diff options
author | Hans Lambermont <hans@lambermont.dyndns.org> | 2002-10-12 15:37:38 +0400 |
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committer | Hans Lambermont <hans@lambermont.dyndns.org> | 2002-10-12 15:37:38 +0400 |
commit | 12315f4d0e0ae993805f141f64cb8c73c5297311 (patch) | |
tree | 59b45827cd8293cfb727758989c7a74b40183974 /source/gameengine/GamePlayer/common/windows/GPW_System.cpp |
Initial revisionv2.25
Diffstat (limited to 'source/gameengine/GamePlayer/common/windows/GPW_System.cpp')
-rw-r--r-- | source/gameengine/GamePlayer/common/windows/GPW_System.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/source/gameengine/GamePlayer/common/windows/GPW_System.cpp b/source/gameengine/GamePlayer/common/windows/GPW_System.cpp new file mode 100644 index 00000000000..ba71e036fc4 --- /dev/null +++ b/source/gameengine/GamePlayer/common/windows/GPW_System.cpp @@ -0,0 +1,93 @@ +/** + * $Id$ + * + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * This program 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 2 + * of the License, or (at your option) any later version. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * This program 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 this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** + * Timing routine taken and modified from KX_BlenderSystem.cpp + */ + +#include <windows.h> + +#include "GPW_System.h" + + +GPW_System::GPW_System(void) +{ + m_freq = 0; + m_lastCount = 0; + m_lastRest = 0; + m_lastTime = 0; +} + + +double GPW_System::GetTimeInSeconds() +{ +#if 0 + double secs = ::GetTickCount(); + secs /= 1000.; + return secs; +#else + + // 03/20/1999 Thomas Hieber: completely redone to get true Millisecond + // accuracy instead of very rough ticks. This routine will also provide + // correct wrap around at the end of "long" + + // m_freq was set to -1, if the current Hardware does not support + // high resolution timers. We will use GetTickCount instead then. + if (m_freq < 0) { + return ::GetTickCount(); + } + + // m_freq is 0, the first time this function is being called. + if (m_freq == 0) { + // Try to determine the frequency of the high resulution timer + if (!::QueryPerformanceFrequency((LARGE_INTEGER*)&m_freq)) { + // There is no such timer.... + m_freq = -1; + return 0; + } + } + + // Retrieve current count + __int64 count = 0; + ::QueryPerformanceCounter((LARGE_INTEGER*)&count); + + // Calculate the time passed since last call, and add the rest of + // those tics that didn't make it into the last reported time. + __int64 delta = 1000*(count-m_lastCount) + m_lastRest; + + m_lastTime += (long)(delta/m_freq); // Save the new value + m_lastRest = delta%m_freq; // Save those ticks not being counted + m_lastCount = count; // Save last count + + // Return a high quality measurement of time + return m_lastTime/1000.0; +#endif +} + + |