Am 03.01.2017 um 17:01 schrieb Alexander Kobel: > On 2017-01-03 16:27, Urs Liska wrote: >> Just for reference, attached you'll find my preliminary result with a >> compound slur that is somewhat more "mainstream" than the original Sorabji >> example :-) > Geez! Apparently there's not just a need for irrational tuplets, but also > Bézier curves of arbitrary degrees for slurs! Some NURBS anyone? ;-) > I assume you joined two slurs for that huge one due to the lack of better > options?
Internally that's what happens. But by now it's not necessary anymore to
fiddle around with this (and especially keeping the slur ends in sync).
Last September I wrote a function \compoundSlur (which is in
openLilyLIb, but still on a branch) which you apply instead of a slur
start and where you can configure the inflection points. The current
compound slur has been defined like this:
\compoundSlur \with {
annotate = ##t
show-grid = ##t
start-point = #'(0.5 . -17)
start-angle = -15
start-ratio = 0.4
end-point = #'(0 . 0)
end-angle = -90
end-ratio = 0.06
inflection =
#'((X-ratio . .11)
(Y-offset . 5)
(angle . 35)
(ratio-left . 0.9)
(ratio-right . 0.16))
}
I reattach a rendering *with* both the grid and the helper crosses and
lines which significantly helps with shaping such a curve. The
interesting point is that you can add an arbitrary number of inflection
points like this, and the function will automatically make sure the
segments are well connected, and with a straight line (i.e. the neighbor
control points are in exactly opposite directions).
You can read more about that in a thread "What to do wanting a 4th order
Bézier?" and one "Compound Slurs", both from last September.
Best
Urs
>
> Cheers,
> Alexander
--
u...@openlilylib.org
https://openlilylib.org
http://lilypondblog.org
compound-slur-example-ravel-ondine-62.pdf
Description: Adobe PDF document
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