snowballs2/client/src/game_time.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This source file has been modified by the following contributors:
   5 // Copyright (C) 2013  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
   6 //
   7 // This program is free software: you can redistribute it and/or modify
   8 // it under the terms of the GNU Affero General Public License as
   9 // published by the Free Software Foundation, either version 3 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU Affero General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU Affero General Public License
  18 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 #include <nel/misc/types_nl.h>
  21 #include "game_time.h"
  22
  23 // STL includes
  24
  25 // NeL includes
  26 // #include <nel/misc/debug.h>
  27 #include <nel/misc/value_smoother.h>
  28 #include <nel/misc/config_file.h>
  29 #include <nel/misc/time_nl.h>
  30
  31 // Project includes
  32 #include "snowballs_client.h"
  33 #include "configuration.h"
  34
  35 using namespace std;
  36 using namespace NLMISC;
  37 using namespace NL3D;
  38
  39 namespace SBCLIENT {
  40
  41 // impl note: at some point animation time can be linked to server as well
  42 // see version of time.cpp in snowballs5 experimental code
  43
  44 static bool _SkipAnimationOnce;
  45 static NLMISC::TTime _TimeMs;
  46 static CValueSmootherTemplate<float> _FpsSmoother;
  47
  48 namespace
  49 {
  50
  51 NLMISC::TLocalTime a_LocalTimeDelta;
  52 NL3D::TGlobalAnimationTime a_AnimationTimeDelta;
  53
  54 } /* anonymous namespace */
  55
  56 static void cbFpsSmoothing(CConfigFile::CVar &var)
  57 {
  58         _FpsSmoother.init((uint)var.asInt());
  59 }
  60
  61 void CGameTime::init()
  62 {
  63         _SkipAnimationOnce = true; // since we're loading ... ;)
  64         _TimeMs = NLMISC::CTime::getLocalTime();
  65         LocalTime = ((TLocalTime)_TimeMs) / 1000.0;
  66         LocalTimeDelta = 0.0;
  67         a_LocalTimeDelta = 0.0;
  68         AnimationTime = 0.0;
  69         AnimationTimeDelta = 0.f;
  70         a_AnimationTimeDelta = 0.0;
  71         FramesPerSecond = 0.f;
  72         FramesPerSecondSmooth = 0.f;
  73         CConfiguration::setAndCallback("FpsSmoothing", cbFpsSmoothing);
  74 }
  75
  76 void CGameTime::release()
  77 {
  78         // could also call init again here just for fun but nothing useful otherwise
  79         CConfiguration::dropCallback("FpsSmoothing");
  80         _FpsSmoother.reset();
  81 }
  82
  83 void CGameTime::updateTime()
  84 {
  85         TTime timems = NLMISC::CTime::getLocalTime();
  86         TTime deltams = timems - _TimeMs;
  87         _TimeMs = timems;
  88
  89         if (!deltams) // time has not moved
  90         {
  91                 // average of previous fps and this fps should be ok
  92                 FramesPerSecond *= 3;
  93
  94                 a_LocalTimeDelta = 0.f;
  95                 a_AnimationTimeDelta = 0.f;
  96         }
  97         else
  98         {
  99                 FramesPerSecond = 1000.0f / (float)deltams;
 100
 101                 TLocalTime localTime = ((TLocalTime)timems) / 1000.0;
 102                 a_LocalTimeDelta = localTime - LocalTime;
 103
 104                 if (_SkipAnimationOnce)
 105                 {
 106                         a_AnimationTimeDelta = 0.f;
 107                         _SkipAnimationOnce = false;
 108                 }
 109                 else
 110                 {
 111                         a_AnimationTimeDelta = (TGlobalAnimationTime)a_LocalTimeDelta;
 112                 }
 113         }
 114
 115         _FpsSmoother.addValue(FramesPerSecond);
 116         FramesPerSecondSmooth = _FpsSmoother.getSmoothValue();
 117 }
 118
 119 void CGameTime::advanceTime(double f)
 120 {
 121         LocalTimeDelta = a_LocalTimeDelta * f;
 122         LocalTime += LocalTimeDelta;
 123         TGlobalAnimationTime atd = a_AnimationTimeDelta * f;
 124         AnimationTimeDelta = (NL3D::TAnimationTime)atd;
 125         AnimationTime += atd;
 126 }
 127
 128 void CGameTime::skipAnimationOnce()
 129 {
 130         _SkipAnimationOnce = true;
 131 }
 132
 133 } /* namespace SBCLIENT */
 134
 135 /* end of file */