Re: ambitus: special handling of small ambits' lines (issue4609041)

[Trevor Daniels]

Janek Warchoł wrote Monday, June 13, 2011 2:51 PM

> 2011/6/13  <address@hidden>:

> > a) It would be better to honour the value of 'gap if this
> > is set by the user, rather than change a specifically
> > requested gap value.
>
> My rationale is that it wouldn't make sense to set a big gap and
> really want to have it applied to all ambituses. Consider the
> following:
>
> \new Staff \with { \consists Ambitus_engraver } {
>    \override Staff.AmbitusLine #'gap = #0.7
>    c' g'
> }
...
> \new Staff \with { \consists Ambitus_engraver } {
>    \override Staff.AmbitusLine #'gap = #0.7
>    a a''
> }
>
> While gap=0.7 works fine for big ambituses (one can easily imagine
> that a user may wish such a value), the ambitus of sixth looks
> ridiculous without any line inside. I suppose that if someone 
> would
> like that "look", he would probably switch the line off entirely.
> And for small gap the effect is almost unnoticeable.

Your algorithm is fine as the default behaviour, but it does remove 
the
ability for a user to precisely set the gap he wants by setting 
'gap,
for whatever reason.  This seems counter to Lily's flexible user 
control,
but I don't feel too strongly about it.  If this is implemented the 
description
of 'gap will have to be changed to explain this.

> > b) I don't understand why quanting is desired. An ambitus
> > doesn't align with anything. What is your reason?
>
> I thought that it's best if ambitus line eihter ends precisely 
> inside
> staff line, or protrudes from it distinctly. In other words, i 
> judged
> that
> \new Staff \with { \consists "Ambitus_engraver" }
>    { \override Staff.AmbitusLine #'gap = #0.3 c' b' }
> doesn't look nice.
> Ofc i'm aware that this is perhaps as nitpicky as it can go :D

OK.  It is! :)   Does it scale correctly with large and small values 
of
global staff-size?

Trevor