On 01/06/10 17:07, Anders Logg wrote:
On Tue, Jun 01, 2010 at 03:19:50PM +0100, Garth N. Wells wrote:
On 01/06/10 15:10, Anders Logg wrote:
What is the difference from before? Is it only that the dofs are
always tabulated and stored (never computed on the fly)?
More or less. There are some bug fixes and some missing features
have been added (collapsed dof maps for renumbered maps, work in
parallel now).
It was too complicated (for me at least) to have both tabulated dofs
and on the fly computation via UFC in the same class. It's much
easier to follow now (which helped in finding some bugs).
Garth
Can you remind me of what collapse do? What is a contiguous dofmap?
A sub-dofmap will be, by default, a view into the original dof map.
It will extract the the relevant indices, but it won't change them.
It's suitable for when the sub-function shares the vector with the
original equation, e.g.
Function& u = U[0];
Function& p = U[1]; // U, u and p shared the same vector
A collapsed dof map is independent of the original dof map, with the
lowest index = 0 and the greatest = global_dimension -1. It's used
when a sub-function is extracted from a Function such that it has
it's own vector, e.g.
Function u = U[0]; // u has its own vector
Function p = U[1]; // p has its own vector
Garth
