Re: Wrong glissando for notes with duration longa

[David Kastrup]

Thomas Morley <address@hidden> writes:

> 2017-10-03 18:18 GMT+02:00 David Kastrup <address@hidden>:
>> Thomas Morley <address@hidden> writes:
>>
>>> Version: 2.16.2: longa-note-head-stencil Y-extent: (-0.550006 . 0.550006)
>>> Version: 2.19.65: longa-note-head-stencil Y-extent: (-0.72 . 3.519982)
>>>
>>> It's caused by:
>>>
>>> commit f494ef0afc8aed378bd778cd51a294804a8ee5d4
>>> Author: Phil Holmes <address@hidden>
>>> Date:   Mon Jul 29 16:09:29 2013 +0100
>>>
>>>     Corrects bounding box for longa (Issue 826)
>>>
>>> related is:
>>>
>>> commit b27354f5fd0df898310a354c4031c2c701ecebaa
>>> Author: Phil Holmes <address@hidden>
>>> Date:   Mon Jul 29 15:21:46 2013 +0100
>>>
>>>     Fixes bounding boxes for breves, improves longas (Issue 3480)
>>>
>>> Those patches tackle the skyline-problem, which causes the cut off previews.
>>> So it's no good option to revert them.
>>>
>>> Maybe glissando should look at staff-position?
>>
>> That sounds sensible.
>
> Thinking more about it I'm not longer convinced it would be the best
> fix.

Interesting.

> We have other glyphs exceeding their bounding-box, like the forte-sign, see:
> \markup \box \musicglyph #"f"

They don't feature in glissando end point positioning, do they?

> But the skylines are done properly:
> #(ly:set-option 'debug-skylines #t)
> { c'1_\f }
>
> Though, not for mensural-glyphs:
> #(ly:set-option 'debug-skylines #t)
> \new MensuralStaff { \stemDown c'\longa_\f c' }
>
> So I tend to get the skyline-code improved to deal properly with
> default-longas and similar mensural-glyphs as is done for the
> forte-sign.
>
> Not that I'd have an idea how to do...

I don't really see the connection to glissandi here.  Isn't that more of
an independent problem?

-- 
David Kastrup