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from mpi4py import MPI
import pytest
import dolfinx
from dolfinx.mesh import CellType, Mesh, create_unit_cube, create_unit_square
@pytest.mark.parametrize("ctype", [CellType.hexahedron, CellType.tetrahedron, CellType.prism])
def test_uniform_refinement_3d(ctype):
mesh = create_unit_cube(MPI.COMM_WORLD, 3, 2, 1, cell_type=ctype)
ncells0 = mesh.topology.index_map(3).size_local
mesh.topology.create_entities(1)
mesh.topology.create_entities(2)
m2 = dolfinx.mesh.uniform_refine(mesh)
ncells1 = m2.topology.index_map(3).size_local
assert mesh.comm.allreduce(ncells0) * 8 == mesh.comm.allreduce(ncells1)
@pytest.mark.parametrize("ctype", [CellType.triangle, CellType.quadrilateral])
def test_uniform_refinement_2d(ctype):
mesh = create_unit_square(MPI.COMM_WORLD, 12, 11, cell_type=ctype)
ncells0 = mesh.topology.index_map(2).size_local
mesh.topology.create_entities(1)
m2 = dolfinx.mesh.uniform_refine(mesh)
ncells1 = m2.topology.index_map(2).size_local
assert mesh.comm.allreduce(ncells0) * 4 == mesh.comm.allreduce(ncells1)
def test_uniform_refine_mixed_mesh(mixed_topology_mesh):
mesh = Mesh(mixed_topology_mesh, None)
ct = mesh.topology.entity_types[3]
ncells0 = {ct[j]: mesh.topology.index_maps(3)[j].size_local for j in range(4)}
print(ncells0)
mesh.topology.create_entities(1)
mesh.topology.create_entities(2)
m2 = Mesh(dolfinx.cpp.refinement.uniform_refine(mesh._cpp_object, None), None)
ncells1 = {ct[j]: m2.topology.index_maps(3)[j].size_local for j in range(4)}
comm = mesh.comm
assert comm.allreduce(ncells0[CellType.hexahedron]) * 8 == comm.allreduce(
ncells1[CellType.hexahedron]
)
assert comm.allreduce(ncells0[CellType.prism]) * 8 == comm.allreduce(ncells1[CellType.prism])
assert comm.allreduce(ncells0[CellType.pyramid]) * 5 == comm.allreduce(
ncells1[CellType.pyramid]
)
assert comm.allreduce(ncells0[CellType.tetrahedron]) * 8 + comm.allreduce(
ncells0[CellType.pyramid]
) * 4 == comm.allreduce(ncells1[CellType.tetrahedron])
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