GNU LilyPond

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Node:Thread, Next:Voice, Previous:StaffGroup, Up:LilyPond interpretation contexts

Thread

Handles note heads, and is contained in the Voice context. You have to instantiate this explicitly if you want to adjust the style of individual note heads.

This context creates the following grobs: Dots, Glissando, NoteHead, Rest and VoiceFollower.This context is a `bottom' context; it can not contain other contexts.

This context is built from the following engravers:

Engraver_group_engraver

A group of engravers taken together

Engraver_group_engraver is part of contexts: Lyrics, ChoirStaff, LyricsVoice, PianoStaff, GrandStaff, Thread, RhythmicStaff, Voice, Staff, ChordNames, StaffContainer, InnerStaffGroup, InnerChoirStaff, NoteNames and StaffGroup

Property_engraver

This is a engraver that converts property settings into back-end grob-property settings. Example: Voice.stemLength will set #'length in all Stem objects.

Due to CPU and memory requirements, the use of this engraver is deprecated.

Properties

Generic_property_list (list):

description of the conversion.

Defines names and types for generic properties. These are properties than can be plugged into the backend directly. See the init file generic-property.scm for details. For internal use only, deprecated.

Property_engraver is part of contexts: Lyrics, PianoStaff, GrandStaff, Grace, Thread, RhythmicStaff, Voice, Staff and ChordNames

Output_property_engraver

Interpret Music of Output_property type, and apply a function to any Graphic objects that satisfies the predicate.

Output_property_engraver is part of contexts: Grace, Thread, RhythmicStaff, Voice, Staff, Score, ChordNames, InnerStaffGroup and StaffGroup

Note_head_line_engraver

Engrave a line between two note heads, for example a glissando. If followVoice is set, staff switches also generate a line.

Properties

followVoice (boolean):

if set, note heads are tracked across staff switches by a thin line

Note_head_line_engraver is part of contexts: Thread

Rest_engraver

This engraver creates the following grobs: Dots and Rest.

Rest_engraver is part of contexts: Thread

Note_heads_engraver

Generate one or more noteheads from Music of type Note_req.

This engraver creates the following grobs: Dots and NoteHead.

Note_heads_engraver is part of contexts: Grace and Thread

Thread_devnull_engraver

Kill elements whenever we are Voice called `two' and either unison, unisilence or soloADue is set.¹. This engraver works closely together with the part combiner. When the part combiner notices that two threads are identical, it tells the Thread_devnull_engraver to discard everything in the second thread.

Thread_devnull_engraver is part of contexts: Thread

Footnotes

1. On unix systems, the file /dev/null is special device: anything written to it is discarded.

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Copyright (c) 1997--2001 Han-Wen Nienhuys and Jan Nieuwenhuizen.

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