[luatex] \boxdir primitive

Vafa Khalighi persian-tex at tug.org
Fri Sep 13 09:07:31 CEST 2013


How \boxdir primitive work? if I give \boxdir TRT, I get error and luatex
expects the argument to be a number. I tried giving different numbers but
this time it complained that "that is a bad direction". However \boxdir
0TRT gives no error (actually you can replace 0 with any other number) but
that would not change the direction of any box.
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