| 1 | #!/usr/bin/env python |
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| 2 | |
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| 3 | |
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| 4 | import unittest |
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| 5 | from math import sqrt, pi |
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| 6 | |
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| 7 | |
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| 8 | from anuga.config import epsilon |
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| 9 | from Numeric import allclose, array, ones, Float |
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| 10 | from general_mesh import General_mesh |
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| 11 | from anuga.coordinate_transforms.geo_reference import Geo_reference |
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| 12 | |
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| 13 | |
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| 14 | |
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| 15 | class Test_General_Mesh(unittest.TestCase): |
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| 16 | def setUp(self): |
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| 17 | pass |
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| 18 | |
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| 19 | def tearDown(self): |
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| 20 | pass |
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| 21 | |
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| 22 | |
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| 23 | def test_get_vertex_coordinates(self): |
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| 24 | from mesh_factory import rectangular |
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| 25 | from Numeric import zeros, Float |
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| 26 | |
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| 27 | #Create basic mesh |
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| 28 | nodes, triangles, _ = rectangular(1, 3) |
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| 29 | domain = General_mesh(nodes, triangles) |
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| 30 | |
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| 31 | |
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| 32 | assert allclose(domain.get_nodes(), nodes) |
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| 33 | |
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| 34 | |
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| 35 | M = domain.number_of_triangles |
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| 36 | |
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| 37 | V = domain.get_vertex_coordinates() |
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| 38 | assert V.shape[0] == 3*M |
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| 39 | |
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| 40 | for i in range(M): |
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| 41 | for j in range(3): |
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| 42 | k = triangles[i,j] #Index of vertex j in triangle i |
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| 43 | assert allclose(V[3*i+j,:], nodes[k]) |
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| 44 | |
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| 45 | def test_get_vertex_coordinates_with_geo_ref(self): |
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| 46 | x0 = 314036.58727982 |
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| 47 | y0 = 6224951.2960092 |
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| 48 | geo = Geo_reference(56, x0, y0) |
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| 49 | |
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| 50 | a = [0.0, 0.0] |
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| 51 | b = [0.0, 2.0] |
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| 52 | c = [2.0, 0.0] |
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| 53 | d = [0.0, 4.0] |
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| 54 | e = [2.0, 2.0] |
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| 55 | f = [4.0, 0.0] |
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| 56 | |
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| 57 | nodes = array([a, b, c, d, e, f]) |
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| 58 | |
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| 59 | nodes_absolute = geo.get_absolute(nodes) |
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| 60 | |
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| 61 | #bac, bce, ecf, dbe, daf, dae |
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| 62 | triangles = array([[1,0,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 63 | |
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| 64 | domain = General_mesh(nodes, triangles, |
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| 65 | geo_reference = geo) |
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| 66 | verts = domain.get_vertex_coordinates(triangle_id=0) |
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| 67 | self.assert_(allclose(array([b,a,c]), verts)) |
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| 68 | verts = domain.get_vertex_coordinates(triangle_id=0) |
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| 69 | self.assert_(allclose(array([b,a,c]), verts)) |
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| 70 | verts = domain.get_vertex_coordinates(triangle_id=0, |
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| 71 | absolute=True) |
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| 72 | self.assert_(allclose(array([nodes_absolute[1], |
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| 73 | nodes_absolute[0], |
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| 74 | nodes_absolute[2]]), verts)) |
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| 75 | verts = domain.get_vertex_coordinates(triangle_id=0, |
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| 76 | absolute=True) |
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| 77 | self.assert_(allclose(array([nodes_absolute[1], |
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| 78 | nodes_absolute[0], |
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| 79 | nodes_absolute[2]]), verts)) |
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| 80 | |
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| 81 | |
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| 82 | |
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| 83 | def test_get_vertex_coordinates_triangle_id(self): |
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| 84 | """test_get_vertex_coordinates_triangle_id |
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| 85 | Test that vertices for one triangle can be returned. |
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| 86 | """ |
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| 87 | from mesh_factory import rectangular |
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| 88 | from Numeric import zeros, Float |
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| 89 | |
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| 90 | #Create basic mesh |
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| 91 | nodes, triangles, _ = rectangular(1, 3) |
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| 92 | domain = General_mesh(nodes, triangles) |
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| 93 | |
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| 94 | |
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| 95 | assert allclose(domain.get_nodes(), nodes) |
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| 96 | |
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| 97 | |
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| 98 | M = domain.number_of_triangles |
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| 99 | |
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| 100 | for i in range(M): |
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| 101 | V = domain.get_vertex_coordinates(triangle_id=i) |
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| 102 | assert V.shape[0] == 3 |
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| 103 | |
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| 104 | for j in range(3): |
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| 105 | k = triangles[i,j] #Index of vertex j in triangle i |
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| 106 | assert allclose(V[j,:], nodes[k]) |
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| 107 | |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | |
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| 112 | def test_get_vertex_values(self): |
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| 113 | """Get connectivity based on triangle lists. |
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| 114 | """ |
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| 115 | from mesh_factory import rectangular |
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| 116 | from Numeric import zeros, Float |
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| 117 | |
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| 118 | #Create basic mesh |
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| 119 | nodes, triangles, _ = rectangular(1, 3) |
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| 120 | domain = General_mesh(nodes, triangles) |
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| 121 | |
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| 122 | value = [7] |
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| 123 | assert allclose(domain.get_triangles(), triangles) |
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| 124 | assert allclose(domain.get_triangles([0,4]), |
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| 125 | [triangles[0], triangles[4]]) |
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| 126 | |
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| 127 | |
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| 128 | def test_vertex_value_indices(self): |
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| 129 | """Check that structures are correct. |
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| 130 | """ |
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| 131 | from mesh_factory import rectangular |
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| 132 | from Numeric import zeros, Float, array |
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| 133 | |
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| 134 | a = [0.0, 0.0] |
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| 135 | b = [0.0, 2.0] |
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| 136 | c = [2.0, 0.0] |
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| 137 | d = [0.0, 4.0] |
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| 138 | e = [2.0, 2.0] |
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| 139 | f = [4.0, 0.0] |
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| 140 | |
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| 141 | nodes = array([a, b, c, d, e, f]) |
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| 142 | #bac, bce, ecf, dbe, daf, dae |
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| 143 | triangles = array([[1,0,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 144 | |
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| 145 | domain1 = General_mesh(nodes, triangles) |
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| 146 | |
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| 147 | #Create larger mesh |
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| 148 | nodes, triangles, _ = rectangular(3, 6) |
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| 149 | domain2 = General_mesh(nodes, triangles) |
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| 150 | |
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| 151 | # Test both meshes |
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| 152 | for domain in [domain1, domain2]: |
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| 153 | assert sum(domain.number_of_triangles_per_node) ==\ |
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| 154 | len(domain.vertex_value_indices) |
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| 155 | |
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| 156 | # Check number of triangles per node |
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| 157 | count = [0]*domain.number_of_nodes |
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| 158 | for triangle in domain.triangles: |
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| 159 | for i in triangle: |
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| 160 | count[i] += 1 |
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| 161 | |
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| 162 | #print count |
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| 163 | # |
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| 164 | assert allclose(count, domain.number_of_triangles_per_node) |
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| 165 | |
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| 166 | # Check indices |
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| 167 | current_node = 0 |
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| 168 | k = 0 # Track triangles touching on node |
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| 169 | for index in domain.vertex_value_indices: |
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| 170 | k += 1 |
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| 171 | |
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| 172 | triangle = index / 3 |
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| 173 | vertex = index % 3 |
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| 174 | |
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| 175 | assert domain.triangles[triangle, vertex] == current_node |
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| 176 | |
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| 177 | if domain.number_of_triangles_per_node[current_node] == k: |
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| 178 | # Move on to next node |
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| 179 | k = 0 |
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| 180 | current_node += 1 |
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| 181 | |
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| 182 | |
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| 183 | def test_get_triangles_and_vertices_per_node(self): |
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| 184 | """test_get_triangles_and_vertices_per_node - |
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| 185 | |
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| 186 | Test that tuples of triangle, vertex can be extracted |
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| 187 | from inverted triangles structure |
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| 188 | |
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| 189 | """ |
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| 190 | |
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| 191 | a = [0.0, 0.0] |
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| 192 | b = [0.0, 2.0] |
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| 193 | c = [2.0, 0.0] |
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| 194 | d = [0.0, 4.0] |
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| 195 | e = [2.0, 2.0] |
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| 196 | f = [4.0, 0.0] |
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| 197 | |
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| 198 | nodes = array([a, b, c, d, e, f]) |
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| 199 | #bac, bce, ecf, dbe, daf, dae |
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| 200 | triangles = array([[1,0,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 201 | |
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| 202 | domain = General_mesh(nodes, triangles) |
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| 203 | |
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| 204 | # One node |
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| 205 | L = domain.get_triangles_and_vertices_per_node(node=2) |
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| 206 | assert allclose(L[0], [0, 2]) |
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| 207 | assert allclose(L[1], [1, 1]) |
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| 208 | assert allclose(L[2], [2, 1]) |
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| 209 | |
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| 210 | # All nodes |
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| 211 | ALL = domain.get_triangles_and_vertices_per_node() |
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| 212 | assert len(ALL) == 6 |
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| 213 | for i, Lref in enumerate(ALL): |
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| 214 | L = domain.get_triangles_and_vertices_per_node(node=i) |
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| 215 | assert allclose(L, Lref) |
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| 216 | |
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| 217 | |
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| 218 | |
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| 219 | |
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| 220 | |
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| 221 | |
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| 222 | |
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| 223 | def test_areas(self): |
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| 224 | from mesh_factory import rectangular |
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| 225 | from shallow_water import Domain |
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| 226 | from Numeric import zeros, Float |
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| 227 | |
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| 228 | #Create basic mesh |
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| 229 | points, vertices, boundary = rectangular(1, 3) |
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| 230 | domain = General_mesh(points, vertices) |
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| 231 | |
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| 232 | assert domain.get_area() == 1.0 |
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| 233 | |
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| 234 | |
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| 235 | def test_get_unique_vertex_values(self): |
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| 236 | """ |
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| 237 | get unique_vertex based on triangle lists. |
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| 238 | """ |
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| 239 | from mesh_factory import rectangular |
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| 240 | from shallow_water import Domain |
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| 241 | from Numeric import zeros, Float |
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| 242 | |
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| 243 | #Create basic mesh |
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| 244 | points, vertices, boundary = rectangular(1, 3) |
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| 245 | domain = General_mesh(points, vertices) |
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| 246 | |
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| 247 | assert domain.get_unique_vertices() == [0,1,2,3,4,5,6,7] |
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| 248 | unique_vertices = domain.get_unique_vertices([0,1,4]) |
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| 249 | unique_vertices.sort() |
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| 250 | assert unique_vertices == [0,1,2,4,5,6,7] |
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| 251 | |
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| 252 | unique_vertices = domain.get_unique_vertices([0,4]) |
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| 253 | unique_vertices.sort() |
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| 254 | assert unique_vertices == [0,2,4,5,6,7] |
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| 255 | |
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| 256 | def test_get_node(self): |
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| 257 | """test_get_triangles_and_vertices_per_node - |
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| 258 | |
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| 259 | Test that tuples of triangle, vertex can be extracted |
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| 260 | from inverted triangles structure |
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| 261 | |
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| 262 | """ |
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| 263 | |
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| 264 | x0 = 314036.58727982 |
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| 265 | y0 = 6224951.2960092 |
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| 266 | geo = Geo_reference(56, x0, y0) |
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| 267 | |
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| 268 | a = [0.0, 0.0] |
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| 269 | b = [0.0, 2.0] |
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| 270 | c = [2.0, 0.0] |
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| 271 | d = [0.0, 4.0] |
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| 272 | e = [2.0, 2.0] |
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| 273 | f = [4.0, 0.0] |
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| 274 | |
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| 275 | nodes = array([a, b, c, d, e, f]) |
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| 276 | |
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| 277 | nodes_absolute = geo.get_absolute(nodes) |
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| 278 | |
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| 279 | #bac, bce, ecf, dbe, daf, dae |
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| 280 | triangles = array([[1,0,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 281 | |
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| 282 | domain = General_mesh(nodes, triangles, |
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| 283 | geo_reference = geo) |
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| 284 | node = domain.get_node(2) |
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| 285 | self.assertEqual(c, node) |
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| 286 | |
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| 287 | node = domain.get_node(2, absolute=True) |
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| 288 | self.assertEqual(nodes_absolute[2], node) |
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| 289 | |
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| 290 | node = domain.get_node(2, absolute=True) |
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| 291 | self.assertEqual(nodes_absolute[2], node) |
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| 292 | |
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| 293 | |
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| 294 | def test_assert_index_in_nodes(self): |
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| 295 | """test_assert_index_in_nodes - |
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| 296 | |
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| 297 | Test that node indices in triangles are within nodes array. |
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| 298 | |
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| 299 | """ |
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| 300 | |
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| 301 | x0 = 314036.58727982 |
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| 302 | y0 = 6224951.2960092 |
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| 303 | geo = Geo_reference(56, x0, y0) |
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| 304 | |
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| 305 | a = [0.0, 0.0] |
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| 306 | b = [0.0, 2.0] |
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| 307 | c = [2.0, 0.0] |
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| 308 | d = [0.0, 4.0] |
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| 309 | e = [2.0, 2.0] |
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| 310 | f = [4.0, 0.0] |
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| 311 | |
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| 312 | nodes = array([a, b, c, d, e, f]) |
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| 313 | |
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| 314 | nodes_absolute = geo.get_absolute(nodes) |
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| 315 | |
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| 316 | # max index is 5, use 5, expect success |
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| 317 | triangles = array([[1,5,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 318 | General_mesh(nodes, triangles, geo_reference=geo) |
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| 319 | |
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| 320 | # max index is 5, use 6, expect assert failure |
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| 321 | triangles = array([[1,6,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 322 | self.failUnlessRaises(AssertionError, General_mesh, |
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| 323 | nodes, triangles, geo_reference=geo) |
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| 324 | |
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| 325 | # max index is 5, use 10, expect assert failure |
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| 326 | triangles = array([[1,10,2], [1,2,4], [4,2,5], [3,1,4]]) |
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| 327 | self.failUnlessRaises(AssertionError, General_mesh, |
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| 328 | nodes, triangles, geo_reference=geo) |
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| 329 | |
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| 330 | |
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| 331 | |
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| 332 | #------------------------------------------------------------- |
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| 333 | if __name__ == "__main__": |
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| 334 | suite = unittest.makeSuite(Test_General_Mesh,'test') |
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| 335 | #suite = unittest.makeSuite(Test_General_Mesh,'test_get_node') |
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| 336 | runner = unittest.TextTestRunner() |
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| 337 | runner.run(suite) |
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| 338 | |
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