FluctuatingChargeParameters.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 "flucq/FluctuatingChargeParameters.hpp"
 
#include <cstdlib>
#include <cstring>
#include <iostream>
 
namespace OpenMD {
  FluctuatingChargeParameters::FluctuatingChargeParameters() {
    DefineOptionalParameterWithDefaultValue(Propagator, "propagator", "Damped");
    DefineOptionalParameterWithDefaultValue(DoInitialOptimization,
                                            "doInitialOptimization", true);
    DefineOptionalParameterWithDefaultValue(ChargeOptimizationMethod, "method",
                                            "CG");
    DefineOptionalParameterWithDefaultValue(Friction, "friction", 1600.0);
    DefineOptionalParameterWithDefaultValue(Tolerance, "tolerance", 1.0e-5);
    DefineOptionalParameterWithDefaultValue(MaxIterations, "maxIterations",
                                            100);
    DefineOptionalParameterWithDefaultValue(TargetTemp, "targetTemp", 1.0e-6);
    DefineOptionalParameterWithDefaultValue(TauThermostat, "tauThermostat",
                                            10.0);
    DefineOptionalParameterWithDefaultValue(DragCoefficient, "dragCoefficient",
                                            0.01);
    DefineOptionalParameterWithDefaultValue(ConstrainRegions,
                                            "constrainRegions", false);
    DefineOptionalParameterWithDefaultValue(InitialStepSize, "initialStepSize",
                                            0.1);
  }
 
  void FluctuatingChargeParameters::validate() {
    CheckParameter(Propagator,
                   isEqualIgnoreCase("Damped") || isEqualIgnoreCase("NVT") ||
                       isEqualIgnoreCase("Langevin") ||
                       isEqualIgnoreCase("Minimizer") ||
                       isEqualIgnoreCase("NVE") || isEqualIgnoreCase("Exact"));
    CheckParameter(Friction, isNonNegative());
    CheckParameter(Tolerance, isPositive());
    CheckParameter(ChargeOptimizationMethod, isEqualIgnoreCase("SD") ||
                                                 isEqualIgnoreCase("CG") ||
                                                 isEqualIgnoreCase("BFGS"));
    CheckParameter(MaxIterations, isPositive());
    CheckParameter(TargetTemp, isNonNegative());
    CheckParameter(TauThermostat, isPositive());
    CheckParameter(DragCoefficient, isPositive());
    RealType zero = 0.0;
    RealType one  = 1.0;
    CheckParameter(InitialStepSize,
                   isGreaterThan(zero) && isLessThanOrEqualTo(one));
  }
 
}  // namespace OpenMD