Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/math/L1Comparator.java @ 798:6cff63d0c434

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Fixed vim modeline. Added some Javadoc. gnv-artifacts/trunk@880 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 06 Apr 2010 11:05:00 +0000
parents b1f5f2a8840f
children bb7afd783321
rev   line source
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1 package de.intevation.gnv.math;
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2
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b1f5f2a8840f Ordered imports. Removed needless imports. Removed empty headers.
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3 import com.vividsolutions.jts.geom.Coordinate;
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4
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5 import java.util.Comparator;
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6
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7 /**
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8 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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9 */
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10 public class L1Comparator
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11 implements Comparator
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12 {
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13 private Coordinate ref;
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14
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15 public L1Comparator() {
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16 }
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17
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18 public L1Comparator(Coordinate ref) {
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19 this.ref = ref;
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20 }
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21
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22 public void setReference(Coordinate ref) {
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23 this.ref = ref;
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24 }
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25
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26 public int compare(Object a, Object b) {
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27 Coordinate pa = (Coordinate)a;
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28 Coordinate pb = (Coordinate)b;
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29 double da = L1(ref, pa);
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30 double db = L1(ref, pb);
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31 if (da < db) return -1;
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32 if (da > db) return +1;
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33 return 0;
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34 }
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35
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36 public static double L1(Coordinate a, Coordinate b) {
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37 return Math.abs(a.x - b.x) + Math.abs(a.y - b.y);
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38 }
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39
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40 }
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41 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org