nClientLag Class Reference

lag tracker on client More...

List of all members.

Public Member Functions
	nClientLag ()
REAL	SmoothLag ()
void	ReportLag (REAL lag, REAL weight)
void	Timestep (REAL dt)
Private Attributes
REAL	lagLast_
	the last time a serious lag report came in
REAL	lagSlow_
	most accurate estimate of lag
REAL	lagFast_
	faster adapting, but less accurate estimate of lag
REAL	smoothLag_
	smoothed estimate of lag

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Detailed Description

lag tracker on client

Definition at line 54 of file eLagCompensation.cpp.

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Constructor & Destructor Documentation

nClientLag::nClientLag

(

)

[inline]

Definition at line 56 of file eLagCompensation.cpp.

:lagLast_(0), lagSlow_(0), lagFast_(0), smoothLag_(0) {}

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Member Function Documentation

REAL nClientLag::SmoothLag

(

)

[inline]

Definition at line 58 of file eLagCompensation.cpp.

References smoothLag_.

Referenced by eLag::Current().

{ return smoothLag_; }

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void nClientLag::ReportLag	(	REAL	lag,
		REAL	weight
	)			[inline]

Definition at line 60 of file eLagCompensation.cpp.

References con, lagFast_, lagLast_, lagSlow_, REAL, se_lagFastWeight, se_lagSlowWeight, smoothLag_, and tSysTimeFloat().

Referenced by se_receiveLagMessage().

    {
#ifdef DEBUG
        con << "Received message of " << lag << " seconds of lag, weight " << weight << "\n";
#endif

        // memorize the time of serious reports
        if ( weight > 1 )
            lagLast_ = tSysTimeFloat();

        REAL slowWeight = weight * se_lagSlowWeight;
        slowWeight = slowWeight > 1 ? 1 : slowWeight;
        REAL fastWeight = weight * se_lagFastWeight;
        fastWeight = fastWeight > 1 ? 1 : fastWeight;

        lagFast_ = smoothLag_ + lag * fastWeight;
        lagSlow_ = ( smoothLag_ > lagSlow_ ? lagSlow_ : smoothLag_ ) + lag * slowWeight;
    }

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void nClientLag::Timestep

(

REAL

dt

)

[inline]

Definition at line 79 of file eLagCompensation.cpp.

References lagFast_, lagLast_, lagSlow_, REAL, se_lagFastDecayTime, se_lagSlowDecayTime, se_maxLagSpeedup, smoothLag_, and tSysTimeFloat().

Referenced by eLag::Timestep().

    {
        if ( dt > .5 )
            dt = .5;

        // increase smooth lag
        REAL speedup = se_maxLagSpeedup * dt;
        smoothLag_ += speedup;

        // clamp fast lag with slow lag
        if ( lagFast_ < lagSlow_ )
            lagFast_ = lagSlow_;

        // clam smooth lag with fast lag
        if (  smoothLag_ > lagFast_ )
            smoothLag_ = lagFast_;

        // the last serious lag report came from this many seconds ago
        REAL lastLag = tSysTimeFloat() - lagLast_;

        // let regular lag decay
        if ( lastLag > se_lagSlowDecayTime )
            lagSlow_ *= se_lagSlowDecayTime/( se_lagSlowDecayTime + dt );
        if ( lastLag > se_lagFastDecayTime )
            lagFast_ *= se_lagFastDecayTime/( se_lagFastDecayTime + dt );
    }

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Member Data Documentation

REAL nClientLag::lagLast_ [private]

the last time a serious lag report came in

Definition at line 106 of file eLagCompensation.cpp.

Referenced by ReportLag(), and Timestep().

REAL nClientLag::lagSlow_ [private]

most accurate estimate of lag

Definition at line 107 of file eLagCompensation.cpp.

Referenced by ReportLag(), and Timestep().

REAL nClientLag::lagFast_ [private]

faster adapting, but less accurate estimate of lag

Definition at line 108 of file eLagCompensation.cpp.

Referenced by ReportLag(), and Timestep().

REAL nClientLag::smoothLag_ [private]

smoothed estimate of lag

Definition at line 109 of file eLagCompensation.cpp.

Referenced by ReportLag(), SmoothLag(), and Timestep().

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The documentation for this class was generated from the following file:

• src/engine/eLagCompensation.cpp

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