3 texidoc = "Concave beams should be horizontal. informally spoken,
4 concave refers to the shape of the notes that are opposite a
5 beam. If an up-beam has high notes on its center stems, then we call
6 it concave. This example shows borderline cases. Only the beams
7 that are marked `horiz' should be printed horizontally. " }
12 it is that makes a beam concave is still unclear.
14 Beams 1 and 3 should be sloped, 2 and 4 should be horizontal. Two
15 sane attempts of calculating concaveness of a beam fail to distinguish
23 %% This case seems easy: second beam should be horizontal.
25 %% SCS-I Menuet I, m15
34 %% SCS-I Menuet II, m20
39 fis,^"horiz." a c es d c
41 %%% Sarabande: the first beam, obviously more concave, is not horizontal,
42 %%% but is matched with the next beam in the piece: context.
52 %% concaveness:a: 0.12
55 % Hmm. Concaveness of both: 1.75
56 % %% SCS-VI Prelude, m81
62 % %% SCS-VI Prelude, m82
63 % %% slope = 0.1ss (possibly b.o. context?)
67 %%% Han-Wen: this should be concave
68 [a,16^"horiz." a' a a]
72 %%%% This should not be concave (hwn)
73 [\stemUp bes8 \stemDown d'8 bes8]
81 %% LilyPond-indent-level:2