Re: [NTG-context] underbraces get progressively more misaligned (w/ minimal example)

4 Jul 2014


      On 7/4/2014 6:58 AM, Wolfgang Schuster wrote:
...
Am 04.07.2014 um 00:51 schrieb Hans Hagen mailto:pragma@wxs.nl>:
...
On 7/4/2014 12:37 AM, Sanjoy Mahajan wrote:
...
...
context --make does a --generate so you can skip that and the luatools
run is not needed either (selfupdate is seldom needed too)
So 'context --make' is all one needs?  I'll update the wiki.
...
we get a ..5pt height difference somewhere (nothing else different in a
trace) .... smells like a luatex bug (testing that now)
That is my suspicion as well.  But I couldn't reproduce it with plain
luatex.  Though maybe I needed to use equation numbers, however that is
done in plain tex (the context run doesn't show the problem without the
\placeformula).
I suspect some internal state is getting slightly corrupted and getting
progressively worse with the 30,000 repetitions.
here it happens after a pagebreak (a few lines overflow are ok)
It does also depend on the width of the text because when I use 48pt in
the example below
the height of the brace is always the same but with 49pt the height
increases after the first page.
\starttext
\dorecurse{100}
   {\startformula
    \mathord
{%\setbox\scratchbox\mathstylehbox{\Umathaccent\fam\zerocount"FE3DF{\hskip48pt}}%
\setbox\scratchbox\mathstylehbox{\Umathaccent\fam\zerocount"FE3DF{\hskip49pt}}%
       \the\userpageno:\the\ht\scratchbox}%
    \stopformula}
\stoptext
\starttext

\dorecurse{1000}
   {\setbox\scratchbox\hbox{$\Umathaccent\fam\zerocount"FE3DF{\hskip49pt}$}%
    \the\ht\scratchbox\par}

\stoptext

that was the one i used when seeing some trigger from the page break 
(the two at the top of page 2 are the overshoot before tex triggers the 
page)

Hans

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