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Check for double solutions has been added in algorithms Extrema_ELPCOfLocateExtPC and Extrema_ELPCOfLocateExtPC2d that find extrema between point and curve.
158 lines
4.8 KiB
C++
158 lines
4.8 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_ExtPC_HeaderFile
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#define _Extrema_ExtPC_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_Address.hxx>
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#include <gp_Pnt.hxx>
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#include <Extrema_ExtPElC.hxx>
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#include <Extrema_SequenceOfPOnCurv.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Real.hxx>
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#include <Extrema_EPCOfExtPC.hxx>
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#include <Standard_Integer.hxx>
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#include <GeomAbs_CurveType.hxx>
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#include <TColStd_SequenceOfBoolean.hxx>
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#include <TColStd_SequenceOfReal.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_ExtPElC;
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class gp_Pnt;
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class gp_Vec;
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class Extrema_POnCurv;
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class Extrema_EPCOfExtPC;
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class Extrema_PCFOfEPCOfExtPC;
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class Extrema_ExtPC
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{
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public:
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DEFINE_STANDARD_ALLOC
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Standard_EXPORT Extrema_ExtPC();
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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 searchs all the
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//! zeros inside the definition range of the curve.
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//! Zeros are searched between uinf and usup.
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//! Tol is 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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//! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
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Standard_EXPORT Extrema_ExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
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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 searchs all the
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//! zeros inside the definition range of the curve.
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//! Tol is 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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//! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
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Standard_EXPORT Extrema_ExtPC(const gp_Pnt& P, const Adaptor3d_Curve& C, const Standard_Real TolF = 1.0e-10);
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//! initializes the fields of the algorithm.
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Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
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//! An exception is raised if the fields have not been
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//! 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 value of the <N>th extremum square distance.
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Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N) 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 True if the <N>th 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 <N>th extremum distance.
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Standard_EXPORT const Extrema_POnCurv& Point (const Standard_Integer N) const;
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//! if the curve is a trimmed curve,
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//! dist1 is a square distance between <P> and the point
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//! of parameter FirstParameter <P1> and
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//! dist2 is a square distance between <P> and the point
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//! of parameter LastParameter <P2>.
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Standard_EXPORT void TrimmedSquareDistances (Standard_Real& dist1, Standard_Real& dist2, gp_Pnt& P1, gp_Pnt& P2) const;
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protected:
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Standard_EXPORT void IntervalPerform (const gp_Pnt& P);
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Standard_EXPORT void AddSol(const Standard_Real theU,
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const gp_Pnt& theP,
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const Standard_Real theSqDist,
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const Standard_Boolean isMin);
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private:
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Standard_Address myC;
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gp_Pnt Pf;
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gp_Pnt Pl;
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Extrema_ExtPElC myExtPElC;
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Extrema_SequenceOfPOnCurv mypoint;
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Standard_Boolean mydone;
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Standard_Real mydist1;
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Standard_Real mydist2;
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Extrema_EPCOfExtPC myExtPC;
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Standard_Real mytolu;
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Standard_Real mytolf;
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Standard_Integer mysample;
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Standard_Real myintuinf;
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Standard_Real myintusup;
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Standard_Real myuinf;
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Standard_Real myusup;
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GeomAbs_CurveType type;
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TColStd_SequenceOfBoolean myismin;
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TColStd_SequenceOfReal mySqDist;
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};
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#endif // _Extrema_ExtPC_HeaderFile
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