Re: make-tie-stencil: bug? and optional values?

[David Kastrup]

Thomas Morley <address@hidden> writes:

> Hi,
>
> with
> https://sourceforge.net/p/testlilyissues/issues/3088/
> I implemented \undertie markup based on Jan's proposal.
>
> I now wanted to use make-tie-stencil for other stuff and noticed some 
> problems.
>
> (1)
> The local binding of slur-height, based on Jan's:
>
> %% FIXME: c&p from bezier-bow.cc
> #(define (F0_1 x) (* (/ 2 PI) (atan (* PI x 0.5))))
> #(define (slur-height w h_inf r_0)
>   (F0_1 (* (/ (* w r_0) h_inf) h_inf)))
>
> Though, isn't there a wrong bracketing in slur-height?
>
> In bow-bezier.cc it's:
>
> Real
> slur_height (Real width, Real h_inf, Real r_0)
> {
>   return F0_1 (width * r_0 / h_inf) * h_inf;
> }
>
> Shouldn't it be?
>     (slur-height
>       (lambda (w h_inf r_0)
>         (* (F0_1 (/ (* w r_0) h_inf)) h_inf)))
>
> Because my lack of C++-knowledge, I thought to better ask before
> providing a patch.

Well, yeah.  (* (/ ... h_inf) h_inf)  does not make a whole lot of sense
either way.

-- 
David Kastrup