Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/DischargeTables.java @ 8870:c26fb37899ca

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Introduced groups for modules. Modules marked with the same group-id, will be put together in the ui. Also using now the localization info from the server instead of localizing the modules again on the client side.
author gernotbelger
date Wed, 07 Feb 2018 11:59:13 +0100
parents e4606eae8ea5
children 0a5239a1e46e
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.model;
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10
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11 import java.util.List;
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12 import java.util.Map;
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13 import java.util.HashMap;
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14 import java.util.Arrays;
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15
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16 import java.io.Serializable;
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17
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18 import org.hibernate.Session;
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19 import org.hibernate.Query;
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20
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21 import org.apache.log4j.Logger;
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22
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23 import org.dive4elements.river.backend.SessionHolder;
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24 import org.dive4elements.river.model.Gauge;
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25 import org.dive4elements.river.model.DischargeTable;
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26 import org.dive4elements.river.model.DischargeTableValue;
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27
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28 import gnu.trove.TDoubleArrayList;
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29
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30 /** Documentation goes here. */
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31 public class DischargeTables
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32 implements Serializable
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33 {
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34 /** Private log. */
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35 private static Logger log = Logger.getLogger(DischargeTables.class);
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36
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37 public static final int MASTER = 0;
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38
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39 protected List<String> gaugeNames;
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40
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41 protected String riverName;
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42
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43 protected int kind;
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44
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45 protected Map<String, double [][]> values;
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46
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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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53
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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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57
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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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61
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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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65
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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 this.kind = kind;
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72 this.riverName = riverName;
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73 this.gaugeNames = gaugeNames;
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74 }
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75
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76 public double [][] getFirstTable() {
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77 Map<String, double [][]> values = getValues();
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78 for (double [][] table: values.values()) {
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79 return table;
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80 }
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81 return null;
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82 }
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83
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84 public Map<String, double [][]> getValues() {
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85 if (values == null) {
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86 values = loadValues();
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87 }
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88 return values;
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89 }
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90
1929
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91 /**
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92 * Returns mapping of gauge name to values.
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93 */
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94 protected Map<String, double [][]> loadValues() {
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95 Map<String, double [][]> values = new HashMap<String, double [][]>();
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96
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97 Session session = SessionHolder.HOLDER.get();
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98
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99 Query gaugeQuery = session.createQuery(
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100 "from Gauge where name=:gauge and river.name=:river");
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101 gaugeQuery.setParameter("river", riverName);
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102
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103 for (String gaugeName: gaugeNames) {
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104 gaugeQuery.setParameter("gauge", gaugeName);
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105 List<Gauge> gauges = gaugeQuery.list();
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106 if (gauges.isEmpty()) {
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107 log.warn(
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108 "no gauge '"+gaugeName+"' at river '"+riverName+"'");
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109 continue;
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110 }
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111 Gauge gauge = gauges.get(0);
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112
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113 List<DischargeTable> tables = gauge.getDischargeTables();
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114
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115 if (tables.isEmpty()) {
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116 log.warn(
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117 "no discharge table for gauge '" + gaugeName + "'");
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118 continue;
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
119 }
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
120
311
ea3a438a7021 Backend access: Static methods are using the SessionHolder, too.
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parents: 154
diff changeset
121 // TODO: Filter by time interval
4919
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
122 DischargeTable table = null;
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
123 for (DischargeTable dt : tables) {
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
124 if (dt.getKind() == 0) {
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
125 table = dt;
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
126 break;
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
127 }
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
128 }
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
129 if (table == null) {
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
130 table = tables.get(0);
dbe9b7d6b80b Find correct discharge table for gauge.
Raimund Renkert <rrenkert@intevation.de>
parents: 4226
diff changeset
131 }
6301
20a32dbdbb59 Remove discharge table scaling but add reference system to W
Andre Heinecke <aheinecke@intevation.de>
parents: 5994
diff changeset
132 double [][] vs = loadDischargeTableValues(table);
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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parents: 328
diff changeset
133
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diff changeset
134 values.put(gaugeName, vs);
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
135 }
311
ea3a438a7021 Backend access: Static methods are using the SessionHolder, too.
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parents: 154
diff changeset
136
ea3a438a7021 Backend access: Static methods are using the SessionHolder, too.
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parents: 154
diff changeset
137 return values;
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
138 }
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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parents: 328
diff changeset
139
2230
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
140
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
141 /**
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
142 * @param table The discharge table
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
143 *
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
144 * @return the values of a discharge table.
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
145 */
6301
20a32dbdbb59 Remove discharge table scaling but add reference system to W
Andre Heinecke <aheinecke@intevation.de>
parents: 5994
diff changeset
146 public static double[][] loadDischargeTableValues(DischargeTable table) {
2230
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
147 List<DischargeTableValue> dtvs = table.getDischargeTableValues();
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
148
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
149 final double [][] vs = new double[2][dtvs.size()];
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
150
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
151 int idx = 0;
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
152 for (DischargeTableValue dtv: dtvs) {
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
153 double q = dtv.getQ().doubleValue();
6301
20a32dbdbb59 Remove discharge table scaling but add reference system to W
Andre Heinecke <aheinecke@intevation.de>
parents: 5994
diff changeset
154 vs[0][idx] = q;
20a32dbdbb59 Remove discharge table scaling but add reference system to W
Andre Heinecke <aheinecke@intevation.de>
parents: 5994
diff changeset
155 vs[1][idx] = dtv.getW().doubleValue();
2230
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
156 ++idx;
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
157 }
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
158
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
159 return vs;
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
160 }
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
161
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parents: 2230
diff changeset
162 private static final double EPSILON = 1e-5;
2230
59af81364eb1 Improved the 'historical discharge' calculation: implemented findValueForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1929
diff changeset
163
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parents: 2230
diff changeset
164 private static final boolean epsEquals(double a, double b) {
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parents: 2230
diff changeset
165 return Math.abs(a - b) < EPSILON;
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parents: 2230
diff changeset
166 }
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
167
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parents: 2230
diff changeset
168 private static final boolean between(double a, double b, double x) {
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parents: 2230
diff changeset
169 if (a > b) { double t = a; a = b; b = t; }
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parents: 2230
diff changeset
170 return x > a && x < b;
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parents: 2230
diff changeset
171 }
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parents: 2230
diff changeset
172
5340
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 4919
diff changeset
173 /**
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 4919
diff changeset
174 * Find or interpolate Qs from q/w array.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 4919
diff changeset
175 * @param values [[q0,q1,q2],[w0,w1,w2]]
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 4919
diff changeset
176 * @param w W value to look for in values.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 4919
diff changeset
177 */
2418
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parents: 2230
diff changeset
178 public static double [] getQsForW(double [][] values, double w) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
179
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
180 boolean debug = log.isDebugEnabled();
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
181
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
182 if (debug) {
2418
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parents: 2230
diff changeset
183 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
184 }
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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parents: 328
diff changeset
185
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parents: 2230
diff changeset
186 double [] qs = values[0];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
187 double [] ws = values[1];
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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parents: 328
diff changeset
188
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parents: 2230
diff changeset
189 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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parents: 328
diff changeset
190
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parents: 2230
diff changeset
191 if (N == 0) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
192 if (debug) {
2418
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
193 log.debug("Q(" + w + ") = []");
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
194 }
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
195 return new double [0];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
196 }
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
197
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
198 TDoubleArrayList outQs = new TDoubleArrayList();
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
199
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
200 if (epsEquals(ws[0], w)) {
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
201 outQs.add(qs[0]);
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
202 }
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
203
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
204 for (int i = 1; i < N; ++i) {
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
205 if (epsEquals(ws[i], w)) {
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
206 outQs.add(qs[i]);
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
207 }
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
208 else if (between(ws[i-1], ws[i], w)) {
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
209 double w1 = ws[i-1];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
210 double w2 = ws[i];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
211 double q1 = qs[i-1];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
212 double q2 = qs[i];
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
213
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
214 // q1 = m*w1 + b
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
215 // q2 = m*w2 + b
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
216 // q2 - q1 = m*(w2 - w1)
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
217 // m = (q2 - q1)/(w2 - w1) # w2 != w1
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
218 // b = q1 - m*w1
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
219 // w1 != w2
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
220
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
221 double m = (q2 - q1)/(w2 - w1);
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
222 double b = q1 - m*w1;
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
223 double q = w*m + b;
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
224
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
225 outQs.add(q);
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
226 }
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
diff changeset
227 }
2418
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parents: 2230
diff changeset
228
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
229 double [] result = outQs.toNativeArray();
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parents: 2230
diff changeset
230
899ca89f497e Another partial fix for flys/issue499: Do the W to Q conversions
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parents: 2230
diff changeset
231 if (debug) {
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parents: 2230
diff changeset
232 log.debug("Q(" + w + ") = " + Arrays.toString(result));
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
233 }
2418
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parents: 2230
diff changeset
234
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 2230
diff changeset
235 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
diff changeset
236 }
4226
cb9f22c3553f DischargeTables: Added missing getWsForQ()
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4138
diff changeset
237
cb9f22c3553f DischargeTables: Added missing getWsForQ()
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4138
diff changeset
238 public static double [] getWsForQ(double [][] values, double q) {
cb9f22c3553f DischargeTables: Added missing getWsForQ()
Sascha L. Teichmann <teichmann@intevation.de>
parents: 4138
diff changeset
239
cb9f22c3553f DischargeTables: Added missing getWsForQ()
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240 boolean debug = log.isDebugEnabled();
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241
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242 if (debug) {
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243 log.debug("getWsForQ: W = " + q);
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244 }
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245
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246 double [] qs = values[0];
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247 double [] ws = values[1];
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248
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249 int N = Math.min(qs.length, ws.length);
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250
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251 if (N == 0) {
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252 if (debug) {
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253 log.debug("W(" + q + ") = []");
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254 }
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255 return new double [0];
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256 }
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257
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258 TDoubleArrayList outWs = new TDoubleArrayList();
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259
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260 if (epsEquals(qs[0], q)) {
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261 outWs.add(ws[0]);
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262 }
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263
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264 for (int i = 1; i < N; ++i) {
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265 if (epsEquals(qs[i], q)) {
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266 outWs.add(ws[i]);
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267 }
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268 else if (between(qs[i-1], qs[i], q)) {
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269 double w1 = ws[i-1];
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270 double w2 = ws[i];
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271 double q1 = qs[i-1];
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272 double q2 = qs[i];
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273
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274 // w1 = m*q1 + b
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275 // w2 = m*q2 + b
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276 // w2 - w1 = m*(q2 - q1)
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277 // m = (w2 - w1)/(q2 - q1) # q2 != q1
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278 // b = w1 - m*q1
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279 // q1 != q2
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280
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281 double m = (w2 - w1)/(q2 - q1);
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282 double b = w1 - m*q1;
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283 double w = q*m + b;
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284
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285 outWs.add(w);
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286 }
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287 }
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288
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289 double [] result = outWs.toNativeArray();
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290
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291 if (debug) {
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292 log.debug("W(" + q + ") = " + Arrays.toString(result));
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293 }
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294
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295 return result;
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296 }
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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297 }
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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298 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org