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117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
// Created on: 1991-02-26
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// Created by: Isabelle GRIGNON
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// Copyright (c) 1991-1999 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 _Extrema_LocEPCOfLocateExtPC2d_HeaderFile
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#define _Extrema_LocEPCOfLocateExtPC2d_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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#include <Standard_Boolean.hxx>
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#include <Extrema_PCLocFOfLocEPCOfLocateExtPC2d.hxx>
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class Standard_DomainError;
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class Standard_TypeMismatch;
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class StdFail_NotDone;
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class Adaptor2d_Curve2d;
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class Extrema_Curve2dTool;
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class Extrema_POnCurv2d;
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class gp_Pnt2d;
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class gp_Vec2d;
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class Extrema_PCLocFOfLocEPCOfLocateExtPC2d;
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class Extrema_LocEPCOfLocateExtPC2d
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{
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public:
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DEFINE_STANDARD_ALLOC
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Standard_EXPORT Extrema_LocEPCOfLocateExtPC2d();
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//! Calculates the distance with a close point.
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//! The close point is defined by the parameter value
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//! U0.
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//! The function F(u)=distance(P,C(u)) has an extremum
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//! when g(u)=dF/du=0. The algorithm searches a zero
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//! near the close point.
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//! TolU is used to decide to stop the iterations.
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//! At the nth iteration, the criteria is:
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//! abs(Un - Un-1) < TolU.
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Standard_EXPORT Extrema_LocEPCOfLocateExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real U0, const Standard_Real TolU);
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//! Calculates the distance with a close point.
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//! The close point is defined by the parameter value
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//! U0.
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//! The function F(u)=distance(P,C(u)) has an extremum
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//! when g(u)=dF/du=0. The algorithm searches a zero
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//! near the close point.
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//! Zeros are searched between Umin et Usup.
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//! TolU is used to decide to stop the iterations.
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//! At the nth iteration, the criteria is:
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//! abs(Un - Un-1) < TolU.
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Standard_EXPORT Extrema_LocEPCOfLocateExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real U0, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU);
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//! sets the fields of the algorithm.
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Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU);
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//! the algorithm is done with the point P.
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//! An exception is raised if the fields have not
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//! been initialized.
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Standard_EXPORT void Perform (const gp_Pnt2d& P, const Standard_Real U0);
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//! Returns True if the distance is found.
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Standard_EXPORT Standard_Boolean IsDone() const;
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//! Returns the value of the extremum square distance.
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Standard_EXPORT Standard_Real SquareDistance() const;
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//! Returns True if the extremum distance is a minimum.
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Standard_EXPORT Standard_Boolean IsMin() const;
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//! Returns the point of the extremum distance.
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Standard_EXPORT const Extrema_POnCurv2d& Point() const;
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protected:
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private:
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Standard_Boolean myDone;
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Standard_Real mytolU;
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Standard_Real myumin;
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Standard_Real myusup;
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Extrema_PCLocFOfLocEPCOfLocateExtPC2d myF;
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};
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#endif // _Extrema_LocEPCOfLocateExtPC2d_HeaderFile
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