On Thu, 2002-05-30 at 09:28, Gregory D Abram wrote:
> 
> Hard, I'm afraid.  Each module does its own thing on each element type -
> eg. MapToPlane has code to MTP each element type, Isosurface has code to
> isosurface each element type etc, etc, etc.  Often, there are several
> methods, depending on whether the positions component is regular,
> partitially regular, or fully irregular.  I'm curious - where do problems
> arise with degenerate cubes?  I'll grant the 1/3 overhead for the
> connections component and neighbors.  Anything else?

At this point I don't know what's going wrong, and need to do further
testing.  It appears to work for tiny meshes (thousands of cells), but
for larger meshes (100 of thousands of cells) it zips through the import
and other modules, but then bogs down in the image module for ~15min
before the image window finally displays.  This is on a 1.6GHz athlon
with 1GB memory.  My *wild* speculation is that there is some n^2
(n^3,...) loop related to coping with degenerate elements.  But I've
got more testing to do...

-- 
Neil N. Carlson                    Motorola, Los Alamos Research Park
Motorola Labs / PSRL               4200 W. Jemez Road, Suite 300
Computational Nanoscience Group    Los Alamos, New Mexico 87544

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