Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/java2d/ShapeUtils.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
5863
4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
5831
bd047b71ab37 Repaired internal references
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9 package org.dive4elements.river.java2d;
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10
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11 import java.awt.Shape;
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12
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13 import java.awt.geom.AffineTransform;
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14 import java.awt.geom.Ellipse2D;
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15 import java.awt.geom.GeneralPath;
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16 import java.awt.geom.Rectangle2D;
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17
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18 import java.util.HashMap;
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19 import java.util.Map;
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20
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21 public class ShapeUtils
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22 {
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23 // TODO: Use enum
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24 public static final int MEASURED = 0;
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25 public static final int DIGITIZED = 1;
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26 public static final int INTERPOLATED = 2;
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27
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28 public static final boolean DIGITIZED_FILL = false;
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29 public static final boolean MEASURED_FILL = true;
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30 public static final boolean INTERPOLATED_FILL = false;
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31
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32 public static final Shape DIGITIZED_SHAPE =
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33 createCross(4f);
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34
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35 public static final Shape MEASURED_SHAPE =
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36 new Rectangle2D.Double(-2, -2, 4, 4);
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37
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38 public static final Shape INTERPOLATED_SHAPE =
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39 new Ellipse2D.Double(-2, -2, 4, 4);
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40
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41 protected static Map<Long, Shape> scaledShapesCache =
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42 new HashMap<Long, Shape>();
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43
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44 public static final Shape createCross(float size) {
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45 float half = size * 0.5f;
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46 GeneralPath p = new GeneralPath();
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47 p.moveTo(-half, -half);
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48 p.lineTo(half, half);
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49 p.closePath();
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50 p.moveTo(-half, half);
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51 p.lineTo(half, -half);
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52 p.closePath();
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53 return p;
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54 }
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55
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56 public static Shape scale(Shape shape, float factor) {
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57 if (factor == 1f) {
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58 return shape;
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59 }
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60 AffineTransform xform =
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61 AffineTransform.getScaleInstance(factor, factor);
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62
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63 GeneralPath gp = new GeneralPath(shape);
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64 return gp.createTransformedShape(xform);
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65 }
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66
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67 public static synchronized Shape getScaledShape(int type, float size) {
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68
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69 Long hash = Long.valueOf(
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70 (((long)type) << 32) | Float.floatToIntBits(size));
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71
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72 Shape shape = scaledShapesCache.get(hash);
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73
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74 if (shape == null) {
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75 switch (type) {
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76 case MEASURED:
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77 shape = MEASURED_SHAPE;
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78 break;
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79 case DIGITIZED:
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80 shape = DIGITIZED_SHAPE;
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81 break;
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82 default:
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83 shape = INTERPOLATED_SHAPE;
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84 }
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85 scaledShapesCache.put(hash, shape = scale(shape, size));
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86 }
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87
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88 return shape;
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89 }
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90 }
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91 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org