Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/XY.java @ 5084:ca45dd039b54 slt-simplify-cross-sections

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Log the number of points of cross sections to see the effect of the simplification.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 24 Feb 2013 21:38:09 +0100
parents 7bbee0cfc171
children
rev   line source
1204
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.flys.importer;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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2
4707
2b0426b79a92 Documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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3
2b0426b79a92 Documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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4 /** Two doubles and an int index. */
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5 public class XY
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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6 implements Comparable<XY>
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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7 {
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8 public static final double X_EPSILON = 1e-4;
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9
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10 protected double x;
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11 protected double y;
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12 protected int index;
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13
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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14 public XY() {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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15 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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16
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7bbee0cfc171 Added experimental Douglas Peuker simplification of cross sections.
Sascha L. Teichmann <teichmann@intevation.de>
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17 public XY(XY other) {
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18 this(other.x, other.y, other.index);
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19 }
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20
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22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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21 public XY(double x, double y, int index) {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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22 this.x = x;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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23 this.y = y;
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24 this.index = index;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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25 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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26
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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27 @Override
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28 public int compareTo(XY other) {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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29 if (x + X_EPSILON < other.x) return -1;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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30 if (x > other.x + X_EPSILON) return +1;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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31 if (index < other.index) return -1;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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32 if (index > other.index) return +1;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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33 return 0;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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34 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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35
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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36 public double getX() {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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37 return x;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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38 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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39
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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40 public void setX(double x) {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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41 this.x = x;
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42 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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43
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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44 public double getY() {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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45 return y;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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46 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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47
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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48 public void setY(double y) {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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49 this.y = y;
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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50 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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51
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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52 public int getIndex() {
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53 return index;
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54 }
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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55
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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56 public void setIndex(int index) {
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
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57 this.index = index;
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58 }
5083
7bbee0cfc171 Added experimental Douglas Peuker simplification of cross sections.
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parents: 4707
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59
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60 public double dot(double ox, double oy) {
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61 return x*ox + y*oy;
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62 }
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63
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64 public double dot(XY other) {
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65 return dot(other.x, other.y);
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66 }
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67
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68 public XY sub(XY other) {
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69 x -= other.x;
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70 y -= other.y;
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71 return this;
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72 }
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73
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74 public XY ortho() {
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75 double z = x;
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76 x = y;
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77 y = -z;
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78 return this;
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79 }
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80
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81 public XY normalize() {
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82 double len = dot(this);
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83
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84 if (len > 1e-6) {
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85 len = 1d/Math.sqrt(len);
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86 x *= len;
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87 y *= len;
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88 }
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89
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90 return this;
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91 }
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92
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93 // x*nx + y*ny + d = 0 <=> d = -x*nx -y*ny
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94 public double lineOffset(XY p) {
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95 return -x*p.x -y*p.y;
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96 }
1204
22858e7cca79 Integrated PRF parsing into importer. Needs testing!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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97 }
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98 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org