`grid.pattern_crosshatch()`

draws a crosshatch pattern onto the graphic device.

grid.pattern_crosshatch(
x = c(0, 0, 1, 1),
y = c(1, 0, 0, 1),
id = 1L,
...,
colour = gp$col %||% "grey20",
fill = gp$fill %||% "grey80",
fill2 = fill,
angle = 30,
density = 0.2,
spacing = 0.05,
xoffset = 0,
yoffset = 0,
alpha = gp$alpha %||% NA_real_,
linetype = gp$lty %||% 1,
size = gp$lwd %||% 1,
grid = "square",
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 |

fill |
Fill colour |

fill2 |
The fill colour for the “top” crosshatch lines. |

angle |
Rotation angle in degrees |

density |
Approx. fraction of area the pattern fills. |

spacing |
Spacing between repetitions of pattern ('snpc' units between 0 and 1). |

xoffset |
Shift pattern along x axis ('snpc' units between 0 and 1). |

yoffset |
Shift pattern along y axis ('snpc' units between 0 and 1). |

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

linetype |
Stroke linetype |

size |
Stroke linewidth |

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. |

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.

## See also

## Examples

if (require("grid")) {
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))
grid.pattern_crosshatch(x_hex, y_hex, colour = "black", fill = "blue",
fill2 = "yellow", density = 0.5)
grid.newpage()
grid.pattern_crosshatch(x_hex, y_hex, density = 0.3,
gp = gpar(col = "blue", fill = "yellow"))
}