On Sat, Feb 27, 2010 at 06:32:12PM +0000, Garth N. Wells wrote: > How do I pass the pointer to the first element of an array from the > Python interface to a wrapped C++ function? I would like to tabulate the > dofs of a cell, so I tried > > local_facet = cell.index(facet) > dofs = numpy.array(9, dtype=numpy.uint32) > dof_map.tabulate_facet_dofs(dofs, local_facet) > > but I get a bunch of memory errors. I don't know to correctly allocate > 'dofs' such that I can pass it to tabulate_facet_dofs.
Try this:
cell_dofs = numpy.zeros(n, dtype='I')
It has worked for me before. Also note that there are dolfin::Cell
functions for some (but not all) of the functions in DofMap which
allows access from Python without needing to create a ufc::cell.
--
Anders
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