mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-04-05 18:16:23 +03:00
42cf5bc1ca
Automatic upgrade of OCCT code by command "occt_upgrade . -nocdl": - WOK-generated header files from inc and sources from drv are moved to src - CDL files removed - All packages are converted to nocdlpack
131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
// Created on: 1991-05-14
|
|
// Created by: Laurent PAINNOT
|
|
// Copyright (c) 1991-1999 Matra Datavision
|
|
// Copyright (c) 1999-2014 OPEN CASCADE SAS
|
|
//
|
|
// This file is part of Open CASCADE Technology software library.
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify it under
|
|
// the terms of the GNU Lesser General Public License version 2.1 as published
|
|
// by the Free Software Foundation, with special exception defined in the file
|
|
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
|
|
// distribution for complete text of the license and disclaimer of any warranty.
|
|
//
|
|
// Alternatively, this file may be used under the terms of Open CASCADE
|
|
// commercial license or contractual agreement.
|
|
|
|
#ifndef _math_Powell_HeaderFile
|
|
#define _math_Powell_HeaderFile
|
|
|
|
#include <Standard.hxx>
|
|
#include <Standard_DefineAlloc.hxx>
|
|
#include <Standard_Handle.hxx>
|
|
|
|
#include <Standard_Boolean.hxx>
|
|
#include <math_Vector.hxx>
|
|
#include <Standard_Real.hxx>
|
|
#include <Standard_Integer.hxx>
|
|
#include <math_Status.hxx>
|
|
#include <math_Matrix.hxx>
|
|
#include <Standard_OStream.hxx>
|
|
class StdFail_NotDone;
|
|
class Standard_DimensionError;
|
|
class math_MultipleVarFunction;
|
|
class math_Matrix;
|
|
|
|
|
|
|
|
//! This class implements the Powell method to find the minimum of
|
|
//! function of multiple variables (the gradient does not have to be known).
|
|
class math_Powell
|
|
{
|
|
public:
|
|
|
|
DEFINE_STANDARD_ALLOC
|
|
|
|
|
|
//! Constructor. Initialize new entity.
|
|
Standard_EXPORT math_Powell(const math_MultipleVarFunction& theFunction, const Standard_Real theTolerance, const Standard_Integer theNbIterations = 200, const Standard_Real theZEPS = 1.0e-12);
|
|
|
|
//! Destructor alias
|
|
void Delete() const;
|
|
Standard_EXPORT virtual ~math_Powell();
|
|
|
|
|
|
//! Computes Powell minimization on the function F given
|
|
//! theStartingPoint, and an initial matrix theStartingDirection
|
|
//! whose columns contain the initial set of directions.
|
|
//! The solution F = Fi is found when:
|
|
//! 2.0 * abs(Fi - Fi-1) =< Tolerance * (abs(Fi) + abs(Fi-1) + ZEPS).
|
|
Standard_EXPORT void Perform (math_MultipleVarFunction& theFunction, const math_Vector& theStartingPoint, const math_Matrix& theStartingDirections);
|
|
|
|
|
|
//! Solution F = Fi is found when:
|
|
//! 2.0 * abs(Fi - Fi-1) <= Tolerance * (abs(Fi) + abs(Fi-1)) + ZEPS.
|
|
//! The maximum number of iterations allowed is given by NbIterations.
|
|
virtual Standard_Boolean IsSolutionReached (math_MultipleVarFunction& theFunction);
|
|
|
|
//! Returns true if the computations are successful, otherwise returns false.
|
|
Standard_Boolean IsDone() const;
|
|
|
|
//! returns the location vector of the minimum.
|
|
//! Exception NotDone is raised if the minimum was not found.
|
|
const math_Vector& Location() const;
|
|
|
|
//! outputs the location vector of the minimum in Loc.
|
|
//! Exception NotDone is raised if the minimum was not found.
|
|
//! Exception DimensionError is raised if the range of Loc is not
|
|
//! equal to the range of the StartingPoint.
|
|
void Location (math_Vector& Loc) const;
|
|
|
|
//! Returns the value of the minimum.
|
|
//! Exception NotDone is raised if the minimum was not found.
|
|
Standard_Real Minimum() const;
|
|
|
|
//! Returns the number of iterations really done during the
|
|
//! computation of the minimum.
|
|
//! Exception NotDone is raised if the minimum was not found.
|
|
Standard_Integer NbIterations() const;
|
|
|
|
//! Prints information on the current state of the object.
|
|
//! Is used to redefine the operator <<.
|
|
Standard_EXPORT void Dump (Standard_OStream& o) const;
|
|
|
|
|
|
|
|
|
|
protected:
|
|
|
|
|
|
|
|
math_Vector TheLocation;
|
|
Standard_Real TheMinimum;
|
|
Standard_Real TheLocationError;
|
|
Standard_Real PreviousMinimum;
|
|
Standard_Real XTol;
|
|
Standard_Real EPSZ;
|
|
|
|
|
|
private:
|
|
|
|
|
|
|
|
Standard_Boolean Done;
|
|
Standard_Integer Iter;
|
|
math_Status TheStatus;
|
|
math_Matrix TheDirections;
|
|
Standard_Integer State;
|
|
Standard_Integer Itermax;
|
|
|
|
|
|
};
|
|
|
|
|
|
#include <math_Powell.lxx>
|
|
|
|
|
|
|
|
|
|
|
|
#endif // _math_Powell_HeaderFile
|