summaryrefslogtreecommitdiff
path: root/doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex
diff options
context:
space:
mode:
Diffstat (limited to 'doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex')
-rw-r--r--doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex124
1 files changed, 124 insertions, 0 deletions
diff --git a/doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex b/doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex
new file mode 100644
index 000000000..079131565
--- /dev/null
+++ b/doc/context/sources/general/manuals/luametafun/luametafun-followtext.tex
@@ -0,0 +1,124 @@
+% language=us
+
+\environment luametafun-style
+
+\startcomponent luametafun-followtext
+
+\startchapter[title={Followtext}]
+
+Typesetting text along a path started as a demo if communication between \TEX\ and
+\METAPOST\ in the early days of \METAFUN. In the meantime the implementation has
+been modernized a few times and the current implementation feels okay, especially
+now that we have a better user interface. Here is an example:
+
+\startbuffer[1a]
+\startMPcode{doublefun}
+ draw lmt_followtext [
+ text = "How well does it work {\bf 1}! ",
+ path = fullcircle scaled 4cm,
+ trace = true,
+ spread = true,
+ ] ysized 5cm ;
+\stopMPcode
+\stopbuffer
+
+\typebuffer[1a][option=TEX]
+
+Here is the same example but with the text in the reverse order. The results of both examples
+are shown in \in {figure} [followtext:1].
+
+\startbuffer[1b]
+\startMPcode{doublefun}
+ draw lmt_followtext [
+ text = "How well does it work {\bf 2}! ",
+ path = fullcircle scaled 4cm,
+ trace = true,
+ spread = false,
+ reverse = true,
+ ] ysized 5cm ;
+\stopMPcode
+\stopbuffer
+
+\typebuffer[1b][option=TEX]
+
+\startplacefigure[reference=followtext:1]
+ \startcombination[2*2]
+ {\getbuffer[1a]} {}
+ {\getbuffer[1b]} {}
+ \stopcombination
+\stopplacefigure
+
+There are not that many options. One is \type {autoscale} which makes the shape
+and text match. \in {Figure} [followtext:2] shows what happens.
+
+\startbuffer[2a]
+\startMPcode{doublefun}
+ draw lmt_followtext [
+ text = "How well does it work {\bf 3}! ",
+ trace = true,
+ autoscaleup = "yes"
+ ] ysized 5cm ;
+\stopMPcode
+\stopbuffer
+
+\typebuffer[2a][option=TEX]
+
+\startbuffer[2b]
+\startMPcode{doublefun}
+ draw lmt_followtext [
+ text = "How well does it work {\bf 4}! ",
+ path = fullcircle scaled 2cm,
+ trace = true,
+ autoscaleup = "max"
+ ] ysized 5cm ;
+\stopMPcode
+\stopbuffer
+
+\typebuffer[2b][option=TEX]
+
+\startplacefigure[reference=followtext:2]
+ \startcombination[2*2]
+ {\getbuffer[2a]} {}
+ {\getbuffer[2b]} {}
+ \stopcombination
+\stopplacefigure
+
+You can use quite strange paths, like the one show in \in {figure}
+[followtext:3]. Watch the parenthesis around the path. this is really needed in
+order for the scanner to pick up the path (otherwise it sees a pair).
+
+\startbuffer[3]
+\startMPcode{doublefun}
+ draw lmt_followtext [
+ text = "\samplefile {zapf}",
+ path = ((3,0) .. (1,0) .. (5,0) .. (2,0) .. (4,0) .. (3,0)),
+ autoscaleup = "max"
+ ] xsized TextWidth ;
+\stopMPcode
+\stopbuffer
+
+\typebuffer[3][option=TEX]
+
+\startplacefigure[reference=followtext:3]
+ \getbuffer[3]
+\stopplacefigure
+
+The small set of options is:
+
+\starttabulate[|T|T|T|p|]
+\FL
+\BC name \BC type \BC default \BC comment \NC \NR
+\ML
+\NC text \NC string \NC \NC \NC \NR
+\NC spread \NC string \NC true \NC \NC \NR
+\NC trace \NC numeric \NC false \NC \NC \NR
+\NC reverse \NC numeric \NC false \NC \NC \NR
+\NC autoscaleup \NC numeric \NC no \NC \NC \NR
+\NC autoscaledown \NC string \NC no \NC \NC \NR
+\NC path \NC string \NC (fullcircle) \NC \NC \NR
+\LL
+\stoptabulate
+
+\stopchapter
+
+\stopcomponent