00001 // $Id: LOCA_StepSize_Constant.H,v 1.17 2007/06/21 16:22:52 rhoope Exp $ 00002 // $Source: /space/CVS/Trilinos/packages/nox/src-loca/src/LOCA_StepSize_Constant.H,v $ 00003 00004 //@HEADER 00005 // ************************************************************************ 00006 // 00007 // NOX: An Object-Oriented Nonlinear Solver Package 00008 // Copyright (2002) Sandia Corporation 00009 // 00010 // LOCA: Library of Continuation Algorithms Package 00011 // Copyright (2005) Sandia Corporation 00012 // 00013 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive 00014 // license for use of this work by or on behalf of the U.S. Government. 00015 // 00016 // This library is free software; you can redistribute it and/or modify 00017 // it under the terms of the GNU Lesser General Public License as 00018 // published by the Free Software Foundation; either version 2.1 of the 00019 // License, or (at your option) any later version. 00020 // 00021 // This library is distributed in the hope that it will be useful, but 00022 // WITHOUT ANY WARRANTY; without even the implied warranty of 00023 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00024 // Lesser General Public License for more details. 00025 // 00026 // You should have received a copy of the GNU Lesser General Public 00027 // License along with this library; if not, write to the Free Software 00028 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00029 // USA 00030 // 00031 // Questions? Contact Roger Pawlowski (rppawlo@sandia.gov) or 00032 // Eric Phipps (etphipp@sandia.gov), Sandia National Laboratories. 00033 // ************************************************************************ 00034 // CVS Information 00035 // $Source: /space/CVS/Trilinos/packages/nox/src-loca/src/LOCA_StepSize_Constant.H,v $ 00036 // $Author: rhoope $ 00037 // $Date: 2007/06/21 16:22:52 $ 00038 // $Revision: 1.17 $ 00039 // ************************************************************************ 00040 //@HEADER 00041 00042 #ifndef LOCA_STEPSIZE_CONSTANT_H 00043 #define LOCA_STEPSIZE_CONSTANT_H 00044 00045 #include "Teuchos_RCP.hpp" 00046 00047 #include "LOCA_StepSize_AbstractStrategy.H" // base class 00048 00049 // forward declarations 00050 namespace LOCA { 00051 class GlobalData; 00052 namespace Parameter { 00053 class SublistParser; 00054 } 00055 } 00056 00057 namespace LOCA { 00058 00059 namespace StepSize { 00060 00062 00091 class Constant : public LOCA::StepSize::AbstractStrategy { 00092 00093 public: 00094 00096 Constant( 00097 const Teuchos::RCP<LOCA::GlobalData>& global_data, 00098 const Teuchos::RCP<LOCA::Parameter::SublistParser>& topParams, 00099 const Teuchos::RCP<Teuchos::ParameterList>& stepsizeParams); 00100 00102 virtual ~Constant(); 00103 00105 00116 virtual NOX::Abstract::Group::ReturnType 00117 computeStepSize(LOCA::MultiContinuation::AbstractStrategy& curGroup, 00118 const LOCA::MultiContinuation::ExtendedVector& predictor, 00119 const NOX::Solver::Generic& solver, 00120 const LOCA::Abstract::Iterator::StepStatus& stepStatus, 00121 const LOCA::Stepper& stepper, 00122 double& stepSize); 00123 00125 virtual double getPrevStepSize() const; 00126 00128 virtual double getStartStepSize() const; 00129 00130 protected: 00131 00140 virtual NOX::Abstract::Group::ReturnType 00141 clipStepSize(double& stepSize); 00142 00143 protected: 00144 00146 Teuchos::RCP<LOCA::GlobalData> globalData; 00147 00149 double maxStepSize; 00150 00152 double minStepSize; 00153 00155 double startStepSize; 00156 00158 double failedFactor; 00159 00161 double successFactor; 00162 00164 double prevStepSize; 00165 00167 bool isFirstStep; 00168 }; 00169 } // namespace StepSize 00170 } // namespace LOCA 00171 00172 #endif