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from __future__ import annotations
import pathlib
import platform
from requests.exceptions import HTTPError
import meshio
import numpy as np
import pytest
import pyvista as pv
from pyvista import examples
# test for i386/i486/i586/i686, which fails HTTP requests
http_xfail = platform.machine()[0]+platform.machine()[2:] == 'i86'
try:
cow = examples.download_cow().cast_to_unstructured_grid()
beam = pv.UnstructuredGrid(examples.hexbeamfile)
airplane = examples.load_airplane().cast_to_unstructured_grid()
uniform = examples.load_uniform().cast_to_unstructured_grid()
mesh2d = meshio.Mesh(
points=[[0.0, 0.0], [1.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
cells=[("triangle", [[0, 1, 2], [1, 3, 2]])],
)
except HTTPError:
# expect HTTP requests from i386 to get refused
# but reraise the exception on other systems
if not http_xfail:
raise
cow = beam = airplane = uniform = mesh2d = None
polyhedron = meshio.Mesh(
points=[
[0.3568221, -0.49112344, 0.79465446],
[-0.3568221, -0.49112344, 0.79465446],
[0.3568221, 0.49112344, -0.79465446],
[-0.3568221, 0.49112344, -0.79465446],
[0.0, 0.98224693, 0.18759243],
[0.0, 0.60706198, 0.79465446],
[0.0, -0.60706198, -0.79465446],
[0.0, -0.98224693, -0.18759243],
[0.93417233, 0.30353101, 0.18759247],
[0.93417233, -0.30353101, -0.18759247],
[-0.93417233, 0.30353101, 0.18759247],
[-0.93417233, -0.30353101, -0.18759247],
[-0.57735026, 0.18759249, 0.79465446],
[0.57735026, -0.79465446, 0.18759249],
[-0.57735026, -0.18759249, -0.79465446],
[0.57735026, 0.79465446, -0.18759249],
[0.57735026, 0.18759249, 0.79465446],
[-0.57735026, 0.79465446, -0.18759249],
[-0.57735026, -0.79465446, 0.18759249],
[0.57735026, -0.18759249, -0.79465446],
[0.3568221, 0.49112344, -1.0],
[0.57735026, -0.18759249, -1.0],
[0.0, -0.60706198, -1.0],
[-0.57735026, -0.18759249, -1.0],
[-0.3568221, 0.49112344, -1.0],
[0.3568221, -0.49112344, 1.0],
[0.57735026, 0.18759249, 1.0],
[0.0, 0.60706198, 1.0],
[-0.57735026, 0.18759249, 1.0],
[-0.3568221, -0.49112344, 1.0],
],
cells=[
(
"polyhedron20",
[
[
[0, 16, 5, 12, 1],
[1, 18, 7, 13, 0],
[2, 19, 6, 14, 3],
[3, 17, 4, 15, 2],
[4, 5, 16, 8, 15],
[5, 4, 17, 10, 12],
[6, 7, 18, 11, 14],
[7, 6, 19, 9, 13],
[8, 16, 0, 13, 9],
[9, 19, 2, 15, 8],
[10, 17, 3, 14, 11],
[11, 18, 1, 12, 10],
],
],
),
(
"polyhedron10",
[
[
[2, 19, 6, 14, 3],
[20, 21, 19, 2],
[21, 22, 6, 19],
[22, 23, 14, 6],
[23, 24, 3, 14],
[24, 20, 2, 3],
[20, 21, 22, 23, 24],
],
[
[0, 16, 5, 12, 1],
[0, 16, 26, 25],
[16, 5, 27, 26],
[5, 12, 28, 27],
[12, 1, 29, 28],
[1, 0, 25, 29],
[25, 26, 27, 28, 29],
],
],
),
],
)
@pytest.mark.parametrize("mesh_in", [beam, airplane, uniform, mesh2d, polyhedron, cow])
@pytest.mark.xfail(http_xfail, reason=f"test HTTP requests are refused on {platform.machine()}")
def test_meshio(mesh_in, tmpdir):
if isinstance(mesh_in, meshio.Mesh):
mesh_in = pv.from_meshio(mesh_in)
# Save and read reference mesh using meshio
filename = tmpdir.mkdir("tmpdir").join("test_mesh.vtu")
pv.save_meshio(filename, mesh_in)
mesh = pv.read_meshio(filename)
# Assert mesh is still the same
assert np.allclose(mesh_in.points, mesh.points)
if (mesh_in.celltypes == 11).all():
cells = mesh_in.cells.reshape((mesh_in.n_cells, 9))[:, [0, 1, 2, 4, 3, 5, 6, 8, 7]].ravel()
assert np.allclose(cells, mesh.cells)
else:
assert np.allclose(mesh_in.cells, mesh.cells)
for k, v in mesh_in.point_data.items():
assert np.allclose(v, mesh.point_data[k.replace(" ", "_")])
for k, v in mesh_in.cell_data.items():
assert np.allclose(v, mesh.cell_data[k.replace(" ", "_")])
def test_pathlib_read_write(tmpdir, sphere):
path = pathlib.Path(str(tmpdir.mkdir("tmpdir").join('tmp.vtk')))
pv.save_meshio(path, sphere)
assert path.is_file()
mesh = pv.read_meshio(path)
assert isinstance(mesh, pv.UnstructuredGrid)
assert mesh.points.shape == sphere.points.shape
def test_file_format():
from meshio._exceptions import ReadError
from meshio._exceptions import WriteError
with pytest.raises(ReadError):
_ = pv.read_meshio(examples.hexbeamfile, file_format="bar")
if beam:
with pytest.raises((KeyError, WriteError)):
pv.save_meshio("foo.bar", beam, file_format="bar")
with pytest.raises((KeyError, WriteError)):
pv.save_meshio("foo.npy", beam, file_format="npy")
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