%  this is musexgen.mf

% Here are two types of pianobrackets available, they are absolute compatible,
% so choose this one you prefer (search for '%!!!')

path p;
picture save_pic;

pen thin_pen, med_pen;
thin_pen:= pencircle scaled max(1,.2pt+blacker);
med_pen:= pencircle scaled med;

%%%%%%%
message ("<big braces>");
%%%%%%%

firstbrace:=20;  % smallest brace is 2*20 pt (\simeq 14mm)
lastbrace:=67;   % largest brace is 2*67 pt (\simeq 47mm)

%%% from Stanislav Kneifl

def drawpianobracket (expr height) =
  u# := 1nhh#/5pt# * 1pt#;
  v# := (height/40) * 1pt#;
  define_pixels (u, v);
%  beginchar (height-firstbrace, 1.25nhh#, 0, 0);
  beginchar (height-firstbrace, 0, 0, 0);
    z1 = origin;
    z2 = (4.7u, 7v);
    z3 = (3.6u, 16.5v);
    z4 = (1.9u, 25v);
    z5 = (2.28u, 32v);
    z6 = (w, 40v);
    penpos1 (max(1,0.1u), 125);
    penpos2 (1.2u, 180);
    penpos3 (3.2u, 195);
    penpos4 (2.5u, 180);
    penpos5 (1.14u, 180);
    penpos6 (max(2,0.3u), 150);
    penstroke z1e{dir 35}..z2e..z3e..z4e..z5e..{dir 60}z6e;
    currenttransform := identity reflectedabout ((0,0),(1,0));
    penstroke z1e{dir 35}..z2e..z3e..z4e..z5e..{dir 60}z6e;
    currenttransform := identity;
% inserted
    currentpicture:=currentpicture shifted (round(-1.75nhh), 0);
%
  endchar;
enddef;

def bigbrace(expr v) =
  beginchar (v-firstbrace, 0, 0, 0);
  " brace vsize "&decimal round(2v*pt#)&"pt";
    vwidth:=v*pt;
    hwidth:=max(.1vwidth,3.25pt);
    hwidth:=min(hwidth,6.5pt);
    actwidth:=.035vwidth;
    x1=.25nhw;  y1=vwidth;
    x2l=-.8hwidth; y2=2/3vwidth;
    x3r=.2hwidth; y3=1/3vwidth;
    x4=-hwidth; y4=0;
    penpos1(max(1,.25pt),-35);
    penpos2(1.5med+actwidth,40);
    penpos3(1.75med+actwidth,45);
    penpos4(max(1,.2pt),-90);
    penstroke z1e..z2e..z3e..{left+sw}z4e;
    currentpen:= pencircle; draw z1..z2..z3..{left+sw}z4;
    addto currentpicture also currentpicture reflectedabout (origin, right);
    penlabels(1,2,3,4);
    currentpicture:= currentpicture shifted (round(-.75nhh), 0);
  endchar;
enddef;

%!!! comment the line 'bigbrace' and uncomment the line 'drawpianobracket'
%    or leave it like it is !!!

for v=firstbrace upto lastbrace :
    bigbrace (v);
%    drawpianobracket (v);
endfor;

%%%%%%%
message ("<glissandi-elements>");
%%%%%%%
%  glissando{slide} (slope [degree])

def glissando (expr theta)=
  x1=-1; y1=0; z2=z1+(.5nhw,0); z3=z1+(nhw+1,0);
  p:= z1{1.25up+right}..{1.25down+right}z2{1.25down+right}..{1.25up+right}z3;
  pickup penrazor scaled (.075nhw+thick) rotated (theta+65);
  draw p rotated theta;
  labels (1,2,3);
enddef;

for slope=1 upto 8:

  beginchar(56+slope-1, (cosd(10slope))*nhw#,(sind(10slope))*nhw#, 0);
  " glissando element slope "&decimal (10slope)&" degree";
    glissando (10slope);
    save_pic:= currentpicture;
  endchar;

  beginchar(64+slope-1, (cosd(10slope))*nhw#, (sind(10slope))*nhw#, 0);
  " glissando element slope "&decimal (-10slope)&" degree";
    currentpicture:= save_pic reflectedabout (origin, right);
  endchar;

endfor;

%%%%%%%
message ("<guitar chords>");
%%%%%%%
def tabulatur (expr nd)=
  hwidth:=1/5w;
  x1=x2=y2=y3=0; x3=w; y1=-nd;
  fill unitsquare xscaled (w+2thinwidth) yscaled (med+.2pt)
       shifted(-thinwidth,0);
  pickup thin_pen;
  for v=1 upto 5 :
    draw (z2--z3) shifted (0,v*-hwidth);
  endfor;

  for v=0 upto 5 :
    draw (z1--z2) shifted (v*hwidth,0);
  endfor;
  labels (1,2,3);
enddef;

%beginchar(72, 15/4nhw#, 0, 0);" grid";
%  tabulatur (54/10nhh);
%endchar;

%beginchar(73, 15/8nhw#, 0, 0); " dot";
%  fill fullcircle scaled .675nhh shifted (w,-.45nhh);
%endchar;

%beginchar(74, 15/4nhw#, 0, 0); " bar";
%  fill unitsquare xscaled w yscaled .3nhh shifted (0,-.6nhh);
%endchar;

shift:=.15nhh;
def Circle (expr nh)=
  x1l=.1w; x2=x4=.5w; x3l=.9w;
  y1=y3=.5nh+shift; y2=.1nh+shift; y4=.9nh+shift;
  penpos1(med, 0);
  penpos2(thinwidth,90);
  penpos3(med,180);
  penpos4(thinwidth, 270);
  penstroke z1e..z2e..z3e..z4e..cycle;
  pickup pencircle; draw z1..z2..z3..z4..cycle;
enddef;

%beginchar(75, 3/4nhw#, 0, 0); " circle";
%  Circle (.9nhh);
%endchar;

def Cross (expr nh)=
  x1=x3=.2w; x2=x4=.8w;
  y1=y4=.2nh+shift; y2=y3=nh-.2nh+shift;
  pickup med_pen;
  draw z1--z2; draw z3--z4;
% labels (1,2,3,4);
enddef;

%beginchar(76, 3/4nhw#, 0, 0); " cross";
%  Cross (.9nhh);
%endchar;

%beginchar(77, 3/4nhw#, 0, 0); " blank";
%endchar;

beginchar(72, 3nhw#, 0, 0);" small grid";
  tabulatur (108/25nhh);
endchar;

beginchar(73, 3/2nhw#, 0, 0); " small dot";
  fill fullcircle scaled .54nhh shifted (w,-.36nhh);
endchar;

beginchar(74, 3nhw#, 0, 0); " small bar";
  fill unitsquare xscaled w yscaled .24nhh shifted (0,-.48nhh);
endchar;

beginchar(75, 3/5nhw#, 0, 0); " small circle";
  Circle (.72nhh);
endchar;

beginchar(76, 3/5nhw#, 0, 0); " small cross";
  Cross (.72nhh);
endchar;

% the next seems to be senseless, but it isn't

beginchar(77, 3/5nhw#, 0, 0); " small blank";
endchar;