Re: slurs with more than 2 control points

[Urs Liska]

Am 27.11.2015 um 03:14 schrieb tisimst:
> Malte,
> 
> On Thursday, November 26, 2015, lilypond-7 [via Lilypond] <
> address@hidden> wrote:
> 
>> Hi list,
>>
>> how complicated would it be to get slurs with more than 2 control
>> points?
> 
> 
> With the current code? Nothing automatic, but you could definitely create a
> function that could take an arbitrary number of control points, but I
> can see that taking effect as a direct postscript drawing routine. I have
> done quite a few curve routines for other projects in the past so I know
> it's possible.
> 
> Slurs with an S shape often have very flat ends and slurs with
>> more than one "direction change" (sometimes used in
>> romantic/impressionistic piano music) aren't possible at all, are they?
> 
> 
> Current slurs can take the S shape, but only to an extent. By definition,
> since the slurs are defined as 3rd-order Bézier curves, they mathematically
> can only have a single inflection point. It would take a higher order curve
> to change directions more than one time. They aren't mathematically
> complex, but beyond the scope of the current code infrastructure.
> 
> In short, are they possible at the moment? No. Are they impossible? No, but
> it requires some new code. I might consider tackling that in the near
> future.

That would be a great addition, be it as an includable function or
(better) in LilyPond's code base.

Urs

> 
> Best,
> Abraham
> 
> 
> 
> 
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-- 
Urs Liska
www.openlilylib.org