00001 //------------------------------------------------------------------------------ 00002 // Lamp : Open source game middleware 00003 // Copyright (C) 2004 Junpei Ohtani ( Email : junpee@users.sourceforge.jp ) 00004 // 00005 // This library is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU Lesser General Public 00007 // License as published by the Free Software Foundation; either 00008 // version 2.1 of the License, or (at your option) any later version. 00009 // 00010 // This library is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // Lesser General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU Lesser General Public 00016 // License along with this library; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 //------------------------------------------------------------------------------ 00019 00020 /** @file 00021 * タイマ実装 00022 * @author Junpee 00023 */ 00024 00025 #include <windows.h> 00026 #include "LampBasic.h" 00027 #include "Core/Utility/Timer.h" 00028 #include "Core/Debug/ErrorOutput.h" 00029 00030 namespace Lamp{ 00031 00032 // 1msあたりのクロック数 00033 float Timer::tickPerMillisecond_ = 0.f; 00034 00035 // 初期化済みフラグ 00036 bool Timer::initialized_ = false; 00037 00038 //------------------------------------------------------------------------------ 00039 // 初期化 00040 void Timer::initialize(){ 00041 if(initialized_){ return; } 00042 Tick frequencyValue; 00043 BOOL success = QueryPerformanceFrequency((LARGE_INTEGER*)&frequencyValue); 00044 if(success){ 00045 tickPerMillisecond_ = (float)(frequencyValue.tick / 1000.f); 00046 }else{ 00047 ErrorOut("高精度タイマの初期化に失敗しました。"); 00048 return; 00049 } 00050 initialized_ = true; 00051 } 00052 //------------------------------------------------------------------------------ 00053 // 時間の取得 00054 Timer::Tick Timer::getTick(){ 00055 Tick tick; 00056 QueryPerformanceCounter((LARGE_INTEGER*)&tick); 00057 return tick; 00058 } 00059 //------------------------------------------------------------------------------ 00060 // 時間間隔の取得 00061 float Timer::getInterval(const Tick& previousTick){ 00062 Tick nowTick = getTick(); 00063 return (nowTick.tick - previousTick.tick) / tickPerMillisecond_; 00064 } 00065 //------------------------------------------------------------------------------ 00066 // 時間間隔の取得 00067 float Timer::getInterval(const Tick& previousTick, const Tick& afterTick){ 00068 return (afterTick.tick - previousTick.tick) / tickPerMillisecond_; 00069 } 00070 //------------------------------------------------------------------------------ 00071 } // End of namespace Lamp 00072 //------------------------------------------------------------------------------