lejos.robotics.filter

Class SumFilter.SmartSum

java.lang.Object

lejos.robotics.filter.AbstractFilter

lejos.robotics.filter.SampleBuffer

lejos.robotics.filter.SumFilter.SmartSum

All Implemented Interfaces:

SampleProvider

Enclosing class:

SumFilter

private class SumFilter.SmartSum
extends SampleBuffer

Calculates the sum by maintaining a sum by substracting old samples and adding new samples;

Field Summary

Fields

Modifier and Type	Field and Description
(package private) float[]	latest
(package private) int[]	notRecalculated
(package private) float[]	oldest
(package private) int	recalculateIn
(package private) float[]	sum

Fields inherited from class lejos.robotics.filter.SampleBuffer

actualSize, bufferSize, currentPos, sampleBuffer

Fields inherited from class lejos.robotics.filter.AbstractFilter

sampleSize, source

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SmartSum(SampleProvider source, int length)

Method Summary

Modifier and Type	Method and Description
void	fetchSample(float[] sample, int off) Fetches a sample from a sensor or filter.
private float	recalculateSum(int index)

Methods inherited from class lejos.robotics.filter.SampleBuffer

getActualSize, getBufferSize, getOldest, toPos

Methods inherited from class lejos.robotics.filter.AbstractFilter

sampleSize

Methods inherited from class java.lang.Object

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

Field Detail

sum

float[] sum

oldest

float[] oldest

latest

float[] latest

notRecalculated

int[] notRecalculated

recalculateIn

int recalculateIn

Constructor Detail

SmartSum

private SmartSum(SampleProvider source,
                 int length)

Method Detail

fetchSample

public void fetchSample(float[] sample,
                        int off)

Description copied from interface: SampleProvider

Fetches a sample from a sensor or filter.

Specified by:

fetchSample in interface SampleProvider

Overrides:

fetchSample in class SampleBuffer

Parameters:

sample - The array to store the sample in.

off - The elements of the sample are stored in the array starting at the offset position.

recalculateSum

private float recalculateSum(int index)