Package de.gsi.chart.renderer

Interface RendererDataReducer

All Known Implementing Classes:

DefaultDataReducer, MaxDataReducer, RamanDouglasPeukerDataReducer

public interface RendererDataReducer

Author:

rstein N.B. in-place computation have to be assumed (ie. the reduced data set is part and overwrites of the input arrays)

Method Summary

Modifier and Type	Method	Description
int	reducePoints(double[] xValues, double[] yValues, double[] xPointErrorsPos, double[] xPointErrorsNeg, double[] yPointErrorsPos, double[] yPointErrorsNeg, java.lang.String[] styles, boolean[] pointSelected, int indexMin, int indexMax)	Internal function to the ErrorDataSetRenderer arrays are cached copies and operations are assumed to be performed in-place (<-> for performance reasons/minimisation of memory allocation)

Method Detail

reducePoints

int reducePoints(double[] xValues,
                 double[] yValues,
                 double[] xPointErrorsPos,
                 double[] xPointErrorsNeg,
                 double[] yPointErrorsPos,
                 double[] yPointErrorsNeg,
                 java.lang.String[] styles,
                 boolean[] pointSelected,
                 int indexMin,
                 int indexMax)

Internal function to the ErrorDataSetRenderer arrays are cached copies and operations are assumed to be performed in-place (<-> for performance reasons/minimisation of memory allocation)

Parameters:

xValues - array of x coordinates

yValues - array of y coordinates

xPointErrorsPos - array of coordinates containing x+exp

xPointErrorsNeg - array of coordinates containing x-exn

yPointErrorsPos - array of coordinates containing x+eyp

yPointErrorsNeg - array of coordinates containing x+eyn

styles - point styles

pointSelected - array containing the points that have been specially selected by the user

indexMin - minimum index of those array that shall be considered

indexMax - maximum index of those array that shall be considered

Returns:

effective number of points that remain after the reduction