1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 package org.apache.commons.geometry.examples.tutorials.bsp;
18
19 import java.io.File;
20 import java.util.Arrays;
21
22 import org.apache.commons.geometry.euclidean.twod.Bounds2D;
23 import org.apache.commons.geometry.euclidean.twod.RegionBSPTree2D;
24 import org.apache.commons.geometry.euclidean.twod.Vector2D;
25 import org.apache.commons.geometry.euclidean.twod.path.LinePath;
26 import org.apache.commons.numbers.core.Precision;
27
28
29
30
31 public final class HexagonPartitionedRegion {
32
33
34 private HexagonPartitionedRegion() {}
35
36
37
38
39
40 public static void main(final String[] args) {
41 final File outputFolder = new File(args.length > 0 ? args[0] : ".");
42 final BSPTreeSVGWriter svgWriter = new BSPTreeSVGWriter(Bounds2D.from(Vector2D.of(-8, -8), Vector2D.of(8, 8)));
43
44 final Precision.DoubleEquivalence precision = Precision.doubleEquivalenceOfEpsilon(1e-6);
45
46 final LinePath path = LinePath.fromVertexLoop(Arrays.asList(
47 Vector2D.of(-4, 0),
48 Vector2D.of(-2, -3),
49 Vector2D.of(2, -3),
50 Vector2D.of(4, 0),
51 Vector2D.of(2, 3),
52 Vector2D.of(-2, 3)
53 ), precision);
54
55 final RegionBSPTree2D tree = RegionBSPTree2D.partitionedRegionBuilder()
56 .insertAxisAlignedGrid(path.getBounds(), 1, precision)
57 .insertBoundaries(path)
58 .build();
59
60 svgWriter.write(tree, new File(outputFolder, "hex-partitioned.svg"));
61 }
62 }