kerning in slanted/unslanted founts

[Chris Rowley]

Alan Jeffrey wrote --
> I'm not sure why the kern values should change when you slant a font,
> since horizontal displacement is invariant under slant transforms.

But, as Lars said more quantitatively, kern values do not depend only
on what happens horizontally.  The visual nearness of two shapes
depends on "non-horizontal relationships" between black pixels, and
these are not preserved by skew transformations.


chris