mf/feta-slag.mf

   1 % -*- Fundamental -*-  (emacs-20 mf mode mucks
   2 % feta-slag.mf --  implement trill symbols
   3 %
   4 % source file of the Feta (defintively not an abbreviation for Font-En-Tja)
   5 % music font
   6 %
   7 % (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
   8 %
   9
  10 % this file is included by feta-scripts.mf
  11
  12 trill_thin# = 0.1 staff_space# + 0.6 stafflinethickness#;
  13 trill_thick# = 1/2 staff_space#;
  14 trill_width# = 5/12 staff_space#;
  15 trill_height# = 1/2staff_space#;
  16 trill_overlap# = 1/6 staff_space#;
  17
  18 pair trill_ne;
  19 trill_ne := unitvector ((6,9));
  20
  21 define_pixels (trill_thick, trill_thin,
  22                 trill_width, trill_overlap, trill_height);
  23
  24
  25 %
  26 % the trill element sticks out on both the left and right side
  27 % out of the normal bbox, so you can glue them together easily.
  28 %
  29 def draw_trillelement (expr startx) =
  30 begingroup
  31         clearxy;
  32         save x, y, p;
  33
  34         pickup pencircle scaled trill_thin;
  35
  36         x1 = - trill_width;
  37         y1 = 0;
  38         z3 = whatever * trill_ne + z1;
  39         top y3 = trill_height;
  40         z2 =  z3 - (trill_thick - trill_thin) * trill_ne;
  41
  42         z4 = z1 - trill_ne * trill_overlap;
  43
  44         path p;
  45         p = z3 -- z2 -- z4 -- z2;
  46         p := p -- (p scaled -1) -- cycle;
  47         %pickup pencircle scaled 2;
  48         filldraw (p shifted (startx + trill_width,0)) ;
  49         %draw p;
  50         labels(1,2,3,4);
  51 endgroup;
  52 enddef;
  53
  54
  55
  56
  57 fet_beginchar("trilelement", "trilelement", "trilelement")
  58         set_char_box(trill_width#, trill_width#,
  59                                 trill_height#, trill_height#);
  60         draw_trillelement(-trill_width);
  61 fet_endchar;
  62
  63 fet_beginchar("prall", "prall", "prall")
  64         set_char_box(2 trill_width#, 2 trill_width#,
  65                      trill_height#, trill_height#);
  66         draw_trillelement(-2 trill_width);
  67         draw_trillelement(0);
  68 fet_endchar;
  69
  70 fet_beginchar("mordent", "mordent", "mordent")
  71         set_char_box(2 trill_width#, 2 trill_width#,
  72                         4/3 trill_height#, 4/3 trill_height#);
  73         draw_trillelement(-2 trill_width);
  74         draw_trillelement(0);
  75
  76         pickup pencircle scaled trill_thin;
  77         top y1 = h;
  78         bot y2 = -d;
  79         x1 = x2 ;
  80         x2 = 0;
  81         draw z1 -- z2;
  82 fet_endchar;
  83
  84 fet_beginchar("prallprall", "prallprall", "prallprall")
  85         set_char_box(3 trill_width#, 3 trill_width#,
  86                      trill_height#, trill_height#);
  87         draw_trillelement(-3 trill_width);
  88         draw_trillelement(-1 trill_width);
  89         draw_trillelement(1 trill_width);
  90 fet_endchar;
  91
  92 fet_beginchar("prallmordent", "prallmordent", "prallmordent")
  93
  94         set_char_box(3 trill_width#, 3 trill_width#,
  95                      4/3 trill_height#, 4/3trill_height#);
  96         draw_trillelement(-3 trill_width);
  97         draw_trillelement(-1 trill_width);
  98         draw_trillelement(1 trill_width);
  99
 100         pickup pencircle scaled trill_thin;
 101         top y1 = h;
 102         bot y2 = -d;
 103         x1 = x2 ;
 104         x2 = trill_width;
 105         draw z1 -- z2;
 106 fet_endchar;
 107
 108 save remember_pic;
 109 picture remember_pic;
 110
 111 fet_beginchar("upprall", "upprall", "upprall")
 112         set_char_box(3 trill_width#, 3 trill_width#,
 113                       trill_height#, trill_height#);
 114         draw_trillelement(-3 trill_width);
 115         draw_trillelement(-1 trill_width);
 116         draw_trillelement(1 trill_width);
 117
 118
 119         z1 = (- b,0) - trill_overlap * trill_ne ;
 120         z4 = z1 + (0, - 2 trill_height);
 121         labels (1,4);
 122         draw z1{-trill_ne} .. z4{trill_ne yscaled  -1};
 123         remember_pic := currentpicture ;
 124 fet_endchar;
 125
 126 fet_beginchar("upmordent", "upmordent", "upmordent")
 127         set_char_box(3 trill_width#, 3 trill_width#,
 128                       4/3 trill_height#, 4/3 trill_height#);
 129
 130         currentpicture := remember_pic;
 131
 132         pickup pencircle scaled trill_thin;
 133         top y1 = h;
 134         bot y2 = -d;
 135         x1 = x2 ;
 136         x2 = trill_width;
 137         draw z1 -- z2;
 138 fet_endchar;
 139
 140 fet_beginchar("pralldown", "pralldown", "pralldown")
 141         set_char_box(3 trill_width#, 3 trill_width#,
 142                       trill_height#, trill_height#);
 143         currentpicture := remember_pic xscaled -1;
 144 fet_endchar;
 145
 146 fet_beginchar("downprall", "downprall", "downprall")
 147         set_char_box(3 trill_width#, 3 trill_width#,
 148                       trill_height#, trill_height#);
 149         remember_pic := currentpicture;
 150         draw_trillelement(-3 trill_width);
 151         draw_trillelement(-1 trill_width);
 152         draw_trillelement(1 trill_width);
 153
 154
 155         z1 = (- b,0) - trill_overlap * trill_ne ;
 156         z4 = z1 + (0, 2 trill_height);
 157         labels (1,4);
 158         draw z1{trill_ne xscaled -1} .. z4{trill_ne};
 159         remember_pic := currentpicture ;
 160
 161 fet_endchar;
 162
 163 fet_beginchar("downmordent", "downmordent", "downmordent")
 164         set_char_box(3 trill_width#, 3 trill_width#,
 165                     4/3  trill_height#, 4/3trill_height#);
 166
 167         currentpicture := remember_pic;
 168
 169         pickup pencircle scaled trill_thin;
 170         top y1 = h;
 171         bot y2 = -d;
 172         x1 = x2 ;
 173         x2 = trill_width;
 174         draw z1 -- z2;
 175 fet_endchar;
 176
 177 fet_beginchar("prallup", "prallup", "prallup")
 178         set_char_box(3 trill_width#, 3 trill_width#,
 179                       trill_height#, trill_height#);
 180         currentpicture := remember_pic xscaled -1;
 181 fet_endchar;
 182
 183
 184 fet_beginchar("lineprall", "lineprall", "lineprall")
 185         set_char_box(3 trill_width#, 3 trill_width#,
 186                       trill_height#, 4trill_height#);
 187         remember_pic := currentpicture;
 188         draw_trillelement(-3 trill_width);
 189         draw_trillelement(-1 trill_width);
 190         draw_trillelement(1 trill_width);
 191
 192
 193         z1 = (- b,0) - trill_overlap * trill_ne ;
 194         z4 = z1 + (0, h);
 195         labels (1,4);
 196         draw z1 -- z4;
 197 fet_endchar;
 198
 199