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-rw-r--r--Master/texmf-dist/doc/fonts/metafont-for-beginners/metafont-for-beginners.tex1313
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-% begin file mfb3w4.tex %
-\documentstyle[11pt]{article}
-
-% gt: Narrower margins; no marginal notes.
-
-\oddsidemargin=0in
-\evensidemargin=0in
-\marginparwidth=0in
-\marginparsep=0in
-
-% gt: text width that is okay for both Am. Quarto and for A4 paper.
-
-\textwidth=6.25in
-
-% gt: less gap at top of each page; more text height.
-
-\addtolength{\textheight}{\topmargin}
-\topmargin=0in
-\addtolength{\textheight}{0.4in}
-
-% gt: Variant of \METAFONT macro in "texnames.sty":
-% gt: Uses empty discretionary. See _The TeXbook_, p 95.
-\font\mf=logo10
-\font\mfsl=logosl10
-\hyphenchar\mf=-1
-\hyphenchar\mfsl=-1
-% A way to get a hyphen, courtesy of Karl Berry.
-\newcommand{\MF}{{\mf META}\-{\mf FONT\/}}
-\newcommand{\MFSL}{{\mfsl META}\-{\mfsl FONT\/}}
-\newcommand{\MFbook}{{\sl The \MFSL{}book\/}}
-\newcommand{\TeXbook}{{\sl The \TeX{}book\/}}
-\newcommand{\BibTeX}{{\rm B\kern-.05em{\sc i\kern-.025em b}\kern-.08em
- T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}
-\newcommand{\ttbsl}{{\tt \char`\\\/}} % typewriter type backslash.
-
-% gt: employing usual title font for "METAFONT" here.
-\title{%
- \vspace*{-1in}%
- METAFONT for Beginners\\%
- {\normalsize Third Draft, Revision `W4'}\\%
- {\normalsize (14:12 GMT +10 Thursday 14 July 1994)}%
-}
-
-\date{}
-
-\author{Geoffrey {\sc Tobin} ({\tt G.Tobin@ee.latrobe.edu.au})}
-
-\begin{document}
-
-\maketitle
-
-\tableofcontents
-
-\newpage
-
-
-\section*{Scope}%
-\addcontentsline{toc}{section}{Scope}
-
-This is not a tutorial on \MF{}. It is an attempted description of
-how some of the pitfalls in running the program may, hopefully, be
-avoided.
-
-
-\section*{Where you can obtain this file}\label{sec:CTAN}%
-\addcontentsline{toc}{section}{Where you can obtain this file}
-
-For those without ftp, an older version of \MF{} for Beginners can be
-received by email from:
-\begin{verbatim}
- fileserv@shsu.edu
-\end{verbatim}
-by sending the one-line message:
-\begin{verbatim}
- sendme faq.mf
-\end{verbatim}
-
-\MF{} for Beginners can be obtained by ftp from the CTAN
-(Comprehensive \TeX{} Archive Network) sites, in the
-\begin{verbatim}
- documentation
-\end{verbatim}
-subdirectory, as the file
-\begin{verbatim}
- metafont-for-beginners.tex
-\end{verbatim}
-
-The following record of a unix `script' command lists several
-CTAN sites.
-
-\begin{verbatim}
-bash$ script
-Script started on Mon Jun 27 19:17:54 1994
-bash$ finger ctan_us@ftp.shsu.edu
-[ftp.shsu.edu]
-Login name: ctan_us In real life: US CTAN
-Bldg:
-Directory: /pub/mirror/ctan_us Shell: /usr/local/bin/tcsh
-Last login Sun Jun 26 14:59 on ttyp6
-Plan:
-In order to reduce network load, it is recommended that you use the CTAN
-host which is located in the closest network proximity to your site.
-
-The participating hosts in the Comprehensive TeX Archive Network (CTAN) are:
- ftp.dante.de (Germany) /tex-archive (/pub/tex /pub/archive)
- ftp.shsu.edu (Texas, USA) /tex-archive (/pub/tex /pub/archive)
- ftp.tex.ac.uk (England) /tex-archive (/pub/tex /pub/archive)
-
-Known mirrors of the CTAN reside on (alphabetically):
- ftp.center.osaka-u.ac.jp (Japan) /CTAN
- ftp.cs.rmit.edu.au (Australia) /tex-archive
- ftp.loria.fr (France) /pub/unix/tex/ctan
- ftp.uni-bielefeld.de (Germany) /pub/tex
- ftp.uni-stuttgart.de (Germany) /tex-archive (/pub/tex)
- ftpserver.nus.sg (Singapore) /pub/zi/TeX
- src.doc.ic.ac.uk (England) /packages/tex/uk-tex
- sunsite.unc.edu (North Carolina, USA) /pub/packages/TeX
- wuarchive.wustl.edu (Missouri, USA) /packages/TeX
-
-Known partial mirrors of the CTAN reside on (alphabetically):
- dongpo.math.ncu.edu.tw (Taiwan) /tex-archive
- ftp.adfa.oz.au (Australia) /pub/tex/ctan
- ftp.muni.cz (The Czech Republic) /pub/tex/CTAN
- nic.switch.ch (Switzerland) /mirror/tex
- ftp.cs.ruu.nl (The Netherlands) /pub/tex-archive
-Please send updates to this list to <CTAN-Mgr@SHSU.edu>.
-bash$ exit
-exit
-
-script done on Mon Jun 27 19:18:09 1994
-\end{verbatim}
-
-
-\section*{Reference}%
-\addcontentsline{toc}{section}{Reference}
-
-\MFbook{}, by Donald Ervin {\sc Knuth}, published by the
-American Mathematical Society and Addison Wesley Publishing Company.
-First edition, 1986, covers \MF{} 1.0.
-Later editions cover \MF{} 2.0 and above.
-This file is based, except where indicated otherwise,
-on the 1986 edition.\footnote
-{Opinion: I actually enjoy reading \MFbook{},
-whereas \TeXbook{} confuses me no end.}
-
-
-\section*{Acknowledgements}%
-\addcontentsline{toc}{section}{Acknowledgements}
-
-Additions and corrections were kindly contributed by:
-\begin{quote}
-Bill {\sc Alford} ({\tt bill@phys.anu.edu.au}),\\
-Tim A.~H.~{\sc Bell} ({\tt bhat@mundil.cs.mu.oz.au}),\\
-Karl {\sc Berry} ({\tt karl@cs.umb.edu}),\\
-Gert W.~{\sc Bultman} ({\tt bultman@dgw.rws.nl}),\\
-Anita {\sc Zanolini Hoover} ({\tt anita@ravel.udel.edu}),\\
-Berthold K.~P.~{\sc Horn} ({\tt bkph@kauai.ai.mit.edu}),\\
-Micha{\l} {\sc Jaegermann} ({\tt ntomczak@vm.ucs.ualberta.ca}),\\
-\hspace*{4em}and\\
-David {\sc Kastrup} ({\tt dak@pool.informatik.rwth-aachen.de}).
-\end{quote}
-
-Typesetting was initiated by
-\begin{quote}
-Yannis {\sc Haralambous} ({\tt yannis@gat.citilille.fr}).
-\end{quote}
-
-Mistakes remain copyright \copyright{} 1994 Geoffrey {\sc Tobin}.
-
-
-\section*{Motivation}%
-\addcontentsline{toc}{section}{Motivation}
-
-It's a common experience to have initial (and medial and final
-{\tt :-)} ) difficulty with running \MF{}, and not all `\TeX{}nicians'
-are as familiar with \MF{} as they are with \TeX{}. Still, nothing
-ventured, nothing gained. So let's be of good cheer, and get down to
-work.
-
-
-\section{What is \MF{}?}
-
-\MF{} is a program for making bitmap fonts for use by \TeX{},
-its viewers, printer drivers, and related programs.
-It interprets a drawing language
-with a syntax apparently derived in part from the Algol\footnote
-{Around 1960, Donald {\sc Knuth} worked as an Algol compiler
-designer.}
-family of programming languages, of which C, C++, Pascal and Modula-2
-are members.
-
-The input can be interactive, or from a source file.
-\MF{} source files are usually suffixed `{\tt .mf}'.
-
-\MF{} sources can utilize scaling, rotation, reflection, skewing and shifting,
-and other complex transformations in obvious and intuitive ways.
-But that is another story, told (in part) by \MFbook{}.
-
-\MF{}'s bitmap output is a {\sc gf} ({\em generic font\/}) file.
-This may be compressed to an equivalent {\sc pk} ({\em packed\/}) font
-by the auxiliary program {\sf GFtoPK}.
-
-Why doesn't \MF{} output {\sc pk} fonts directly? Firstly, Tomas
-{\sc Rokicki} had not invented {\sc pk} at the time Donald
-E.~{\sc Knuth} was writing \MF{}. Secondly, to change \MF{} now
-would be too big a change in {\sc Knuth}'s opinion. ({\sc Knuth}
-is a very conservative programmer; this fact is a two-sided coin.)
-
-{\sc gf} and {\sc pk} files are suffixed `{\tt .*gf}' and `{\tt .*pk}'
-respectively, where, in a typical {\sc unix} installation, the
-`{\tt *}' stands for the font resolution.
-(Resolution will be explained below.)
-{\sc ms-dos} truncates file name suffixes to three characters, so a
-font suffix `{\tt .1200gf}' becomes `{\tt .120}' --- beware of this!
-
-A bitmap is all that's needed for large-scale {\em proofs},
-as produced by the {\sf GFtoDVI} utility,
-but for \TeX{} to typeset a font it needs a {\sc tfm}
-({\em \TeX{} Font Metric\/}) file to describe the dimensions, ligatures
-and kerns of the font. \MF{} can be told to make a {\sc tfm} file,
-by making the internal variable `{\tt fontmaking}' positive. Most
-output device modes (see subsection \ref{sub:modes} below) do this.
-
-Remember that \TeX{} reads only the {\sc tfm} files.
-The {\em glyphs}, or forms of the characters, as stored in {\sc gf}
-or {\sc pk} font files, do not enter the picture
-(I mean, are not read)
-until the {\sc dvi} drivers are run.
-
-\TeX{} can scale {\sc tfm} files. Unfortunately, bitmaps such as
-{\sc gf} and {\sc pk} are not scalable.
-% deleted "except in integer multiples of their original size".
-% Pixel replication is as inexact an interpolation as other schemes,
-% and does not produce adequate images.
-However, \MF{} files can be compiled into fonts of arbitrary scale
-by \MF{}, even
-by non-programmers --- see subsection \ref{sub:mag}.
-
-Incidentally, properly constructed {\sc tfm} files are
-device-independent, so running \MF{} with different modes normally
-produces the identical {\sc tfm}.
-% This explanation might want a different place...
-Dimensions in {\sc tfm}~files are specified to~\MF{} in device
-independent `sharped' dimensions (commonly suffixed by \#), where
-a~value of~1 corresponds to the dimension of {\tt 1pt} (typographical
-point). Most of \MF{}'s calculations are done with (resolution and
-device dependent) pixels as units. Care must be taken by font
-designers to {\em always\/} calculate unsharped dimensions from sharped
-ones, and never the other way round, so as to keep roundoff errors or
-similar effects from influencing the {\sc tfm} files to depend on
-resolution or device. Although type quality will be influenced only in
-minuscule ways, this is one of the more common reasons for checksum
-errors reported by printer drivers.
-Note that the only way to be sure that a TFM file is device-independent
-is to create the font in different modes and compare the resulting
-TFM's, perhaps using {\sf tftopl}.
-
-More detailed descriptions of {\sc tfm} and {\sc gf} files, and of
-{\em proof\/} mode, are found in Appendices F, G, and H, respectively
-of \MFbook{}.
-
-{\sl The TUG {\sc dvi} Drivers Standard, Level 0}, draft 0.05, includes
-precise definitions of the file structure of {\sc tfm} metrics and of
-{\sc gf} and {\sc pk} bitmap fonts.
-That document is obtainable from CTAN (see section \ref{sec:CTAN}
-above) as the several files in the subdirectory:
-\begin{verbatim}
- dviware/driv-standard/level-0
-\end{verbatim}
-Related information is contained in the documents in the `sister'
-directory
-\begin{verbatim}
- dviware/driv-standard/papers
-\end{verbatim}
-
-
-\section{Getting \MF{}'s Attention}\label{sec:typing}
-
-
-\subsection{Typing at \MF{}'s `{\tt **}' prompt}\label{sub:starstar}
-
-If you type the name of the \MF{} program alone on the command line:
-\begin{verbatim}
- mf
-\end{verbatim}
-then {\tt mf} displays a `{\tt **}' prompt,
-which
-`is \MF{}'s way of asking you for an input file name'.
-(See \MFbook{}, Chapter 5: `Running \MF{}'.)
-Thus, to process a \MF{} file named {\tt fred.mf}, you may type:
-\begin{verbatim}
- fred
-\end{verbatim}
-
-A backslash (`\ttbsl') can also be typed here.
-This causes all subsequent commands at the prompt line to be
-interpreted as in a \MF{} file.
-(Concerning the backslash, see \MFbook{}, Chapter 20:
-`More About Macros', pages 179 and 180 in the 1986 edition.)
-Thus we can respond to the {\tt **} prompt with:
-\begin{verbatim}
- \ input fred
-\end{verbatim}
-or even:
-\begin{verbatim}
- \ ; input fred
-\end{verbatim}
-
-The backslash is useful because
-certain commands are often executed before a \MF{} file is input.
-In particular, quality printing
-(see subsection \ref{sub:modes} below)
-requires the \MF{} command {\tt mode},
-and output magnification
-(subsection \ref{sub:mag})
-employs the {\tt mag} command.
-For example:
-\begin{verbatim}
- \mode=localfont; mag=magstep(1); input fred
-\end{verbatim}
-
-To read {\sc ms-dos} pathnames at the {\tt **} prompt,
-this satisfies \MF{}:
-\begin{verbatim}
- \input \seldom\fred.mf
-\end{verbatim}
-as does:
-\begin{verbatim}
- d:\seldom\fred.mf
-\end{verbatim}
-
-
-\subsection{Typing on the Command Line}\label{sub:cmdline}
-
-Most \MF{} implementations permit you to type \MF{} commands on the
-command line, instead of at the {\tt **} prompt. (Rather, it is
-automatically passed to that prompt.)
-
-On {\sc ms-dos}, type commands as at the {\tt **} prompt:
-\begin{verbatim}
- mf \mode=localfont; input myfont10
-\end{verbatim}
-
-On {\sc unix}, command shells typically interpret semicolons,
-backslashes and parentheses specially, unless they are 'quoted'.
-So, when typing those characters as part of instructions to \MF{}
-on the {\sc unix} command line, it's wise to accustom
-yourself to protecting them with {\em apostrophes\/}:
-\begin{verbatim}
- mf '\mode=localfont; input myfont10'
-\end{verbatim}
-If {\tt localfont} makes fonts for a 300 dots per inch (dpi) device,
-this should produce a {\sc tfm} file, `{\tt myfont10.tfm}',
-and a 300 dpi {\sc gf} font file, `{\tt myfont10.300gf}'.
-Almost all of the following will presume a 300 dpi device, and other
-resolution devices will have appropriately different font file names.
-
-These command lines are a bit long, very often used, and rather
-intolerant of mistakes (see subsection \ref{sub:typo} below),
-so you might type the repetitive parts into a {\sc unix} shell script
-or an {\sc ms-dos} batch file, as appropriate.
-
-In {\sc unix}, the {\tt **} prompt has the advantage that those pesky
-apostrophes are not needed. (Indeed, those apostrophes are always
-wrong at the {\tt **} prompt --- \MF{} doesn't understand them.
-It would not understand them on the command line either---it's just
-that the shell does not hand them over to \MF{}.)
-However, for shell scripts (and for batch files in {\sc ms-dos}),
-the command line is a boon.
-
-For the Macintosh, which is not command line based,
-Tim {\sc Bell} reports that one port of \MF{}
-(by Timothy {\sc Murphy\/} {\tt <tim@maths.tcd.ie>} 22 January 1993)
-simulates the command line within the program
-(using a special THINK C library written just for that).
-But what you type goes through some string processing,
-so you need double `\verb+\+'s.
-Thus your example line reads:
-\begin{verbatim}
- mf \\mode=localfont; input myfont10
-\end{verbatim}
-
-
-\subsection{`{\tt Please type another input file name: }'}%
-\label{sub:another}
-
-When \MF{} cannot find the main source file, it doesn't quit.
-For example, when I typed {\tt mf fred}, \MF{} said:
-\begin{verbatim}
- This is METAFONT ...
- **fred
- ! I can't find file `fred.mf'.
- <*> fred
-
- Please type another input file name:
-\end{verbatim}
-The usual program interrupts (eg, Control-C) don't work here,
-and the `{\tt Please type ...}' prompt does not understand
-\MF{} commands: it will read only the first word, and insist on
-interpreting this as a file name.
-
-Beginners faced with this often wonder how to avoid an endless loop
-or a reboot, or try to think of a \MF{} file that they do have
-in \MF{}'s path. In the latter case, the canonical name to use
-is `{\tt null}', standing for the file `{\tt null.mf}'.
-
-In fact, the solution is much easier: on the
-systems that I have tried, a simple end of file marker
-(`control-Z' in {\sc ms-dos}, `control-D' in {\sc unix})
-stops \MF{} in its tracks:
-\begin{verbatim}
- ! Emergency stop.
- <*> fred
-
- End of file on the terminal!
-\end{verbatim}
-
-
-\section{Base files}\label{sec:base}
-
-In versions 2.7 and 2.71, the \MF{} language contains 224
-(previous versions had fewer) primitives,
-which are the commands preceded by an asterisk in the Index (Appendix I)
-to \MFbook{}. From these we can build more complex operations,
-using macros. In \MF{} macros have some of the desirable
-characteristics of functions in other languages. Collections of
-macros can be stored in \MF{} source files.
-
-{\em Base\/} files are {\em precompiled internal tables\/} that \MF{}
-loads faster than it loads the original \MF{} source files.
-Thus, they are closely analogous to \TeX{}'s {\em format\/} files.
-
-
-\subsection{The {\tt plain} base}\label{sub:plain}
-
-The {\tt plain} base provides the commands that \MFbook{}
-describes. (See Appendix B of \MFbook{}, if you have it around
---- maybe a library has it --- I'm learning from a copy borrowed from the
-local university's library.)
-
-When it starts, \MF{} automatically loads\footnote
-{There are releases of \MF{} that contain the {\tt plain} base,
-and so don't have to load it. However, on most computers, including
-personal computers, reading bases is so fast that such a {\em preloaded\/}
-base is unnecessary.}
-the {\tt plain} base.
-This is usually called {\tt plain.base}, or sometimes only (see
-subsection~\ref{sub:link} for why this works) {\tt mf.base},
-although for those systems concerned (such as {\sc unix}),
-both file names should really be present.
-
-Em\TeX{} for {\sc ms-dos} calls the plain base {\tt plain.bas},
-due to filename truncation.
-
-
-\subsection{Loading a Different Base}\label{sub:loading}
-
-Suppose that you have a base named {\tt joe.base}.
-Typing
-\begin{verbatim}
- mf &joe
-\end{verbatim}
-or (on unix, where we must either quote or escape the ampersand)
-\begin{verbatim}
- mf \&joe
-\end{verbatim}
-or responding
-\begin{verbatim}
- &joe
-\end{verbatim}
-to the {\tt **} prompt,
-omits loading {\tt plain} base, and loads the {\tt joe} base instead.
-Typically, however, the {\tt joe.mf} file which originally produced
-the {\tt joe} base will have included {\tt plain.mf}, because working
-without the {\tt plain} base macros would be too cumbersome.
-(Refer to \MFbook{} (1986), Chapter 5: `Running \MF{}', page 35,
-`dangerous bend' number two.)
-
-The `{\tt cm}' base, for making the {\sc Computer Modern} fonts,
-can be loaded in that way:
-\begin{verbatim}
- mf &cm
-\end{verbatim}
-Remember to quote the ampersand under {\sc unix}!
-
-
-\subsection{The Linkage Trick}\label{sub:link}
-
-On systems such as {\sc unix} where programs can read their own
-command line name, and where files may be linked to two or more
-names, then programs can modify their behavior according to the
-name by which they are called. Many {\sc unix} \TeX{} and \MF{}
-installations exploit this in order to load different {\em format\/}
-and {\em base\/} files, one for each of the various names to which
-\TeX{} and \MF{} are linked. Such installations can often
-be recognised by the presence of the executable `{\tt virmf}'
-in one of the directories in the {\tt PATH}.
-
-For example, if a base file called `{\tt third.base}' resides where
-\MF{} can find it (see section \ref{sub:env} below), then
-{\tt virmf} can be linked to {\tt third}.
-In {\sc unix}, a {\em hard link\/} is formed by
-\begin{verbatim}
- ln virmf third
-\end{verbatim}
-
-On systems supporting {\em symbolic links\/}, you should make all of
-these links symbolic, rather than hard, or else you will have to redo
-them every time you install a new copy of~{\tt virmf}; see below.
-In {\sc unix}, this is done by
-\begin{verbatim}
- ln -s virmf third
-\end{verbatim}
-
-Normally one wants {\tt mf} to load the {\tt plain} base,
-so in such installations one links {\tt plain.base} to {\tt mf.base}:
-\begin{verbatim}
- ln plain.base mf.base
-\end{verbatim}
-Again, you'd best make that link symbolic. This comment applies for
-the rest of this section as well.
-
-As another example, take the `{\tt cm}' base. In {\sf web2c}:
-\begin{verbatim}
- ln virmf cmmf
- ln cm.base cmmf.base
-\end{verbatim}
-so that `{\tt cmmf}' automatically loads `{\tt cm.base}'.
-
-This applies equally to \TeX{}, which is why {\tt tex} and {\tt latex}
-are then links to {\tt virtex}, {\tt tex.fmt} is a link to
-{\tt plain.fmt}, and {\tt latex.fmt} is a link to {lplain.fmt}:
-\begin{verbatim}
- ln virtex tex
- ln plain.fmt tex.fmt
-
- ln virtex latex
- ln lplain.fmt latex.fmt
-\end{verbatim}
-
-Karl {\sc Berry\/}'s {\sf web2c} distribution for {\sc unix} uses
-this `{\em linkage trick\/}'.
-
-If you used symbolic links, you can laugh off the following
-
-{\sc Warning:}
-This linkage is convenient, but watch out during updates!
-If {\tt mf.base} is a {\em hard link\/}
-to {\tt plain.base}, then replacing {\tt plain.base} with its
-new version severs the link: {\tt mf} will still load {\tt mf.base},
-but it will be the old version! The proper procedure is to remove
-the old {\tt mf.base}, and relink. On {\sc unix}:
-\begin{verbatim}
- rm mf.base
- ln plain.base mf.base
-\end{verbatim}
-On most {\sc unix\/} systems, {\tt ln -f} will automatically remove
-the second file (if present) --- in this case, mf.base --- before linking.
-
-Alternatively, {\sf web2c} will update `{\tt plain.base}'
-(and `{\tt plain.fmt}', and so on) for you,
-if you tell {\sf web2c\/}'s {\tt Makefile} to
-\begin{verbatim}
- make install
-\end{verbatim}
-Symbolic links, on systems that have them, are probably the best
-method of handling updates, at least when doing them manually.
-(Consult your system administrator for details.)
-
-
-\subsection{Making a Base; the Local Modes file}\label{sub:modes}
-
-The {\tt plain} base is made from a \MF{} file named
-{\tt plain.mf} and, commonly, from some other file, often called
-{\tt local.mf} or {\tt modes.mf}.
-
-The {\tt local}/{\tt modes} file lists printers (and monitors), giving
-each output device a font-making {\em mode\/}, containing a
-description of some refinements that must be made in order to produce
-good-looking output. For instance, how to make the characters just
-dark enough, and how to make diagonal lines come out sharply.
-
-If you want to make a base, you need a variant of the \MF{} program
-called `{\tt inimf}'. (See \MFbook{}, p 279.) For example,
-{\tt plain.base} can be made in {\sc unix} by typing:
-\begin{verbatim}
- inimf 'plain; input local; dump'
-\end{verbatim}
-If using the em\TeX{} version of \MF{} for a {\sc pc}, type:
-\begin{verbatim}
- mf/i plain; input local; dump
-\end{verbatim}
-
-
-\section{Fonts}\label{sec:fonts}
-
-
-\subsection{Proof Mode}\label{sub:proof}
-
-The purpose of \MF{} is to make fonts. For \ae{}sthetically pleasing
-{\sc pk} bitmaps, the correct device mode must be selected.
-
-An obstacle to beware of is that {\tt plain} \MF{} uses
-{\em proof\/} mode by default.
-(\MFbook{}, page 270, defines this mode.)
-That means writing unmagnified font files with a resolution of
-2601.72 dots per inch (dpi); that's 36 pixels per point. (One
-point is 1/72.27 of an inch.) Proof mode does {\bf not} produce a
-{\sc tfm} file.
-
-What good is proof mode, and why is it the default?
-{\em Proofs\/} are blown up copies of characters used by font
-designers to judge whether they like the results of their work.
-Naturally, proofs come first, and normal sized character production
-later --- if you're a font designer.
-
-So there are two clues that proof mode is on: font files with
-extensions like `{\tt .2602gf}' (or on {\sc ms-dos}, `{\tt .260}'),
-and the `failure' to produce any {\sc tfm} file.
-
-On some systems, such as {\sc X11}, a third clue is that the proof
-font may be drawn on the screen --- it's so large, you can't miss it!
-
-
-\subsection{Localfont Mode}\label{sub:localfont}
-
-When using a stable font, or when testing the output of a new font,
-we {\em don't\/} want proof mode,
-we want our local output device's mode.
-Usually, \MF{} is installed with a `{\tt localfont}'
-assigned in the {\tt local}/{\tt modes} file.
-On our department's Sun Network, we have assigned
-\begin{verbatim}
- localfont:=CanonCX
-\end{verbatim}
-We use Karl {\sc Berry\/}'s `{\tt modes.mf}'\footnote
-{Available at {\tt ftp.cs.umb.edu} in the {\tt pub/tex} directory.},
-which contains modes for many, many devices. We chose the
-{\tt CanonCX} mode because `{\tt modes.mf}' recommends it for Apple
-Laserwriters and HP Laserjet~II printers, which we use.
-
-To process a \MF{} source file named `{\tt myfont10.mf}' for the most
-usual local device, specify the local mode to {\tt mf} before
-inputting the font name:
-\begin{verbatim}
- \mode=localfont; input myfont10
-\end{verbatim}
-This should produce a {\sc gf} font file, `{\tt myfont10.300gf}'
-(`{\tt myfont10.300}' in {\sc ms-dos}),
-and a {\sc tfm} file, `{\tt myfont10.tfm}'.
-
-
-\subsection{Font Naming}\label{sub:naming}
-
-By the way, if you modify an existing, say a {\sc Computer
-Modern (cm)}, font, you must give it a new name. This is an honest
-practice, and will avoid confusion.
-
-
-\subsection{Using a New Font in \TeX{}}\label{sub:tex}
-
-To use a new font in a \TeX{} document, select it specifically.
-Example: in a \TeX{} macro file, or in a \LaTeX{} style file,
-to define \verb+\mine+ as a font-selection command for
-`{\tt myfont10.tfm}', say:
-\begin{verbatim}
- \font\mine=myfont10
-\end{verbatim}
-
-Then to typeset `Mary had a little lamb,' in the {\tt myfont10} font,
-and then to revert to the previous font, type
-\begin{verbatim}
- {\mine Mary had a little lamb,}
-\end{verbatim}
-Note, however, that this will not change the line spacing parameters
-of \TeX{} as
-well. If your lines appear a little too cramped and unevenly spaced vertically,
-it is very probable that you need to increase \verb+\baselineskip+.
-For \LaTeX{} users, a simple remedy is to just select a larger font
-before your own. Also, end your paragraph by an empty line or a
-\verb+\par+ command before the closing brace, or your line spacing changes
-will be cancelled before the paragraph has a chance of being typeset.
-
-
-\subsection{Magnification (and Resolution)}\label{sub:mag}
-
-Now suppose that you want {\tt myfont10} to be magnified,
-say to magstep 1 (magnified by 1.2), for a `jumbo' printer.
-Assuming that the {\tt local}/{\tt modes} file has a mode
-for the jumbo printer,
-you may then run \MF{} with the following three commands:
-\begin{verbatim}
- \mode=jumbo; mag=magstep(1); input myfont10
-\end{verbatim}
-to produce `{\tt myfile10.tfm}' (again!)
-and a {\sc gf} font, `{\tt myfile10.360gf}'.
-On {\sc ms-dos}, the file names will be truncated;
-for example, `{\tt myfile10.360}'.
-
-The `{\tt 360}' is `300 {\tt *} 1.2', indicating the magnification.
-A 360 dpi font can be used either as a magnification 1.2 font on
-a 300 dpi printer or as a normal sized font on a 360 dpi printer.
-
-Note, however, that the \MF{} language includes special hints for
-each output device which clue \MF{} as to the reactions of the
-output device to pixel-sized minuscule changes.
-
-So for highest quality, you would not even want to mix the fonts for
-two 300~dpi printers, unless they share the same mode and most probably
-the same print engine.
-
-
-\subsection{{\sf GFtoPK}}\label{sub:gftopk}
-
-\TeX{} uses only the {\sc tfm} file, which \MF{}
-will produce if it's in a font-making mode.
-(\MFbook{}, Appendix F.)
-Most {\sc dvi} drivers read the {\sc pk} font format,
-but \MF{} makes a {\sc gf} (Generic Font) file.
-So we need also to apply the {\sf GFtoPK} utility:
-\begin{verbatim}
- gftopk myfile10.300gf
-\end{verbatim}
-to produce the wanted `{\tt myfile.300pk}'
-(or, on {\sc ms-dos}, `{\tt myfile.pk}')
-{\sc pk} font.
-
-
-\subsection{Storing the Fonts}\label{sub:store}
-
-Now we have the fonts, where do we store them? \TeX{}, \MF{} and
-the various driver programs are compiled with default locations
-written in.
-These can be overridden by certain environment variables.
-The names of these variables differ between systems,
-but on {\sc unix} they might, for example, be `TEXFONTS' for the
-{\sc tfm} files, and either `PKFONTS' or `TEXPKS' (or both of those)
---- before searching `TEXFONTS' --- for {\sc pk} fonts.
-You can find out what environment variables you now have
-by typing `{\tt set}' in {\sc ms-dos} and `{\tt env}' in the Bourne shell, sh,
-% `set' in the Bourne shell is dangerous, because it gives the values
-% of non-environment variables of the shell as well. If you forgot
-% to say export, you might have some time detecting your omission
-% if you use just `set'.
-in {\sc unix}. In the {\sc unix} C shell, {\tt csh}, type
-`{\tt setenv}'.
-
-Micha{\l} {\sc Jaegermann} notes that on a `virgin' installation
---- in which everything is in default directories and no environment
-variables have yet been set --- that won't succeed. Presumably we're
-talking to system installers now. So, as a first resort:
-\begin{quote}
- \em Read The Manual.
-\end{quote}
-As a last resort, one can discover default values and environment
-variable names by using a command like {\sc unix}'s {\tt strings}
-on the executable files.
-For instance:
-\begin{verbatim}
- strings -6 /bin/virmf | less
-\end{verbatim}
-(Use `more' or `pg' for paging, if `less' is not available.)
-Seeking 6-letter names is about right, as ``{\tt TEXPKS}'' has six
-letters, while {\tt strings\/}' default of four collects too much
-random noise.
-Environment variables are usually in upper case, and their names
-strongly hint at their purposes.
-Default locations may be discovered by looking for path name strings.
-
-Using this advice may show some undocumented names.
-If you have the program sources, you may check their purpose.
-Otherwise, not to worry, the important ones should be self-evident.
-As an illustration, here are some environment variable names found by
-applying ``strings -6'' to {\sc Rokicki's} {\tt dvips}:
-\begin{verbatim}
- * DVIPSHEADERS
- HOME
- * PKFONTS
- PRINTER
- TEXCONFIG
- TEXFONTS
- TEXINPUTS
- * TEXPACKED
- * TEXPICTS
- TEXPKS
- VFFONTS
-\end{verbatim}
-The four starred names are not documented by the {\tt dvips} manual
-(for version 5.484).
-In Karl {\sc Berry's} {\tt dvipsk}, a variant of {\tt dvips},
-{\tt DVIPSHEADERS}\footnote{In version 5.518b, which is forthcoming.},
-{\tt PKFONTS} and {\tt TEXPICTS} {\em are\/}
-documented, while {\tt TEXPACKED} is {\em not used}.
-
-If you want \TeX{} and \MF{} to find files in the current directory
-(as you almost certainly do!), then one way is to put `{\tt .}' into
-their search paths.
-(Both {\sc unix} and {\sc ms-dos} accept the {\tt .} notation
-for the current directory.)
-Default search paths are compiled into \TeX{} and \MF{}, but users
-can customise the environment variables (see subsection \ref{sub:env})
-that the programs read, to override the defaults.
-
-\MF{} (as illustrated in section \ref{sec:typing} above),
-as well as the {\sc dvi} drivers,
-can also be given full path specifications for input files.
-(On most systems, so can \TeX{}, but, as Berthold K.~P.~{\sc Horn}
-({\tt bkph@kauai.ai.mit.edu}) has observed,
-{\sc ms-dos} poses the problem that the backslash `\ttbsl{}'
-used in {\sc ms-dos} path names is very special in \TeX{} input.
-However, I'll leave solving that one to the \TeX{}ackers.)
-
-On the other hand, you may be content with your new font, and you may
-have write access to the place where most of the fonts are stored. In
-that case, copy your font to there. There will be a place for the
-{\sc tfm} files, and another for the {\sc pk} files. It's up to you
-or your local system administrator(s) to know where these directories
-are, because their names are very locale dependent.
-
-
-\subsection{Environment Variables for em\TeX{} and {\sf web2c}}%
-\label{sub:env}
-
-Environment variables often cause confusion, as they vary unpredictably
---- sometimes subtly, sometimes widely --- between systems.
-
-Em\TeX{} for {\sc ms-dos} and {\sf web2c} for {\sc unix} are two
-popular distributions of \TeX{}, \MF{}, and associated programs.
-It's worthwhile therefore to compare their environment variables.
-
-Firstly, the variables used leading up to the production of the
-{\sc dvi} file:
-
-\begin{center}
-\begin{tabular}{|l|l|l|}
- \hline
- \multicolumn{3}{|c|}{\TeX{}, \BibTeX{}, \MF{} and {\sf MFjob}} \\
- \hline
- Seeking & em\TeX{} & {\sf web2c} \\
- \hline
- \TeX{} Pool file & {\tt TEXFMT}, {\tt BTEXFMT} & {\tt TEXPOOL} \\
- \TeX{} Formats & {\tt TEXFMT}, {\tt BTEXFMT} & {\tt TEXFORMATS} \\
- \TeX{} Inputs & {\tt TEXINPUT} & {\tt TEXINPUTS} \\
- \TeX{} Font Metrics & {\tt TEXTFM} & {\tt TFMFONTS, TEXFONTS} \\
- \hline
- \BibTeX{} {\tt bst} & {\tt TEXINPUT} & {\tt BSTINPUTS, TEXINPUTS} \\
- \BibTeX{} {\tt bib} & {\tt BIBINPUT} & {\tt BIBINPUTS} \\
- \hline
- \MF{} Pool & {\tt MFBAS, BMFBAS} & {\tt MFPOOL} \\
- \MF{} Bases & {\tt MFBAS, BMFBAS} & {\tt MFBASES} \\
- \MF{} Inputs & {\tt MFINPUT} & {\tt MFINPUTS} \\
- {\sf MFjob} Inputs & {\tt MFJOB} & \multicolumn{1}{c|}{---} \\
- \hline
-\end{tabular}
-\end{center}
-
-The second table compares the environment variables used by em\TeX{}'s
-{\sc dvi} drivers with those for Tomas {\sc Rokicki\/}'s portable
-{\sf PostScript} driver, {\tt dvips}.
-
-\begin{center}
-\begin{tabular}{|l|l|l|}
- \hline
- \multicolumn{3}{|c|}{{\sc dvi} Drivers} \\
- \hline
- Seeking & em\TeX{} Drivers & {\tt dvips} \\
- \hline
- {\sc dvi} files & {\tt DVIDRVINPUT} & {\em current directory} \\
- {\sc pk} Fonts & {\tt DVIDRVFONTS} & {\tt TEXPKS, PKFONTS} \\
- Bitmap Graphics & {\tt DVIDRVGRAPH} & \multicolumn{1}{c|}{---} \\
- Virtual Fonts & set by {\tt /pv} option & {\tt VFFONTS, TEXFONTS} \\
- {\tt MakeTeXPK} & \multicolumn{1}{c|}{---} & {\tt MAKETEXPK} \\
- {\tt config.ps} & \multicolumn{1}{c|}{---} & {\tt TEXCONFIG} \\
- {\sc ps} files & \multicolumn{1}{c|}{---} & {\tt TEXINPUTS} \\
- \hline
-\end{tabular}
-\end{center}
-
-Where two or more variables are listed together, they are
-searched from left to right. For example, {\tt dvips} seeks {\sc pk}
-fonts first in {\tt TEXPKS}, then in {\tt PKFONTS}.
-By the way, if no {\sc pk} fonts can be found, then {\tt dvips}
-uses the {\sc tfm} files to determine spacing, and leaves the
-characters blank.
-
-{\sc Berry}'s {\tt dvipsk} seeks {\sc pk} fonts in whichever
-{\em one\/} of {\tt PKFONTS, TEXPKS, GLYPHFONTS} and {\tt TEXFONTS}
---- in that order --- is set and of the highest priority.
-If a font cannot be found via environment variables, then the
-compile-time system default paths are searched; any lower priority
-font path environment variables are ignored --- which may also be the
-behavior of Rokicki's {\tt dvips}, but readers are encouraged to
-discover the truth for themselves.
-In addition, {\tt dvipsk} seeks {\sc gf} fonts using the successive
-environment variables {\tt GFFONTS, GLYPHFONTS} and {\tt TEXFONTS}.
-
-{\sf MFjob} and {\tt MakeTeXPK} have a similar function:
-to create {\sc pk} fonts from \MF{} files.
-When {\sc pk} fonts are missing, but the \MF{} font sources
-are available,
-{\sf MFjob} can be called by recent versions (1.4r and above)
-of the em\TeX{} drivers to create the missing fonts.
-{\tt MakeTeXPK} is called by {\tt dvips} for the same purpose.
-
-In {\sc Berry\/}'s {\tt web2c 5.851d}\footnote
-{Available at {\tt ftp.cs.umb.edu} in the {\tt pub/tex} directory.},
-\TeX{} can be configured to call {\tt MakeTeXTFM} and
-{\tt MakeTeXTeX}, and \MF{} to call {\tt MakeTeXMF},
-to make missing {\sc tfm}, \TeX{}, and \MF{} files, respectively.
-{\tt MakeTeXTFM}, like {\tt MakeTeXPK}, can call \MF{}.
-Design of {\tt MakeTeXTeX} and {\tt MakeTeXMF} are up to the user's
-imagination --- Karl says that one possibility is to employ {\tt ftp}.
-
-
-\section{Some Limitations of \MF{}}\label{sec:limit}
-
-\MF{} contains some builtin limitations, some obvious, others
-less so.
-
-Parts of the following list are most useful to budding programmers,
-though casual users may wish to read it to learn whether
-an error message produced by somebody else's \MF{} file is very
-serious or not.
-
-\begin{enumerate}
-\item
-All valid numbers are strictly less than 4096.
-
-\item
-\MFbook{}, in `Appendix F: Font Metric Information',
-warns of one limitation that I've met when processing some fonts.
-
-`At most 15 different nonzero heights, 15 different nonzero depths,
-and 63 different nonzero italic corrections\footnote{Respectively,
-{\tt charht}, {\tt chardp} and {\tt charic} values.}
-may appear in a single font. if these limits are exceeded,
-\MF{} will change one or more values, by as little as possible,
-until the restriction holds. A warning message is issued if such
-changes are necessary; for example
-
-{\small\tt (some charht values had to be adjusted by as much as 0.12pt)}
-
-means that you had too many different nonzero heights, but \MF{}
-found a way to reduce the number to at most 15 by changing some of them;
-none of them had to be changed by more than 0.12 points.
-No warning is actually given unless the maximum amount of perturbation
-exceeds $\frac{1}{16}$ pt.'
-
-Every correct implementation of \MF{} will adjust character box
-dimensions by the same amount, giving the same {\sc tfm} files, so we
-ignore small perturbations in other people's fonts. When designing
-your own fonts, however, I think it's courteous to keep within the
-limits, so as not to worry inexperienced users.
-
-\item
-In the {\tt addto} picture command, {\tt withweight} only accepts
-values that round to {\tt -3}, {\tt -2}, {\tt -1}, {\tt +1}, {\tt +2},
-or {\tt +3}. To obtain other pixel weights, you can apply further
-{\tt addto} commands.
-
-\item
-The memory size of the version of \MF{} you use is an evident,
-implementation dependent restriction, but it may be, as in \TeX{},
-that memory is not enough simply because, if you'll pardon my saying
-so, some of your coding may be seriously inefficient or logically
-invalid.
-\end{enumerate}
-
-
-\section{What Went Wrong?}
-
-The complexity of wrong things far exceeds that of things intended.
-
-References for some of the subsequent points:
-
-\MFbook{}, chapter 5, `Running \MF{}', contains
-instructive examples, and supposedly `dangerous', but actually basic
-and useful, notes.
-
-In that chapter, and in chapter 27, `Recovery from Errors', {\sc Knuth}
-discusses the diagnosis of \MF{}'s error messages. I find this
-perhaps the hardest part of the book --- if not of using \MF{}.
-
-Incidentally, \MF{}'s error messages are contained in an ASCII
-file called `{\tt mf.pool}'. Reading the {\tt pool} file can be
-entertaining.
-
-
-\subsection{Big fonts, but Unwanted}\label{sec:proof}
-
-Recently, I found myself accidentally producing fonts with extensions
-like `{\tt 3122gf}'. How?
-
-{\em \MF{} will take\/ {\bf anything} as an excuse to revert
-to\/ {\bf proof mode}.}
-
-The `{\tt 3122}' is a magstep 1 proof mode. It's
-\begin{verbatim}
- (1.2)^1 * 2601.72 = 3122.164 dots per inch.
-\end{verbatim}
-
-My intention was for \MF{} on a PC to use an HP Laserjet mode in
-place of proof mode. However, \MF{}'s command line resembles
-the law: {\em every stroke of the pen is significant}. What I had
-forgotten was that on my setup, `{\tt localfont}' must be explicitly
-requested.
-
-Em\TeX{}'s \MF{}, with {\tt plain.mf}, defaults to proof mode.
-However, I usually want a local printer's font-making mode.
-So to process {\tt pics.mf} correctly, I need to say:
-\begin{verbatim}
- mf '\mode=localfont; input pics'
-\end{verbatim}
-
-
-\subsection{Consequences of Some Typing Errors on \MF{}'s
- command line}\label{sub:typo}
-
-Small typing errors are so common, and yet undocumented (why are
-common mistakes not documented?), that I thought I'd list several that
-have tripped me up on innumerable occasions. After all, why reinvent
-the car crash?
-
-Consider a source file `{\tt pics.mf}' that contains `{\tt mag=1200/1000;}',
-so it is automatically scaled by 1.2 (ie, by magstep 1). If the target
-printer has 300 dpi, then a 360 dpi {\sc gf} font is wanted.
-
-Here is the gist of what happens for various typing errors, when using
-em\TeX{}'s `{\tt mf186}' on a 286 {\sc pc} to process `{\tt pics.mf}'.
-
-\begin{enumerate}
-\item
-\verb+mf186+ $\Longrightarrow$ \MF{} will keep prompting for arguments:
-\begin{verbatim}
- **
-\end{verbatim}
-
-We can type the contents of the command line here; for example, I can
-now type `{\tt pics}'. In fact, even if you use the command line,
-the {\tt .log} (`transcript') file shows \MF{} echoing its
-interpretation of the command line to a ** prompt.
-
-\item \verb+mf186 pics+ $\Longrightarrow$ proof mode:
-
-\begin{verbatim}
- ! Value is too large (5184)
-\end{verbatim}
-
-No {\sc tfm} is produced, and the {\sc gf} file has resolution 3122 dpi.
-(3121.72 dpi, to be precise.)
-
-\item \verb+mf186 mode=localfont; input pics+ $\Longrightarrow$ misinterpretation:
-\begin{verbatim}
- ! I can't find file `modes=localfont.mf'.
-\end{verbatim}
-
-So, `{\tt modes}' needs that backslash, otherwise mf thinks it's the start
-of a source font's filename. Backslash (`$\backslash$') and ampersand
-(`\&') are escapes from this standard interpretation by \MF{}
-of the first argument. (Ampersand is in fact only a temporary escape,
-as \MF{} resumes the {\tt mf} filename prompting attitude as soon
-as a base is read.)
-
-\item \verb+mf186 \mode=localfont input pics+ $\Longrightarrow$
- weird effect:
-\begin{verbatim}
- >> unknown string mode_name1.2
- ! Not a string
- <to be read again>
- ;
- mode_setup-> ...ode)else:mode_name[mode]fi;
- l.6 mode_setup
- ;
-\end{verbatim}
-
-Wow! What a difference a semicolon can make!
-
-\item \verb+mf186 \mode=localfont pics+ $\Longrightarrow$
- almost nothing happens:
-\begin{verbatim}
- ** \mode=localfont pics
-
- *
-\end{verbatim}
-
-There's the echo I mentioned. From the lack of activity, {\tt pics}
-evidently needs to be `{\tt input}'.
-
-\item \verb+mf186 \mode=localfont; pics+ $\Longrightarrow$
-
- Same as 5.
-
-So, yes, when the mode is specified, we need `{\tt input}'
-before `{\tt pics}'.
-
-\item \verb+mf186 &plain \mode=localfont; input pics+ $\Longrightarrow$
-
- Works.
-
-Just as without the `{\tt \&plain}', it writes a {\sc gf} file,
-`{\tt pics.360gf}', which is correct.
-({\sc ms-dos} truncates the name to `{\tt pics.360}'.)
-So, redundancy seems okay. Does it waste time, though?
-\end{enumerate}
-
-
-\subsection{Finding the Fonts}\label{sub:finding}
-
-Finding the fonts ({\tt *.mf}, {\tt *.tfm}, {\tt *.gf}, and {\tt *.pk})
-trips up \TeX{}, \MF{}, {\sf GFtoPK} and the output drivers continually.
-`{\tt pics.tfm}' needs to be put where \TeX{} will look for {\sc tfm\/}s,
-so I needed to ensure that `{\tt .}' was in the appropriate path environment
-variable. Similarly for the \MF{}, {\sc gf} and {\sc pk} font files.
-
-Environment variables can be tricky. For instance, em\TeX{}'s font-making
-automation program `{\sf MFjob}' cannot make fonts in the current directory
-unless both `{\tt .}' and `{\tt ..}' are added to {\tt MFINPUT}.
-This was not documented.
-
-Also, some popular \TeX{} output drivers, such as the em\TeX{} drivers
-on {\sc ms-dos} and {\sc os/2}, and Tomas {\sc Rokicki\/}'s `{\tt dvips}'
-which has been ported to many systems, make missing fonts automatically
---- provided that they can find the necessary \MF{} source files.
-Again, making fonts in the current directory can require some
-tweaking.
-
-
-\subsection{{\tt MakeTeXPK}}\label{sub:maketexpk}
-
-On {\sc unix}, when fonts are missing,
-{\tt dvips} calls a Bourne shell script, `{\tt MakeTeXPK}',
-which creates a temporary directory, which it then changes to,
-before calling \MF{} to make the missing fonts.
-The change of directory can cause \MF{} not to find font sources
-lying in what {\bf used} to be the current directory.
-
-Gert W.~{\sc Bultman} ({\tt bultman@dgw.rws.nl}) has suggested the
-following modification to {\tt MakeTeXPK\/}:
-\begin{verbatim}
- MFINPUTS=${MFINPUTS}:`pwd`; export MFINPUTS
-\end{verbatim}
-to add the current directory to the search path, {\em before\/} the
-change to the temporary directory:
-\begin{verbatim}
- cd $TEMPDIR
-\end{verbatim}
-
-Micha{\l} {\sc Jaegermann} ({\tt ntomczak@vm.ucs.ualberta.ca})
-has pointed out that:
-
-`This will not work very well in a situation when the {\tt MFINPUTS} variable
-is not set, and you rely instead on \MF{} files being in a default
-location. The problem is that in such a situation, after an execution
-of the line above, you will end up with ONLY your 'current working
-directory' in the {\tt MFINPUTS} path, [which still leaves you
-without access to the standard \MF{} files].
-
-`For the Bourne shell, {\tt sh}, this line should rather read
-somewhat\footnote
-{gt: I've separated this into two (valid, unix Bourne shell) lines,
-to fit into the text width of this document.}
-like:
-\begin{verbatim}
- MFINPUTS=`pwd`:${MFINPUTS-/usr/lib/mf/inputs}
- export MFINPUTS
-\end{verbatim}
-which gives you a fallback position. Of course,
-\begin{verbatim}
- /usr/lib/mf/inputs
-\end{verbatim}
-should be replaced by a default value for the {\tt MFINPUTS} path.
-
-`This problem is highly likely to affect budding \MF{} hackers
-on {\sf NeXT}, for example.'
-
-Micha{\l}'s suggestion gives priority to \MF{} files in the directory that
-is current when MakeTeXPK is called, which is the usual preference.
-In {\tt sh}, the `{\tt \${A-B}}' construction has the value of {\tt A},
-if {\tt A} is defined, and the value of {\tt B}, otherwise.
-
-Karl {\sc Berry} advises that for {\tt web2c 5.851c} and above,
-a leading or trailing colon in a path is replaced by the compile-time
-default path. For {\tt web2c} he suggests:
-\begin{verbatim}
- if test -z "$MFINPUTS"; then
- MFINPUTS=`pwd`:
- else
- MFINPUTS=`pwd`:$MFINPUTS:
- fi
-\end{verbatim}
-
-Test these ideas on your system, to see what is most applicable.
-
-Incidentally, on {\sc ms-dos}, {\tt dvips} calls a batch file,
-`{\tt MAKETEXP.BAT}', but, in the {\sc ms-dos} versions I've seen,
-this lacks the change to a temporary directory that causes
-the problem that occurs both in the {\sc unix} versions of {\tt dvips}
-and in em\TeX{}'s MFjob.
-
-
-\subsection{Strange Paths; Not a cycle; Bad pos}
-
-\MF{} satisfactorily fills simple closed curves, like `{\tt O}'
-and `{\tt D}', but filling a figure eight, `{\tt 8}', causes a
-complaint:
-\begin{verbatim}
- Strange path (turning number is zero)
-\end{verbatim}
-because \MF{}'s rules for distinguishing inside from outside
-might or might not give what you want for an `{\tt 8}', as there is
-more than one conceivable answer. You can use the `positive turning
-rule' for all cases, and also turn off complaints, by setting
-\begin{verbatim}
- turningcheck := 0;
-\end{verbatim}
-Chapter 13: `Drawing, Filling, and Erasing', and Chapter 27:
-`Recovery from Errors', discuss {\tt strange paths} in greater
-depth.
-
-
-Sometimes, when making a perfectly valid font, but in {\em low\/}
-resolutions, as for previewers (eg, VGA has 96 dpi), one may get
-flak about a `{\tt Strange path}', `{\tt Not a cycle}',
-`{\tt bad pos}', or something similar. Don't be alarmed. Fonts for
-previewing will still be OK even if not perfect. (Actually, I don't
-spot any difference!)
-
-Consequently, it is an idea to make low resolution fonts in
-\MF{}'s \hbox{\tt nonstopmode}.
-
-Em\TeX{}'s drivers version 1.4s make missing fonts automatically
-through the {\tt MFjob} program (version 1.1l). To keep {\tt MFjob}
-running, add the option {\tt /i} (`ignore errors produced by \MF{}')
-to the {\tt MFJOBOPT} environment variable.
-
-Examples of fonts that give messages of this nature are the pleasant
-Pandora, and --- from memory --- the commendable Ralf Smith's
-Formal Script ({\tt rsfs}). Everything is fine at higher resolutions.
-
-Mind you, some fonts provoke sporadic
-(that is, design size dependent)
-strange path messages at 300 dpi
-(phototypesetter users would consider that low resolution),
-yet the printed appearance shows no visible defect.
-
-Why do strange paths occur?
-One cause is rounding error on relatively coarse grids.
-
-To summarize, if your viewed or printed bitmaps are fine,
-then you are OK.
-
-
-\section{\MF{} Mail List}
-
-Since 10 December 1992, there has been an e-mail discussion list
-for \MF{}, created:
-
-\begin{enumerate}
-\item as a means of communication between hooked \MF{}ers;
-
-\item as a way to bring the ``rest of us'' closer to them;
-
-\item as a means to get quick and efficient answers to questions
- such as:
-
-\begin{itemize}
- \item[$\circ$] why do I always get a ``.2602gf'' file?
- \item[$\circ$] what is a ``strange path'',
- and what can I do to avoid it?
- \item[$\circ$] is there a way to go from \MF{} to PostScript
- and vice-versa?
- \item[$\circ$] where can I find a Stempel Garamond font
- written in \MF{}?
- \item[$\circ$] what is metaness?
-\end{itemize}
-
-\item and finally, as a first step to encourage people to undertake
- \MF{}ing, and start a new post-Computer Modern era of \MF{}!
-\end{enumerate}
-
-To subscribe to this list, send the following two lines to
-``{\tt listserv@ens.fr}'' on the Internet:
- \begin{quote}
- \tt
- SUBSCRIBE METAFONT $<$Your name and affiliation$>$\\
- SET METAFONT MAIL ACK
- \end{quote}
-The address of the list is ``{\tt metafont@ens.fr}''
-(at the notorious Ecole Normale Superieure de~Paris).
-Owner of the list is Jacques {\sc Beigbeder}
-(``{\tt beig@ens.fr}''),
-coordinator is Yannis {\sc Haralambous}
-(``{\tt yannis@gat.citilille.fr}'').
-Language of the list is English;
-intelligent mottos are encouraged.
-
-
-\section{Conclusion}
-
-\MF{}, like \TeX{} and many another `portable' program of any
-complexity, merits the warning: `{\em Watch out for the first step\/}'.
-
-I hope that a document like this may help to prevent domestic
-accidents involving \MF{}, and so contribute to making the task
-of using and designing meta-fonts an enjoyable one. My brief
-experience with \MF{} suggests that it can be so.
-
-
-All the Best!
-%% Geoffrey Tobin
-
-\end{document}
-% end file mfb3w4.tex %
diff --git a/Master/tlpkg/tlpsrc/metafont-for-beginners.tlpsrc b/Master/tlpkg/tlpsrc/metafont-for-beginners.tlpsrc
deleted file mode 100644
index e69de29bb2d..00000000000
--- a/Master/tlpkg/tlpsrc/metafont-for-beginners.tlpsrc
+++ /dev/null
diff --git a/Master/tlpkg/tlpsrc/scheme-gust.tlpsrc b/Master/tlpkg/tlpsrc/scheme-gust.tlpsrc
index 1b923ba29c1..0d1fc061b24 100644
--- a/Master/tlpkg/tlpsrc/scheme-gust.tlpsrc
+++ b/Master/tlpkg/tlpsrc/scheme-gust.tlpsrc
@@ -17,7 +17,7 @@ depend firststeps
depend gustprog
depend impatient
depend iwona
-depend metafont-for-beginners
+depend metafont-beginners
depend metapost-examples
depend pstricks-tutorial
depend seminar