strk, while I
commend your valiant efforts to reconcile the behaviour of inlined VS outlined
functions and their effect on GEOS robustness, I'm wondering whether this effort
can ever pay off.
As I understand the
problem, you're worried that inlined VS outlined code sometimes produces
incorrect results rather than throws exceptions, or perhaps even produces
correct results. It makes sense that this is due to subtle differences in
the way the FP computations are done. But even if you managed to get the
two implementations to behave identically, there would still be a whole set of
test cases which would still either get the wrong answer or throw an
exception. JTS has the same problem right now.
I think the best
place to direct effort is in solving the overall problem of robustness in the
fundamental algorithms. Hopefully this will be solid enough that it will
be immune to the inline/outline FP differences.
My impression is
that it would be a lot of incredibly finicky work to "solve" the inline/outline
difference, without improving robustness all that much. Or am I missing
something?
Martin Davis, Senior Technical
Architect
Vivid Solutions Inc. www.vividsolutions.com
Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5
Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046
Vivid Solutions Inc. www.vividsolutions.com
Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5
Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046
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