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859a47c3d1
The calling of virtual methods has been removed from constructors & destructors: math_BissecNewton math_BrentMinimum math_FRPR math_FunctionSetRoot math_NewtonFunctionSetRoot math_NewtonMinimum math_Powell
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
// Created on: 1995-07-18
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// Created by: Modelistation
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// Copyright (c) 1995-1999 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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#include <Extrema_GenLocateExtPS.ixx>
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#include <Extrema_FuncExtPS.hxx>
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#include <StdFail_NotDone.hxx>
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#include <gp.hxx>
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#include <math_FunctionSetRoot.hxx>
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#include <math_NewtonFunctionSetRoot.hxx>
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#include <math_Vector.hxx>
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//=============================================================================
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Extrema_GenLocateExtPS::Extrema_GenLocateExtPS () { myDone = Standard_False; }
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//=============================================================================
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Extrema_GenLocateExtPS::Extrema_GenLocateExtPS (const gp_Pnt& P,
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const Adaptor3d_Surface& S,
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const Standard_Real U0,
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const Standard_Real V0,
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const Standard_Real TolU,
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const Standard_Real TolV)
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/*-----------------------------------------------------------------------------
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Function:
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Find (U,V) close to (U0,V0) so that dist(S(U,V),P) was extreme.
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Method:
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If (u,v) is a solution, it is possible to write:
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{ F1(u,v) = (S(u,v)-P).dS/du(u,v) = 0.
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{ F2(u,v) = (S(u,v)-P).dS/dv(u,v) = 0.
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The problem consists in finding, in the interval of surface definition,
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the root of the system closest to (U0,V0).
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Use class math_FunctionSetRoot with the following construction arguments:
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- F: Extrema_FuncExtPS created from P and S,
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- U0V0: math_Vector (U0,V0),
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- Tol: Min(TolU,TolV),
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- math_Vector (Uinf,Usup),
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- math_Vector (Vinf,Vsup),
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- 100. .
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---------------------------------------------------------------------------*/
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{
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myDone = Standard_False;
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Standard_Real Uinf, Usup, Vinf, Vsup;
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Uinf = S.FirstUParameter();
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Usup = S.LastUParameter();
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Vinf = S.FirstVParameter();
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Vsup = S.LastVParameter();
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Extrema_FuncExtPS F (P,S);
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math_Vector Tol(1, 2), Start(1, 2), BInf(1, 2), BSup(1, 2);
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Tol(1) = TolU;
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Tol(2) = TolV;
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Start(1) = U0;
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Start(2) = V0;
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BInf(1) = Uinf;
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BInf(2) = Vinf;
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BSup(1) = Usup;
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BSup(2) = Vsup;
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math_FunctionSetRoot SR (F, Tol);
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SR.Perform(F, Start, BInf, BSup);
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if (!SR.IsDone())
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return;
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mySqDist = F.SquareDistance(1);
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myPoint = F.Point(1);
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myDone = Standard_True;
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}
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//=============================================================================
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Standard_Boolean Extrema_GenLocateExtPS::IsDone () const { return myDone; }
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//=============================================================================
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Standard_Real Extrema_GenLocateExtPS::SquareDistance () const
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{
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if (!IsDone()) { StdFail_NotDone::Raise(); }
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return mySqDist;
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}
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//=============================================================================
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const Extrema_POnSurf& Extrema_GenLocateExtPS::Point () const
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{
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if (!IsDone()) { StdFail_NotDone::Raise(); }
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return myPoint;
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}
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//=============================================================================
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