The documentation of luatex says that \shapemode = 2 or 3 "mirrors"
a \parshape. But I see no effect. And also "Figure 2.1 The effect of
shapemode" in the documentation doesn't show any difference for the
parshapes. So how is it supposed to work? With hangindent the sides
are flipped as expected:
\input plipsum
\parindent=0pt
\parskip=1em
\hsize=10cm
\hangindent=1cm \hangafter=1 \lipsum{1}
\shapemode=3
\hangindent=1cm \hangafter=1 \lipsum{1}
\parshape 3 1cm \dimexpr\hsize-1cm\relax
1cm \dimexpr\hsize-1cm\relax
0cm \hsize
\lipsum{1}
\shapemode=3
\parshape 3 1cm \dimexpr\hsize-1cm\relax
1cm \dimexpr\hsize-1cm\relax
0cm \hsize
\lipsum{1}
\pardir TRT \textdir TRT
\parshape 3 1cm \dimexpr\hsize-1cm\relax
1cm \dimexpr\hsize-1cm\relax
0cm \hsize
\lipsum{1}
\shapemode=3
\pardir TRT \textdir TRT
\parshape 3 1cm \dimexpr\hsize-1cm\relax
1cm \dimexpr\hsize-1cm\relax
0cm \hsize
\lipsum{1}
\bye
--
Ulrike Fischer
http://www.troubleshooting-tex.de/
