Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/math/LinearMetrics.java @ 1106:8ce8979f51df
Added the transition chain for the external mapviewer call (issue318).
gnv-artifacts/trunk@1237 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 29 Jun 2010 07:09:13 +0000 |
parents | 05bf8534a35a |
children | f953c9a559d8 |
rev | line source |
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360
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Added mapping from linear diagram space to 2D map coordinates.
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1 package de.intevation.gnv.math; |
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Added mapping from linear diagram space to 2D map coordinates.
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2 |
361
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Added code to do 2D interpolations along a digitied track on the map.
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3 import com.vividsolutions.jts.geom.Coordinate; |
360
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4 |
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Added mapping from linear diagram space to 2D map coordinates.
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5 /** |
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6 * Implements {@link de.intevation.gnv.math.Metrics} |
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7 * for linear interpolations and distance measurements. |
798
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Fixed vim modeline. Added some Javadoc.
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8 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
360
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9 */ |
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10 public final class LinearMetrics |
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11 implements Metrics |
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12 { |
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13 /** |
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14 * Instance to prevent needless creations of instances. |
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15 */ |
360
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16 public static final Metrics INSTANCE = |
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17 new LinearMetrics(); |
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18 |
805
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19 /** |
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20 * Implements the corresponding linear interpolator. |
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21 */ |
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22 public static final class LinearInterpolator |
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23 implements Interpolator |
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24 { |
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25 private double mx; |
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26 private double bx; |
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27 private double my; |
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28 private double by; |
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29 |
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30 /** |
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31 * Constructor to create a linear interpolator between two |
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32 * given points. |
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33 * @param p1 The first point. |
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34 * @param p2 The second point. |
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35 */ |
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36 public LinearInterpolator(Coordinate p1, Coordinate p2) { |
360
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37 |
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Added mapping from linear diagram space to 2D map coordinates.
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38 /* |
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39 I) p1.x = 0*m + bx |
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40 II) p2.x = 1*m + bx |
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parents:
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41 |
ee760729f6b8
Added mapping from linear diagram space to 2D map coordinates.
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parents:
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42 bx = p1.x |
ee760729f6b8
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parents:
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43 |
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44 p2.x = m + p1.x |
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45 |
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46 mx = p2.x - p1.x |
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47 */ |
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48 |
361
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49 bx = p1.x; |
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parents:
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50 mx = p2.x - bx; |
360
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51 |
361
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52 by = p1.y; |
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53 my = p2.y - by; |
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54 } |
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55 |
361
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56 public void interpolate(double t, Coordinate v) { |
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57 v.x = t*mx + bx; |
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58 v.y = t*my + by; |
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59 } |
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60 } // class LinearInterpolator |
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61 |
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62 private LinearMetrics() { |
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63 } |
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64 |
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65 public double distance(Coordinate p1, Coordinate p2) { |
360
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66 return p1.distance(p2); |
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67 } |
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68 |
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69 public Interpolator getInterpolator(Coordinate p1, Coordinate p2) { |
360
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70 return new LinearInterpolator(p1, p2); |
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71 } |
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72 } |
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Using unix line endings only.
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73 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |