Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/java2d/ShapeUtils.java @ 3301:c8f670ae96e8
Create extent of a map layer in the correct coordinate reference system.
flys-artifacts/trunk@4986 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 13 Jul 2012 10:25:24 +0000 |
parents | 0d8146989012 |
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0d8146989012
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1 package de.intevation.flys.java2d; |
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2 |
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3 import java.awt.Shape; |
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4 |
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5 import java.awt.geom.AffineTransform; |
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6 import java.awt.geom.Ellipse2D; |
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7 import java.awt.geom.GeneralPath; |
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8 import java.awt.geom.Rectangle2D; |
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9 |
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10 import java.util.HashMap; |
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11 import java.util.Map; |
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12 |
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13 public class ShapeUtils |
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14 { |
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15 // TODO: Use enum |
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16 public static final int MEASURED = 0; |
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17 public static final int DIGITIZED = 1; |
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18 public static final int INTERPOLATED = 2; |
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19 |
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20 public static final boolean DIGITIZED_FILL = false; |
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21 public static final boolean MEASURED_FILL = true; |
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22 public static final boolean INTERPOLATED_FILL = false; |
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23 |
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24 public static final Shape DIGITIZED_SHAPE = |
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25 createCross(4f); |
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26 |
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27 public static final Shape MEASURED_SHAPE = |
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28 new Rectangle2D.Double(-2, -2, 4, 4); |
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29 |
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30 public static final Shape INTERPOLATED_SHAPE = |
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31 new Ellipse2D.Double(-2, -2, 4, 4); |
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32 |
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33 protected static Map<Long, Shape> scaledShapesCache = |
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34 new HashMap<Long, Shape>(); |
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35 |
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36 public static final Shape createCross(float size) { |
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37 float half = size * 0.5f; |
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38 GeneralPath p = new GeneralPath(); |
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39 p.moveTo(-half, -half); |
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40 p.lineTo(half, half); |
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41 p.closePath(); |
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42 p.moveTo(-half, half); |
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43 p.lineTo(half, -half); |
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44 p.closePath(); |
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45 return p; |
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46 } |
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47 |
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48 public static Shape scale(Shape shape, float factor) { |
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49 if (factor == 1f) { |
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50 return shape; |
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51 } |
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52 AffineTransform xform = |
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53 AffineTransform.getScaleInstance(factor, factor); |
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54 |
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55 GeneralPath gp = new GeneralPath(shape); |
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56 return gp.createTransformedShape(xform); |
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57 } |
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58 |
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59 public static synchronized Shape getScaledShape(int type, float size) { |
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60 |
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61 Long hash = Long.valueOf( |
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62 (((long)type) << 32) | Float.floatToIntBits(size)); |
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63 |
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64 Shape shape = scaledShapesCache.get(hash); |
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65 |
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66 if (shape == null) { |
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67 switch (type) { |
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68 case MEASURED: |
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69 shape = MEASURED_SHAPE; |
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70 break; |
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71 case DIGITIZED: |
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72 shape = DIGITIZED_SHAPE; |
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73 break; |
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74 default: |
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75 shape = INTERPOLATED_SHAPE; |
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76 } |
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77 scaledShapesCache.put(hash, shape = scale(shape, size)); |
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78 } |
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79 |
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80 return shape; |
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81 } |
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82 } |
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83 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |