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2023-08-07 19:29:24 +08:00
commit 34d6c5d489
4832 changed files with 1389451 additions and 0 deletions
--- a/CrySystem/Timer.h
+++ b/CrySystem/Timer.h
@@ -0,0 +1,210 @@
+
+//////////////////////////////////////////////////////////////////////
+//
+//	Crytek CryENGINE Source code
+//	
+//	File:Timer.h
+//
+//	History:
+//	01/31/2001 Created by Marco Corbetta
+//  08/03/2003 MartinM improved precision (intern from float to int64)
+//
+//////////////////////////////////////////////////////////////////////
+
+#ifndef TIMER_H
+#define TIMER_H
+
+#if _MSC_VER > 1000
+# pragma once
+#endif
+
+
+
+
+//////////////////////////////////////////////////////////////////////
+#include <ITimer.h>						// ITimer
+
+#define FPS_FRAMES 16
+
+/*
+===========================================
+The Timer interface Class
+===========================================
+*/
+
+#define TIME_PROFILE_PARAMS 256
+
+//! Implements all common timing routines
+class CTimer : public ITimer
+{
+public:
+	//! constructor
+	CTimer();
+	//! destructor
+	~CTimer() {};
+
+	//! @name ITimer implementation
+	//@{
+	bool Init( ISystem *pSystem );
+	virtual void Reset();		
+	virtual void Update();
+	virtual void Enable(bool bEnable);
+
+	virtual const CTimeValue GetCurrTimePrecise() const
+	{
+		int64 llNow=(*m_pfnUpdate)()-m_lBaseTime;
+
+		// can be done much better
+		double fac=(double)TIMEVALUE_PRECISION/(double)m_lTicksPerSec;
+
+		return CTimeValue(int64(llNow*fac));
+	}
+
+	//! \return in seconds
+	virtual inline const float GetCurrTime() const 
+	{
+		return m_fCurrTime;
+	}
+	
+//	virtual const CTimeValue GetFrameStart() const;
+
+	virtual inline const float GetAsyncCurTime()  
+	{ 
+		int64 llNow=(*m_pfnUpdate)()-m_lBaseTime;
+		double dVal=(double)llNow;
+		float fRet=(float)(dVal/(double)(m_lTicksPerSec));
+
+		return fRet; 
+	}
+	
+	virtual inline const float GetFrameTime() const 
+	{ 
+		return m_fFrameTime;   
+	} 
+	
+	virtual float	GetFrameRate();
+	virtual float gfGetTime() { return GetAsyncCurTime(); }				// to be removed
+  virtual float MeasureTime(const char* comment);
+	bool GetBasicStats( float & fStatsLogic, float & fStatsRender, float & fStatsSumm );
+	//@}
+private:
+	
+	typedef int64 (*TimeUpdateFunc) ();	//  absolute, in microseconds,
+
+	//! get the timer in microseconds. using QueryPerformanceCounter
+	static int64	GetPerformanceCounterTime();
+	//! get the timer in microseconds. using winmm
+	static int64	GetMMTime();
+	//! updates m_fCurrTime
+	void RefreshCurrTime();
+		
+	TimeUpdateFunc	m_pfnUpdate;								//!< pointer to the timer function (performance counter or timegettime)
+	int64						m_lBaseTime;								//!< absolute in ticks, 1 sec = m_lTicksPerSec units
+	int64						m_lLastTime;								//!< absolute in ticks, 1 sec = m_lTicksPerSec units
+
+	int64						m_lTicksPerSec;							//!< units per sec
+
+	int64						m_lCurrentTime;							//!< absolute, in microseconds, at the CTimer:Update() call
+	float						m_fFrameTime;								//!< in seconds since the last update
+	float						m_fCurrTime;								//!< absolute time in seconds
+	bool						m_bEnabled;									//!<
+
+	// smoothing
+	float						m_previousTimes[FPS_FRAMES];//!<
+	int							m_timecount;								//!<
+
+	//////////////////////////////////////////////////////////////////////////
+	// Console vars.
+	//////////////////////////////////////////////////////////////////////////
+  int							m_e_time_smoothing;					//!< [0..FPS_FRAMES-2] optional smoothing, 0=no, x=x additional steps,  
+  int							m_e_time_profiling;					//!< 
+	float						m_fixed_time_step;					//!< 
+	//////////////////////////////////////////////////////////////////////////
+
+  struct time_info_struct
+  {
+    time_info_struct() { param_name[0]=0; value=0; }
+    char param_name[32];
+    float value;
+  } m_TimeInfoTable[TIME_PROFILE_PARAMS];			//!< this table contain times and code point names
+
+  int							m_nCurProfLine;  						//!< 
+	// todo: change from float to int64
+  float						m_fProfStartTime;						//!< in milliseconds, -1 menst value is not set
+
+	ISystem *				m_pSystem;									//!< 
+	
+	// game/render ratio profiling
+	float						m_fStatsLogic;							//!< 
+	float						m_fStatsRender;							//!< 
+	float						m_fStatsSumm;								//!< 
+  int							m_nCurProfLinesNum;  				//!< 
+};
+
+
+
+
+
+/*
+
+int _tmain(int argc, _TCHAR* argv[])
+{
+	int64 step=1000000;						// 1 sec
+	int64 start=1*1000;						// 1 ms
+
+	step*=3600;											// 1 hour
+
+	for(int64 i=start;;i+=step)		// 1 day step
+	{
+		float f1=(float)(i/1000000.0f);		// convert from microsec to sec
+		float f2=(i/1000)/1000.0f;	// convert from microsec to sec
+
+		printf("f1 sec:%f, hours:%f, days:%f\n",f1,f1/3600.0f,f1/3600.0f/24.0f);
+		printf("f2 sec:%f, hours:%f, days:%f\n",f2,f2/3600.0f,f2/3600.0f/24.0f);
+	}
+	return 0;
+}
+
+Output:
+f1 sec:0.001000, hours:0.000000, days:0.000000
+f2 sec:0.001000, hours:0.000000, days:0.000000
+f1 sec:3600.000977, hours:1.000000, days:0.041667
+f2 sec:3600.000977, hours:1.000000, days:0.041667
+f1 sec:7200.000977, hours:2.000000, days:0.083333
+f2 sec:7200.000977, hours:2.000000, days:0.083333
+f1 sec:10800.000977, hours:3.000000, days:0.125000
+f2 sec:10800.000977, hours:3.000000, days:0.125000
+f1 sec:14400.000977, hours:4.000000, days:0.166667
+f2 sec:14400.000977, hours:4.000000, days:0.166667
+f1 sec:18000.001953, hours:5.000001, days:0.208333
+f2 sec:18000.001953, hours:5.000001, days:0.208333
+f1 sec:21600.001953, hours:6.000001, days:0.250000
+f2 sec:21600.001953, hours:6.000001, days:0.250000
+f1 sec:25200.001953, hours:7.000001, days:0.291667
+f2 sec:25200.001953, hours:7.000001, days:0.291667
+f1 sec:28800.001953, hours:8.000001, days:0.333333
+f2 sec:28800.001953, hours:8.000001, days:0.333333
+f1 sec:32400.001953, hours:9.000001, days:0.375000
+f2 sec:32400.001953, hours:9.000001, days:0.375000
+f1 sec:36000.000000, hours:10.000000, days:0.416667			* at that point we lost the 1ms precision completely
+f2 sec:36000.000000, hours:10.000000, days:0.416667     * f2 is showing the same problem, that means it's not the calculation
+f1 sec:39600.000000, hours:11.000000, days:0.458333       it's the float precision that causes that
+f2 sec:39600.000000, hours:11.000000, days:0.458333
+f1 sec:43200.000000, hours:12.000000, days:0.500000
+f2 sec:43200.000000, hours:12.000000, days:0.500000
+f1 sec:46800.000000, hours:13.000000, days:0.541667
+f2 sec:46800.000000, hours:13.000000, days:0.541667
+f1 sec:50400.000000, hours:14.000000, days:0.583333
+f2 sec:50400.000000, hours:14.000000, days:0.583333
+f1 sec:54000.000000, hours:15.000000, days:0.625000
+f2 sec:54000.000000, hours:15.000000, days:0.625000
+f1 sec:57600.000000, hours:16.000000, days:0.666667
+f2 sec:57600.000000, hours:16.000000, days:0.666667
+f1 sec:61200.000000, hours:17.000000, days:0.708333
+f2 sec:61200.000000, hours:17.000000, days:0.708333
+f1 sec:64800.000000, hours:18.000000, days:0.750000
+f2 sec:64800.000000, hours:18.000000, days:0.750000
+*/
+
+
+#endif //timer