ly/params.ly

   1 % params.ly
   2 % generic paper parameters
   3
   4 %{
   5
   6 TODO:
   7
   8 * cleanup
   9 * use elt properties, iso. paper variables.
  10 %}
  11
  12
  13
  14 paperfile = \papersize + ".ly";
  15 % paperfile = "a4.ly";
  16 \include \paperfile;
  17 \include "paper.ly";
  18
  19 staffspace = \staffheight / 4.0;
  20 stafflinethickness = \staffspace / 10.0;
  21
  22 % deprecated
  23 interline = \staffspace;
  24
  25
  26 % urg, need grace_ versions of these too?
  27 beam_thickness = 0.52 * (\staffspace - \stafflinethickness);
  28
  29
  30
  31 interbeam = (2.0 * \staffspace + \stafflinethickness - \beam_thickness) / 2.0;
  32 interbeam4 = (3.0 * \staffspace - \beam_thickness) / 3.0;
  33
  34 %{
  35 The space taken by a note is determined by the formula
  36
  37    SPACE = arithmetic_multiplier * ( C + log2 (TIME) ))
  38
  39 where TIME is the amount of time a note occupies.  The value of C is
  40 chosen such that the smallest space within a measure is
  41 arithmetic_basicspace:
  42
  43   C = arithmetic_basicspace - log2 (mininum (SHORTEST, 1/8))
  44
  45 The smallest space is the one following the shortest note in the
  46 measure, or the space following a hypothetical 1/8 note.  Typically
  47 arithmetic_basicspace is set to a value so that the shortest note
  48 takes about two noteheads of space (ie, is followed by a notehead of
  49 space):
  50
  51    2*quartwidth = arithmetic_multiplier * ( C + log2 (SHORTEST) ))
  52
  53    { using: C = arithmetic_basicspace - log2 (mininum (SHORTEST, 1/8)) }
  54    { assuming: SHORTEST <= 1/8 }
  55
  56                = arithmetic_multiplier *
  57                ( arithmetic_basicspace - log2 (SHORTEST) + log2 (SHORTEST) )
  58
  59                = arithmetic_multiplier * arithmetic_basicspace
  60
  61    { choose: arithmetic_multiplier = 1.0*quartwidth (why?)}
  62
  63                = quartwidth * arithmetic_basicspace
  64
  65    =>
  66
  67    arithmetic_basicspace = 2/1 = 2
  68
  69 If you want to space your music wider, use something like:
  70
  71    arithmetic_basicspace = 4.;
  72
  73 %}
  74 % We use 0.9*\quartwidth, because 1.0 seems to wide.
  75 % We don't adjust arithmetic_basicspace accordingly (why not?)
  76 arithmetic_multiplier = 0.9 * \quartwidth ;
  77 arithmetic_basicspace = 2.0;
  78
  79
  80 %
  81 % UGH; junk these!
  82 %
  83
  84 % catch suspect beam slopes, set slope to zero if
  85 % outer stem is lengthened more than
  86 beam_lengthened = 0.2 * \staffspace;
  87 % and slope is running away steeper than
  88 beam_steep_slope = 0.2 / 1.0;
  89
  90
  91
  92 %{
  93   Slur parameters.
  94
  95   See Documentation/programmer/fonts.doc
  96 %}
  97 % Height-limit (h_inf) = factor * staff_space
  98 slur_height_limit_factor = 2.0;
  99 slur_ratio = 1.0 / 3.0;
 100
 101 slur_thickness = 1.2 * \stafflinethickness;
 102
 103 slur_force_blowfit = 0.5;
 104 slur_beautiful = 0.5;
 105
 106
 107 %{
 108 Horizontal space between centre of notehead and slur.
 109 %}
 110 % OSU: suggested gap = ss / 5;
 111 slur_x_gap = \staffspace / 5.0;
 112 slur_y_gap = 0.25 * \staffspace;
 113 slur_y_free = 0.75 * \staffspace;
 114 slur_x_minimum = 1.5 * \staffspace;
 115
 116
 117 % The constants that define the valid areas for the middle control points
 118 % Used in de_uglyfy.  Bit empirical.
 119 bezier_control1 = 1.5;
 120 bezier_control2 = 0.8;
 121 bezier_control3 = -2.0;
 122
 123 % URG: the magic constants for area asymmetry
 124 bezier_pct_c0 = -0.2;
 125 bezier_pct_c3 = 0.000006;
 126 bezier_pct_out_max = 0.8;
 127 bezier_pct_in_max = 1.2;
 128 bezier_area_steps = 1.0;
 129
 130
 131 %{
 132   Tie parameters
 133 %}
 134
 135 tie_height_limit_factor = \slur_height_limit_factor;
 136 tie_ratio = \slur_ratio;
 137 tie_thickness = \slur_thickness;
 138
 139 tie_x_minimum = \staffspace + \slur_x_minimum;
 140 % OSU: tie gap == slur gap
 141 tie_x_gap = \slur_x_gap;
 142 tie_y_gap = 0.25 * \staffspace;
 143 % length of a tie that's a staffspace high
 144 tie_staffspace_length = 4.0 * \staffspace;
 145
 146 tie_staffline_clearance = 2.0 *\tie_thickness;
 147
 148
 149
 150
 151 % ugh
 152 notewidth = (\quartwidth + \wholewidth) / 2.0;
 153
 154 gourlay_energybound = 100000.;
 155 %{
 156 Maximum number of measures per line to try when using Gourlay
 157 method.
 158 %}
 159 gourlay_maxmeasures = 10.;
 160
 161 % vertical space between lines.
 162 line_kern = \staffspace;
 163
 164 volta_thick = 1.6*\stafflinethickness;
 165 volta_spanner_height = 2.0 *\staffspace;
 166
 167 % relative thickness of thin lines  1.6 : 1 : 0.8
 168 stemthickness = 0.8*\stafflinethickness;
 169 rulethickness = \stafflinethickness;
 170
 171
 172 extender_height = 0.8*\stafflinethickness;
 173
 174
 175 % Multi-measure rests
 176 multi_measure_rest_x_minimum = 2.5*\staffheight;
 177 multi_measure_rest_padding = 2.0 *\staffspace;
 178 multi_measure_rest_expand_limit = 10.0;
 179
 180 % chop off this much when next to pp / ff sign.
 181 crescendo_shorten = 4.0 * \staffspace;
 182 crescendo_thickness   = \stafflinethickness;
 183 crescendo_height = 0.666 * \staffspace;
 184 crescendo_dash_thickness = 1.2*\stafflinethickness;
 185 crescendo_dash = 4.0*\staffspace;
 186
 187 % in internote.
 188
 189
 190 % unit for note collision resolving
 191 collision_note_width = \notewidth;      %ugh.
 192
 193 % optical correction amount.
 194 stemSpacingCorrection = 0.5*\staffspace;
 195
 196
 197 %{
 198  relative strength of space following breakable columns (eg. prefatory matter)
 199  %}
 200 breakable_column_space_strength = 2.0;
 201
 202 % space after inline clefs and such get this much stretched
 203 decrease_nonmus_spacing_factor = 1.0 ;
 204
 205 %{
 206  space before musical columns (eg. taken by accidentals) get this much
 207  stretched when they follow a musical column, in absence of grace notes.
 208
 209  0.0 means no extra space (accidentals are ignored)
 210 %}
 211 musical_to_musical_left_spacing_factor = 0.4;
 212
 213 %{
 214  stretch space this much if there are grace notes before the column
 215 %}
 216 before_grace_spacing_factor = 1.2;
 217
 218 %{
 219 If columns do not have spacing information set, set it to this much
 220 %}
 221 loose_column_distance = 2.0 * \staffspace;
 222
 223 %{
 224 Relative cost of compressing (vs. stretching).  Increasing this
 225 will cause scores to be set looser
 226 .
 227 %}
 228
 229 compression_energy_factor = 0.6;
 230
 231 % if stem is on middle line, choose this direction.
 232 stem_default_neutral_direction = 1.0;
 233
 234 % in staffspace
 235 articulation_script_padding_default = 1.0;
 236
 237
 238 \include "engraver.ly";
 239
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