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17 package org.apache.commons.geometry.euclidean.twod;
18
19 import java.util.ArrayList;
20 import java.util.Arrays;
21 import java.util.List;
22
23 import org.apache.commons.geometry.core.GeometryTestUtils;
24 import org.apache.commons.numbers.core.Precision;
25 import org.junit.jupiter.api.Assertions;
26 import org.junit.jupiter.api.Test;
27
28 class LinecastPoint2DTest {
29
30 private static final double TEST_EPS = 1e-10;
31
32 private static final Precision.DoubleEquivalence TEST_PRECISION =
33 Precision.doubleEquivalenceOfEpsilon(TEST_EPS);
34
35 private static final Line X_AXIS =
36 Lines.fromPointAndDirection(Vector2D.ZERO, Vector2D.Unit.PLUS_X, TEST_PRECISION);
37
38 private static final Line Y_AXIS =
39 Lines.fromPointAndDirection(Vector2D.ZERO, Vector2D.Unit.PLUS_Y, TEST_PRECISION);
40
41 @Test
42 void testProperties() {
43
44 final Vector2D pt = Vector2D.of(1, 1);
45 final Vector2D normal = Vector2D.Unit.PLUS_X;
46
47 final LinecastPoint2D it = new LinecastPoint2D(pt, normal, X_AXIS);
48
49
50 Assertions.assertSame(pt, it.getPoint());
51 Assertions.assertSame(normal, it.getNormal());
52 Assertions.assertSame(X_AXIS, it.getLine());
53 Assertions.assertEquals(1.0, it.getAbscissa(), TEST_EPS);
54 }
55
56 @Test
57 void testAbscissaOrder() {
58
59 final LinecastPoint2D a = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
60
61 final LinecastPoint2D b = new LinecastPoint2D(Vector2D.of(2, 2), Vector2D.Unit.PLUS_X, X_AXIS);
62 final LinecastPoint2D c = new LinecastPoint2D(Vector2D.of(-3, 3), Vector2D.Unit.PLUS_Y, X_AXIS);
63 final LinecastPoint2D d = new LinecastPoint2D(Vector2D.of(1, 4), Vector2D.Unit.PLUS_Y, X_AXIS);
64 final LinecastPoint2D e = new LinecastPoint2D(Vector2D.of(1, 4), Vector2D.Unit.PLUS_X, X_AXIS);
65
66
67 Assertions.assertEquals(-1, LinecastPoint2D.ABSCISSA_ORDER.compare(a, b));
68 Assertions.assertEquals(1, LinecastPoint2D.ABSCISSA_ORDER.compare(a, c));
69 Assertions.assertEquals(1, LinecastPoint2D.ABSCISSA_ORDER.compare(a, d));
70 Assertions.assertEquals(0, LinecastPoint2D.ABSCISSA_ORDER.compare(a, e));
71 }
72
73 @Test
74 void testHashCode() {
75
76 final LinecastPoint2D a = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
77 final LinecastPoint2D b = new LinecastPoint2D(Vector2D.of(2, 2), Vector2D.Unit.PLUS_X, X_AXIS);
78 final LinecastPoint2D c = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_Y, X_AXIS);
79 final LinecastPoint2D d = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, Y_AXIS);
80 final LinecastPoint2D e = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
81
82
83 final int hash = a.hashCode();
84
85
86 Assertions.assertEquals(hash, a.hashCode());
87
88 Assertions.assertNotEquals(hash, b.hashCode());
89 Assertions.assertNotEquals(hash, c.hashCode());
90 Assertions.assertNotEquals(hash, d.hashCode());
91
92 Assertions.assertEquals(hash, e.hashCode());
93 }
94
95 @Test
96 void testEquals() {
97
98 final LinecastPoint2D a = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
99 final LinecastPoint2D b = new LinecastPoint2D(Vector2D.of(2, 2), Vector2D.Unit.PLUS_X, X_AXIS);
100 final LinecastPoint2D c = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_Y, X_AXIS);
101 final LinecastPoint2D d = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, Y_AXIS);
102 final LinecastPoint2D e = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
103
104
105 GeometryTestUtils.assertSimpleEqualsCases(a);
106
107 Assertions.assertNotEquals(a, b);
108 Assertions.assertNotEquals(a, c);
109 Assertions.assertNotEquals(a, d);
110
111 Assertions.assertEquals(a, e);
112 Assertions.assertEquals(e, a);
113 }
114
115 @Test
116 void testEq() {
117
118 final Precision.DoubleEquivalence precision = Precision.doubleEquivalenceOfEpsilon(1e-2);
119
120 final Line line = Lines.fromPointAndDirection(Vector2D.ZERO, Vector2D.Unit.PLUS_X, precision);
121 final Line otherLine = Lines.fromPointAndDirection(Vector2D.of(1e-4, 1e-4), Vector2D.Unit.PLUS_X, precision);
122
123 final LinecastPoint2D a = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, line);
124
125 final LinecastPoint2D b = new LinecastPoint2D(Vector2D.of(2, 2), Vector2D.Unit.PLUS_X, line);
126 final LinecastPoint2D c = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_Y, line);
127
128 final LinecastPoint2D d = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, line);
129 final LinecastPoint2D e = new LinecastPoint2D(
130 Vector2D.of(1 + 1e-3, 1 + 1e-3), Vector2D.Unit.from(1 + 1e-3, 1e-3), otherLine);
131
132
133 Assertions.assertTrue(a.eq(a, precision));
134
135 Assertions.assertFalse(a.eq(b, precision));
136 Assertions.assertFalse(a.eq(c, precision));
137
138 Assertions.assertTrue(a.eq(d, precision));
139 Assertions.assertTrue(a.eq(e, precision));
140 }
141
142 @Test
143 void testToString() {
144
145 final LinecastPoint2D it = new LinecastPoint2D(Vector2D.of(1, 1), Vector2D.Unit.PLUS_X, X_AXIS);
146
147
148 final String str = it.toString();
149
150
151 GeometryTestUtils.assertContains("LinecastPoint2D[point= (1.0, 1.0), normal= (1.0, 0.0)", str);
152 }
153
154 @Test
155 void testSortAndFilter_empty() {
156
157 final List<LinecastPoint2D> pts = new ArrayList<>();
158
159
160 LinecastPoint2D.sortAndFilter(pts);
161
162
163 Assertions.assertEquals(0, pts.size());
164 }
165
166 @Test
167 void testSortAndFilter() {
168
169 final Precision.DoubleEquivalence precision = Precision.doubleEquivalenceOfEpsilon(1e-2);
170
171 final Line line = Lines.fromPointAndDirection(Vector2D.ZERO, Vector2D.Unit.PLUS_X, precision);
172 final Line eqLine = Lines.fromPointAndDirection(Vector2D.of(1e-3, 1e-3), Vector2D.Unit.PLUS_X, precision);
173 final Line diffLine = Lines.fromPointAndDirection(Vector2D.ZERO, Vector2D.Unit.PLUS_Y, precision);
174
175 final LinecastPoint2D a = new LinecastPoint2D(Vector2D.ZERO, Vector2D.Unit.MINUS_Y, line);
176 final LinecastPoint2D aDup1 = new LinecastPoint2D(Vector2D.of(1e-3, 0), Vector2D.Unit.MINUS_Y, line);
177 final LinecastPoint2D aDup2 = new LinecastPoint2D(Vector2D.of(1e-3, 1e-3), Vector2D.of(1e-3, -1), eqLine);
178
179 final LinecastPoint2D b = new LinecastPoint2D(Vector2D.ZERO, Vector2D.Unit.MINUS_X, diffLine);
180 final LinecastPoint2D bDup = new LinecastPoint2D(Vector2D.of(-1e-3, 1e-4), Vector2D.Unit.MINUS_X, diffLine);
181
182 final LinecastPoint2D c = new LinecastPoint2D(Vector2D.of(0.5, 0), Vector2D.Unit.MINUS_Y, line);
183
184 final LinecastPoint2D d = new LinecastPoint2D(Vector2D.of(1, 0), Vector2D.Unit.MINUS_Y, line);
185
186 final List<LinecastPoint2D> list = new ArrayList<>(Arrays.asList(d, aDup1, bDup, b, c, a, aDup2));
187
188
189 LinecastPoint2D.sortAndFilter(list);
190
191
192 Assertions.assertEquals(4, list.size());
193
194 Assertions.assertSame(b, list.get(0));
195 Assertions.assertSame(a, list.get(1));
196 Assertions.assertSame(c, list.get(2));
197 Assertions.assertSame(d, list.get(3));
198 }
199 }