Subject: [ggl] Re: Problems with the difference between two polygons
From: Angus Johnson (awj1958)
Date: 2011-08-07 15:34:28
On 7/08/2011 10:29 AM, Simonson, Lucanus J wrote:
> I'm not sure that one choice of rounding can be called more correct
> than another.
Hi Luke. I hope I didn't call my library "more correct" than the others,
as that is evidently not the case. However, I was stating that Clipper
was returning a simpler (while still correct) solution.
> Ggl is most accurate because it uses only machine rounding.
ISTM Ggl doesn't round, but otherwise - yes, fractions *may be* more
accurate, though Is Ggl still vulnerable to floating point imprecision
(see
http://barendgehrels.blogspot.com/2011/01/precision-cause-of-spikes.html )?
A.