Re: LSR eyeglasses snippet

[Pierre Perol-Schneider]

Dear All,
Back from holidays ;)...

Here's the story: I created this snippet few month ago when looking for
path drawings examples to do (see the path 'tools' discussion:
http://lilypond.1069038.n5.nabble.com/Introducing-some-path-drawing-tools-td174557.html
).
I knew about the postscript eyeglasses :
http://lilypond.org/doc/v2.18/Documentation/notation/graphic but not about
the implemented one, which is pretty much hidden in the 'other' section:
http://lilypond.org/doc/v2.18/Documentation/notation/other.html
When I discovered its existence, I've mentioned it in the snippet saying
that this one has absolute coordinates.
I've chosen to keep this snippet since I want to use it in a future path
drawing article for the blog.

@Harm: snippet updated to follow core eyeglasses dimensions.

Cheers,
Pierre

2015-08-11 23:08 GMT+02:00 Thomas Morley <address@hidden>:

> 2015-08-11 15:57 GMT+02:00 Phil Holmes <address@hidden>:
> > ----- Original Message ----- From: "David Kastrup" <address@hidden>
> > To: "Phil Holmes" <address@hidden>
> > Cc: <address@hidden>
> > Sent: Tuesday, August 11, 2015 2:39 PM
> > Subject: Re: LSR eyeglasses snippet
> >
> >
> >> Phil Holmes <address@hidden> writes:
> >>
> >>> I don't understand why this snippet is present: can anyone explain?
> >>>
> >>> http://lsr.di.unimi.it/LSR/Item?id=982
> >>
> >>
> >> It was implemented in LilyPond's core in 2.13.0 with
> >>
> >> commit 243b15925ff3ef8b0384ffd0a6ce6664ad19da99
> >> Author: Reinhold Kainhofer <address@hidden>
> >> Date:   Fri Jan 30 21:30:24 2009 +0100
> >>
> >>    Implement \eyeglasses as markup command
> >>
> >>    -) implement \eyeglasses as markup command, using the postscript
> stored
> >>       in the eyeglassesps variable
> >>    -) Use this markup command in musicxml2ly, too
> >>    -) Add regtest for \eyeglasses (in a \markup and as a markup attached
> >> to
> >>       a note)
> >>    -) Remove the eyeglasses example from the postscript command and
> >>       replace it by two rings (the stereo symbol) written in postscript
> >>
> >> and presumably the snippet predates this?
> >>
> >> --
> >> David Kastrup
> >
> >
> >
> > No - it postdates it considerably.  It would seem that it re-implements
> the
> > \eyeglasses command, but with absolute rather than relative
> co-ordinates.  I
> > don't understand why this might be beneficial.
> >
> > --
> > Phil Holmes
>
>
>
> The difference between the two is visible, when you let draw a box
> around both, see attachment.
> I've no clue about the benefit either, though.
>
> Maybe Pierre can say something about it since he did the last LSR-update.
> cc-ed him.
>
> Cheers,
>   Harm
>