Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/utils/DoubleUtil.java @ 655:913b52064449
Refactored version of "Berechnung 4"
flys-artifacts/trunk@2053 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
---|---|
date | Sun, 05 Jun 2011 18:24:46 +0000 |
parents | |
children | 09c1292cf36d |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/DoubleUtil.java Sun Jun 05 18:24:46 2011 +0000 @@ -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 :