Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/math/L1Comparator.java @ 657:af3f56758f59
merged gnv-artifacts/0.5
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:53 +0200 |
| parents | ab29e4ff2fda |
| children | b1f5f2a8840f |
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| 590:5f5f273c8566 | 657:af3f56758f59 |
|---|---|
| 1 package de.intevation.gnv.math; | |
| 2 | |
| 3 import java.util.Comparator; | |
| 4 | |
| 5 import com.vividsolutions.jts.geom.Coordinate; | |
| 6 | |
| 7 /** | |
| 8 * @author Sascha L. Teichmann | |
| 9 */ | |
| 10 public class L1Comparator | |
| 11 implements Comparator | |
| 12 { | |
| 13 private Coordinate ref; | |
| 14 | |
| 15 public L1Comparator() { | |
| 16 } | |
| 17 | |
| 18 public L1Comparator(Coordinate ref) { | |
| 19 this.ref = ref; | |
| 20 } | |
| 21 | |
| 22 public void setReference(Coordinate ref) { | |
| 23 this.ref = ref; | |
| 24 } | |
| 25 | |
| 26 public int compare(Object a, Object b) { | |
| 27 Coordinate pa = (Coordinate)a; | |
| 28 Coordinate pb = (Coordinate)b; | |
| 29 double da = Point2d.L1(ref, pa); | |
| 30 double db = Point2d.L1(ref, pb); | |
| 31 if (da < db) return -1; | |
| 32 if (da > db) return +1; | |
| 33 return 0; | |
| 34 } | |
| 35 } | |
| 36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: | |
| 37 |