Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/math/LinearMetrics.java @ 469:62fc63d0f71d

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Added a new State in Product Verticalprofile in Timeseriespoints. Now it will be displayed the Years where measurements happened and than only the dates of the chosen Year will be fetched and displayed. gnv-artifacts/trunk@532 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 12 Jan 2010 12:42:53 +0000
parents aec85d00d82c
children 6cff63d0c434
rev   line source
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1 package de.intevation.gnv.math;
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2
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3 import com.vividsolutions.jts.geom.Coordinate;
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4
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5 /**
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6 * @author Sascha L. Teichmann
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7 */
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8 public final class LinearMetrics
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9 implements Metrics
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10 {
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11 public static final Metrics INSTANCE =
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12 new LinearMetrics();
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13
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14 public static final class LinearInterpolator
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15 implements Interpolator
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16 {
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17 private double mx;
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18 private double bx;
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19 private double my;
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20 private double by;
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22 public LinearInterpolator(Coordinate p1, Coordinate p2) {
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23
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24 /*
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25 I) p1.x = 0*m + bx
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26 II) p2.x = 1*m + bx
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27
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28 bx = p1.x
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29
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30 p2.x = m + p1.x
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31
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32 mx = p2.x - p1.x
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33 */
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35 bx = p1.x;
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36 mx = p2.x - bx;
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38 by = p1.y;
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39 my = p2.y - by;
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40 }
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42 public void interpolate(double t, Coordinate v) {
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43 v.x = t*mx + bx;
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44 v.y = t*my + by;
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45 }
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46 } // class LinearInterpolator
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47
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48 private LinearMetrics() {
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49 }
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51 public double distance(Coordinate p1, Coordinate p2) {
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52 return p1.distance(p2);
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53 }
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54
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55 public Interpolator getInterpolator(Coordinate p1, Coordinate p2) {
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56 return new LinearInterpolator(p1, p2);
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57 }
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58 }
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59 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org