Mercurial > dive4elements > river
comparison backend/src/main/java/org/dive4elements/river/importer/parsers/tim/Line.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 15:23:37 +0200 |
| parents | flys-backend/src/main/java/org/dive4elements/river/importer/parsers/tim/Line.java@18619c1e7c2a |
| children | 4dd33b86dc61 |
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| 5837:d9901a08d0a6 | 5838:5aa05a7a34b7 |
|---|---|
| 1 package org.dive4elements.river.importer.parsers.tim; | |
| 2 | |
| 3 /** Two coordinates and a helper. */ | |
| 4 public class Line { | |
| 5 | |
| 6 public Coordinate a; | |
| 7 public Coordinate b; | |
| 8 | |
| 9 public Line() { | |
| 10 } | |
| 11 | |
| 12 public Line(Coordinate a, Coordinate b) { | |
| 13 this.a = a; | |
| 14 this.b = b; | |
| 15 } | |
| 16 | |
| 17 /** Project coordinate to line. */ | |
| 18 public double distanceToFirst(Coordinate c) { | |
| 19 | |
| 20 double nx = b.x - a.x; | |
| 21 double ny = b.y - a.y; | |
| 22 | |
| 23 double len = Math.sqrt(nx*nx + ny*ny); | |
| 24 | |
| 25 nx /= len; | |
| 26 ny /= len; | |
| 27 | |
| 28 double px = c.x - a.x; | |
| 29 double py = c.y - a.y; | |
| 30 | |
| 31 return nx*px + ny*py; | |
| 32 } | |
| 33 } | |
| 34 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |