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// This file is generated by WOK (CPPExt).
// Please do not edit this file; modify original file instead.
// The copyright and license terms as defined for the original file apply to
// this header file considered to be the "object code" form of the original source.
#ifndef _math_Powell_HeaderFile
#define _math_Powell_HeaderFile
#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Macro.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
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