,
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const Standard_Real Tol,
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Bnd_Box2d& B);
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protected:
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private:
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};
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#endif // _BndLib_Add2dCurve_HeaderFile
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