Hello,
I have interesting task. I want to build a picture of a guitar chord
using metapost.
For now, I only knew how to make a chord grid:
\startreusableMPgraphic{chordgrid}
drawoptions(withpen pencircle scaled 0.4pt withcolor black) ;
draw hlingrid(0, 5, 1, 0.8cm, 1cm) ;
draw vlingrid(0, 4, 1, 1cm, 0.8cm) ;
\stopreusableMPgraphic
\define[0]\ChGrid{\dontleavehmode\useMPgraphic{chordgrid}\hskip2mm}
\starttext
\ChGrid
\stoptext
I need to change it so that I could specify fret numbers, i.e. six
numbers for each string, and draw a filled circles in these positions.
I've started with a command like this
\define[6]\Ch{\dontleavehmode\useMPgraphic{chordgrid}...
I'm not sure what to do next... How to pass these parameters into MP,
how to organize the loop...
For a test, \Ch[1][3][1][2][1][1] should produce
|-O-|---|---|---|
|-O-|---|---|---|
|---|-O-|---|---|
|-O-|---|---|---|
|---|---|-O-|---|
|-O-|---|---|---|
Please, help me with it.
--
Best Regards,
Vyatcheslav Yatskovsky
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