Re: how do Slur #'positions work?

[Mats Bengtsson]

I couldn't decipher all details in the implementation, but it seems
that LilyPond first generates a list of possible positions for the
left and right end of the slur. Normally, it goes through the list
and finds the slur that "looks the best", i.e. gets the highest
score according to some criterion. When you instead specify
the positions property, LilyPond will still go through its list
of alternatives and choose the one that's closest to what you
specified. In this case, it seems that you wanted something
that was higher up than what's available in the list, so that's
why you get the same result in both cases.


  /Mats

Graham Percival wrote:

> Tracking down a potential bug; in this example, both slurs have the 
> same height.  Shouldn't the second slur be much higher?  Could the 
> vertical spacing code be moving the second slur down?
>
> Cheers,
> - Graham
>
>
> \version "2.11.24"
> \relative c'' {
>         \slurUp
>     \override Slur #'positions = #'(5 . 5)
>         c8.( b16) c8. b16
>         \override Slur #'positions = #'(30 . 30)
>         c8.( b16) c8. b16
> }
>
>
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--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
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