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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
#ifndef _Standard_HeaderFile
#include <Standard.hxx>
#endif
#ifndef _Standard_Macro_HeaderFile
#include <Standard_Macro.hxx>
#endif
#ifndef _Standard_Boolean_HeaderFile
#include <Standard_Boolean.hxx>
#endif
#ifndef _math_Vector_HeaderFile
#include <math_Vector.hxx>
#endif
#ifndef _Standard_Real_HeaderFile
#include <Standard_Real.hxx>
#endif
#ifndef _Standard_Integer_HeaderFile
#include <Standard_Integer.hxx>
#endif
#ifndef _math_Status_HeaderFile
#include <math_Status.hxx>
#endif
#ifndef _math_Matrix_HeaderFile
#include <math_Matrix.hxx>
#endif
#ifndef _Standard_OStream_HeaderFile
#include <Standard_OStream.hxx>
#endif
class StdFail_NotDone;
class Standard_DimensionError;
class math_MultipleVarFunction;
class math_Vector;
class math_Matrix;
//! This class implements the Powell method to find the minimum of <br>
//! function of multiple variables (the gradient does not have to be known). <br>
class math_Powell {
public:
void* operator new(size_t,void* anAddress)
{
return anAddress;
}
void* operator new(size_t size)
{
return Standard::Allocate(size);
}
void operator delete(void *anAddress)
{
if (anAddress) Standard::Free((Standard_Address&)anAddress);
}
//! Computes Powell minimization on the function F given <br>
//! StartingPoint, and an initial matrix StartingDirection <br>
//! whose columns contain the initial set of directions. The <br>
//! solution F = Fi is found when 2.0 * abs(Fi - Fi-1) = <br>
//! <Tolerance * (abs(Fi) + abs(Fi-1) + ZEPS). The maximum <br>
//! number of iterations allowed is given by NbIterations. <br>
Standard_EXPORT math_Powell(math_MultipleVarFunction& F,const math_Vector& StartingPoint,const math_Matrix& StartingDirections,const Standard_Real Tolerance,const Standard_Integer NbIterations = 200,const Standard_Real ZEPS = 1.0e-12);
//! is used in a sub-class to initialize correctly all the fields <br>
//! of this class. <br>
Standard_EXPORT math_Powell(math_MultipleVarFunction& F,const Standard_Real Tolerance,const Standard_Integer NbIterations = 200,const Standard_Real ZEPS = 1.0e-12);
Standard_EXPORT virtual void Delete() ;
Standard_EXPORT virtual ~math_Powell(){Delete();}
//! Use this method after a call to the initialization constructor <br>
//! to compute the minimum of function F. <br>
//! Warning <br>
//! The initialization constructor must have been called before <br>
//! the Perform method is called. <br>
Standard_EXPORT void Perform(math_MultipleVarFunction& F,const math_Vector& StartingPoint,const math_Matrix& StartingDirections) ;
//! solution F = Fi is found when : <br>
//! 2.0 * abs(Fi - Fi-1) <= Tolerance * (abs(Fi) + abs(Fi-1)) + ZEPS. <br>
//! The maximum number of iterations allowed is given by NbIterations. <br>
Standard_EXPORT virtual Standard_Boolean IsSolutionReached(math_MultipleVarFunction& F) ;
//! Returns true if the computations are successful, otherwise returns false. <br>
Standard_Boolean IsDone() const;
//! returns the location vector of the minimum. <br>
//! Exception NotDone is raised if the minimum was not found. <br>
const math_Vector& Location() const;
//! outputs the location vector of the minimum in Loc. <br>
//! Exception NotDone is raised if the minimum was not found. <br>
//! Exception DimensionError is raised if the range of Loc is not <br>
//! equal to the range of the StartingPoint. <br>
void Location(math_Vector& Loc) const;
//! Returns the value of the minimum. <br>
//! Exception NotDone is raised if the minimum was not found. <br>
Standard_Real Minimum() const;
//! Returns the number of iterations really done during the <br>
//! computation of the minimum. <br>
//! Exception NotDone is raised if the minimum was not found. <br>
Standard_Integer NbIterations() const;
//! Prints information on the current state of the object. <br>
//! Is used to redefine the operator <<. <br>
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>
// other Inline functions and methods (like "C++: function call" methods)
#endif
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