[Lilypond-auto] Issue 3445 in lilypond: \retrograde should move the notes to their new location when clef is changed

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Enhancement

New issue 3445 by address@hidden: \retrograde should move the notes to  
their new location when clef is changed
http://code.google.com/p/lilypond/issues/detail?id=3445

Report:
http://lists.gnu.org/archive/html/bug-lilypond/2013-06/msg00082.html

% If a clef is changed in retrograde it only prints the new clef
% It does not move the notes to their new locations on the staff
% All notes here are the same pitch but during clef changes it is printed
% incorrectly

\relative c' {
  c1 % printed correctly
  \retrograde {
    c %printed correctly
    \clef treble
    c %printed as though in bass clef
    \clef treble
    c % Should be one ledger line above not below the staff in bass clef
    \clef bass
    c % Correctly printed in the assumed Treble clef
  }
}

Comment from Harm:

\retrograde was implemented in 2.13.x
See
http://lilypond.org/doc/v2.13/Documentation/changes-big-page.html

There you can read:
"A minimal composer toolkit of modal transformations is provided. A
motif may be transposed, inverted and/or converted to its retrograde
within any scale."
This should be read as: "A composer toolkit, with minimal functionality." ;)

In 2.17.-NR
http://lilypond.org/doc/v2.17/Documentation/notation/changing-multiple-pitches#retrograde
you can read
"Known issues and warnings
Manual ties inside \retrograde will be broken and generate warnings. ... "

Though not only Ties are broken. As the Nr-example shows Slurs are not
printed. Hairpins will return warnings, every simple \override will
lead to surprising results, setting clef-changes (much more complex,
than a simple \override), too.

So far I've tested.

So yes, \retrograde should be improved.
I'd call it an enhancement-request.


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