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