Glissando angle

[Josh Parmenter]

Hi all,

I'm just getting started with LilyPond, and am trying to create a spatial notation, and using Glissandos to show duration. My question has to do with the middle three notes in the example below. 

1) For the connection between the B-flat to the C, then the C to the B-flat, is there a way to either just tell the Glissandos to be flat OR to predict what value I need for the #'right #'Y parameter? Or - is there a way to just draw flat lines from a note head that I just haven't found?

2) Assuming that glissandos are the way to go here, is there a way to avoid the collision between the C and the flat in the second B-flat?

Thanks for your help.

Best,

Josh

\header {

  tagline = ##f

  composer = ##f

}

\paper {

  paper-width = 14\cm

  paper-height = 7\cm

  top-margin = 0.1\cm

  left-margin = 0.1\cm

}

\include "english.ly"

lowerLower = \new Voice = "lowerLower" {

  \voiceTwo

  \override Glissando #'thickness = 5 

  \override Stem #'transparent = ##t 

  \override Glissando #'bound-details #'right #'Y = #2

  a4 \glissando s s \once \override NoteHead #'transparent = ##t a4 s s 

  \once   \override Glissando #'bound-details #'right #'Y = #2.5

  bf4 \glissando 

  \once   \override Glissando #'bound-details #'right #'Y = #3

  c'4 \glissando s s 

  bf8

  a4 \glissando s s 

  \once \override NoteHead #'transparent = ##t a4

}

\score {

\new Staff = "bass" <<

 \override Staff.TimeSignature #'transparent = ##t

 \override Staff.BarLine #'transparent = ##t

 \clef bass

 \time 4/4

 \lowerLower

>>

}

******************************************

/* Joshua D. Parmenter

http://www.realizedsound.net/josh/

“Every composer – at all times and in all cases – gives his own interpretation of how modern society is structured: whether actively or passively, consciously or unconsciously, he makes choices in this regard. He may be conservative or he may subject himself to continual renewal; or he may strive for a revolutionary, historical or social palingenesis." - Luigi Nono

*/