On 13 August 2011 17:14, Ricardo Wurmus <ricardo.wur...@gmail.com> wrote:
> I'm having a problem with a scheme engraver. Whenever I fetch the > direction property of a grob's stem object (or directly through a > listener on stem-event), the following warning is shown: > > warning: no viable initial configuration found: may not find good > beam slope > > The resulting score has a few notes with their stems pointing in the > wrong direction, so that the beams have a terribly ugly slope. As soon > as I remove the code to store the direction everything is fine again. > > I've attached a simple demo file where the chaotic stem directions can > be observed. All the code does is to save all grobs it encounters during > the acknowledge phase and then query the direction for each stored grob > during the processing phase. > > I'd be happy if you could explain to me why this happens. The stems of beamed notes have a dependency on beam direction, so if you try to get the direction of a stem which is part of a beam that hasn't been completed it can mess up the calculation (i.e., you end up with a disagreement between beam/stem directions in some cases). Cheers, Neil _______________________________________________ lilypond-devel mailing list lilypond-devel@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-devel
