Create a sketchy ellipse / circle grob

Draws one or more roughened ellipses whose centres are in npc [0,1] and whose radii are npc fractions of the viewport (converted to device inches in makeContent(), so a "circle" in data units may appear elliptical on a non-square panel - matching ggplot2's coordinate semantics).

Usage

sketch_ellipse_grob(
  x,
  y,
  rx,
  ry,
  roughness = 1,
  n_passes = 2L,
  seed = NULL,
  fill_style = NULL,
  hachure_angle = 45,
  hachure_gap = 0.07,
  fill_weight = 0.5,
  fill_roughness = NULL,
  fill_seed = NULL,
  fill_gp = gpar(),
  outline_gp = gpar(),
  name = NULL,
  vp = NULL
)

Arguments

x, y

Numeric npc centre coordinates (vectors).

rx, ry

Numeric npc radii (vectors, recycled to x).

roughness, n_passes, seed

Sketch parameters.

fill_style, hachure_angle, hachure_gap, fill_weight

Fill parameters; set fill_style = NULL or "solid" for outline only. "watercolor" paints translucent stacked washes.

fill_roughness

Roughness of the fill strokes. NULL (default) ties it to the outline as roughness * 0.4; set a number to control the fill texture independently of the outline.

fill_seed

Seed for the fill strokes. NULL (default) derives it from seed; set an integer to vary the fill pattern without moving the outline.

fill_gp

gpar() for the fill lines.

outline_gp

gpar() for the rough outline stroke.

name, vp

Passed to grid::gTree().

Value

A SketchEllipseGrob grob subclass.

See also

Other grob-layer: sketch_arrow_grob(), sketch_band_grob(), sketch_callout_grob(), sketch_dotplot_grob(), sketch_engrave_grob(), sketch_path_grob(), sketch_polygon_grob(), sketch_repel_grob(), sketch_spray_grob(), sketch_stroke_grob(), sketch_wedge_grob()