Mercurial > dive4elements > gnv-client

comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 875:5e9efdda6894

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merged gnv-artifacts/1.0
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:13:56 +0200
parents 4abe172be970
children f953c9a559d8
comparison
equal deleted inserted replaced
722:bb3ffe7d719e 875:5e9efdda6894
1 package de.intevation.gnv.raster;
2
3 import de.intevation.gnv.jfreechart.CompactXYItems;
4 import de.intevation.gnv.jfreechart.PolygonSeries;
5
6 import de.intevation.gnv.math.IJKey;
7
8 import de.intevation.gnv.raster.Vectorizer.Edge;
9
10 import gnu.trove.TDoubleArrayList;
11 import gnu.trove.TIntObjectHashMap;
12
13 import java.util.ArrayList;
14 import java.util.Collection;
15
16 import org.apache.log4j.Logger;
17
18 /**
19 * Vectorizer backend to generate iso lines which are able to be visualized
20 * via {@link de.intevation.gnv.jfreechart.PolygonPlot} as line strings
21 * and custom labels on the chart.
22 *
23 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
24 */
25 public class IsoPolygonSeriesProducer
26 extends IsoProducer
27 {
28 private static Logger log = Logger.getLogger(
29 IsoPolygonSeriesProducer.class);
30
31 /**
32 * The line width of the line string used in the chart.
33 */
34 public static final Float LINE_WIDTH = Float.valueOf(0.1f);
35
36 /**
37 * Constructor to create an IsoPolygonSeriesProducer with a
38 * given world bounding box.
39 * @param minX Min x coord of the world.
40 * @param minY Min y coord of the world.
41 * @param maxX Max x coord of the world.
42 * @param maxY Max y coord of the world.
43 */
44 public IsoPolygonSeriesProducer(
45 double minX, double minY,
46 double maxX, double maxY
47 ) {
48 super(minX, minY, maxX, maxY);
49 }
50
51 /**
52 * Returns a collection of series with line strings
53 * with no AttributeGenerator.
54 * @return The collection with line strings.
55 */
56 public Collection<PolygonSeries> getSeries() {
57 return getSeries(null);
58 }
59
60 /**
61 * Returns a collection of series with line strings.
62 * The label attributes are generated with a given generator.
63 * @param attributeGenerator The attribute generator. Maybe null
64 * if no attributes should be generated.
65 * @return The collection with the line strings.
66 */
67 public Collection<PolygonSeries> getSeries(
68 AttributeGenerator attributeGenerator
69 ) {
70 ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>();
71
72 double b1 = minX;
73 double m1 = width != 1
74 ? (maxX - minX)/(width-1)
75 : 0d;
76
77 double b2 = minY;
78 double m2 = height != 1
79 ? (maxY - minY)/(height-1)
80 : 0d;
81
82 TDoubleArrayList vertices = new TDoubleArrayList();
83
84 for (IJKey key: joinPairs()) {
85 PolygonSeries ps = new PolygonSeries();
86
87 // process complete
88 ArrayList<Edge> completeList = complete.get(key);
89 if (completeList != null) {
90 for (Edge head: completeList) {
91 Edge current = head;
92 do {
93 vertices.add(m1*(current.a % width) + b1);
94 vertices.add(m2*(current.a / width) + b2);
95 }
96 while ((current = current.next) != head);
97 // add head again to close shape
98 vertices.add(m1*(head.a % width) + b1);
99 vertices.add(m2*(head.a / width) + b2);
100 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
101 vertices.reset();
102 }
103 }
104
105 // process open
106 TIntObjectHashMap map = commonOpen.get(key);
107
108 if (map != null) {
109 for (Edge head: headList(map)) {
110
111 head = Vectorizer.simplify(head, width);
112 Edge current = head, last = head;
113 do {
114 vertices.add(m1*(current.a % width) + b1);
115 vertices.add(m2*(current.a / width) + b2);
116 last = current;
117 }
118 while ((current = current.next) != null);
119 // add b from tail
120 vertices.add(m1*(last.b % width) + b1);
121 vertices.add(m2*(last.b / width) + b2);
122 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
123 vertices.reset();
124 } // for all in common open
125 } // if map defined for key
126
127 if (ps.getItemCount() > 0) {
128 series.add(ps);
129 if (attributeGenerator != null) {
130 Object attribute = attributeGenerator
131 .generateAttribute(key.i, key.j);
132
133 if (attribute != null) {
134 ps.setAttribute("label", attribute);
135 }
136 }
137 ps.setAttribute("line.width", LINE_WIDTH);
138 }
139 } // for all pairs
140
141 return series;
142 }
143 }
144 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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