Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java @ 2681:b94b367d8b4d
Minor refactoring, docs.
flys-artifacts/trunk@4379 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
|---|---|
| date | Thu, 10 May 2012 09:44:31 +0000 |
| parents | 22c8a9b4de31 |
| children | dc67ddd4a34c |
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| 2680:c0fbff11d287 | 2681:b94b367d8b4d |
|---|---|
| 22 | 22 |
| 23 public static final double EPSILON = 1e-4; | 23 public static final double EPSILON = 1e-4; |
| 24 | 24 |
| 25 public static enum Mode { UNDEF, WET, DRY }; | 25 public static enum Mode { UNDEF, WET, DRY }; |
| 26 | 26 |
| 27 | |
| 28 /** Never instantiate Lines, use static functions instead. */ | |
| 27 protected Lines() { | 29 protected Lines() { |
| 28 } | 30 } |
| 29 | 31 |
| 30 | 32 |
| 31 /** | 33 /** |
| 45 } | 47 } |
| 46 | 48 |
| 47 | 49 |
| 48 /** | 50 /** |
| 49 * Calculate the 'length' of the given lines. | 51 * Calculate the 'length' of the given lines. |
| 52 * @param lines lines of which to calculate length. | |
| 50 */ | 53 */ |
| 51 public static double length(List<Line2D> lines) { | 54 public static double length(List<Line2D> lines) { |
| 52 double sum = 0d; | 55 double sum = 0d; |
| 53 for (Line2D line: lines) { | 56 for (Line2D line: lines) { |
| 54 double xDiff = line.getX1() - line.getX2(); | 57 double xDiff = line.getX1() - line.getX2(); |
| 331 this.area = area; | 334 this.area = area; |
| 332 } | 335 } |
| 333 } | 336 } |
| 334 | 337 |
| 335 | 338 |
| 339 /** Return length of a single line. */ | |
| 340 public static double lineLength(Line2D line) { | |
| 341 double xDiff = line.getX1() - line.getX2(); | |
| 342 double yDiff = line.getY1() - line.getY2(); | |
| 343 return Math.sqrt(xDiff*xDiff + yDiff*yDiff); | |
| 344 } | |
| 345 | |
| 346 | |
| 347 /** | |
| 348 * @param points the riverbed. | |
| 349 */ | |
| 336 public static LineData createWaterLines( | 350 public static LineData createWaterLines( |
| 337 List<Point2D> points, | 351 List<Point2D> points, |
| 338 double waterlevel | 352 double waterlevel |
| 339 ) { | 353 ) { |
| 340 ListWithArea listAndArea = fillWater(points, waterlevel); | 354 ListWithArea listAndArea = fillWater(points, waterlevel); |
| 352 lys.add(p1.getY()); | 366 lys.add(p1.getY()); |
| 353 lxs.add(p2.getX()); | 367 lxs.add(p2.getX()); |
| 354 lys.add(p2.getY()); | 368 lys.add(p2.getY()); |
| 355 | 369 |
| 356 // Length calculation. | 370 // Length calculation. |
| 357 double xDiff = line.getX1() - line.getX2(); | 371 linesLength += lineLength(line); |
| 358 double yDiff = line.getY1() - line.getY2(); | |
| 359 linesLength += Math.sqrt(xDiff*xDiff + yDiff*yDiff); | |
| 360 | 372 |
| 361 if (iter.hasNext()) { | 373 if (iter.hasNext()) { |
| 362 lxs.add(Double.NaN); | 374 lxs.add(Double.NaN); |
| 363 lys.add(Double.NaN); | 375 lys.add(Double.NaN); |
| 364 } | 376 } |