Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/importer/parsers/tim/Line.java @ 4732:7fdddc6ba296
Initial version of support files for TIMParser, comments and TODOs by Felix Wolfsteller, Code by Sascha Teichmann.
| author | Sascha Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Fri, 28 Dec 2012 15:01:12 +0100 |
| parents | |
| children | ce6b9945bf8e |
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| 4731:7d9fcd322c45 | 4732:7fdddc6ba296 |
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| 1 package de.intevation.flys.importer.parsers.tim; | |
| 2 | |
| 3 public class Line { | |
| 4 | |
| 5 public Coordinate a; | |
| 6 public Coordinate b; | |
| 7 | |
| 8 public Line() { | |
| 9 } | |
| 10 | |
| 11 public Line(Coordinate a, Coordinate b) { | |
| 12 this.a = a; | |
| 13 this.b = b; | |
| 14 } | |
| 15 | |
| 16 /** Project coordinate to line. */ | |
| 17 public double distanceToFirst(Coordinate c) { | |
| 18 | |
| 19 double nx = b.x - a.x; | |
| 20 double ny = b.y - a.y; | |
| 21 | |
| 22 double len = Math.sqrt(nx*nx + ny*ny); | |
| 23 | |
| 24 nx /= len; | |
| 25 ny /= len; | |
| 26 | |
| 27 double px = c.x - a.x; | |
| 28 double py = c.y - a.y; | |
| 29 | |
| 30 return nx*px + ny*py; | |
| 31 } | |
| 32 } | |
| 33 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |