Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/math/LinearMetrics.java @ 360:ee760729f6b8
Added mapping from linear diagram space to 2D map coordinates.
gnv-artifacts/trunk@434 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Tue, 15 Dec 2009 15:58:58 +0000 |
| parents | |
| children | aec85d00d82c |
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| 359:59ad8f37a590 | 360:ee760729f6b8 |
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| 1 package de.intevation.gnv.math; | |
| 2 | |
| 3 import java.awt.geom.Point2D; | |
| 4 | |
| 5 import de.intevation.gnv.math.LinearToMap.Metrics; | |
| 6 import de.intevation.gnv.math.LinearToMap.Interpolator; | |
| 7 | |
| 8 /** | |
| 9 * @author Sascha L. Teichmann | |
| 10 */ | |
| 11 public final class LinearMetrics | |
| 12 implements Metrics | |
| 13 { | |
| 14 public static final Metrics INSTANCE = | |
| 15 new LinearMetrics(); | |
| 16 | |
| 17 public static final class LinearInterpolator | |
| 18 implements Interpolator | |
| 19 { | |
| 20 private double mx; | |
| 21 private double bx; | |
| 22 private double my; | |
| 23 private double by; | |
| 24 | |
| 25 public LinearInterpolator(Point2D p1, Point2D p2) { | |
| 26 | |
| 27 /* | |
| 28 I) p1.x = 0*m + bx | |
| 29 II) p2.x = 1*m + bx | |
| 30 | |
| 31 bx = p1.x | |
| 32 | |
| 33 p2.x = m + p1.x | |
| 34 | |
| 35 mx = p2.x - p1.x | |
| 36 */ | |
| 37 | |
| 38 bx = p1.getX(); | |
| 39 mx = p2.getX() - bx; | |
| 40 | |
| 41 by = p1.getY(); | |
| 42 my = p2.getY() - by; | |
| 43 } | |
| 44 | |
| 45 public void interpolate(double t, Point2D v) { | |
| 46 double x = t*mx + bx; | |
| 47 double y = t*my + by; | |
| 48 v.setLocation(x, y); | |
| 49 } | |
| 50 } // class LinearInterpolator | |
| 51 | |
| 52 private LinearMetrics() { | |
| 53 } | |
| 54 | |
| 55 public double distance(Point2D p1, Point2D p2) { | |
| 56 return p1.distance(p2); | |
| 57 } | |
| 58 | |
| 59 public Interpolator getInterpolator(Point2D p1, Point2D p2) { | |
| 60 return new LinearInterpolator(p1, p2); | |
| 61 } | |
| 62 } | |
| 63 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |