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134 lines
4.4 KiB
C++
134 lines
4.4 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_EPCOfExtPC_HeaderFile
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#define _Extrema_EPCOfExtPC_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Integer.hxx>
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#include <Extrema_PCFOfEPCOfExtPC.hxx>
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class StdFail_NotDone;
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class Standard_OutOfRange;
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class Standard_TypeMismatch;
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class Adaptor3d_Curve;
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class Extrema_CurveTool;
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class Extrema_POnCurv;
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class gp_Pnt;
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class gp_Vec;
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class Extrema_PCFOfEPCOfExtPC;
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class Extrema_EPCOfExtPC
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{
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public:
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DEFINE_STANDARD_ALLOC
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Standard_EXPORT Extrema_EPCOfExtPC();
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//! It calculates all the distances.
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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 all the
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//! zeros inside the definition range of the curve.
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//! NbU is used to locate the close points to
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//! find the zeros.
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//! Tol and TolU are used to decide to stop the
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//! iterations according to the following condition:
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//! if n is the number of iterations,
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//! abs(Un-Un-1) < TolU and abs(F(Un)-F(Un-1)) < Tol.
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Standard_EXPORT Extrema_EPCOfExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Integer NbU, const Standard_Real TolU, const Standard_Real TolF);
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//! It calculates all the distances.
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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 all the
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//! zeros inside the definition range of the curve.
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//! NbU is used to locate the close points to
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//! find the zeros.
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//! Zeros are searched between umin and usup.
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//! Tol and TolU are used to decide to stop the
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//! iterations according to the following condition:
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//! if n is the number of iterations,
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//! abs(Un-Un-1) < TolU and abs(F(Un)-F(Un-1)) < Tol.
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Standard_EXPORT Extrema_EPCOfExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Integer NbU, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU, const Standard_Real TolF);
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//! sets the fields of the algorithm.
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Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Integer NbU, const Standard_Real TolU, const Standard_Real TolF);
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//! sets the fields of the algorithm.
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Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Integer NbU, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU, const Standard_Real TolF);
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//! sets the fields of the algorithm.
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Standard_EXPORT void Initialize (const Adaptor3d_Curve& C);
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//! sets the fields of the algorithm.
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Standard_EXPORT void Initialize (const Standard_Integer NbU, const Standard_Real Umin, const Standard_Real Usup, const Standard_Real TolU, const Standard_Real TolF);
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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_Pnt& P);
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//! True if the distances are found.
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Standard_EXPORT Standard_Boolean IsDone() const;
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//! Returns the number of extremum distances.
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Standard_EXPORT Standard_Integer NbExt() const;
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//! Returns the value of the Nth extremum square distance.
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Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N) const;
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//! Returns True if the Nth extremum distance is a
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//! minimum.
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Standard_EXPORT Standard_Boolean IsMin (const Standard_Integer N) const;
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//! Returns the point of the Nth extremum distance.
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Standard_EXPORT const Extrema_POnCurv& Point (const Standard_Integer N) const;
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protected:
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private:
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Standard_Boolean myDone;
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Standard_Boolean myInit;
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Standard_Integer mynbsample;
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Standard_Real myumin;
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Standard_Real myusup;
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Standard_Real mytolu;
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Standard_Real mytolF;
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Extrema_PCFOfEPCOfExtPC myF;
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};
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#endif // _Extrema_EPCOfExtPC_HeaderFile
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