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/***************************************************************************
* Copyright (C) 2005-2013 by the FIFE team *
* http://www.fifengine.net *
* This file is part of FIFE. *
* *
* FIFE is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
// Standard C++ library includes
#include <algorithm>
#include <cassert>
// 3rd party library includes
#include <SDL.h>
// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/log/logger.h"
#include "timeevent.h"
#include "timemanager.h"
namespace FIFE {
static const uint32_t UNDEFINED_TIME_DELTA = 999999;
static Logger _log(LM_UTIL);
TimeManager::TimeManager():
m_current_time (0),
m_time_delta(UNDEFINED_TIME_DELTA),
m_average_frame_time(0) {
}
TimeManager::~TimeManager() {
}
void TimeManager::update() {
// if first update...
double avg_multiplier = 0.985;
if (m_current_time == 0) {
m_current_time = SDL_GetTicks();
avg_multiplier = 0;
m_time_delta = 0;
} else {
m_time_delta = m_current_time;
m_current_time = SDL_GetTicks();
m_time_delta = m_current_time - m_time_delta;
}
m_average_frame_time = m_average_frame_time * avg_multiplier +
double(m_time_delta) * (1.0 - avg_multiplier);
// Update live events.
//
// It is very important to NOT use iterators (over a vector)
// here, as an event might add enough events to resize the vector.
// -> Ugly segfault
for (size_t i = 0; i < m_events_list.size(); ++i) {
TimeEvent* event = m_events_list[ i ];
if( event ) {
event->managerUpdateEvent(m_current_time);
}
}
// Remove dead events
std::vector<TimeEvent*>::iterator it;
it = std::remove( m_events_list.begin(), m_events_list.end(), static_cast<TimeEvent*>(0));
m_events_list.erase( it, m_events_list.end());
}
void TimeManager::registerEvent(TimeEvent* event) {
// Register.
m_events_list.push_back(event);
}
void TimeManager::unregisterEvent(TimeEvent* event) {
// Unregister.
for (size_t i = 0; i < m_events_list.size(); ++i) {
TimeEvent*& event_i = m_events_list[ i ];
if( event_i == event) {
event_i = 0;
return;
}
}
}
uint32_t TimeManager::getTime() const {
return m_current_time;
}
uint32_t TimeManager::getTimeDelta() const {
return m_time_delta;
}
double TimeManager::getAverageFrameTime() const {
return m_average_frame_time;
}
void TimeManager::printStatistics() const {
FL_LOG(_log, LMsg("Timers: ") << m_events_list.size());
}
} //FIFE
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