def get_triangle_1():
"""Returns about the simplest triangle grid possible."""
nodes = [(0, 0), (2, 0), (1, 2), (3, 2)]
faces = [(0, 1, 2), (1, 3, 2)]
edges = [(0, 1), (1, 3), (3, 2), (2, 0)]
return ugrid.ugrid(nodes, faces, edges)
def get_triangle_1():
"""Returns about the simplest triangle grid possible."""
nodes = [(0, 0),
(2, 0),
(1, 2),
(3, 2)]
faces = [(0, 1, 2),
(1, 3, 2)]
edges = [(0, 1),
(1, 3),
(3, 2),
(2, 0)]
return ugrid.ugrid(nodes, faces, edges)
def get_triangle_2():
"""
Returns set up a basic triangle grid with a hole and a "tail"."""
nodes = [
(5, 1),
(10, 1),
(3, 3),
(7, 3),
(9, 4),
(12, 4),
(5, 5),
(3, 7),
(5, 7),
(7, 7),
(9, 7),
(11, 7),
(5, 9),
(8, 9),
(11, 9),
(9, 11),
(11, 11),
(7, 13),
(9, 13),
(7, 15),
]
faces = [(0, 1, 3), (0, 2, 6), (0, 3, 6), (1, 3, 4), (1, 4, 5), (2, 6, 7),
(6, 7, 8), (7, 8, 12), (6, 8, 9), (8, 9, 12), (9, 12, 13),
(4, 5, 11), (4, 10, 11), (9, 10, 13), (10, 11, 14), (10, 13, 14),
(13, 14, 15), (14, 15, 16), (15, 16, 18), (15, 17, 18),
(17, 18, 19)]
edges = [(0, 1), (1, 5), (5, 11), (11, 14), (14, 16), (16, 18), (18, 19),
(19, 17), (17, 15), (15, 13), (13, 12), (12, 7), (7, 2), (2, 0),
(3, 4), (4, 10), (10, 9), (9, 6), (6, 3)]
return ugrid.ugrid(nodes, faces, edges)
def get_triangle_2():
"""
rerturns set up a basic triangle grid with a hole and a "tail"
"""
nodes = [(5,1),
(10,1),
(3,3),
(7,3),
(9,4),
(12,4),
(5,5),
(3,7),
(5,7),
(7,7),
(9,7),
(11,7),
(5,9),
(8,9),
(11,9),
(9,11),
(11,11),
(7,13),
(9,13),
(7,15),
]
faces = [(0,1,3),
(0,2,6),
(0,3,6),
(1,3,4),
(1,4,5),
(2,6,7),
(6,7,8),
(7,8,12),
(6,8,9),
(8,9,12),
(9,12,13),
(4,5,11),
(4,10,11),
(9,10,13),
(10,11,14),
(10,13,14),
(13,14,15),
(14,15,16),
(15,16,18),
(15,17,18),
(17,18,19),
]
edges = [(0,1),
(1,5),
(5,11),
(11,14),
(14,16),
(16,18),
(18,19),
(19,17),
(17,15),
(15,13),
(13,12),
(12,7),
(7,2),
(2,0),
(3,4),
(4,10),
(10,9),
(9,6),
(6,3),
]
return ugrid.ugrid(nodes, faces, edges)
