Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/Utils.java @ 4655:cd44d28d0fbc
Move the access to artifact data to the Access object
Use BedHeightAccess class to receive the data from the artifact. This abstracts
the data access from the actual artifact.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 11 Dec 2012 09:44:04 +0100 |
parents | 5cc9453456a7 |
children | b195fede1c3b |
rev | line source |
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4259
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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1 package de.intevation.flys.artifacts.math; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
2 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
3 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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4 public final class Utils { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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5 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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6 public static final double EPSILON = 1e-3; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
7 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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8 private Utils() { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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9 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
10 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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11 public static final boolean epsilonEquals(double a, double b) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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12 return epsilonEquals(a, b, EPSILON); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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13 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
14 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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15 public static final boolean epsilonEquals(double a, double b, double eps) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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16 return Math.abs(a - b) < eps; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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17 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
18 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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19 public static int relativeCCW( |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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20 double x1, double y1, |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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21 double x2, double y2, |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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22 double px, double py |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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23 ) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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24 if ((epsilonEquals(x1, x2) && epsilonEquals(y1, y2)) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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25 || ((epsilonEquals(x1, px) && epsilonEquals(y1, py)))) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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26 return 0; // Coincident points. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
27 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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28 // Translate to the origin. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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29 x2 -= x1; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
30 y2 -= y1; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
31 px -= x1; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
32 py -= y1; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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33 double slope2 = y2 / x2; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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34 double slopep = py / px; |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
35 if (epsilonEquals(slope2, slopep) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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36 || (epsilonEquals(x2, 0.0) && epsilonEquals(px, 0.0))) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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37 return y2 > EPSILON // Colinear. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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38 ? (py < -EPSILON ? -1 : py > y2 ? 1 : 0) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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39 : (py > -EPSILON ? -1 : py < y2 ? 1 : 0); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
40 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
41 if (x2 >= EPSILON && slope2 >= EPSILON) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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42 return px >= EPSILON // Quadrant 1. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
43 ? (slope2 > slopep ? 1 : -1) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
44 : (slope2 < slopep ? 1 : -1); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
45 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
46 |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
47 if (y2 > EPSILON) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
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48 return px < -EPSILON // Quadrant 2. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
49 ? (slope2 > slopep ? 1 : -1) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
50 : (slope2 < slopep ? 1 : -1); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
51 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
52 if (slope2 >= EPSILON) { |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
53 return px >= EPSILON // Quadrant 3. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
54 ? (slope2 < slopep ? 1 : -1) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
55 : (slope2 > slopep ? 1 : -1); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
56 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
57 return px < -EPSILON // Quadrant 4. |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
58 ? (slope2 < slopep ? 1 : -1) |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
59 : (slope2 > slopep ? 1 : -1); |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
60 } |
5cc9453456a7
First complete but untested version of the 'Auslagerung extremer Wasserspiegellagen' calculation.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff
changeset
|
61 } |