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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FixingsColumn.java @ 3069:4067ec9036c2

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FixA facet: Use binary search again. flys-artifacts/trunk@4653 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 13 Jun 2012 15:36:13 +0000
parents 70469e3d34b9
children
rev   line source
2610
3c907758f0ab Added cacheable model for fixing column.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.flys.artifacts.model;
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2
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3 import de.intevation.flys.artifacts.math.Linear;
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4
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5 import java.util.Arrays;
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6
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7 import java.io.Serializable;
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8
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9 public class FixingsColumn
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10 implements Serializable
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11 {
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12 protected double [] kms;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13 protected double [] ws;
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14
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15 protected QRangeTree qs;
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16
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17 public FixingsColumn() {
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18 }
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19
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20 public FixingsColumn(
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21 double [] kms,
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22 double [] ws,
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23 QRangeTree qs
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24 ) {
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25 this.kms = kms;
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26 this.ws = ws;
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27 this.qs = qs;
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28 }
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29
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30 public boolean getW(double km, double [] w) {
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31 return getW(km, w, 0);
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32 }
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33
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34 public boolean getW(double km, double [] w, int index) {
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35
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36 if (kms.length == 0 || km < kms[0] || km > kms[kms.length-1]) {
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37 w[index] = Double.NaN;
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38 return true;
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39 }
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40
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41 int idx = Arrays.binarySearch(kms, km);
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42
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43 if (idx >= 0) {
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44 w[index] = ws[idx];
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45 return true;
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46 }
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47
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48 idx = -idx - 1;
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49
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70469e3d34b9 FixA: Made Delta W/t calculation finally work
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50 w[index] = Linear.linear(km, kms[idx-1], kms[idx], ws[idx-1], ws[idx]);
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51 return false;
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52 }
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53
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54 public double getQ(double km) {
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55 return qs.findQ(km);
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56 }
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57
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58 public QRangeTree getQRanges() {
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59 return qs;
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60 }
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61 }
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62 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org