glissandos and chords

[Josh Parmenter]

Hi all - 

Does anyone have a suggestion for having the glissando drawn between both members of the chord in the example below?

Thanks for your help.

best,

Josh

\paper { ragged-right = ##t }

\version "2.11.58"

myGliss = {

  \clef bass

  \time 4/4

  <a c>2 \glissando <b d>2

  }

\score {

  \new Staff \myGliss

}

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

/* 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

*/