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3.2.98 note-collision-interface

An object that handles collisions between notes with different stem directions and horizontal shifts. Most of the interesting properties are to be set in note-column-interface: these are force-hshift and horizontal-shift.

User-settable properties:

fa-merge-direction (direction)

If two ‘fa’ shape note heads get merged that are both listed in the fa-styles property but have different stem directions, enforce this note head direction for display.

merge-differently-dotted (boolean)

Merge note heads in collisions, even if they have a different number of dots. This is normal notation for some types of polyphonic music.

merge-differently-dotted only applies to opposing stem directions (i.e., voice 1 & 2).

merge-differently-headed (boolean)

Merge note heads in collisions, even if they have different note heads. The smaller of the two heads is rendered invisible. This is used in polyphonic guitar notation. The value of this setting is used by note-collision-interface.

merge-differently-headed only applies to opposing stem directions (i.e., voice 1 & 2).

note-collision-threshold (dimension, in staff space)

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)

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

Internal properties:

fa-styles (symbol list)

List of note head styles that identify ‘fa’ shape note heads.

positioning-done (boolean)

Used to signal that a positioning element did its job. This ensures that a positioning is only done once.

This grob interface is used in the following graphical object(s): NoteCollision.