Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/math/Point2d.java @ 592:3c939c95c477
Removed accidental checkin of Test-Shapefiles
gnv-artifacts/trunk@647 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Fri, 29 Jan 2010 13:28:28 +0000 |
parents | 422275fc9927 |
children | b248531fa20b |
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package de.intevation.gnv.math; import java.util.Comparator; import com.vividsolutions.jts.geom.Envelope; import com.vividsolutions.jts.geom.Coordinate; /** * @author Sascha L. Teichmann */ public class Point2d extends Coordinate { public static final double EPSILON = 1e-3d; public static final Comparator X_COMPARATOR = new Comparator() { public int compare(Object a, Object b) { double xa = ((Coordinate)a).x; double xb = ((Coordinate)b).x; if (xa < xb) return -1; if (xa > xb) return +1; return 0; } }; public static final Comparator Y_COMPARATOR = new Comparator() { public int compare(Object a, Object b) { double ya = ((Coordinate)a).y; double yb = ((Coordinate)b).y; if (ya < yb) return -1; if (ya > yb) return +1; return 0; } }; public static class InverseL1Comparator implements Comparator { private Point2d ref; public InverseL1Comparator(Point2d ref) { this.ref = ref; } public int compare(Object a, Object b) { Point2d pa = (Point2d)a; Point2d pb = (Point2d)b; double da = ref.L1(pa); double db = ref.L1(pb); if (da < db) return -1; if (da > db) return +1; return 0; } } // class InverseL1Comparator public int i; public int j; public Point2d() { } public Point2d(double x, double y, int i, int j) { super(x, y); this.i = i; this.j = j; } public Point2d(double x, double y, double z, int i, int j) { super(x, y, z); this.i = i; this.j = j; } public double L1(Point2d other) { return L1(this, other); } public static double L1(Coordinate a, Coordinate b) { return Math.abs(a.x - b.x) + Math.abs(a.y - b.y); } public Envelope envelope() { return envelope(EPSILON); } public Envelope envelope(double epsilon) { return new Envelope( x-epsilon, x+epsilon, y-epsilon, y+epsilon); } public boolean hasIGap(Point2d other) { return Math.abs(i - other.i) > 1; } public boolean hasJGap(Point2d other) { return Math.abs(j - other.j) > 1; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: