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%% This is part of OpTeX project, see http://petr.olsak.net/optex
\_codedecl \normalbaselineskip {Parameter settings <2020-01-23>}
% Settings like in plainTeX:
\_pretolerance=100
\_tolerance=200 % INITEX sets this to 10000
\_hbadness=1000
\_vbadness=1000
\_linepenalty=10
\_hyphenpenalty=50
\_exhyphenpenalty=50
\_binoppenalty=700
\_relpenalty=500
\_clubpenalty=150
\_widowpenalty=150
\_displaywidowpenalty=50
\_brokenpenalty=100
\_predisplaypenalty=10000
% \_postdisplaypenalty=0
% \_interlinepenalty=0
% \_floatingpenalty=0, set during \insert
% \_outputpenalty=0, set before TeX enters \output
\_doublehyphendemerits=10000
\_finalhyphendemerits=5000
\_adjdemerits=10000
% \_looseness=0, cleared by TeX after each paragraph
% \_pausing=0
% \_holdinginserts=0
% \_tracingonline=0
% \_tracingmacros=0
% \_tracingstats=0
% \_tracingparagraphs=0
% \_tracingpages=0
% \_tracingoutput=0
\_tracinglostchars=1
% \_tracingcommands=0
% \_tracingrestores=0
% \_language=0
\_uchyph=1
% \_lefthyphenmin=2 \_righthyphenmin=3 set below
% \_globaldefs=0
% \_maxdeadcycles=25 % INITEX does this
% \_hangafter=1 % INITEX does this, also TeX after each paragraph
% \_fam=0
% \_mag=1000 % INITEX does this
% \_escapechar=`\\ % INITEX does this
\_defaulthyphenchar=`\-
\_defaultskewchar=-1
% \_endlinechar=`\^^M % INITEX does this
%\_newlinechar=-1
\_delimiterfactor=901
% \_time=now % TeX does this at beginning of job
% \_day=now % TeX does this at beginning of job
% \_month=now % TeX does this at beginning of job
% \_year=now % TeX does this at beginning of job
\_showboxbreadth=5
\_showboxdepth=3
\_errorcontextlines=5
\_hfuzz=0.1pt
\_vfuzz=0.1pt
\_overfullrule=5pt
%\_hsize=6.5in
%\_vsize=8.9in
\_maxdepth=4pt
\_splitmaxdepth=\_maxdimen
\_boxmaxdepth=\_maxdimen
% \_lineskiplimit=0pt, changed by \_normalbaselines
\_delimitershortfall=5pt
\_nulldelimiterspace=1.2pt
\_scriptspace=0.5pt
% \_mathsurround=0pt
% \_predisplaysize=0pt, set before TeX enters $$
% \_displaywidth=0pt, set before TeX enters $$
% \_displayindent=0pt, set before TeX enters $$
\_parindent=20pt
% \_hangindent=0pt, zeroed by TeX after each paragraph
% \_hoffset=0pt
% \_voffset=0pt
% \_baselineskip=0pt, changed by \normalbaselines
% \_lineskip=0pt, changed by \normalbaselines
\_parskip=0pt plus 1pt
\_abovedisplayskip=12pt plus 3pt minus 9pt
\_abovedisplayshortskip=0pt plus 3pt
\_belowdisplayskip=12pt plus 3pt minus 9pt
\_belowdisplayshortskip=7pt plus 3pt minus 4pt
% \_leftskip=0pt
% \_rightskip=0pt
\_topskip=10pt
\_splittopskip=10pt
% \_tabskip=0pt
% \_spaceskip=0pt
% \_xspaceskip=0pt
\_parfillskip=0pt plus 1fil
\_thinmuskip=3mu
\_medmuskip=4mu plus 2mu minus 4mu
\_thickmuskip=5mu plus 5mu
% We also define special registers that function like parameters:
\_newskip\_smallskipamount \_smallskipamount=3pt plus 1pt minus 1pt
\_newskip\_medskipamount \_medskipamount=6pt plus 2pt minus 2pt
\_newskip\_bigskipamount \_bigskipamount=12pt plus 4pt minus 4pt
\_newskip\_normalbaselineskip \_normalbaselineskip=12pt
\_newskip\_normallineskip \_normallineskip=1pt
\_newdimen\_normallineskiplimit \_normallineskiplimit=0pt
\_newdimen\_jot \_jot=3pt
\_newcount\_interdisplaylinepenalty \_interdisplaylinepenalty=100
\_newcount\_interfootnotelinepenalty \_interfootnotelinepenalty=100
\_def\_normalbaselines{\_lineskip=\_normallineskip
\_baselineskip=\_normalbaselineskip \_lineskiplimit=\_normallineskiplimit}
\_def\_frenchspacing{\_sfcode`\.=1000 \sfcode`\?=1000 \sfcode`\!=1000
\sfcode`\:=1000 \sfcode`\;=1000 \sfcode`\,=1000 }
\_def\_nonfrenchspacing{\_sfcode`\.=3000 \sfcode`\?=3000 \sfcode`\!=3000
\sfcode`\:=2000 \sfcode`\;=1500 \sfcode`\,=1250 }
\_public
\normalbaselines \frenchspacing \nonfrenchspacing ;
\_normalbaselines % baseline setting,
% \nonfrenchspacing is not set -- we are living in Europe
% Different values than in plaiTeX:
\_outputmode=1 % PDF ouput
\_pdfvorigin=0pt
\_pdfhorigin=0pt
\_hoffset=20mm
\_voffset=20mm
\_hsize=170mm % 210mm (from A4 size) - 2*20mm (default margins)
\_vsize=257mm % 297mm (from A4 size) - 2*20mm (default margins)
\_pagewidth=210 true mm
\_pageheight=297 true mm
\_def\_plaintexsetting{%
\_pdfvorigin=1in
\_pdfhorigin=1in
\_hoffset=0pt
\_voffset=0pt
\_hsize=6.5in
\_vsize=8.9in
\_pagewidth=8.5 true in
\_pageheight=11 true in
}
\_public
\smallskipamount \medskipamount \bigskipamount
\normalbaselineskip \normallineskip \normallineskiplimit
\jot \interdisplaylinepenalty \interfootnotelinepenalty
\plaintexsetting ;
\_endcode %----------------------------------------------------
The parameters are set to the same values as in plain\TeX, but there is one
exception: The origin is at the top-left edge of the paper (this is more
practical than the origin in positioned in non-SI units). The default
typographical mirror is derived from A4 paper size and 20mm margins, not
from letter paper size and 1in margins. The reason is that we are living in
Europe where A4 paper is common in printers.
The macro `\plaintexsetting` removes the difference described above and sets
the typographical mirror as in old plain\TeX.
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