Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/IndexBuffer.java @ 605:e8ebdbc7f1e3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
First step of removing the cache blob. The static part of the describe document will be created by using the input data stored at each state. Some TODOs left (see ChangeLog). gnv-artifacts/trunk@671 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 09 Feb 2010 14:27:55 +0000
parents 555483213f78
children b1f5f2a8840f
rev   line source
349
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.gnv.utils;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 import java.awt.geom.Point2D;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
5 import java.awt.Point;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
6
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
7 import java.util.List;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
9 /**
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
10 * Create buffers around integer pairs (i_1..n), j_1..n).
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
11 *
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
12 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
13 */
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
14 public class IndexBuffer
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
15 {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
16 public static final double EPSILON = 1e-6d;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
17 public static final double OFFSET = 1.0d;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
18
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
19 public static final String I_COLUMN = "IPOSITION";
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
20 public static final String J_COLUMN = "JPOSITION";
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
21
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
22 public static final class Segment {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
23
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
24 private Segment next;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
25
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
26 private Point2D.Double n;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
27 private double d1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
28 private double d2;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
30 private int iMin;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
31 private int iMax;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
32
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33 private int jMin;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34 private int jMax;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
35
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36 public Segment(Point a, Point b, Segment next) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
37
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
38 this.next = next;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
39
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
40 iMin = Math.min(a.x, b.x)-1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
41 iMax = Math.max(a.x, b.x)+1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
42
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
43 jMin = Math.min(a.y, b.y)-1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
44 jMax = Math.max(a.y, b.y)+1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
45
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
46 if (a.x > b.x) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
47 Point p = a; a = b; b = p;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
48 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
49
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
50 Point2D.Double p1, p2, p3;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
51
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
52 if (a.y < b.y) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
53 p1 = new Point2D.Double(a.x - OFFSET, a.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
54 p2 = new Point2D.Double(b.x - OFFSET, b.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
55 p3 = new Point2D.Double(a.x + 1 + OFFSET, a.y - OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
56 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
57 else {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
58 p1 = new Point2D.Double(a.x + 1 + OFFSET, a.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
59 p2 = new Point2D.Double(b.x + 1 + OFFSET, b.y + 1 + OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
60 p3 = new Point2D.Double(b.x - OFFSET, b.y - OFFSET);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
61 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
62
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
63 n = normalize(orthogonal(sub(p1, p2)));
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
64
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
65 d1 = dot(n, p1);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
66 d2 = dot(n, p3);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
67
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
68 if (d1 > d2) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
69 double d = d1;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
70 d1 = d2;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
71 d2 = d;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
72 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
73 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
74
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
75 public boolean check(int i, int j) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
76 if (i < iMin || i > iMax || j < jMin || j > jMax) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
77 return false;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
78 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
79 double v = dot(n, i, j);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
80 return v >= d1 && v <= d2;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
81 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
82
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
83 public void toWhereClause(StringBuilder sb, String iColumn, String jColumn) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
84 sb.append('(')
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
85 .append(iColumn).append(" >= ").append(iMin).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
86 .append(iColumn).append(" <= ").append(iMax).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
87 .append(jColumn).append(" >= ").append(jMin).append(" AND ")
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
88 .append(jColumn).append(" <= ").append(jMax).append(" AND (")
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
89 .append(n.x).append('*').append(iColumn).append(" + ")
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
90 .append(n.y).append('*').append(jColumn)
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
91 .append(") BETWEEN ").append(d1).append(" AND ").append(d2).append(')');
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
92 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
93 } // class Segment
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
94
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
95 protected Segment head;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
96
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
97 protected String iColumn;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
98 protected String jColumn;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
99
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
100 public IndexBuffer(List<? extends Point> points) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
101 this(points, I_COLUMN, J_COLUMN);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
102 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
103
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
104 public IndexBuffer(List<? extends Point> points, String iColumn, String jColumn) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
105 this.iColumn = iColumn;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
106 this.jColumn = jColumn;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
107
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
108 for (int i = 1, N = points.size(); i < N; ++i) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
109 Point p1 = (Point)points.get(i-1);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
110 Point p2 = (Point)points.get(i);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
111 head = new Segment(p1, p2, head);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
112 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
113 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
114
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
115 public boolean check(int i, int j) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
116
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
117 Segment current = head;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
118 while (current != null) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
119 if (current.check(i, j)) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
120 return true;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
121 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
122 current = current.next;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
123 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
124 return false;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
125 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
126
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
127 public String toWhereClause() {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
128
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
129 StringBuilder sb = new StringBuilder();
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
130
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
131 Segment current = head;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
132
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
133 while (current != null) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
134 if (current != head) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
135 sb.append(" OR ");
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 current.toWhereClause(sb, iColumn, jColumn);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
138 current = current.next;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
140
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
141 return sb.toString();
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
142 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
143
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
144 public static Point2D.Double sub(Point2D.Double p1, Point2D.Double p2) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145 return new Point2D.Double(p1.x - p2.x, p1.y - p2.y);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
146 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
147
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
148 public static final double dot(Point2D.Double p1, Point2D.Double p2) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
149 return p1.x*p2.x + p1.y*p2.y;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
150 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152 public static final double dot(Point2D.Double p1, double x, double y) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
153 return p1.x*x + p1.y*y;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
154 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
156 public static final Point2D.Double scale(Point2D.Double p, double s) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157 return new Point2D.Double(s*p.x, s*p.y);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
159
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160 public static final Point2D.Double normalize(Point2D.Double p) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
161 double len2 = Math.sqrt(dot(p, p));
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162 return len2 > EPSILON ? scale(p, 1d/len2) : p;
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
163 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
164
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165 public static final Point2D.Double orthogonal(Point2D.Double p) {
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 return new Point2D.Double(p.y, -p.x);
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 }
555483213f78 Added buffer creator in index (i, j) space.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org