NOX::Direction::Generic Class Reference

Generic direction interface More...

#include <NOX_Direction_Generic.H>

Inheritance diagram for NOX::Direction::Generic:

Public Member Functions
	Generic ()
	Constructor. More...
virtual	~Generic ()
	Destructor.
virtual bool	reset (const Teuchos::RCP< NOX::GlobalData > &gd, Teuchos::ParameterList &params)=0
	Reset direction based on possibly new parameters.
virtual bool	compute (NOX::Abstract::Vector &dir, NOX::Abstract::Group &grp, const NOX::Solver::Generic &solver)=0
	Compute the direction vector, dir, for a specific method given the current group, grp. More...
virtual bool	compute (NOX::Abstract::Vector &dir, NOX::Abstract::Group &grp, const NOX::Solver::LineSearchBased &solver)
	Same as compute(NOX::Abstract::Vector&, NOX::Abstract::Group&, const NOX::Solver::Generic&) More...

Detailed Description

Generic direction interface

Generic interface for calculating a search direction, , to be used in updating the iterate.

Constructor & Destructor Documentation

NOX::Direction::Generic::Generic ( )

inline

Constructor.

Constructors of derived objects should look like reset().

Member Function Documentation

virtual bool NOX::Direction::Generic::compute ( NOX::Abstract::Vector &  dir, NOX::Abstract::Group &  grp, const NOX::Solver::Generic &  solver  )

pure virtual

Compute the direction vector, dir, for a specific method given the current group, grp.

The grp is not const so that we can compute the F vector, the Jacobian matrix, the Newton vector, and so on.

Const access to the solver is used for getting additional information such as the past solution, the iteration number, and so on.

Implemented in NOX::Direction::Broyden, NOX::Direction::Newton, NOX::Direction::NonlinearCG, and NOX::Direction::SteepestDescent.

Referenced by compute(), NOX::Direction::SteepestDescent::compute(), NOX::Direction::NonlinearCG::compute(), and NOX::Direction::Newton::compute().

bool NOX::Direction::Generic::compute ( NOX::Abstract::Vector &  dir, NOX::Abstract::Group &  grp, const NOX::Solver::LineSearchBased &  solver  )

virtual

Same as compute(NOX::Abstract::Vector&, NOX::Abstract::Group&, const NOX::Solver::Generic&)

Enables direct support for line search based solvers for the purpose of efficiency since the LineSearchBased object has a getStep() function that some directions require.

If it is not redefined in the derived class, it will just call the compute with the NOX::Solver::Generic argument.

Reimplemented in NOX::Direction::Broyden, NOX::Direction::Newton, NOX::Direction::NonlinearCG, and NOX::Direction::SteepestDescent.

References compute().

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The documentation for this class was generated from the following files:

• NOX_Direction_Generic.H
• NOX_Direction_Generic.C