com.threerings.tudey.client.util
Class TimeSmoother

java.lang.Object
  com.threerings.tudey.client.util.TimeSmoother

public class TimeSmoother
extends Object

Provides a continuous estimate of the current time (with millisecond precision) based on a series of discrete time updates, speeding up or slowing down (but never reversing) the local clock as necessary to stay in synch.

Field Summary

protected long	_delta The current estimated difference between the tracked time and the timer time.
protected long	_dstamp The timestamp of the current delta value.
protected long	_tdelta The target delta.
protected static float	CONVERGENCE_RATE The exponential rate at which we approach our target delta.

Constructor Summary

TimeSmoother(int time)
Creates a new smoother with the given initial clock value.

Method Summary

int	getTime() Returns the current smoothed time estimate.
void	update(int time) Updates the smoother with the current value of the clock being tracked.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_delta

protected long _delta

The current estimated difference between the tracked time and the timer time.

_tdelta

protected long _tdelta

The target delta.

_dstamp

protected long _dstamp

The timestamp of the current delta value.

CONVERGENCE_RATE

protected static final float CONVERGENCE_RATE

The exponential rate at which we approach our target delta.

Constructor Detail

TimeSmoother

public TimeSmoother(int time)

Creates a new smoother with the given initial clock value.

Method Detail

update

public void update(int time)

Updates the smoother with the current value of the clock being tracked.

getTime

public int getTime()

Returns the current smoothed time estimate.