Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/math/Point2d.java @ 540:80630520e25a
merged gnv-artifacts/0.4
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:49 +0200 |
| parents | 422275fc9927 |
| children | b248531fa20b |
comparison
equal
deleted
inserted
replaced
| 415:9f4a0b990d27 | 540:80630520e25a |
|---|---|
| 1 package de.intevation.gnv.math; | |
| 2 | |
| 3 import java.util.Comparator; | |
| 4 | |
| 5 import com.vividsolutions.jts.geom.Envelope; | |
| 6 import com.vividsolutions.jts.geom.Coordinate; | |
| 7 | |
| 8 /** | |
| 9 * @author Sascha L. Teichmann | |
| 10 */ | |
| 11 public class Point2d | |
| 12 extends Coordinate | |
| 13 { | |
| 14 public static final double EPSILON = 1e-3d; | |
| 15 | |
| 16 public static final Comparator X_COMPARATOR = new Comparator() { | |
| 17 public int compare(Object a, Object b) { | |
| 18 double xa = ((Coordinate)a).x; | |
| 19 double xb = ((Coordinate)b).x; | |
| 20 if (xa < xb) return -1; | |
| 21 if (xa > xb) return +1; | |
| 22 return 0; | |
| 23 } | |
| 24 }; | |
| 25 | |
| 26 public static final Comparator Y_COMPARATOR = new Comparator() { | |
| 27 public int compare(Object a, Object b) { | |
| 28 double ya = ((Coordinate)a).y; | |
| 29 double yb = ((Coordinate)b).y; | |
| 30 if (ya < yb) return -1; | |
| 31 if (ya > yb) return +1; | |
| 32 return 0; | |
| 33 } | |
| 34 }; | |
| 35 | |
| 36 public static class InverseL1Comparator | |
| 37 implements Comparator | |
| 38 { | |
| 39 private Point2d ref; | |
| 40 | |
| 41 public InverseL1Comparator(Point2d ref) { | |
| 42 this.ref = ref; | |
| 43 } | |
| 44 | |
| 45 public int compare(Object a, Object b) { | |
| 46 Point2d pa = (Point2d)a; | |
| 47 Point2d pb = (Point2d)b; | |
| 48 double da = ref.L1(pa); | |
| 49 double db = ref.L1(pb); | |
| 50 if (da < db) return -1; | |
| 51 if (da > db) return +1; | |
| 52 return 0; | |
| 53 } | |
| 54 } // class InverseL1Comparator | |
| 55 | |
| 56 public int i; | |
| 57 public int j; | |
| 58 | |
| 59 public Point2d() { | |
| 60 } | |
| 61 | |
| 62 public Point2d(double x, double y, int i, int j) { | |
| 63 super(x, y); | |
| 64 this.i = i; | |
| 65 this.j = j; | |
| 66 } | |
| 67 | |
| 68 public Point2d(double x, double y, double z, int i, int j) { | |
| 69 super(x, y, z); | |
| 70 this.i = i; | |
| 71 this.j = j; | |
| 72 } | |
| 73 | |
| 74 | |
| 75 public double L1(Point2d other) { | |
| 76 return L1(this, other); | |
| 77 } | |
| 78 | |
| 79 public static double L1(Coordinate a, Coordinate b) { | |
| 80 return Math.abs(a.x - b.x) + Math.abs(a.y - b.y); | |
| 81 } | |
| 82 | |
| 83 public Envelope envelope() { | |
| 84 return envelope(EPSILON); | |
| 85 } | |
| 86 | |
| 87 public Envelope envelope(double epsilon) { | |
| 88 return new Envelope( | |
| 89 x-epsilon, x+epsilon, | |
| 90 y-epsilon, y+epsilon); | |
| 91 } | |
| 92 | |
| 93 public boolean hasIGap(Point2d other) { | |
| 94 return Math.abs(i - other.i) > 1; | |
| 95 } | |
| 96 | |
| 97 public boolean hasJGap(Point2d other) { | |
| 98 return Math.abs(j - other.j) > 1; | |
| 99 } | |
| 100 } | |
| 101 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |