Hi, Alan,

Thanks for the interesting read!

On Oct 23, 2014, at 3:49 PM, Alan W. Irwin wrote:

> So back to figuring out this ps device driver issue that apparently
> emits isolated "M" commands that come or go due to sensitive rounding
> issues that only occur in the 14th or later decimal digit of
> the floating-point quantity.

This is just a shot in the dark, but is it possible that this is supposed to be 
a closed path and one implementation gets the first/last points "close enough" 
so no closing segment needs to be drawn while the other implementation gets 
them not quite close enough so a closing segment is drawn?  This assumes that 
the "close enough" test happens at a higher precision than the drawing commands 
which rounds these "not quite close enough" points to exactly the same point.

Dave


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