stella.adapter

Class BeamSplitterGuider.GuiderLoop

java.lang.Object

java.util.TimerTask

stella.adapter.BeamSplitterGuider.GuiderLoop

All Implemented Interfaces:

Runnable

Enclosing class:

BeamSplitterGuider

private class BeamSplitterGuider.GuiderLoop
extends TimerTask

The timer task that does the actual guiding. If the guider mode was automatic, we are allowed to send back guider-mode change request, which are normal error events. The master mind will as a response stop the guiding in the master mind, thus we do not stop the guiding in this case.

Field Summary

Fields

Modifier and Type	Field and Description
private long	lastsent The time of the last PID query.
private long	start The starting time of the guider loop.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GuiderLoop() Start a new guider loop and records the start time.

Method Summary

Modifier and Type	Method and Description
private Vector2D	averageAzAltShift(List shifts) Averages a list of az/alt offsets stored as two-dimensional vectors.
private boolean	check(Value v, double above) Check, if the value is non-null, its value is non-null and if this value is higher than the supplied double.
void	run() First, check if we are running.
private void	writeRecord(DataOutputStream record, double az, double alt) If the record file is non null, write the two doubles as floats into it.

Methods inherited from class java.util.TimerTask

cancel, scheduledExecutionTime

Methods inherited from class java.lang.Object

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

Field Detail

start

private long start

The starting time of the guider loop.

lastsent

private long lastsent

The time of the last PID query.

Constructor Detail

GuiderLoop

protected GuiderLoop()

Start a new guider loop and records the start time.

Method Detail

run

public void run()

First, check if we are running. In that case exit immediately. Otherwise take a guider frame, interpret it and apply an offset.

Specified by:

run in interface Runnable

Specified by:

run in class TimerTask

check

private final boolean check(Value v,
                            double above)

Check, if the value is non-null, its value is non-null and if this value is higher than the supplied double.

averageAzAltShift

private Vector2D averageAzAltShift(List shifts)

Averages a list of az/alt offsets stored as two-dimensional vectors.

writeRecord

private void writeRecord(DataOutputStream record,
                         double az,
                         double alt)

If the record file is non null, write the two doubles as floats into it.