MinimizerParameters.cpp

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 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *
 * [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
 * [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
 * [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).
 * [4] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
 * [5] Kuang & Gezelter, Mol. Phys., 110, 691-701 (2012).
 * [6] Lamichhane, Gezelter & Newman, J. Chem. Phys. 141, 134109 (2014).
 * [7] Lamichhane, Newman & Gezelter, J. Chem. Phys. 141, 134110 (2014).
 * [8] Bhattarai, Newman & Gezelter, Phys. Rev. B 99, 094106 (2019).
 */
 
#include "optimization/MinimizerParameters.hpp"
 
#include <cstdlib>
#include <cstring>
#include <iostream>
 
namespace OpenMD {
  MinimizerParameters::MinimizerParameters() {
    DefineOptionalParameterWithDefaultValue(UseMinimizer, "useMinimizer",
                                            false);
    DefineOptionalParameterWithDefaultValue(Method, "method", "SD");
    DefineOptionalParameterWithDefaultValue(MaxIterations, "maxIterations",
                                            1000);
    DefineOptionalParameterWithDefaultValue(
        MaxStationaryStateIterations, "maxStationaryStateIterations", 100);
    DefineOptionalParameterWithDefaultValue(RootEpsilon, "rootEpsilon", 1e-5);
    DefineOptionalParameterWithDefaultValue(FunctionEpsilon, "functionEpsilon",
                                            1e-5);
    DefineOptionalParameterWithDefaultValue(GradientNormEpsilon,
                                            "gradientNormEpsilon", 1e-5);
    DefineOptionalParameterWithDefaultValue(InitialStepSize, "initialStepSize",
                                            0.1);
  }
 
  MinimizerParameters::~MinimizerParameters() {}
 
  void MinimizerParameters::validate() {
    CheckParameter(Method, isEqualIgnoreCase("SD") || isEqualIgnoreCase("CG") ||
                               isEqualIgnoreCase("BFGS"));
    CheckParameter(MaxIterations, isPositive());
    int one       = 1;
    int mi        = this->getMaxIterations();
    RealType zero = 0.0;
    RealType oneR = 1.0;
    CheckParameter(MaxStationaryStateIterations,
                   isGreaterThanOrEqualTo(one) && isLessThanOrEqualTo(mi));
    CheckParameter(RootEpsilon, isPositive());
    CheckParameter(GradientNormEpsilon, isPositive());
    CheckParameter(InitialStepSize,
                   isGreaterThan(zero) && isLessThanOrEqualTo(oneR));
  }
}  // namespace OpenMD