Thanks Dieter for pointing me to the email thread. And thanks to you, Don, for that exquisite explanation!
Regards -- Danai On Sun, 12 May 2019 at 00:01, Don Simons <[email protected]> wrote: > > Hi, Danai-- > > I'm really glad you mentioned the 3rd bar in your text, because when I > compiled your source after simply cutting and pasting it from the email > without looking at it in detail, it came out with just 2 bars that looked > awful. I soon realized that in the email process the first two "/r2d"s had > been stuck on the end of their preceding lines, and therefore ignored (since > PMX ignores everything after the first "/" in a line.) > > Anyhow, there is an explanation for what you're seeing and a fairly effective > work-around, none of which is explained in the manual. The key fact is that > from PMX's perspective, default beam stem directions and lengths are what > they would be if you ignore the "z" chord notes. So in your example the > default direction was up, and the stems are only as long as needed for the > low F's. If you make the highest note in each chord the main note, like this: > > d82a zd+ [u d8 o. za zf e+ o> za- zf ] [u f+ o_ za- zf e+ o. za- zf d+ op za > zf ] / > > it comes out much nicer. Now you do need to force the beams to be upward > because the default would now be downward since the main notes are now all on > or above the middle line. > > As you can imagine, the code logic for beamed, ornamented chords as it stands > is quite complex, involving computing the heights and angles of the beams and > then the vertical positions of the ornaments. Of course it could conceivably > be enhanced to automagically select more pleasing positioning regardless of > which note is entered as the main chord note, but that would make the coding > even more complicated, plus it would create backward incompatibilities, so > I'm not inclined to pursue it. > > But don't hesitate to raise more questions as they arise! I'm always happy to > see people using PMX. > > --Don > > > -----Original Message----- > > From: TeX-Music [mailto:tex-music- > > [email protected]] On Behalf Of Danai SAE-HAN > > (???) > > Sent: Friday, May 10, 2019 10:38 PM > > To: Werner Icking Music Archive <[email protected]> > > Subject: [Tex-music] Bug in PMX with chord stems > > > > Hi > > > > I have recently rekindled my interest in MusiXTeX / PMX with the sole > > purpose of publishing the works of one of my distant forefathers > > (Ernemann) in the public domain. > > > > I think I found a number of bugs, but it is more likely that my > > understanding > > of PMX and MusiXTeX is severely lacking or a sad case of RTM. In due course > > I will be sending a few emails to seek enlightenment from some friendly > > souls. > > > > Anyway, the first problem I would like to point out, is a strange default > > behaviour in PMX: some chord stems are positioned wrongly (too short), yet > > some ornaments seem to be positioned much higher than the beam. > > > > Attached you will find an example. The first measure shows no issues if the > > chords are an octave higher. The second one shows PMX's default > > behaviour: the stems are too short, and some ornaments are not positioned > > accordingly. > > > > The third measure shows my manual overrides. > > > > I am not sure whether it is worth exploring why PMX has this as a default > > behaviour. > > > > =========================== > > % nv,noinst,mtrnuml,mtrdenl,mtrnmp,mtrdnp,xmtrnum0,isig, > > 2 1 6 8 6 8 0 -1 > > % > > % npages,nsyst,musicsize,fracindent > > 1 1 16 0.07 > > Piano > > bt > > ./ > > d82au zd+ f8 za zd o. f8- za zd o> f8- za zd o_ f8- za zd ou f8- za zd op / > > r2d / > > > > d82au zd+ f8- za zd o. f8- za ze+ o> f8- za zf+ o_ f8- za ze+ ou f8- za zd > > op / > > r2d / > > > > d82au zd+ [+4 f8- za zd o. f8- ] za ze+ o> [+5-1 f8- za zf+ o_ f8- za > > ze+ ou f8- ] za zd op / > > r2d / > > > > %% Local Variables: > > %% mode: plain-tex > > %% End: > > =========================== > > > > > > Best regards > > > > > > -- > > Danai > > > ------------------------------- > [email protected] mailing list > If you want to unsubscribe or look at the archives, go to > https://tug.org/mailman/listinfo/tex-music ------------------------------- [email protected] mailing list If you want to unsubscribe or look at the archives, go to https://tug.org/mailman/listinfo/tex-music
