def test_pointsource_vector_fs(mesh, point):
"""Tests point source when given constructor PointSource(V, point,
mag) with a vector for a vector function space that isn't placed
at a node for 1D, 2D and 3D. Global points given to constructor
from rank 0 processor.
"""
rank = MPI.rank(mesh.mpi_comm())
V = VectorFunctionSpace(mesh, "CG", 1)
v = TestFunction(V)
b = assemble(dot(Constant([0.0] * mesh.geometry().dim()), v) * dx)
if rank == 0:
ps = PointSource(V, point, 10.0)
else:
ps = PointSource(V, [])
ps.apply(b)
# Checks array sums to correct value
b_sum = b.sum()
assert round(b_sum - 10.0 * V.num_sub_spaces()) == 0
# Checks point source is added to correct part of the array
v2d = vertex_to_dof_map(V)
for v in vertices(mesh):
if near(v.midpoint().distance(point), 0.0):
for spc_idx in range(V.num_sub_spaces()):
ind = v2d[v.index() * V.num_sub_spaces() + spc_idx]
if ind < len(b.get_local()):
assert np.round(b.get_local()[ind] - 10.0) == 0
def test_pointsource_vector_fs(mesh, point):
"""Tests point source when given constructor PointSource(V, point,
mag) with a vector for a vector function space that isn't placed
at a node for 1D, 2D and 3D. Global points given to constructor
from rank 0 processor.
"""
rank = MPI.rank(mesh.mpi_comm())
V = VectorFunctionSpace(mesh, "CG", 1)
v = TestFunction(V)
b = assemble(dot(Constant([0.0]*mesh.geometry().dim()), v)*dx)
if rank == 0:
ps = PointSource(V, point, 10.0)
else:
ps = PointSource(V, [])
ps.apply(b)
# Checks array sums to correct value
b_sum = b.sum()
assert round(b_sum - 10.0*V.num_sub_spaces()) == 0
# Checks point source is added to correct part of the array
v2d = vertex_to_dof_map(V)
for v in vertices(mesh):
if near(v.midpoint().distance(point), 0.0):
for spc_idx in range(V.num_sub_spaces()):
ind = v2d[v.index()*V.num_sub_spaces() + spc_idx]
if ind < len(b.get_local()):
assert np.round(b.get_local()[ind] - 10.0) == 0
