| 1 | """ Test for the geometry classes. |
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| 2 | |
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| 3 | Pylint quality rating as of June 2010: 8.51/10. |
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| 4 | """ |
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| 5 | |
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| 6 | import unittest |
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| 7 | |
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| 8 | from aabb import AABB |
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| 9 | from quad import Cell |
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| 10 | |
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| 11 | #------------------------------------------------------------- |
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| 12 | |
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| 13 | class Test_Geometry(unittest.TestCase): |
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| 14 | """ Test geometry classes. """ |
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| 15 | def setUp(self): |
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| 16 | """ Generic set up for geometry tests. """ |
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| 17 | pass |
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| 18 | |
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| 19 | def tearDown(self): |
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| 20 | """ Generic shut down for geometry tests. """ |
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| 21 | pass |
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| 22 | |
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| 23 | def test_aabb_contains(self): |
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| 24 | """ Test if point is correctly classified as falling inside or |
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| 25 | outside of bounding box. """ |
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| 26 | box = AABB(1, 21, 1, 11) |
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| 27 | assert box.contains([10, 5]) |
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| 28 | assert box.contains([1, 1]) |
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| 29 | assert box.contains([20, 6]) |
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| 30 | assert not box.contains([-1, -1]) |
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| 31 | assert not box.contains([5, 70]) |
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| 32 | assert not box.contains([6, -70]) |
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| 33 | assert not box.contains([-1, 6]) |
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| 34 | assert not box.contains([50, 6]) |
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| 35 | |
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| 36 | def test_aabb_split_vert(self): |
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| 37 | """ Test that a bounding box can be split correctly along an axis. |
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| 38 | """ |
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| 39 | parent = AABB(1, 21, 1, 11) |
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| 40 | |
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| 41 | child1, child2 = parent.split(0.6) |
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| 42 | |
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| 43 | self.assertEqual(child1.xmin, 1) |
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| 44 | self.assertEqual(child1.xmax, 13) |
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| 45 | self.assertEqual(child1.ymin, 1) |
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| 46 | self.assertEqual(child1.ymax, 11) |
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| 47 | |
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| 48 | self.assertEqual(child2.xmin, 9) |
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| 49 | self.assertEqual(child2.xmax, 21) |
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| 50 | self.assertEqual(child2.ymin, 1) |
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| 51 | self.assertEqual(child2.ymax, 11) |
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| 52 | |
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| 53 | def test_aabb_split_horiz(self): |
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| 54 | """ Test that a bounding box will be split along the horizontal axis |
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| 55 | correctly. """ |
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| 56 | parent = AABB(1, 11, 1, 41) |
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| 57 | |
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| 58 | child1, child2 = parent.split(0.6) |
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| 59 | |
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| 60 | self.assertEqual(child1.xmin, 1) |
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| 61 | self.assertEqual(child1.xmax, 11) |
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| 62 | self.assertEqual(child1.ymin, 1) |
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| 63 | self.assertEqual(child1.ymax, 25) |
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| 64 | |
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| 65 | self.assertEqual(child2.xmin, 1) |
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| 66 | self.assertEqual(child2.xmax, 11) |
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| 67 | self.assertEqual(child2.ymin, 17) |
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| 68 | self.assertEqual(child2.ymax, 41) |
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| 69 | |
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| 70 | def test_add_data(self): |
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| 71 | """ Test add and retrieve arbitrary data from tree structure. """ |
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| 72 | cell = Cell(AABB(0, 10, 0, 5), None) |
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| 73 | cell.insert([(AABB(1, 3, 1, 3), 111), (AABB(8, 9, 1, 2), 222), \ |
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| 74 | (AABB(7, 8, 3, 4), 333), (AABB(1, 10, 0, 1), 444)]) |
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| 75 | |
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| 76 | result = cell.retrieve() |
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| 77 | assert isinstance(result, (list, tuple)), 'should be a list' |
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| 78 | |
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| 79 | self.assertEqual(len(result), 4) |
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| 80 | |
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| 81 | def test_search(self): |
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| 82 | """ Test search tree for an intersection. """ |
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| 83 | test_tag = 222 |
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| 84 | cell = Cell(AABB(0, 10, 0,5), None) |
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| 85 | cell.insert([(AABB(1, 3, 1, 3), 111), (AABB(8, 9, 1, 2), test_tag), \ |
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| 86 | (AABB(7, 8, 3, 4), 333), (AABB(1, 10, 0, 1), 444)]) |
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| 87 | |
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| 88 | result = cell.search([8.5, 1.5]) |
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| 89 | assert isinstance(result, (list, tuple)), 'should be a list' |
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| 90 | assert(len(result) == 1) |
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| 91 | data, _ = result[0] |
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| 92 | self.assertEqual(data, test_tag, 'only 1 point should intersect') |
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| 93 | |
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| 94 | def test_get_siblings(self): |
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| 95 | """ Make sure children know their parent. """ |
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| 96 | cell = Cell(AABB(0, 10, 0, 5), None) |
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| 97 | cell.insert([(AABB(1, 3, 1, 3), 111), (AABB(8, 9, 1, 2), 222)]) |
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| 98 | |
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| 99 | assert len(cell.children) == 2 |
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| 100 | assert cell.parent == None |
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| 101 | assert cell.children[0].parent == cell |
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| 102 | assert cell.children[1].parent == cell |
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| 103 | |
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| 104 | |
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| 105 | ################################################################################ |
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| 106 | |
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| 107 | if __name__ == "__main__": |
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| 108 | mysuite = unittest.makeSuite(Test_Geometry, 'test') |
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| 109 | runner = unittest.TextTestRunner() |
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| 110 | runner.run(mysuite) |
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