LilyPond Internals Reference: 3.1.82 NoteCollision

### 3.1.82 NoteCollision

NoteCollision objects are created by: Collision_engraver.

Standard settings:

> `axes` (list):

>       '(0 1)

>   List of axis numbers. In the case of alignment grobs, this should contain only one number.

> `note-collision-threshold` (dimension, in staff space):

>   `1`

>   Simultaneous notes that are this close or closer in units of `staff-space` will be identified as vertically colliding. Used by `Stem` grobs for notes in the same voice, and `NoteCollision` grobs for notes in different voices. Default value 1.

> `prefer-dotted-right` (boolean):

>   `#t`

>   For note collisions, prefer to shift dotted up-note to the right, rather than shifting just the dot.

> `vertical-skylines` (pair of skylines):

>   `ly:axis-group-interface::calc-skylines`

>   Two skylines, one above and one below this grob.

> `X-extent` (pair of numbers):

>   `ly:axis-group-interface::width`

>   Extent (size) in the X direction, measured in staff-space units, relative to object’s reference point.

> `Y-extent` (pair of numbers):

>   `#<unpure-pure-container #<primitive-procedure ly:axis-group-interface::height> #<primitive-procedure ly:axis-group-interface::pure-height> >`

>   Extent (size) in the Y direction, measured in staff-space units, relative to object’s reference point.

This object supports the following interface(s): axis-group-interface, grob-interface, item-interface and note-collision-interface.

#### Internals Reference v2.22.2 (stable-branch).