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e5260e1dfa
Euclidean distance criteria is added for local point / surface extrema. Classes representing objective criteria are renamed to be consistent. Local extrema usage is updated according to new behavior. Test case is added. Misprint correction.
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
// Created on: 2016-05-10
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// Created by: Alexander MALYSHEV
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// Copyright (c) 1991-1999 Matra Datavision
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// Copyright (c) 1999-2016 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_FuncPSDsit_HeaderFile
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#define _Extrema_FuncPSDsit_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <math_MultipleVarFunctionWithGradient.hxx>
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#include <gp_Pnt.hxx>
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#include <Adaptor3d_Surface.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Integer.hxx>
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class math_Vector;
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//! Functional for search of extremum of the square Euclidean distance between point P and
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//! surface S, starting from approximate solution (u0, v0).
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//!
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//! The class inherits math_MultipleVarFunctionWithGradient and thus is intended
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//! for use in math_BFGS algorithm.
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//!
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//! The criteria is:
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//! F = SquareDist(P, S(u, v)) - > min
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//!
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//! The first derivative are:
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//! F1(u,v) = (S(u,v) - P) * Su
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//! F2(u,v) = (S(u,v) - P) * Sv
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//!
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//! Su and Sv are first derivatives of the surface, * symbol means dot product.
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class Extrema_FuncPSDist : public math_MultipleVarFunctionWithGradient
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Constructor.
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Standard_EXPORT Extrema_FuncPSDist(const Adaptor3d_Surface& theS,
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const gp_Pnt& theP);
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//! Number of variables.
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Standard_EXPORT Standard_Integer NbVariables() const Standard_OVERRIDE;
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//! Value.
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Standard_EXPORT Standard_Boolean Value(const math_Vector& X,Standard_Real& F) Standard_OVERRIDE;
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//! Gradient.
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Standard_EXPORT Standard_Boolean Gradient(const math_Vector& X,math_Vector& G) Standard_OVERRIDE;
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//! Value and gradient.
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Standard_EXPORT Standard_Boolean Values(const math_Vector& X,Standard_Real& F,math_Vector& G) Standard_OVERRIDE;
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private:
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//! Check point is inside of the surface parameter space.
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//! Returns true if inside and false otherwise.
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Standard_Boolean IsInside(const math_Vector& X);
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const Extrema_FuncPSDist& operator=(const Extrema_FuncPSDist&);
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Extrema_FuncPSDist(const Extrema_FuncPSDist&);
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const Adaptor3d_Surface &mySurf;
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const gp_Pnt &myP;
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};
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#endif // _Extrema_FuncPSDsit_HeaderFile
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