Grace notes, accidentals and docu problems ...

[Han-Wen Nienhuys]

address@hidden writes:
> Hi,
> 
> I collected some bugs/features, missing features in lilypond 1.5.x
> Latest version tested: 1.5.47
> 
> Grace notes:
> 1. Grace notes work quite well since 1.5 but I'm missing a feature.
>    Example 1 can not be compiled using lilypond.

try this patch,

--- rhythmic-column-engraver.cc.~1.45.~ Sun Mar 24 21:46:54 2002
+++ rhythmic-column-engraver.cc         Mon Apr  1 21:12:19 2002
@@ -132,15 +132,17 @@
 Rhythmic_column_engraver::acknowledge_grob (Grob_info i)
 {
   Item * item =  dynamic_cast <Item *> (i.grob_l_);
-  if (item && Stem::has_interface (item))
+  if (!item || item->get_parent (X_AXIS))
+    return ;
+  if (Stem::has_interface (item))
     {
       stem_l_ = item;
     }
-  else if (item && Rhythmic_head::has_interface (item))
+  else if (Rhythmic_head::has_interface (item))
     {
       rhead_l_arr_.push (item);
     }
-  else if (item && Dot_column::has_interface (item))
+  else if (Dot_column::has_interface (item))
     {
       dotcol_l_ = item;
     }

together with


\score{
\notes\context Voice{
        \time 6/8
        \clef violin
        \key es \major
        [a'8 ( \context GraceVoice \grace { [bes'16 a'16] }  g'8 )
a'8] d''4 c''8 |
}
\paper { \translator { \VoiceContext
                \accepts GraceVoice
                 }
                  \translator { \VoiceContext \name GraceVoice }
                   linewidth = -1.
    }
}

I'll have a think how to put this into standard lilypond.

> 2. If grace notes are appended first all notes in all voices connected to the
>    same beat as the main note are set before the grace notes start. I have
>    seen an example in literature where the grace notes start as soon as
>    possible after the main note.
> 
>    lilypond:
>    voice 1:      O             <grace notes>
>    voice 2:      o' o' o' o'
> 
>    example:
>    voice 1:      O <grace notes>
>    voice 2:      o' o' o' o'
> 
>    where O is a half note and o' are eight's.

try

  < c1
    { s16 \grace { .. } } >

in stead of

   c1

-- 

Han-Wen Nienhuys   |   address@hidden    | http://www.cs.uu.nl/~hanwen/