def test_coordinates_y():
"""
/\ /\
| | |
| 2| 3|
/\ /\ /
| | | Hexagon size 1.
| 0| 1| Cells 2 x 2.
\/ \/
"""
size = 1
mesh = HexagonalMesh(size, 2, 1)
width = size * 2.0
# height refers to the y-distance between two hexagons
# centres in consecutive rows
height = sqrt(3) * size
# This is the total hexagon height that we use as the base
hex_height = 2.0 * width / sqrt(3)
mesh = HexagonalMesh(size, 2, 2)
assert allclose(mesh.coordinates, np.array((
(width / 2.0, hex_height / 2.0, 0),
(width * 3.0 / 2.0, hex_height / 2.0, 0),
(width, height + hex_height / 2.0, 0),
(width * 2, height + hex_height / 2.0, 0))))
def test_neighbours_multiple():
"""
/\ /\ /\
| | | |
| 6| 7| 8|
/\ /\ /\ /
| | | |
| 3| 4| 5|
/\ /\ /\ /
| | | | Hexagon size 1.
| 0| 1| 2| Cells 3 x 3.
\/ \/ \/
"""
mesh = HexagonalMesh(1, 3, 3)
print mesh.neighbours
# assert to_sets(mesh.neighbours) == [{1, 3}, {0, 2, 3, 4}, # cells 0, 1
# {1, 4, 5}, {0, 1, 4, 6}, # cells 2, 3
# {1, 2, 3, 5, 6, 7}, {2, 4, 7, 8}, # cells 4, 5
# {3, 4, 7}, {4, 5, 6, 8}, # cells 6, 7
# {5, 7}] # cell 8
assert (mesh.neighbours == [[1, -1, 3, -1, -1, -1], # cell 0
[2, 0, 4, -1, 3, -1], # cell 1
[-1, 1, 5, -1, 4, -1], # cell 2
[4, -1, 6, 0, -1, 1], # cell 3
[5, 3, 7, 1, 6, 2], # cell 4
[-1, 4, 8, 2, 7, -1], # cell 5
[7, -1, -1, 3, -1, 4], # ...
[8, 6, -1, 4, -1, 5],
[-1, 7, -1, 5, -1, -1]
]
).all()
def test_neighbours_multiple_square():
"""
/\ /\ /\
| | | |
| 6| 7| 8|
/\ /\ /\ /
| | | |
| 3| 4| 5|
\ /\ /\ /\
| | | |
| 0| 1| 2| Hexagon size 1.
\/ \/ \/ Cells 3 x 3.
"""
mesh = HexagonalMesh(1, 3, 3, alignment='square')
print mesh.neighbours
assert (mesh.neighbours == [[1, -1, 4, -1, 3, -1], # cell 0
[2, 0, 5, -1, 4, -1], # cell 1
[-1, 1, -1, -1, 5, -1], # cell 2
[4, -1, 6, -1, -1, 0], # ...
[5, 3, 7, 0, 6, 1],
[-1, 4, 8, 1, 7, 2],
[7, -1, -1, 3, -1, 4],
[8, 6, -1, 4, -1, 5],
[-1, 7, -1, 5, -1, -1]
]
).all()
def test_neighbours_x_periodic():
"""
/\ /\
| | | Hexagon size 1.
| 0| 1| Cells 2 x 1.
\/ \/
"""
mesh = HexagonalMesh(1, 2, 1, periodicity=(True, False))
assert (mesh.neighbours == [[1, 1, -1, -1, -1, -1],
[0, 0, -1, -1, -1, -1]]).all()
def test_neighbours_x():
"""
/\ /\
| | | Hexagon size 1.
| 0| 1| Cells 2 x 1.
\/ \/
"""
mesh = HexagonalMesh(1, 2, 1)
# assert to_sets(mesh.neighbours) == [{1}, {0}]
assert (mesh.neighbours == [[1, -1, -1, -1, -1, -1],
[-1, 0, -1, -1, -1, -1]]).all()
def test_coordinates_y():
"""
/\ /\
| | |
| 2| 3|
/\ /\ /
| | | Hexagon size 1.
| 0| 1| Cells 2 x 2.
\/ \/
"""
size = 1
mesh = HexagonalMesh(size, 2, 1)
width = size * 2.0
height = sqrt(3) / 2.0 * width
mesh = HexagonalMesh(size, 2, 2)
assert allclose(
mesh.coordinates,
np.array(((width / 2.0, height / 2.0, 0), (width * 3.0 / 2.0,
height / 2.0, 0),
(width, height * 5.0 / 4.0, 0), (width * 2,
height * 5.0 / 4.0, 0))))
def test_neighbours_y_periodic():
"""
/\
| |
| 1|
/\ /
| | Hexagon size 1.
| 0| Cells 1 x 2.
\/
"""
mesh = HexagonalMesh(1, 1, 2, periodicity=(False, True))
assert (mesh.neighbours == [[-1, -1, 1, 1, -1, -1],
[-1, -1, 0, 0, -1, -1]]).all()
def test_neighbours_y_square():
"""
/\
| |
| 1|
\/\
| | Hexagon size 1.
| 0| Cells 1 x 2.
\/
"""
mesh = HexagonalMesh(1, 1, 2, alignment='square')
assert (mesh.neighbours == [[-1, -1, -1, -1, 1, -1],
[-1, -1, -1, -1, -1, 0]]).all()
def test_neighbours_y():
"""
/\
| |
| 1|
/\ /
| | Hexagon size 1.
| 0| Cells 1 x 2.
\/
"""
mesh = HexagonalMesh(1, 1, 2)
# assert to_sets(mesh.neighbours) == [{1}, {0}]
assert (mesh.neighbours == [[-1, -1, 1, -1, -1, -1],
[-1, -1, -1, 0, -1, -1]]).all()
def test_coordinates_x():
"""
/\ /\
| | | Hexagon size 1.
| | | Cells 2 x 1.
\/ \/
"""
size = 1
mesh = HexagonalMesh(size, 2, 1)
width = size * 2.0
height = 2.0 * width / sqrt(3)
assert allclose(mesh.coordinates,
np.array(((width / 2.0, height / 2.0, 0),
(width * 3.0 / 2.0, height / 2.0, 0))))
def test_iterate_over_cells_and_neighbours():
mesh = HexagonalMesh(1, 2, 2)
for c_i in mesh.cells():
print "I am cell #{}.".format(c_i)
for c_j in mesh.neighbours[c_i]:
print "\tAnd I am its neighbour, cell #{}!".format(c_j)
def test_iterate_over_cells():
mesh = HexagonalMesh(1, 2, 2)
for c_i in mesh.cells():
print "This is cell #{}, I have neighbours {}.".format(c_i, mesh.neighbours[c_i])
def test_iterate_over_cells_and_neighbours():
mesh = HexagonalMesh(1, 2, 2)
for c_i in mesh.cells():
print "I am cell #{}.".format(c_i)
for c_j in mesh.neighbours[c_i]:
print "\tAnd I am its neighbour, cell #{}!".format(c_j)
def test_iterate_over_cells():
mesh = HexagonalMesh(1, 2, 2)
for c_i in mesh.cells():
print "This is cell #{}, I have neighbours {}.".format(c_i, mesh.neighbours[c_i])
