I've been (somewhat sporadically) trying to get guitar chord diagrams to
work.
I've figured out how to define a markup using def-markup-command (thanks
for a great feature!).
Now, I want to print a graphic element in the markup. It looks to me
like I should be able to use the (dot x y) function found in
scm/output-tex.scm to create a string that will create an eps dot when
it's evaluated by gsview.
So I wrote the following markup definition:
#(def-markup-command (chord-diagram paper props chord-string) (string?)
"Syntax: \\chord-diagram diagram-string
eg: \\chord-diagram #\"x32010\" to achieve standard C chord"
(interpret-markup paper props (markup (dot 0 0 3)))
)
Hoping to be able to get a dot to come out. Once I can get the dot, I
can also draw the lines and everything else needed to generate the chord
diagram.
But when I try to execute this markup, I get an error message that says
"Unbound variable: dot"
So I have two questions:
1) Is this the correct approach to get dots and lines into a markup? If
not, what's a better approach?
2) If this is the right approach, how do I make use of the functions in
scm/output-tex.scm?
Thanks,
Carl Sorensen
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