[metapost] Re: pdf output and extensions
bop at bop.com.pl
Wed Mar 16 10:03:20 CET 2005
> Alternatives are "leftoffsetpath" and "rightoffsetpath",
> terms I have spotted in the literature.
For me, it's OK.
> As for "well-defined", there is a quandry at cusps on the
> path (as at the top of handwritten dotless i).
> So the "well-definition" difficulties here are artifacts of
> the path technology.
But you agree, that a human being is able to find a continuous one-hand
envelope, at least in most of practical cases. If so, there must have been
an algorithmic approach...
I hope that the bitmap machinery working behind the scene, (implanting
METAFONT bitmap machinery, i.e., so called ``edge structure'', into MP is
currently under consideration) can be helpful in such cases; namely, it can
help to determine (within a given accuracy) whether the interior lies to the
left or to the right of the path being traversed. If we assume that the
interior should be kept always at the same side during the traversing of
a path, the ambiguity of the turning direction at cusps can be overcome.
BOP s. c.
ul. Bora-Komorowskiego 24, 80-377 Gdansk, Poland
tel. (+48 58) 553 46 59, fax (+48 58) 511 03 81
bop at bop.com.pl, http://www.bop.com.pl
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