Am 27.03.2017 um 11:45 schrieb Thomas Morley: > 2017-03-27 11:38 GMT+02:00 Urs Liska <u...@openlilylib.org>: >> Hi all, >> >> I want to know if a given notehead has a stem attached. Obviously even >> whole notes do have a stem object, but with zero extent. >> >> I've found the following calculation to be reliable, but I can't imagine >> it has to be so complicated: >> >> (if (or (= +inf.0 (car stem-y-extent)) >> (= -inf.0 (car stem-y-extent)) >> (= +inf.0 (cdr stem-y-extent)) >> (= -inf.0 (cdr stem-y-extent))) >> >> (with stem-y-extent being the Y-extent property of the stem object). >> >> I think there should be some property I can ask directly about this? But >> I didn't find any suspicious entry for Stem or stem-interface. >> >> Any suggestions? >> Urs > interval-sane? > > exp.: > > (interval-sane? (ly:stencil-extent empty-stencil X)) > --> #f > > Maybe grob::is-live? may help as well, didn't test that.
Ah, no, but it brought me in the right direction. While (ly:grob-object notehead 'stem) does give an object (ly:grob-property stem 'stencil) => '() Thanks Urs > > > HTH, > Harm -- u...@openlilylib.org https://openlilylib.org http://lilypondblog.org _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
