curve's control points.
For the example above the following override gives a satisfactory
-tie:
+tie. Note the placement -- it has to be immediately before the note
+to which the start of the tie (or slur) is attached.
@lilypond[verbatim,quote,relative=1]
<<
- \once \override Tie
- #'control-points = #'((1 . -1) (3 . 0.6) (12.5 . 0.6) (14.5 . -1))
- { e1 ~ e1 }
+ {
+ \once \override Tie
+ #'control-points = #'((1 . -1) (3 . 0.6) (12.5 . 0.6) (14.5 . -1))
+ e1 ~ e1
+ }
\\
{ r4 <g c,> <g c,> <g c,>4 }
>>