Hi, group,
I've become a big fan of asciidoc and use it whenever I can.
I've spent some time looking through the FAQs, poking through the full
User's Guide, PowerMan's excellent cheat sheet, and various other
explanatory pages on the AsciiDoc project website. Possibly due to my
unfamiliarity with the terms "backends", "filters", "macros" and "pass-
thru blocks" I have been unable to come up with an easy way to have
one equation markup generate properly in both HTML and PDF output
formats.
I use a Makefile to generate chunked HTML and PDF; it contains two
invocations of a2x with custom attributes "formatpdf" or "formathtml"
which I use inside the source file. (I do this instead of checking the
"backend" version since a2x doesn't seem to define a "backend"?)
make: Orbit.pdf Orbit.html
Orbit.pdf: Orbit.txt ${IMAGES}
a2x -vf pdf -d article -a formatpdf Orbit.txt
Orbit.html: Orbit.txt ${IMAGES}
a2x -vf xhtml -a latex -a formathtml Orbit.txt
and the source document Orbit.txt contains, for example,
To split the acceleration into two dimensions (X and Y) we can use the
fact that the portion of force in either dimension is proportional to
the ratio of distance in that dimension to total distance:
// PDF version
ifdef::formatpdf[]
[latexmath]
++++++
\[\frac{F_x}{F} = \frac{R_x}{R}\]
\[F_x = \frac{R_x F}{R}\]
++++++
endif::formatpdf[]
// HTML version
ifndef::formatpdf[]
["latex","ex3_2a.png",{eqndpi}]
$\frac{F_x}{F} = \frac{R_x}{R}$
["latex","ex3_2b.png",{eqndpi}]
$F_x = \frac{R_x F}{R}$
endif::formatpdf[]
Surely there is a simpler way that lets me use one latex markup style
but supports both soft and hardcopy output formats. Also, is there
some way the source document can know at processing time which output
it is intended for, if a2x is used instead of asciidoc? (I don't
really understand why there exist both asciidoc and a2x; they seem to
do the same thing but have different command syntaxes).
Thanks from a n00b.
-- Bruce Jackson
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