Mercurial > dive4elements > gnv-client

comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 1119:7c4f81f74c47

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merged gnv-artifacts
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:00 +0200
parents f953c9a559d8
children
comparison
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1027:fca4b5eb8d2f 1119:7c4f81f74c47
1 /*
2 * Copyright (c) 2010 by Intevation GmbH
3 *
4 * This program is free software under the LGPL (>=v2.1)
5 * Read the file LGPL.txt coming with the software for details
6 * or visit http://www.gnu.org/licenses/ if it does not exist.
7 */
8
9 package de.intevation.gnv.raster;
10
11 import de.intevation.gnv.jfreechart.CompactXYItems;
12 import de.intevation.gnv.jfreechart.PolygonSeries;
13
14 import de.intevation.gnv.math.IJKey;
15
16 import de.intevation.gnv.raster.Vectorizer.Edge;
17
18 import gnu.trove.TDoubleArrayList;
19 import gnu.trove.TIntObjectHashMap;
20
21 import java.util.ArrayList;
22 import java.util.Collection;
23
24 import org.apache.log4j.Logger;
25
26 /**
27 * Vectorizer backend to generate iso lines which are able to be visualized
28 * via {@link de.intevation.gnv.jfreechart.PolygonPlot} as line strings
29 * and custom labels on the chart.
30 *
31 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
32 */
33 public class IsoPolygonSeriesProducer
34 extends IsoProducer
35 {
36 private static Logger log = Logger.getLogger(
37 IsoPolygonSeriesProducer.class);
38
39 /**
40 * The line width of the line string used in the chart.
41 */
42 public static final Float LINE_WIDTH = Float.valueOf(0.1f);
43
44 /**
45 * Constructor to create an IsoPolygonSeriesProducer with a
46 * given world bounding box.
47 * @param minX Min x coord of the world.
48 * @param minY Min y coord of the world.
49 * @param maxX Max x coord of the world.
50 * @param maxY Max y coord of the world.
51 */
52 public IsoPolygonSeriesProducer(
53 double minX, double minY,
54 double maxX, double maxY
55 ) {
56 super(minX, minY, maxX, maxY);
57 }
58
59 /**
60 * Returns a collection of series with line strings
61 * with no AttributeGenerator.
62 * @return The collection with line strings.
63 */
64 public Collection<PolygonSeries> getSeries() {
65 return getSeries(null);
66 }
67
68 /**
69 * Returns a collection of series with line strings.
70 * The label attributes are generated with a given generator.
71 * @param attributeGenerator The attribute generator. Maybe null
72 * if no attributes should be generated.
73 * @return The collection with the line strings.
74 */
75 public Collection<PolygonSeries> getSeries(
76 AttributeGenerator attributeGenerator
77 ) {
78 ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>();
79
80 double b1 = minX;
81 double m1 = width != 1
82 ? (maxX - minX)/(width-1)
83 : 0d;
84
85 double b2 = minY;
86 double m2 = height != 1
87 ? (maxY - minY)/(height-1)
88 : 0d;
89
90 TDoubleArrayList vertices = new TDoubleArrayList();
91
92 for (IJKey key: joinPairs()) {
93 PolygonSeries ps = new PolygonSeries();
94
95 // process complete
96 ArrayList<Edge> completeList = complete.get(key);
97 if (completeList != null) {
98 for (Edge head: completeList) {
99 Edge current = head;
100 do {
101 vertices.add(m1*(current.a % width) + b1);
102 vertices.add(m2*(current.a / width) + b2);
103 }
104 while ((current = current.next) != head);
105 // add head again to close shape
106 vertices.add(m1*(head.a % width) + b1);
107 vertices.add(m2*(head.a / width) + b2);
108 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
109 vertices.reset();
110 }
111 }
112
113 // process open
114 TIntObjectHashMap map = commonOpen.get(key);
115
116 if (map != null) {
117 for (Edge head: headList(map)) {
118
119 head = Vectorizer.simplify(head, width);
120 Edge current = head, last = head;
121 do {
122 vertices.add(m1*(current.a % width) + b1);
123 vertices.add(m2*(current.a / width) + b2);
124 last = current;
125 }
126 while ((current = current.next) != null);
127 // add b from tail
128 vertices.add(m1*(last.b % width) + b1);
129 vertices.add(m2*(last.b / width) + b2);
130 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
131 vertices.reset();
132 } // for all in common open
133 } // if map defined for key
134
135 if (ps.getItemCount() > 0) {
136 series.add(ps);
137 if (attributeGenerator != null) {
138 Object attribute = attributeGenerator
139 .generateAttribute(key.i, key.j);
140
141 if (attribute != null) {
142 ps.setAttribute("label", attribute);
143 }
144 }
145 ps.setAttribute("line.width", LINE_WIDTH);
146 }
147 } // for all pairs
148
149 return series;
150 }
151 }
152 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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