Load.h

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/*******************************************************************************
 * Copyright (C) 2017-2026 Theodore Chang
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
#ifndef LOAD_H
#define LOAD_H
 
#include <Domain/ConditionalModifier.h>
 
class Load : public ConditionalModifier {
    static double multiplier;
 
protected:
    const double magnitude;
 
    vec trial_load;
    vec trial_settlement;
    sp_vec reference_load;
 
    friend void set_load_multiplier(double);
 
public:
    Load(
        unsigned,                 // tag
        unsigned,                 // amplitude tag
        std::vector<Node::DOF>&&, // dof order
        std::vector<Node::DOF>&&, // dof component (unordered)
        double                    // nominal magnitude
    );
 
    [[nodiscard]] virtual bool if_displacement_control() const { return false; }
 
    [[nodiscard]] const vec& get_trial_load() const;
    [[nodiscard]] const vec& get_trial_settlement() const;
    [[nodiscard]] const sp_vec& get_reference_load() const;
};
 
void set_load_multiplier(double);
 
#endif