Re: No blot in custom bar line

[Simon Albrecht]

On 23.11.2015 23:02, David Nalesnik wrote:
> Hi Simon,
>
> On Mon, Nov 23, 2015 at 3:40 PM, Simon Albrecht 
> <address@hidden <mailto:address@hidden>> wrote:
>
>     Hello,
>
>     I’ve defined a custom bar line, following the examples in
>     scm/bar-line.scm. Now I would have expected the whole ‘blot’
>     business to give me round edges, at least with \override
>     Staff.BarLine.rounded = ##t, but it doesn’t. Why?
>
> The value for blot that you end up using is tiny.  (I get a value of 
> 0.016.)  Try substituting 0.08 for a better appearance.  I'm not sure 
> at the moment how you'd go about *calculating* a more reasonable value.

After quite some scouring I found the source for this small value: 
scm/paper.scm, lines 91f. read:
    ;;  sync with feta
    (setm! 'blot-diameter (* 0.4 pt))
It works to just replace (layout-blot-diameter grob) in the definition 
for calc-blot by 0.1. Thus, there’s still the safety that a smaller 
value will be chosen for either very thin or very short bar-lines – 
OTOH, when is that supposed to happen? :-)

Yours, Simon