[metapost] turning number revisited

[Boguslaw Jackowski]

Jacko:
> This shows that Knuth handles weird cases consistently.

So, why the MF algorithm was not compatibly transferred
(by John D. Hobby, I guess) to MP? Does anybody know?
What's so difficult in transferring MF turningnumber
procedure to MP? (I don't suggest that it must be easy,
just curious; as I mentioned, I've never understood
the sources in detail.)

Cheers -- Jacko

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  Bogus\l{}aw Jackowski: B_Jackowski at GUST.ORG.PL
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