On Fri, 14 Oct 2022 at 14:58, Taco Hoekwater via ntg-context < ntg-context@ntg.nl> wrote:
> > > > On 14 Oct 2022, at 14:26, Alan Braslau via ntg-context < > ntg-context@ntg.nl> wrote: > > > > Are you using MP in scaled integer or in doubleprecision mode? > > > > I have not looked into the MP angle operator code, but my suspicion is > that it is based on some super-clever John Hobby scheme optimized for > scaled integer calculations. > > The scaled version of “angle” is a handwritten approximation in web, not > using > any math library. I really doubt that that code is faster than calling > atan2() > on a modern machine, but I’ve kept it in because using a lib might give > slightly > different results. > iirc, in metapost the whole scaled number system has no dependency from any external math library (I have not checked the lmtx source yet).
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