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• Stroke

stroke

Defines how to draw a line.

A stroke has a paint (a solid color or gradient), a thickness, a line cap, a line join, a miter limit, and a dash pattern. All of these values are optional and have sensible defaults.

Example

#set line(length: 100%)
#stack(
  spacing: 1em,
  line(stroke: 2pt + red),
  line(stroke: (paint: blue, thickness: 4pt, cap: "round")),
  line(stroke: (paint: blue, thickness: 1pt, dash: "dashed")),
  line(stroke: 2pt + gradient.linear(..color.map.rainbow)),
)

Simple strokes

You can create a simple solid stroke from a color, a thickness, or a combination of the two. Specifically, wherever a stroke is expected you can pass any of the following values:

• A length specifying the stroke's thickness. The color is inherited, defaulting to black.
• A color to use for the stroke. The thickness is inherited, defaulting to 1pt.
• A stroke combined from color and thickness using the + operator as in 2pt + red.

For full control, you can also provide a dictionary or a stroke object to any function that expects a stroke. The dictionary's keys may include any of the parameters for the constructor function, shown below.

Fields

On a stroke object, you can access any of the fields listed in the constructor function. For example, (2pt + blue).thickness is 2pt. Meanwhile, stroke(red).cap is auto because it's unspecified. Fields set to auto are inherited.

Constructor

If a type has a constructor, you can call it like a function to create a new value of the type.

Converts a value to a stroke or constructs a stroke with the given parameters.

Note that in most cases you do not need to convert values to strokes in order to use them, as they will be converted automatically. However, this constructor can be useful to ensure a value has all the fields of a stroke.

#let my-func(x) = {
    x = stroke(x) // Convert to a stroke
    [Stroke has thickness #x.thickness.]
}
#my-func(3pt) \
#my-func(red) \
#my-func(stroke(cap: "round", thickness: 1pt))

paint

auto or color or gradient or pattern

RequiredPositional

Positional parameters are specified in order, without names.

The color or gradient to use for the stroke.

If set to auto, the value is inherited, defaulting to black.

thickness

auto or length

RequiredPositional

Positional parameters are specified in order, without names.

The stroke's thickness.

If set to auto, the value is inherited, defaulting to 1pt.

cap

auto or str

RequiredPositional

Positional parameters are specified in order, without names.

How the ends of the stroke are rendered.

If set to auto, the value is inherited, defaulting to "butt".

join

auto or str

RequiredPositional

Positional parameters are specified in order, without names.

How sharp turns are rendered.

If set to auto, the value is inherited, defaulting to "miter".

dash

none or auto or str or array or dictionary

RequiredPositional

Positional parameters are specified in order, without names.

The dash pattern to use. This can be:

• One of the predefined patterns:
  • "solid" or none
  • "dotted"
  • "densely-dotted"
  • "loosely-dotted"
  • "dashed"
  • "densely-dashed"
  • "loosely-dashed"
  • "dash-dotted"
  • "densely-dash-dotted"
  • "loosely-dash-dotted"
• An array with alternating lengths for dashes and gaps. You can also use the string "dot" for a length equal to the line thickness.
• A dictionary with the keys array (same as the array above), and phase (of type length), which defines where in the pattern to start drawing.

If set to auto, the value is inherited, defaulting to none.

View options

Variant	Details
"solid"
"dotted"
"densely-dotted"
"loosely-dotted"
"dashed"
"densely-dashed"
"loosely-dashed"
"dash-dotted"
"densely-dash-dotted"
"loosely-dash-dotted"

View example

#set line(length: 100%, stroke: 2pt)
#stack(
  spacing: 1em,
  line(stroke: (dash: "dashed")),
  line(stroke: (dash: (10pt, 5pt, "dot", 5pt))),
  line(stroke: (dash: (array: (10pt, 5pt, "dot", 5pt), phase: 10pt))),
)

miter-limit

auto or float

RequiredPositional

Positional parameters are specified in order, without names.

Number at which protruding sharp bends are rendered with a bevel instead or a miter join. The higher the number, the sharper an angle can be before it is bevelled. Only applicable if join is "miter".

Specifically, the miter limit is the maximum ratio between the corner's protrusion length and the stroke's thickness.

If set to auto, the value is inherited, defaulting to 4.0.

View example

#let points = ((15pt, 0pt), (0pt, 30pt), (30pt, 30pt), (10pt, 20pt))
#set path(stroke: 6pt + blue)
#stack(
    dir: ltr,
    spacing: 1cm,
    path(stroke: (miter-limit: 1), ..points),
    path(stroke: (miter-limit: 4), ..points),
    path(stroke: (miter-limit: 5), ..points),
)

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