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22 package org.hipparchus.geometry.spherical.twod;
23
24 import org.hipparchus.geometry.euclidean.threed.Rotation;
25 import org.hipparchus.geometry.euclidean.threed.Vector3D;
26 import org.hipparchus.geometry.partitioning.RegionFactory;
27 import org.hipparchus.geometry.partitioning.Side;
28 import org.hipparchus.geometry.partitioning.SubHyperplane.SplitSubHyperplane;
29 import org.hipparchus.geometry.spherical.oned.ArcsSet;
30 import org.hipparchus.geometry.spherical.oned.Sphere1D;
31 import org.hipparchus.util.MathUtils;
32 import org.junit.Assert;
33 import org.junit.Test;
34
35 public class SubCircleTest {
36
37 @Test
38 public void testFullCircle() {
39 Circle circle = new Circle(Vector3D.PLUS_K, 1.0e-10);
40 SubCircle set = circle.wholeHyperplane();
41 Assert.assertEquals(MathUtils.TWO_PI, set.getSize(), 1.0e-10);
42 Assert.assertTrue(circle == set.getHyperplane());
43 Assert.assertTrue(circle != set.copySelf().getHyperplane());
44 }
45
46 @Test
47 public void testSide() {
48
49 Circle xzPlane = new Circle(Vector3D.PLUS_J, 1.0e-10);
50
51 SubCircle sc1 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0, 5.0, 6.0);
52 Assert.assertEquals(Side.BOTH, sc1.split(xzPlane).getSide());
53
54 SubCircle sc2 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0);
55 Assert.assertEquals(Side.MINUS, sc2.split(xzPlane).getSide());
56
57 SubCircle sc3 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 5.0, 6.0);
58 Assert.assertEquals(Side.PLUS, sc3.split(xzPlane).getSide());
59
60 SubCircle sc4 = create(Vector3D.PLUS_J, Vector3D.PLUS_K, Vector3D.PLUS_I, 1.0e-10, 5.0, 6.0);
61 Assert.assertEquals(Side.HYPER, sc4.split(xzPlane).getSide());
62
63 SubCircle sc5 = create(Vector3D.MINUS_J, Vector3D.PLUS_I, Vector3D.PLUS_K, 1.0e-10, 5.0, 6.0);
64 Assert.assertEquals(Side.HYPER, sc5.split(xzPlane).getSide());
65
66 }
67
68 @Test
69 public void testSPlit() {
70
71 Circle xzPlane = new Circle(Vector3D.PLUS_J, 1.0e-10);
72
73 SubCircle sc1 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0, 5.0, 6.0);
74 SplitSubHyperplane<Sphere2D> split1 = sc1.split(xzPlane);
75 ArcsSet plus1 = (ArcsSet) ((SubCircle) split1.getPlus()).getRemainingRegion();
76 ArcsSet minus1 = (ArcsSet) ((SubCircle) split1.getMinus()).getRemainingRegion();
77 Assert.assertEquals(1, plus1.asList().size());
78 Assert.assertEquals(5.0, plus1.asList().get(0).getInf(), 1.0e-10);
79 Assert.assertEquals(6.0, plus1.asList().get(0).getSup(), 1.0e-10);
80 Assert.assertEquals(1, minus1.asList().size());
81 Assert.assertEquals(1.0, minus1.asList().get(0).getInf(), 1.0e-10);
82 Assert.assertEquals(3.0, minus1.asList().get(0).getSup(), 1.0e-10);
83
84 SubCircle sc2 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 1.0, 3.0);
85 SplitSubHyperplane<Sphere2D> split2 = sc2.split(xzPlane);
86 Assert.assertNull(split2.getPlus());
87 ArcsSet minus2 = (ArcsSet) ((SubCircle) split2.getMinus()).getRemainingRegion();
88 Assert.assertEquals(1, minus2.asList().size());
89 Assert.assertEquals(1.0, minus2.asList().get(0).getInf(), 1.0e-10);
90 Assert.assertEquals(3.0, minus2.asList().get(0).getSup(), 1.0e-10);
91
92 SubCircle sc3 = create(Vector3D.PLUS_K, Vector3D.PLUS_I, Vector3D.PLUS_J, 1.0e-10, 5.0, 6.0);
93 SplitSubHyperplane<Sphere2D> split3 = sc3.split(xzPlane);
94 ArcsSet plus3 = (ArcsSet) ((SubCircle) split3.getPlus()).getRemainingRegion();
95 Assert.assertEquals(1, plus3.asList().size());
96 Assert.assertEquals(5.0, plus3.asList().get(0).getInf(), 1.0e-10);
97 Assert.assertEquals(6.0, plus3.asList().get(0).getSup(), 1.0e-10);
98 Assert.assertNull(split3.getMinus());
99
100 SubCircle sc4 = create(Vector3D.PLUS_J, Vector3D.PLUS_K, Vector3D.PLUS_I, 1.0e-10, 5.0, 6.0);
101 SplitSubHyperplane<Sphere2D> split4 = sc4.split(xzPlane);
102 Assert.assertEquals(Side.HYPER, sc4.split(xzPlane).getSide());
103 Assert.assertNull(split4.getPlus());
104 Assert.assertNull(split4.getMinus());
105
106 SubCircle sc5 = create(Vector3D.MINUS_J, Vector3D.PLUS_I, Vector3D.PLUS_K, 1.0e-10, 5.0, 6.0);
107 SplitSubHyperplane<Sphere2D> split5 = sc5.split(xzPlane);
108 Assert.assertEquals(Side.HYPER, sc5.split(xzPlane).getSide());
109 Assert.assertNull(split5.getPlus());
110 Assert.assertNull(split5.getMinus());
111
112 }
113
114 @Test
115 public void testSideSplitConsistency() {
116
117 double tolerance = 1.0e-6;
118 Circle hyperplane = new Circle(new Vector3D(9.738804529764676E-5, -0.6772824575010357, -0.7357230887208355),
119 tolerance);
120 SubCircle sub = new SubCircle(new Circle(new Vector3D(2.1793884139073498E-4, 0.9790647032675541, -0.20354915700704285),
121 tolerance),
122 new ArcsSet(4.7121441684170700, 4.7125386635004760, tolerance));
123 SplitSubHyperplane<Sphere2D> split = sub.split(hyperplane);
124 Assert.assertNotNull(split.getMinus());
125 Assert.assertNull(split.getPlus());
126 Assert.assertEquals(Side.MINUS, sub.split(hyperplane).getSide());
127
128 }
129
130 private SubCircle create(Vector3D pole, Vector3D x, Vector3D y,
131 double tolerance, double ... limits) {
132 RegionFactory<Sphere1D> factory = new RegionFactory<Sphere1D>();
133 Circle circle = new Circle(pole, tolerance);
134 Circle phased =
135 (Circle) Circle.getTransform(new Rotation(circle.getXAxis(), circle.getYAxis(), x, y)).apply(circle);
136 ArcsSet set = (ArcsSet) factory.getComplement(new ArcsSet(tolerance));
137 for (int i = 0; i < limits.length; i += 2) {
138 set = (ArcsSet) factory.union(set, new ArcsSet(limits[i], limits[i + 1], tolerance));
139 }
140 return new SubCircle(phased, set);
141 }
142
143 }