[ATM] PLOP number of mesh rings (Mark Holm)

[Mark Holm]

Another possibility is that the design is not terribly critical, so that 
relatively inconsequential differences in the model result in fairly 
large changes in the resulting layout.  How much RMS deformation 
difference is there between these different results?  If there isn't 
much change in deformation, it may not matter much which design is 
chosen, and the optimizer may drive to rather different geometries based 
on modeling differences.

What happens if you take the geometry optimized with x mesh rings, fix 
it, and calculate the deformation using y mesh rings?  Don't let Plop 
optimize for y rings, just recalculate the deformation.  Does the 
recalculation indicate a significant change in deformation, more than a 
couple of nm?

I suggest Fabio should contact David Lewis with these questions.  I 
don't know if David is in a position to answer at this time, but he 
certainly has more in depth knowledge of Plop's operation than most of us.

Fabio Falchi wrote:
> The problem is that from 20 mesh rings to 70 the trangle varies more 
> than 2 cm!
> I don't know if it will converge to a stable triangle, using, say, 
> 100, 200 rings, due to the too long computation time.
> It seems that the result of optimization made at 20 mesh is different 
> from that made at 21 and so on.
>
> Fabio
>
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-- 
Mark Holm
markholm at verizon.net
holmmarkd at gmail.com