FIFE
2008.0
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00001 /*************************************************************************** 00002 * Copyright (C) 2005-2008 by the FIFE team * 00003 * http://www.fifengine.de * 00004 * This file is part of FIFE. * 00005 * * 00006 * FIFE is free software; you can redistribute it and/or * 00007 * modify it under the terms of the GNU Lesser General Public * 00008 * License as published by the Free Software Foundation; either * 00009 * version 2.1 of the License, or (at your option) any later version. * 00010 * * 00011 * This library is distributed in the hope that it will be useful, * 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00014 * Lesser General Public License for more details. * 00015 * * 00016 * You should have received a copy of the GNU Lesser General Public * 00017 * License along with this library; if not, write to the * 00018 * Free Software Foundation, Inc., * 00019 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * 00020 ***************************************************************************/ 00021 00022 // Standard C++ library includes 00023 00024 // 3rd party library includes 00025 00026 // FIFE includes 00027 // These includes are split up in two parts, separated by one empty line 00028 // First block: files included from the FIFE root src directory 00029 // Second block: files included from the same folder 00030 #include "util/base/exception.h" 00031 #include "util/time/timemanager.h" 00032 00033 #include "timeprovider.h" 00034 00035 namespace FIFE { 00036 TimeProvider::TimeProvider(TimeProvider* master): 00037 m_master(master), 00038 m_multiplier(1.0) { 00039 m_time_static = m_time_scaled = master ? master->getGameTime() : TimeManager::instance()->getTime(); 00040 } 00041 00042 TimeProvider::~TimeProvider() {} 00043 00044 void TimeProvider::setMultiplier(float multiplier) { 00045 if (multiplier < 0.0) { 00046 throw NotSupported("Negative time multiplier are not supported"); 00047 } 00048 m_time_static = getPreciseGameTime(); 00049 m_time_scaled = m_master ? m_master->getPreciseGameTime() : static_cast<float>(TimeManager::instance()->getTime()); 00050 m_multiplier = multiplier; 00051 } 00052 00053 float TimeProvider::getMultiplier() const { 00054 return m_multiplier; 00055 } 00056 00057 float TimeProvider::getTotalMultiplier() const { 00058 if (m_master) { 00059 return m_master->getTotalMultiplier() * m_multiplier; 00060 } else { 00061 return m_multiplier; 00062 } 00063 } 00064 00065 unsigned int TimeProvider::getGameTime() const { 00066 return static_cast<unsigned int>(getPreciseGameTime()); 00067 } 00068 00069 double TimeProvider::getPreciseGameTime() const { 00070 return m_time_static + m_multiplier * ((m_master ? m_master->getPreciseGameTime() : static_cast<float>(TimeManager::instance()->getTime())) - m_time_scaled); 00071 } 00072 00073 unsigned int scaleTime(float multiplier, unsigned int ticks) { 00074 return static_cast<unsigned int>(static_cast<float>(ticks) * multiplier); 00075 } 00076 }