ImplicitEulerStep.hpp

#ifndef DEF_VARIATIONAL_IMPLICITEULERSTEP
#define DEF_VARIATIONAL_IMPLICITEULERSTEP

#include <NOX.H>
#include <NOX_Common.H>
#include <NOX_Utils.H>
#include <Teuchos_StandardCatchMacros.hpp>

namespace Variational {

template <typename T_M,
          typename T_Q,
          typename T_TQ>
class ImplicitEulerStep : public Abstract::Step<T_M,T_Q,T_TQ>
{
private:
    Teuchos::RCP<Teuchos::ParameterList>            m_solverParametersPtr;
    Teuchos::RCP<NOX::StatusTest::Combo>            m_statusTests;
    Teuchos::RCP<NOXGroup<T_Q,1>>                   m_grp;
    Teuchos::RCP<NOX::Solver::Generic>              m_solver;

public:
    ImplicitEulerStep<T_M,T_Q,T_TQ> (Abstract::Problem<T_M,T_Q>& problem)
    :   Abstract::Step<T_M,T_Q,T_TQ>(problem)
    {
        // m_internals is already initalized by base constructor, overriding
        ImplicitEulerStepInternals<T_M,T_Q,T_TQ>* internals = new ImplicitEulerStepInternals<T_M,T_Q,T_TQ>(problem);
        this->m_internals = internals;

        // NOX
        this->m_solverParametersPtr = Teuchos::rcp(new Teuchos::ParameterList);
        Teuchos::ParameterList& solverParameters = *m_solverParametersPtr;

        solverParameters.set("Nonlinear Solver","Line Search Based");
        Teuchos::ParameterList& lineSearchParameters = solverParameters.sublist("Line Search");
        lineSearchParameters.set("Method","Full Step");

        Teuchos::RCP<NOX::StatusTest::NormF> statusTestA = Teuchos::rcp(new NOX::StatusTest::NormF(1.0e-8,NOX::StatusTest::NormF::Unscaled));
        Teuchos::RCP<NOX::StatusTest::MaxIters> statusTestB = Teuchos::rcp(new NOX::StatusTest::MaxIters(500));
        this->m_statusTests = Teuchos::rcp(new NOX::StatusTest::Combo(NOX::StatusTest::Combo::OR,statusTestA,statusTestB));

        ImplicitEulerStepInternals<T_M,T_Q,T_TQ>* tmp = static_cast<ImplicitEulerStepInternals<T_M,T_Q,T_TQ>*>(this->m_internals);
        this->m_grp = Teuchos::rcp(new NOXGroup<T_Q,1>(*tmp));
        this->m_solver = NOX::Solver::buildSolver(this->m_grp,this->m_statusTests,this->m_solverParametersPtr);
    }

    ~ImplicitEulerStep<T_M,T_Q,T_TQ> ()
    { }

    void
    setData (T_M h_var, T_Q q0_var, T_Q q1_var)
    { this->m_internals->setData(h_var,q0_var,q1_var); }
    
    void
    initialize (void)
    { }

    const T_Q
    makeStep (void)
    {
        // TODO: faire des tests pour voir si tout se passe bien
        bool success = true;
        bool verbose = false;

        try {
            m_solver->reset(static_cast<ImplicitEulerStepInternals<T_M,T_Q,T_TQ>*>(this->m_internals)->getInitialGuess());
            NOX::StatusTest::StatusType status = m_solver->solve();
            const NOXGroup<T_Q,1>& solnGrp = dynamic_cast<const NOXGroup<T_Q,1>&>(m_solver->getSolutionGroup());
            const NOXVector<T_Q::DOF>& solnVec = dynamic_cast<const NOXVector<T_Q::DOF>&>(solnGrp.getX());

            if (status != NOX::StatusTest::Converged)
                success = false;

            T_Q solution(solnVec);

            return solution;
        } TEUCHOS_STANDARD_CATCH_STATEMENTS(verbose, std::cerr, success);
    }
};
} // namespace Variational

#endif