Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3105:9592b7d76633
Generate fake data for SQ curves; Implemented the Facet and Generator stuff.
flys-artifacts/trunk@4704 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 19 Jun 2012 13:55:14 +0000 |
parents | 4bd3d8bbb60c |
children | 63ef889eea2b |
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--- a/flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java Tue Jun 19 13:20:03 2012 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java Tue Jun 19 13:55:14 2012 +0000 @@ -5,9 +5,14 @@ import java.util.Iterator; +import org.w3c.dom.Document; + import org.jfree.chart.entity.ChartEntity; import org.jfree.chart.entity.EntityCollection; +import org.jfree.data.function.Function2D; + + public class JFreeUtil { /** Do not instantiate. */ @@ -45,5 +50,26 @@ return false; } + + + public static StyledXYSeries sampleFunction2D( + Function2D func, + Document theme, + String seriesKey, + int samples, + double start, + double end + ) { + StyledXYSeries series = new StyledXYSeries(seriesKey, theme); + + double step = (end - start) / (samples - 1); + + for (int i = 0; i < samples; i++) { + double x = start + (step * i); + series.add(x, func.getValue(x)); + } + + return series; + } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :