LilyPond Internals Reference: 3.2.2 accidental-placement-interface

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Resolve accidental collisions.

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.
padding (dimension, in staff space): Add this much extra space between objects that are next to each other.
right-padding (dimension, in staff space): Space to insert on the right side of an object (e.g., between note and its accidentals).
script-priority (number): A key for determining the order of scripts in a stack, by being added to the position of the script in the user input, the sum being the overall priority. Smaller means closer to the head.

accidental-grobs (association list (list of pairs)): An alist with (notename . groblist) entries.
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): AccidentalPlacement.

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