grid.pattern_text {gridpattern}

Text character patterned grobs

Description

grid.pattern_text() draws a text character pattern onto the graphic device.

Usage

grid.pattern_text(
  x = c(0, 0, 1, 1),
  y = c(1, 0, 0, 1),
  id = 1L,
  ...,
  colour = gp$col %||% "grey20",
  angle = 30,
  spacing = 0.05,
  xoffset = 0,
  yoffset = 0,
  units = "snpc",
  scale = 0.5,
  shape = "X",
  grid = "square",
  type = NULL,
  subtype = NULL,
  rot = 0,
  alpha = gp$alpha %||% NA_real_,
  size = gp$fontsize %||% 12,
  fontfamily = gp$fontfamily %||% "sans",
  fontface = gp$fontface %||% "plain",
  use_R4.1_masks = getOption("ggpattern_use_R4.1_masks",
    getOption("ggpattern_use_R4.1_features")),
  png_device = NULL,
  res = getOption("ggpattern_res", 72),
  default.units = "npc",
  name = NULL,
  gp = gpar(),
  draw = TRUE,
  vp = NULL
)

Arguments

x

A numeric vector or unit object specifying x-locations of the pattern boundary.

y

A numeric vector or unit object specifying y-locations of the pattern boundary.

id

A numeric vector used to separate locations in x, y into multiple boundaries. All locations within the same id belong to the same boundary.

...

Currently ignored.

colour

Stroke colour(s).

angle

Rotation angle in degrees.

spacing

Spacing between repetitions of pattern (in units units).

xoffset

Shift pattern along x axis (in units units).

yoffset

Shift pattern along y axis (in units units).

units

grid::unit() units for spacing, xoffset, and yoffset parameters.

scale

For star polygons, multiplier (between 0 and 1) applied to exterior radius to get interior radius.

shape

A character or expression vector. See label argument of grid::textGrob() for more details.

grid

Adjusts placement and density of certain graphical elements. "square" (default) is a square grid. "hex" is a hexagonal grid suitable for hexagonal and triangular tiling. "hex_circle" is a hexagonal grid suitable for circle packing. "elongated_triangle" is a grid used for the "elongated triangle" tiling.

type

Adjusts the repeating of certain aesthetics such as color. Can use any type in names_hex, names_square, or names_weave. See for pattern_hex(), pattern_square(), and pattern_weave() for more information about supported type arguments.

subtype

See for pattern_hex(), pattern_square(), and pattern_weave() for more information about supported subtype arguments.

rot

Angle to rotate regular polygon (degrees, counter-clockwise).

alpha

Alpha (between 0 and 1) or NA (default, preserves colors' alpha value).

size

Fontsize

fontfamily

The font family. See grid::gpar() for more details.

fontface

The font face. See grid::gpar() for more details.

use_R4.1_masks

If TRUE use the grid mask feature introduced in R v4.1.0. If FALSE do a rasterGrob approximation. If NULL try to guess an appropriate choice. Note not all graphic devices support the grid mask feature.

png_device

“png” graphics device to save intermediate raster data with if use_R4.1_masks is FALSE. If NULL and suggested package ragg is available and versions are high enough we directly capture masked raster via ragg::agg_capture(). Otherwise we will use png_device (default ragg::agg_png() if available else grDevices::png()) and png::readPNG() to manually compute a masked raster.

res

Resolution of desired rasterGrob in pixels per inch if use_R4.1_masks is FALSE.

default.units

A string indicating the default units to use if x or y are only given as numeric vectors.

name

A character identifier.

gp

An object of class "gpar", typically the output from a call to the function gpar. This is basically a list of graphical parameter settings.

draw

A logical value indicating whether graphics output should be produced.

vp

A Grid viewport object (or NULL).

Value

A grid grob object invisibly. If draw is TRUE then also draws to the graphic device as a side effect.

Examples

if (capabilities("png") &&
    gridpattern:::device_supports_unicode()) {
  x_hex <- 0.5 + 0.5 * cos(seq(2 * pi / 4, by = 2 * pi / 6, length.out = 6))
  y_hex <- 0.5 + 0.5 * sin(seq(2 * pi / 4, by = 2 * pi / 6, length.out = 6))

  playing_card_symbols <- c("\u2660", "\u2665", "\u2666", "\u2663")
  grid.pattern_text(x_hex, y_hex,
                   shape = playing_card_symbols,
                   colour = c("black", "red", "red", "black"),
                   size = 18, spacing = 0.1, angle = 0)
}