Vector Basis Function

[dokken]

As far as I can tell, you should use dolfinx.fem.Expression, which you give pre-determined points on the reference element. Then, in turn, you can evaluate this expression at the physical points in any cell by calling dolfinx.fem.Expression.eval(mesh, numpy_array_of_cell_indices)
as shown in:

Evaluate_basis_all in dolfinx

Please note that your specification of versions doesn’t make sense, as DOLFINx and FEniCSx represents the same package. Here is an updated example for v0.7.x from mpi4py import MPI import dolfinx import ufl import numpy as np domain = dolfinx.mesh.create_unit_square(MPI.COMM_WORLD, 1, 1) tdim = domain.topology.dim V = dolfinx.fem.FunctionSpace(domain, ("CG", 2)) point = np.array([[0.2, 0.3, 0]]) bb = dolfinx.geometry.bb_tree(domain, tdim) bbox_collisions = dolfinx.geometry.compute_collision…