Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java @ 4187:21f4e4b79121

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Refactor GaugeDischargeCurveFacet to be able to set a facet name For adding another output of the GaugeDischargeCurveArtifact it is necessary to provide to facet instances with different names. Therefore the GaugeDischargeCurveFacet is extended to set the facet name in the constructor.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 19 Oct 2012 13:25:49 +0200
parents 1d9c9a3493ea
children cb9f22c3553f
rev   line source
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.List;
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4 import java.util.Map;
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5 import java.util.HashMap;
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6 import java.util.Arrays;
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7
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8 import java.io.Serializable;
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10 import org.hibernate.Session;
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11 import org.hibernate.Query;
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13 import org.apache.log4j.Logger;
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15 import de.intevation.flys.backend.SessionHolder;
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16 import de.intevation.flys.model.Gauge;
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17 import de.intevation.flys.model.DischargeTable;
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18 import de.intevation.flys.model.DischargeTableValue;
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20 import gnu.trove.TDoubleArrayList;
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22 /** Documentation goes here. */
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23 public class DischargeTables
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24 implements Serializable
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25 {
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26 /** Private logger. */
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27 private static Logger log = Logger.getLogger(DischargeTables.class);
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29 /** Scale to convert discharge table values of master table into [cm] */
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30 public static final double MASTER_SCALE = 100d;
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31
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32 /** Scale to convert discharge table values of historical tables into [cm] */
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33 public static final double HISTORICAL_SCALE = 1d;
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35 public static final int MASTER = 0;
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37 protected List<String> gaugeNames;
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39 protected String riverName;
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41 protected double scale;
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42
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43 protected int kind;
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45 protected Map<String, double [][]> values;
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47 public DischargeTables() {
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48 }
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49
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50 public DischargeTables(String riverName, String gaugeName) {
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51 this(riverName, gaugeName, MASTER);
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52 }
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54 public DischargeTables(String riverName, String gaugeName, int kind) {
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55 this(riverName, new String [] { gaugeName }, kind);
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56 }
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58 public DischargeTables(String riverName, String [] gaugeNames) {
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59 this(riverName, gaugeNames, MASTER);
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60 }
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62 public DischargeTables(String riverName, String [] gaugeNames, int kind) {
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63 this(riverName, Arrays.asList(gaugeNames), kind);
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64 }
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66 public DischargeTables(
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67 String riverName,
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68 List<String> gaugeNames,
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69 int kind
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70 ) {
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71 scale = Double.NaN;
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72 this.kind = kind;
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73 this.riverName = riverName;
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74 this.gaugeNames = gaugeNames;
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75 }
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76
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77 public double [][] getFirstTable() {
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78 return getFirstTable(MASTER_SCALE);
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79 }
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81 public double [][] getFirstTable(double scale) {
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82 Map<String, double [][]> values = getValues(scale);
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83 for (double [][] table: values.values()) {
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84 return table;
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85 }
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86 return null;
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87 }
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89 public Map<String, double [][]> getValues() {
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90 return getValues(MASTER_SCALE);
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91 }
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92
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93 public Map<String, double [][]> getValues(double scale) {
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94 if (values == null || scale != this.scale) {
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95 values = loadValues(scale);
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96 this.scale = scale;
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97 }
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98 return values;
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99 }
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100
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101 /**
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102 * Returns mapping of gauge name to values.
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103 */
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104 protected Map<String, double [][]> loadValues(double scale) {
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105 Map<String, double [][]> values = new HashMap<String, double [][]>();
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106
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107 Session session = SessionHolder.HOLDER.get();
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108
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109 Query gaugeQuery = session.createQuery(
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110 "from Gauge where name=:gauge and river.name=:river");
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111 gaugeQuery.setParameter("river", riverName);
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113 for (String gaugeName: gaugeNames) {
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114 gaugeQuery.setParameter("gauge", gaugeName);
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115 List<Gauge> gauges = gaugeQuery.list();
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116 if (gauges.isEmpty()) {
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117 log.warn(
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118 "no gauge '"+gaugeName+"' at river '"+riverName+"'");
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119 continue;
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120 }
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121 Gauge gauge = gauges.get(0);
146
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122
311
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123 List<DischargeTable> tables = gauge.getDischargeTables();
146
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124
311
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125 if (tables.isEmpty()) {
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126 log.warn(
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127 "no discharge table for gauge '" + gaugeName + "'");
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128 continue;
146
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parents:
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129 }
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130
311
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131 // TODO: Filter by time interval
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132 DischargeTable table = tables.get(0);
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133
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134 double [][] vs = loadDischargeTableValues(table, scale);
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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135
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136 values.put(gaugeName, vs);
146
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137 }
311
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138
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139 return values;
146
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140 }
329
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141
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142
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
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143 /**
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144 * @param table The discharge table
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145 * @param scale The scale factor to adjust W and Q values.
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146 *
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147 * @return the values of a discharge table.
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148 */
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149 public static double[][] loadDischargeTableValues(
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150 DischargeTable table,
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151 double scale
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152 ) {
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153 List<DischargeTableValue> dtvs = table.getDischargeTableValues();
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154
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155 final double [][] vs = new double[2][dtvs.size()];
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156
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diff changeset
157 int idx = 0;
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diff changeset
158 for (DischargeTableValue dtv: dtvs) {
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diff changeset
159 double q = dtv.getQ().doubleValue();
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diff changeset
160 vs[0][idx] = q * scale;
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diff changeset
161 vs[1][idx] = dtv.getW().doubleValue() * scale;
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diff changeset
162 ++idx;
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diff changeset
163 }
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
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diff changeset
164
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
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165 return vs;
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diff changeset
166 }
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diff changeset
167
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168 private static final double EPSILON = 1e-5;
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169
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170 private static final boolean epsEquals(double a, double b) {
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171 return Math.abs(a - b) < EPSILON;
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172 }
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173
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174 private static final boolean between(double a, double b, double x) {
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175 if (a > b) { double t = a; a = b; b = t; }
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176 return x > a && x < b;
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177 }
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178
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179 public static double [] getQsForW(double [][] values, double w) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
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180
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diff changeset
181 boolean debug = log.isDebugEnabled();
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182
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183 if (debug) {
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184 log.debug("getQsForW: W = " + w);
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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185 }
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diff changeset
186
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187 double [] qs = values[0];
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188 double [] ws = values[1];
329
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diff changeset
189
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190 int N = Math.min(qs.length, ws.length);
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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diff changeset
191
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diff changeset
192 if (N == 0) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
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diff changeset
193 if (debug) {
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194 log.debug("Q(" + w + ") = []");
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195 }
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diff changeset
196 return new double [0];
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diff changeset
197 }
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diff changeset
198
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diff changeset
199 TDoubleArrayList outQs = new TDoubleArrayList();
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diff changeset
200
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diff changeset
201 if (epsEquals(ws[0], w)) {
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diff changeset
202 outQs.add(qs[0]);
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diff changeset
203 }
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diff changeset
204
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diff changeset
205 for (int i = 1; i < N; ++i) {
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diff changeset
206 if (epsEquals(ws[i], w)) {
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diff changeset
207 outQs.add(qs[i]);
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diff changeset
208 }
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diff changeset
209 else if (between(ws[i-1], ws[i], w)) {
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diff changeset
210 double w1 = ws[i-1];
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diff changeset
211 double w2 = ws[i];
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diff changeset
212 double q1 = qs[i-1];
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diff changeset
213 double q2 = qs[i];
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diff changeset
214
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diff changeset
215 // q1 = m*w1 + b
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diff changeset
216 // q2 = m*w2 + b
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diff changeset
217 // q2 - q1 = m*(w2 - w1)
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diff changeset
218 // m = (q2 - q1)/(w2 - w1) # w2 != w1
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diff changeset
219 // b = q1 - m*w1
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diff changeset
220 // w1 != w2
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diff changeset
221
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diff changeset
222 double m = (q2 - q1)/(w2 - w1);
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diff changeset
223 double b = q1 - m*w1;
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diff changeset
224 double q = w*m + b;
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diff changeset
225
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diff changeset
226 outQs.add(q);
378
20c3a5b36434 Repaired DischargeTables.getQForW()
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diff changeset
227 }
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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diff changeset
228 }
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diff changeset
229
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diff changeset
230 double [] result = outQs.toNativeArray();
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231
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
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232 if (debug) {
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
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233 log.debug("Q(" + w + ") = " + Arrays.toString(result));
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
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234 }
2418
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
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235
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
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236 return result;
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
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237 }
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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238 }
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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239 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org