Dear Simon, this is just perfect!
Thank you very much.
~Pierre
2015-10-10 20:30 GMT+02:00 Simon Albrecht <simon.albre...@mail.de>:
> Hello Pierre,
>
> On 10.10.2015 19:41, Pierre Perol-Schneider wrote:
>
>> Hi LilyPonders,
>>
>> I'm trying to automagically select pieces within a library.
>> My first intention was to use 'tags' but it does not seem to work a that
>> level.
>>
>
> \tag is a music function, so it can’t output scores.
>
>
>>
>> Any idea how to achieve that ?
>>
>
> I’d use some Scheme code:
>
> %%%%%%%%%%%%%%%%%%%%%%
> \version "2.19.28"
>
> my-first-piece = \relative c' {
> \mark "Level 1"
> c1 d e f g a b c
> }
>
> my-second-piece = \relative c' {
> \mark "Level 1"
> c2 d e f g a b c
> }
>
> my-third-piece = \relative c' {
> \mark "Level 2"
> c4 d e f g a b c
> }
>
> my-fourth-piece = \relative c' {
> \mark "Level 2"
> c8 d e f g a b c
> }
>
> %% define scheme lists of music expressions for each level
> #(define level-one (list my-first-piece my-second-piece))
> #(define level-two (list my-third-piece my-fourth-piece))
>
> #(define (print-by-level lst)
> ;; wrap each music expression into \score {}
> ;; and add each of the scores to the bookpart
> (let ((print-piece (lambda (mus)
> #{ \score { $mus } #})))
> ;; see ‘scm/lily-library.scm’ for add-score
> ;; (and many other useful procedures)
> (map add-score (map print-piece lst))))
>
> %% Select pieces by level:
> \book {
> \bookpart {
> %% Select only 'level 1 pieces':
> #(print-by-level level-one)
> %}
> \header {
> title = "Level I"
> }
> }
> \bookpart {
> %% Select only 'level 2 pieces':
> #(print-by-level level-two)
> %}
> \header {
> title = "Level II"
> }
> }
> }
> %%%%%%%%%%%%%%%%%%%
>
> It has been a personal breakthrough to discover the use of these functions
> from lily-library.scm…
> I hope you can make sense and use of that :-)
>
> Yours, Simon
>
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