net_energy_models.h

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// SPDX-FileCopyrightText: 2020 W. Traylor <wolfgang.traylor@senckenberg.de>
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#ifndef FAUNA_NET_ENERGY_MODELS_H
#define FAUNA_NET_ENERGY_MODELS_H
 
#include "forage_values.h"
 
namespace Fauna {
 
 
inline ForageEnergyContent get_net_energy_from_gross_energy(
    const ForageEnergyContent& ge_content, const Digestibility& digestibility,
    const double me_coefficient, const double k_maintenance) {
  if (me_coefficient <= 0.0 || me_coefficient >= 1.0)
    throw std::invalid_argument(
        "Fauna::get_net_energy_from_gross_energy(): "
        "Parameter `me_coefficient` is not in interval (0,1).");
  if (k_maintenance <= 0.0 || k_maintenance >= 1.0)
    throw std::invalid_argument(
        "Fauna::get_net_energy_from_gross_energy(): "
        "Parameter `k_maintenance` is not in interval (0,1).");
  return ge_content * digestibility * (me_coefficient * k_maintenance);
}
}  // namespace Fauna
 
#endif  // FAUNA_NET_ENERGY_MODELS_H