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import numpy as np
import meshplex
def test_mesh_line():
pts = [0.0, 1.0, 3.0, 4.0]
cells = [[0, 1], [1, 2], [2, 3]]
mesh = meshplex.Mesh(pts, cells)
print(mesh.cell_volumes)
ref = [1.0, 2.0, 1.0]
assert np.all(np.abs(mesh.cell_volumes - ref) < np.abs(ref) * 1.0e-13)
def test_vol_tri():
# two triangles in 5D
points = [
[0.0, 0.0, 0.0, 0.0, 0.0],
[1.0, 0.0, 0.0, 0.0, 0.0],
[1.0, 1.0, 0.0, 0.0, 0.0],
[0.0, 1.0, 0.0, 0.0, 0.0],
]
cells = [[0, 1, 2], [0, 3, 2]]
mesh = meshplex.Mesh(points, cells)
ref = [0.5, 0.5]
print(mesh.cell_volumes)
assert np.all(np.abs(mesh.cell_volumes - ref) < np.abs(ref) * 1.0e-13)
def test_vol_tetra():
points = [
[0.0, 0.0, 0.0],
[1.0, 0.0, 0.0],
[0.0, 1.0, 0.0],
[0.0, 0.0, 1.0],
]
cells = [[0, 1, 2, 3]]
mesh = meshplex.Mesh(points, cells)
ref = [1 / 6]
print(mesh.cell_volumes)
assert np.all(np.abs(mesh.cell_volumes - ref) < np.abs(ref) * 1.0e-13)
def test_vol_simplex5():
points = [
[0.0, 0.0, 0.0, 0.0],
[1.0, 0.0, 0.0, 0.0],
[0.0, 1.0, 0.0, 0.0],
[0.0, 0.0, 1.0, 0.0],
[0.0, 0.0, 0.0, 1.0],
]
cells = [[0, 1, 2, 3, 4]]
mesh = meshplex.Mesh(points, cells)
ref = [1 / 24]
print(mesh.cell_volumes)
assert np.all(np.abs(mesh.cell_volumes - ref) < np.abs(ref) * 1.0e-13)
if __name__ == "__main__":
# test_vol_tri()
test_vol_tetra()
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