Re: Proposal: Changing tremolo beam gap implementation

[Thomas Morley]

Am Fr., 27. März 2020 um 20:45 Uhr schrieb Thomas Morley
<address@hidden>:
>
> Am Fr., 27. März 2020 um 18:35 Uhr schrieb Torsten Hämmerle
> <address@hidden>:
> >
> > Hello all,
> >
> > Looking more deeply into Harm's strange whole-note tremolo beam gap
> > behaviour, I've stumbled over the current gap implementation:
> >
> > It's probably rather academic, but my understanding of "gap size" is the
> > actual gap size (white space) between two objects.
> >
> > Looking at the current implementation and playing around with stem
> > thickness, however, it becomes obvious that the gap is, other than expected,
> > not the free space between stem and beam:  It it is measured from the outer
> > side of the stems and not from the inner side of the stems.
> >
> > The following illustration will compare the current behaviour to what I
> > would expect, varying the beam thicknesses from 0 via standard up to
> > exaggerated values in order to make the effect clearly visible:
> >
> > <http://lilypond.1069038.n5.nabble.com/file/t3887/tremolo-gap-comp.png>
> >
> > *What do you think?*
> > Wouldn't it be better to have "gap" actually mean "free space"?
> > Before opening an issue and uploading a patch, I'd rather ask for opinions.
> >
> > Thanks in advance,
> > Torsten
> >
> > tremolo-gap-comp.png
> > <http://lilypond.1069038.n5.nabble.com/file/t3887/tremolo-gap-comp.png>
>
> Hi Torsten,
>
> for whole-note-tremolo there is taken care for not colliding with
> left/right NoteHeads, even for 'gap = 0
> If 'gap <= 2 then there is white space added, exactly as specified
> (half of gap-size to left/right), measured from NoteHeads to Beam.
>
> (1) Why should it be different if 'gap is greater than 2.0?
> (2) Why should it be different for other note-durations?
>
> Thus I think 'gap should always specify the _white_ space.
>
>
> Btw, I stumbled across it while trying to code a custom-function
> attempting to make whole-note-tremolo-beams avoid possible Dots to the
> left and possible Accidentals to the right.
>
> Any chance for a fix, while you're on it?
>
>
> Many thanks,
>   Harm
>
> P.S. I crossposted to devel, not all are subscribed to the user-list