friction.cpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code 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.
 *
 * Antkeeper source code 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 Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <engine/physics/kinematics/friction.hpp>
#include <algorithm>
 
namespace physics {
 
float combine_friction(float a, float b, friction_combine_mode mode) noexcept
{
    switch (mode)
    {
        case friction_combine_mode::average:
            return (a + b) * 0.5f;
        
        case friction_combine_mode::minimum:
            return std::min(a, b);
        
        case friction_combine_mode::multiply:
            return a * b;
        
        case friction_combine_mode::maximum:
            return std::max(a, b);
        
        default:
            break;
    }
    
    return 0.0f;
}
 
} // namespace physics