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3.2.105 slur-interface
A slur.
The following properties may be set in the details list.
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region-size Size of region (in staff spaces) for determining potential endpoints in the Y direction.
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head-encompass-penalty Demerit to apply when note heads collide with a slur.
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stem-encompass-penalty Demerit to apply when stems collide with a slur.
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edge-attraction-factor Factor used to calculate the demerit for distances between slur endpoints and their corresponding base attachments.
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same-slope-penalty Demerit for slurs with attachment points that are horizontally aligned.
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steeper-slope-factor Factor used to calculate demerit only if this slur is not broken.
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non-horizontal-penalty Demerit for slurs with attachment points that are not horizontally aligned.
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max-slope The maximum slope allowed for this slur.
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max-slope-factor Factor that calculates demerit based on the max slope.
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free-head-distance The amount of vertical free space that must exist between a slur and note heads.
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absolute-closeness-measure Factor to calculate demerit for variance between a note head and slur.
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extra-object-collision-penalty Factor to calculate demerit for extra objects that the slur encompasses, including accidentals, fingerings, and tuplet numbers.
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accidental-collision Factor to calculate demerit for
Accidentalobjects that the slur encompasses. This property value replaces the value ofextra-object-collision-penalty.-
extra-encompass-free-distance The amount of vertical free space that must exist between a slur and various objects it encompasses, including accidentals, fingerings, and tuplet numbers.
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extra-encompass-collision-distance This detail is currently unused.
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head-slur-distance-factor Factor to calculate demerit for variance between a note head and slur.
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head-slur-distance-max-ratio The maximum value for the ratio of distance between a note head and slur.
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gap-to-staffline-inside Minimum gap inside the curve of the slur where the slur is parallel to a staffline.
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gap-to-staffline-outside Minimum gap outside the curve of the slur where the slur is parallel to a staffline.
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free-slur-distance The amount of vertical free space that must exist between adjacent slurs. This subproperty only works for
PhrasingSlur.-
edge-slope-exponent Factor used to calculate the demerit for the slope of a slur near its endpoints; a larger value yields a larger demerit.
User settable properties:
annotation(string)Annotate a grob for debug purposes.
avoid-slur(symbol)Method of handling slur collisions. Choices are
inside,outside,around, andignore.insideadjusts the slur if needed to keep the grob inside the slur.outsidemoves the grob vertically to the outside of the slur.aroundmoves the grob vertically to the outside of the slur only if there is a collision.ignoredoes not move either. In grobs whose notational significance depends on vertical position (such as accidentals, clefs, etc.),outsideandaroundbehave likeignore.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.
dash-definition(pair)List of
dash-elementsdefining the dash structure. Eachdash-elementhas a starting t value, an ending t-value, adash-fraction, and adash-period.details(list)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
detailsproperty.direction(direction)If
side-axisis0(orX), then this property determines whether the object is placedLEFT,CENTERorRIGHTwith respect to the other object. Otherwise, it determines whether the object is placedUP,CENTERorDOWN. Numerical values may also be used:UP=1,DOWN=-1,LEFT=-1,RIGHT=1,CENTER=0.eccentricity(number)How asymmetrical to make a slur. Positive means move the center to the right.
height-limit(dimension, in staff space)Maximum slur height: The longer the slur, the closer it is to this height.
inspect-index(integer)If debugging is set, set beam and slur configuration to this index, and print the respective scores.
inspect-quants(pair of numbers)If debugging is set, set beam and slur quants to this position, and print the respective scores.
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).positions(pair of numbers)Pair of staff coordinates
(left . right), where both left and right are instaff-spaceunits of the current staff. For slurs, this value selects which slur candidate to use; if extreme positions are requested, the closest one is taken.ratio(number)Parameter for slur shape. The higher this number, the quicker the slur attains its
height-limit.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:
encompass-objects(array of grobs)Objects that a slur should avoid in addition to notes and stems.
note-columns(array of grobs)An array of
NoteColumngrobs.
This grob interface is used in the following graphical object(s): PhrasingSlur and Slur.
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