🚀 go-pugleaf

Talked to our font guru, Terry O'Donnell...

leslie@book.dle.dg.com (Leslie French) asked:

>   Does the direction of a hint make a difference, i.e. is there any
>   difference between (say)
>
>           150 -10 hstem    and    140 10 hstem

The simple answer is that it doesn't matter which way the stem
zone values are declared - either of these methods will give the
same result.

In the case of horizontal stems, for example - the order does
not determine which side of the stem is "anchored". The critical
case is where these hint zones lie in alignment zones declared in
the BlueValues array - such as those for the cap height, x-height, 
etc. In this case, alignment is controlled by a combination of where
the character extremity falls in the alignment zone - and the
values of other hint operators which control overshoots - namely
BlueScale and BlueShift.

Carl 8-)