Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/utils/DoubleUtil.java @ 1190:f514894ec2fd
merged flys-artifacts/2.5
author | Thomas Arendsen Hein <thomas@intevation.de> |
---|---|
date | Fri, 28 Sep 2012 12:14:17 +0200 |
parents | 913b52064449 |
children | 09c1292cf36d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/DoubleUtil.java Fri Sep 28 12:14:17 2012 +0200 @@ -0,0 +1,48 @@ +package de.intevation.flys.utils; + +public class DoubleUtil +{ + public static final double DEFAULT_STEP_PRECISION = 1e6; + + private DoubleUtil() { + } + + public static final double [] explode(double from, double to, double step) { + return explode(from, to, step, DEFAULT_STEP_PRECISION); + } + + public static final double round(double x, double precision) { + return Math.round(x * precision)/precision; + } + + public static final double round(double x) { + return Math.round(x * DEFAULT_STEP_PRECISION)/DEFAULT_STEP_PRECISION; + } + + public static final double [] explode( + double from, + double to, + double step, + double precision + ) { + double lower = from; + + double diff = to - from; + double tmp = diff / step; + int num = (int)Math.abs(Math.ceil(tmp)) + 1; + + double [] values = new double[num]; + + if (from > to) { + step = -step; + } + + for (int idx = 0; idx < num; idx++) { + values[idx] = round(lower, precision); + lower += step; + } + + return values; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :