Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/math/Interpolation2D.java @ 794:d0967fdee36f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Repaired JavaDoc in Export package. gnv-artifacts/trunk@876 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 31 Mar 2010 12:18:03 +0000
parents c4156275c1e1
children 6cff63d0c434
rev   line source
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.gnv.math;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 import com.vividsolutions.jts.geom.Coordinate;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4 import com.vividsolutions.jts.geom.Envelope;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
5
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
6 import com.vividsolutions.jts.index.strtree.STRtree;
501
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
7
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
8 import java.util.List;
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
9
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
10 import org.apache.log4j.Logger;
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
11
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
12 /**
780
c4156275c1e1 Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 778
diff changeset
13 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
14 */
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
15 public final class Interpolation2D
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
16 {
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
17 private static Logger log = Logger.getLogger(Interpolation2D.class);
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
18
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
19 public static final int CULL_POINT_THRESHOLD = Integer.getInteger(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
20 "gnv.interpolation2d.cull.point.threshold", 1000);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
21
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
22 public static final double EPS = 1e-6d;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
23
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
24 public interface Consumer {
416
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
25 void interpolated(Coordinate point, boolean success);
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
26 } // interface Consumer
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
27
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
28 private Interpolation2D() {
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
30
528
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
31 public static final Envelope relevantArea(
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
32 List<? extends Coordinate> path,
528
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
33 List<? extends Coordinate> points
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
34 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
35 return relevantArea(path, points, CULL_POINT_THRESHOLD);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
36 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
37
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
38 public static final Envelope relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
39 Envelope pathBBox,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
40 List<? extends Coordinate> points
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
41 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
42 return relevantArea(pathBBox, points, CULL_POINT_THRESHOLD);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
43 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
44
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
45 public static final Envelope relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
46 Envelope pathBBox,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
47 List<? extends Coordinate> points,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
48 int threshold
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
49 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
50 return points.size() < threshold
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
51 ? null
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
52 : relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
53 pathBBox,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
54 pointsBoundingBox(points));
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
55 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
56
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
57 public static final Envelope relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
58 List<? extends Coordinate> path,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
59 List<? extends Coordinate> points,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
60 int threshold
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
61 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
62 return points.size() < threshold || path.isEmpty()
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
63 ? null
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
64 : relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
65 pointsBoundingBox(path),
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
66 pointsBoundingBox(points));
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
67 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
68
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
69 public static final Envelope relevantArea(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
70 Envelope pathBBox,
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
71 Envelope pointsBBox
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
72 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
73 double pathArea = pathBBox.getWidth()*pathBBox.getHeight();
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
74 double pointsArea = pointsBBox.getWidth()*pointsBBox.getHeight();
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
75
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
76 if (pathArea > 0.8d*pointsArea) { return null; }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
77
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
78 double nArea = 1.44d * pathArea;
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
79 if (nArea < 0.1d*pointsArea) nArea = 0.1d*pointsArea;
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
80 double w = pathBBox.getWidth();
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
81 double h = pathBBox.getHeight();
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
82 double [] d = solveQuadratic(1d, w+h, pathArea - nArea);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
83
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
84 if (d == null) { return null; }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
85
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
86 double extra = pos(d);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
87
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
88 pathBBox.expandBy(extra);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
89
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
90 return pathBBox;
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
91 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
92
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
93 public static final double [] solveQuadratic(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
94 double a, double b, double c
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
95 ) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
96 double d = b*b - 4d*a*c;
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
97 if (d < 0d) { return null; }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
98
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
99 d = Math.sqrt(d);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
100 a = 1d/(2d*a);
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
101 b = -b;
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
102
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
103 return new double [] { a*(b + d), a*(b - d) };
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
104 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
105
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
106 public static final double pos(double [] x) {
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
107 return x[0] >= 0 ? x[0] : x[1];
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
108 }
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
109
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
110
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
111 public static Envelope pointsBoundingBox(
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
112 List<? extends Coordinate> path
501
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
113 ) {
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
114 int N = path.size();
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
115 Envelope area = new Envelope(path.get(N-1));
501
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
116
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
117 for (int i = N-2; i >= 0; --i) {
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
118 area.expandToInclude(path.get(i));
501
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
119 }
70adafe2b9d5 Speed up the "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 474
diff changeset
120
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
121 return area;
431
422275fc9927 Refactored the XYColumn and Point2d code a bit to be more reusable in 3D.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 416
diff changeset
122 }
422275fc9927 Refactored the XYColumn and Point2d code a bit to be more reusable in 3D.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 416
diff changeset
123
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
124 public static void interpolate(
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
125 List<? extends Coordinate> path,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
126 List<? extends Point2d> points,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
127 double from,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
128 double to,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
129 int steps,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
130 Metrics metrics,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
131 Consumer consumer
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
132 ) {
434
0eed5749fd63 Implemented the raster interpolation for the 'Profilschnitt'.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 431
diff changeset
133 boolean debug = log.isDebugEnabled();
0eed5749fd63 Implemented the raster interpolation for the 'Profilschnitt'.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 431
diff changeset
134
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
135 int N = path.size();
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136 int M = points.size();
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137
434
0eed5749fd63 Implemented the raster interpolation for the 'Profilschnitt'.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 431
diff changeset
138 if (debug) {
416
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
139 log.debug("Size of path: " + N);
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
140 log.debug("Size of points: " + M);
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
141 }
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
142
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
143 if (M < 1 || N < 2) { // nothing to do
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
144 return;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145 }
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
146
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
147 List<GridCell> cells = GridCell.pointsToGridCells(
528
44415ae01ddb Fixed issue gnv/issue159
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
148 points, relevantArea(path, points));
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
149
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
150 if (cells.isEmpty()) {
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
151 log.warn("no cells found");
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
152 return;
416
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
153 }
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
154
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155 // put into spatial index to speed up finding neighbors.
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
156 STRtree spatialIndex = new STRtree();
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
158 for (GridCell cell: cells) {
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
159 spatialIndex.insert(cell.getEnvelope(), cell);
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
161
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162 LinearToMap linearToMap = new LinearToMap(
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
163 path, from, to, metrics);
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
164
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165 double dP = (to - from)/steps;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
167 Coordinate center = new Coordinate();
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
168 Envelope queryBuffer = new Envelope();
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
169 GridCell.CellFinder finder = new GridCell.CellFinder();
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
170
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
171 int missedInterpolations = 0;
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
172 int interpolations = 0;
474
ab29e4ff2fda Added area interpolation needed for "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 445
diff changeset
173
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
174 for (double p = from; p <= to; p += dP) {
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 if (!linearToMap.locate(p, center)) {
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176 continue;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178 queryBuffer.init(
778
9a828e5a2390 Removed trailing whitespace
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 528
diff changeset
179 center.x - EPS, center.x + EPS,
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
180 center.y - EPS, center.y + EPS);
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
181
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
182 finder.prepare(center);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
183 spatialIndex.query(queryBuffer, finder);
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
185 GridCell found = finder.found;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
186
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
187 if (found == null) {
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
188 consumer.interpolated(center, false);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
189 ++missedInterpolations;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
190 continue;
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
191 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
192
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
193 Point2d n0 = found.p1;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
194 Point2d n1 = found.p2;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
195 Point2d n2 = found.p3;
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
196 Point2d n3 = found.p4;
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
197
519
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
198 double z1 = interpolate(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
199 n0.x, n0.z,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
200 n1.x, n1.z,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
201 center.x);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
202 double z2 = interpolate(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
203 n2.x, n2.z,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
204 n3.x, n3.z,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
205 center.x);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
206 double y1 = interpolate(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
207 n0.x, n0.y,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
208 n1.x, n1.y,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
209 center.x);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
210 double y2 = interpolate(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
211 n2.x, n2.y,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
212 n3.x, n3.y,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
213 center.x);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
214 center.z = interpolate(
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
215 y1, z1,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
216 y2, z2,
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
217 center.y);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
218 consumer.interpolated(center, true);
4e347624ee7c Last part to fix gnv/issue153. Now 'Profilschnitte', 'Horizontalschnitte' and 'horizontale Schnittprofile'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
219 ++interpolations;
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220 }
365
f66088a43ecc Added horizontal crossprofile charts to chart pallet. Fixed some bugs before interpolation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 361
diff changeset
221
434
0eed5749fd63 Implemented the raster interpolation for the 'Profilschnitt'.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 431
diff changeset
222 if (debug) {
778
9a828e5a2390 Removed trailing whitespace
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 528
diff changeset
223 log.debug("interpolations: " +
416
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
224 interpolations + " / " + missedInterpolations);
04a242c67fe6 Added support of gap detection in horizontalcrossprofile charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 366
diff changeset
225 }
361
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
226 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228 public static final double interpolate(
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
229 double x1, double y1,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230 double x2, double y2,
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 double x
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
232 ) {
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
233 if (x2 == x1) {
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
234 return (y1 + y2)*0.5d;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
235 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236 double m = (y2-y1)/(x2-x1);
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 double b = y1 - m*x1;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
238 return m*x + b;
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
239 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
240 }
aec85d00d82c Added code to do 2D interpolations along a digitied track on the map.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
241 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org