Dear fellows: Inspired by the script created for flamenco music I
began to design some symbols which are specific for a cuatro in
Venezuela and other parts of the world.
At any rate, the main difficulty Im experiencing right now is the fact
that no matter how good, or scaled or proportioned I put a graphic, it
just gets repeated twice in the output.
Let me explain.
1. Originally, the guy that created the flamenco example, used very
simple PS commands to draw, again, a very simple shape of an arrow. To
insert them, you just need this kind of construct:
golpe = \markup { \postscript #"
0.2 setlinewidth
0 0 moveto
1 0 lineto
1 1 lineto
stroke
2. This, however nice, is not sufficient for my purposes. Since I need
better arrows I decided to install a complete function for creating
several kinds of arrows by using PS command exclusively. Now, the
place to use this arrows is probably in the title section, so I put
them in my file like this:
\header {
tagline = ##f
title = "Viajera del Río"
subtitle = "Vals Venezolano"
composer = \markup {
\column \roman \right-align {"Manuel YÁNEZ"
\lower #2 \tiny "Transcrito por Jesús G. Andrade."
\lower #1 \tiny "Conservatorio Vicente E. Sojo."
\vspace #1
}
}
meter = \markup {\strokeUp \strokeUp \strokeDown \strokeDown
\strokeUp}
}
3. As you can see, I redefined the strokeUp and Down just for testing
purposes and used it within the \meter environment for the nice
placement in regard of the page and the score. The said PS function
gets interpreted well with GS, however, they get repeated and lilypond
inserts a full empty page with it. I tried to simplify it to the
extreme, but is seems lilypond gets confused with the context of the
ps function. This is the full example of the function to draw an arrow
as I want:
% Finger stroke symbols
strokeUp = \markup { \postscript #"
/arrowdict 14 dict def
arrowdict begin
/mtrx matrix def
end
/arrow
{arrowdict begin
/headlength exch def
/halfheadthick exch 2 div def
/halfthick 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 halfthick neg moveto
base halfthick neg lineto
base halfheadthick neg lineto
arrowlength 0 lineto
base halfheadthick lineto
base halfthick lineto
0 halfthick lineto
closepath
savematrix setmatrix
end
} def
newpath
4 3 4 .9 .9 2 2 .2 sqrt mul 2 div
arrow .65 setgray fill
showpage
Any clues as to what can I do to get rid of this erroneous behaviour?
I appreciate your patience.
Guillermo
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