CustomBondForce.cpp

/* -------------------------------------------------------------------------- *
 *                                   OpenMM                                   *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit originating from   *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org.               *
 *                                                                            *
 * Portions copyright (c) 2008-2009 Stanford University and the Authors.      *
 * Authors: Peter Eastman                                                     *
 * Contributors:                                                              *
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#include "openmm/Force.h"
#include "openmm/OpenMMException.h"
#include "openmm/CustomBondForce.h"
#include "openmm/internal/AssertionUtilities.h"
#include "openmm/internal/CustomBondForceImpl.h"
#include <cmath>
#include <map>
#include <sstream>
#include <utility>

using namespace OpenMM;
using std::string;
using std::stringstream;
using std::vector;

CustomBondForce::CustomBondForce(const string& energy) : energyExpression(energy) {
}

const string& CustomBondForce::getEnergyFunction() const {
    return energyExpression;
}

void CustomBondForce::setEnergyFunction(const std::string& energy) {
    energyExpression = energy;
}

int CustomBondForce::addPerBondParameter(const string& name) {
    parameters.push_back(BondParameterInfo(name));
    return parameters.size()-1;
}

const string& CustomBondForce::getPerBondParameterName(int index) const {
    ASSERT_VALID_INDEX(index, parameters);
    return parameters[index].name;
}

void CustomBondForce::setPerBondParameterName(int index, const string& name) {
    ASSERT_VALID_INDEX(index, parameters);
    parameters[index].name = name;
}

int CustomBondForce::addGlobalParameter(const string& name, double defaultValue) {
    globalParameters.push_back(GlobalParameterInfo(name, defaultValue));
    return globalParameters.size()-1;
}

const string& CustomBondForce::getGlobalParameterName(int index) const {
    ASSERT_VALID_INDEX(index, globalParameters);
    return globalParameters[index].name;
}

void CustomBondForce::setGlobalParameterName(int index, const string& name) {
    ASSERT_VALID_INDEX(index, globalParameters);
    globalParameters[index].name = name;
}

double CustomBondForce::getGlobalParameterDefaultValue(int index) const {
    ASSERT_VALID_INDEX(index, globalParameters);
    return globalParameters[index].defaultValue;
}

void CustomBondForce::setGlobalParameterDefaultValue(int index, double defaultValue) {
    ASSERT_VALID_INDEX(index, globalParameters);
    globalParameters[index].defaultValue = defaultValue;
}

int CustomBondForce::addBond(int particle1, int particle2, const vector<double>& parameters) {
    bonds.push_back(BondInfo(particle1, particle2, parameters));
    return bonds.size()-1;
}

void CustomBondForce::getBondParameters(int index, int& particle1, int& particle2, std::vector<double>& parameters) const {
    ASSERT_VALID_INDEX(index, bonds);
    particle1 = bonds[index].particle1;
    particle2 = bonds[index].particle2;
    parameters = bonds[index].parameters;
}

void CustomBondForce::setBondParameters(int index, int particle1, int particle2, const vector<double>& parameters) {
    ASSERT_VALID_INDEX(index, bonds);
    bonds[index].parameters = parameters;
    bonds[index].particle1 = particle1;
    bonds[index].particle2 = particle2;
}

ForceImpl* CustomBondForce::createImpl() {
    return new CustomBondForceImpl(*this);
}