4 texidoc = "Concave beams should be horizontal. Informally spoken,
5 concave refers to the shape of the notes that are opposite a
6 beam. If an up-beam has high notes on its center stems, then we call
7 it concave. This example shows borderline cases. Only the beams
8 that are marked `horiz' should be printed horizontally. " }
13 it is that makes a beam concave is still unclear.
15 Beams 1 and 3 should be sloped, 2 and 4 should be horizontal. Two
16 sane attempts of calculating concaveness of a beam fail to distinguish
24 %% This case seems easy: second beam should be horizontal.
26 %% SCS-I Menuet I, m15
35 %% SCS-I Menuet II, m20
40 fis,^"horiz." a c es d c
42 %%% Sarabande: the first beam, obviously more concave, is not horizontal,
43 %%% but is matched with the next beam in the piece: context.
53 %% concaveness:a: 0.12
54 a'16-[^"horiz." b c b]
56 % Hmm. Concaveness of both: 1.75
57 % %% SCS-VI Prelude, m81
63 % %% SCS-VI Prelude, m82
64 % %% slope = 0.1ss (possibly b.o. context?)
68 %%% Han-Wen: this should be concave
69 a,16-[^"horiz." a' a a]
73 %%%% This should not be concave (hwn)
74 [\stemUp bes8 \stemDown d'8 bes8]
82 %% LilyPond-indent-level:2