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// Copyright (C) 2004, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors: Carl Laird, Andreas Waechter IBM 2004-09-24
#ifndef __IPRESTOITERATEINITIALIZER_HPP__
#define __IPRESTOITERATEINITIALIZER_HPP__
#include "IpIterateInitializer.hpp"
#include "IpEqMultCalculator.hpp"
namespace Ipopt
{
/** Class implementing the default initialization procedure (based
* on user options) for the iterates.
*
* It is used at the very beginning of the optimization for
* determine the starting point for all variables.
*/
class RestoIterateInitializer: public IterateInitializer
{
public:
/**@name Constructors/Destructors */
///@{
/** Constructor.
*
* If eq_mult_calculator is not NULL, it will be
* used to compute the initial values for equality constraint
* multipliers.
*/
RestoIterateInitializer(
const SmartPtr<EqMultiplierCalculator>& eq_mult_calculator
);
/** Destructor */
virtual ~RestoIterateInitializer()
{ }
///@}
virtual bool InitializeImpl(
const OptionsList& options,
const std::string& prefix
);
/** Compute the initial iterates and set the into the curr field
* of the ip_data object.
*/
virtual bool SetInitialIterates();
static void RegisterOptions(
SmartPtr<RegisteredOptions> roptions
);
private:
/**@name Default Compiler Generated Methods
* (Hidden to avoid implicit creation/calling).
*
* These methods are not implemented and
* we do not want the compiler to implement
* them for us, so we declare them private
* and do not define them. This ensures that
* they will not be implicitly created/called.
*/
///@{
/** Default Constructor */
RestoIterateInitializer();
/** Copy Constructor */
RestoIterateInitializer(
const RestoIterateInitializer&
);
/** Default Assignment Operator */
void operator=(
const RestoIterateInitializer&
);
///@}
/**@name Parameters for bumping x0 */
///@{
/** If max-norm of the initial equality constraint multiplier
* estimate is larger than this, the initial y_* variables are
* set to zero.
*/
Number constr_mult_init_max_;
///@}
/** object to be used for the initialization of the equality
* constraint multipliers.
*/
SmartPtr<EqMultiplierCalculator> resto_eq_mult_calculator_;
/** @name Auxiliary functions */
///@{
/** Method for solving the quadratic vector equation v^2 + 2a*v - b = 0 */
void solve_quadratic(
const Vector& a,
const Vector& b,
Vector& v
);
///@}
};
} // namespace Ipopt
#endif