LilyPond Internals Reference: 3.2.125 semi-tie-interface

### 3.2.125 `semi-tie-interface`

A tie which is only connected to a note head on one side. The following properties may be set in the `details` list:

`height-limit`

  Maximum tie height: The longer the tie, the closer it is to this height.

`ratio`

  Parameter for tie shape. The higher this number, the quicker the tie attains its `height-limit`.

#### User settable properties:

`control-points` (list of number pairs)

  List of offsets (number pairs) that form control points for the tie, slur, or bracket shape. For Béziers, this should list the control points of a third-order Bézier curve.

`details` (alist, with symbols as keys)

  Alist of parameters for detailed grob behavior. More information on the allowed parameters for a grob can be found by looking at the top of the Internals Reference page for each interface having a `details` property.

`direction` (direction)

  If `side-axis` is `0` (or `X`), then this property determines whether the object is placed `LEFT`, `CENTER` or `RIGHT` with respect to the other object. Otherwise, it determines whether the object is placed `UP`, `CENTER` or `DOWN`. Numerical values may also be used: `UP`=`1`, `DOWN`=`-1`, `LEFT`=`-1`, `RIGHT`=`1`, `CENTER`=`0`.

`head-direction` (direction)

  Are the note heads left or right in a semitie?

`line-thickness` (number)

  For slurs and ties, this is the diameter of the virtual “pen” that draws the two arcs of the curve’s outline, which intersect at the endpoints. This property is expressed as a multiple of the current staff-line thickness (i.e., the visual output is influenced by changes to `Staff.StaffSymbol.thickness`).

`thickness` (number)

  For grobs made up of lines, this is the thickness of the line. For slurs and ties, this is the distance between the two arcs of the curve’s outline at its thickest point, not counting the diameter of the virtual “pen” that draws the arcs. This property is expressed as a multiple of the current staff-line thickness (i.e., the visual output is influenced by changes to `Staff.StaffSymbol.thickness`).

#### Internal properties:

`annotation` (string)

  Annotate a grob for debug purposes.

`note-head` (graphical (layout) object)

  A single note head.

This grob interface is used in the following graphical object(s): `LaissezVibrerTie` and `RepeatTie`.

#### LilyPond – Internals Reference v2.24.4 (stable-branch).