Re: \path and \postscript in staff

[Aaron Hill]

On 2018-05-24 23:15, Helge Kruse wrote:
> But these lines are outside the staff. If you change "(rlineto 10 1)" 
> to
> "(rlineto 10 10)" then the starting point is moved down to keep the
> markup outside the stuff. Further it doesn't support the x-position of
> the next/previous note column.

There is a difference in behavior between \path and \postscript 
regarding bounds.  See the following:

%%%%
  \version "2.18.2"
  {
    f'4_\markup { \postscript #"0 0 moveto 1 5 lineto stroke" }
    f'4_\markup { \path #0.1 #'((moveto 0 0) (lineto 1 5) (closepath)) }
    f'4_\markup {
      \with-dimensions #'(0 . 0) #'(0 . 0)
      \path #0.1 #'((moveto 0 0) (lineto 1 5) (closepath))
    }
  }
%%%%

By forcing the bounds of the \path-created object to be "empty," it can 
overlap the staff.

-- Aaron Hill