action.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/input/action.hpp>
 
namespace input {
 
namespace {
 
inline bool default_threshold_function(float x) noexcept
{
    return x > 0.0f;
}
 
} // namespace
 
action::action():
    m_threshold_function(default_threshold_function)
{}
 
void action::evaluate(float value)
{
    // Update input value
    m_active_event.input_value = value;
    
    // Store activation state
    const bool was_active = m_active;
    
    // Re-evaluate activation state
    m_active = m_threshold_function(value);
    
    if (m_active)
    {
        if (!was_active)
        {
            // Publish activated event
            m_activated_publisher.publish(m_activated_event);
        }
    }
    else
    {
        if (was_active)
        {
            // Publish deactivated event
            m_deactivated_publisher.publish(m_deactivated_event);
        }
    }
}
 
void action::update() const
{
    if (m_active)
    {
        // Publish active event
        m_active_publisher.publish(m_active_event);
    }
}
 
void action::reset() noexcept
{
    m_active = false;
    m_active_event.input_value = 0.0f;
}
 
} // namespace input