On Fri, Mar 13, 2015 at 9:27 PM, David Nalesnik <david.nales...@gmail.com> wrote:
> > > On Fri, Mar 13, 2015 at 9:24 PM, David Nalesnik <david.nales...@gmail.com> > wrote: > >> >> >> On Fri, Mar 13, 2015 at 8:31 PM, Andrew Bernard <andrew.bern...@gmail.com >> > wrote: >> >>> Why do I get the feeling nobody is going to answer this? In all >>> seriousness, I don’t know enough about lilypond to know if this is even >>> possible or not, which is a dark state of ignorance. If the Scheme gods >>> could let me know if I am barking up an entirely impossible tree, that may >>> save me from wandering in the wilderness. The archives seem very silent on >>> this topic. >>> >> >> Look for the documentation of the \postscript command to get you started: >> http://lilypond.org/doc/v2.19/Documentation/notation/graphic >> >> David >> > > Oh, oops, I see that you referenced that command. Sorry, don't think I > can be of much help here. > > Spoke too soon: \version "2.19.16" arrowdef = "/arrowdict 14 dict def arrowdict begin /mtrx matrix def end /arrow { arrowdict begin /headlength exch def /halfheadthickness exch 2 div def /halfthickness exch 2 div def /tipy exch def /tipx exch def /taily exch def /tailx exch def /dx tipx tailx sub def /dy tipy taily sub def /arrowlength dx dx mul dy dy mul add sqrt def /angle dy dx atan def /base arrowlength headlength sub def /savematrix mtrx currentmatrix def tailx taily translate angle rotate 0 halfthickness neg moveto base halfthickness neg lineto base halfheadthickness neg lineto arrowlength 0 lineto base halfheadthickness lineto base halfthickness lineto 0 halfthickness lineto closepath savematrix setmatrix end } def" myarrow = #(string-append arrowdef " 0 0 20 4 0.3 1.2 1.2 arrow stroke") { c-\markup { \postscript #myarrow } }
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