ryzom/client/src/scalable_time.cpp

   1 // Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License, or (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17
  18
  19 #include "stdpch.h"
  20 #include "scalable_time.h"
  21 #include "time_client.h"
  22 #include "nel/misc/time_nl.h"
  23
  24 #ifdef DEBUG_NEW
  25 #define new DEBUG_NEW
  26 #endif
  27
  28 // *************************************************************************************************
  29 CScalableTime::CScalableTime()
  30 {
  31         _LastPerformanceTime = NLMISC::CTime::getPerformanceTime();
  32         _ScaledPerformanceTime = (double) _LastPerformanceTime;
  33         _TimeScale = 1.f;
  34 }
  35
  36 // *************************************************************************************************
  37 TTime CScalableTime::getScaledLocalTime()
  38 {
  39         update();
  40         return (TTime) (NLMISC::CTime::ticksToSecond ((NLMISC::TTicks) _ScaledPerformanceTime) * 1000.0);
  41 }
  42
  43 // *************************************************************************************************
  44 NLMISC::TTicks CScalableTime::getScaledPerformanceTime()
  45 {
  46         update();
  47         return (NLMISC::TTicks) _ScaledPerformanceTime;
  48 }
  49
  50 // *************************************************************************************************
  51 void CScalableTime::setTimeScale(float scale)
  52 {
  53         _TimeScale = std::max(0.f, scale);
  54 }
  55
  56 // *************************************************************************************************
  57 void CScalableTime::update()
  58 {
  59         NLMISC::TTicks dt = NLMISC::CTime::getPerformanceTime() - _LastPerformanceTime;
  60         _LastPerformanceTime = NLMISC::CTime::getPerformanceTime();
  61         _ScaledPerformanceTime += (double) dt * (double) _TimeScale;
  62 }