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Convenience constructors for connected \(k \times k\) keep-masks that can be passed to edges.recursive.mask.grid() or recursive.mask.grid.surface.graph() to build generalized mask carpets. These helpers are meant to provide explicit benchmark motifs such as cross, border, corner, and asymmetric-hole patterns.

Usage

mask.cross(k = 5, arm_width = 1)

mask.border(k = 5, thickness = 1)

mask.corner(
  k = 5,
  width = 2,
  corner = c("top_left", "top_right", "bottom_left", "bottom_right")
)

mask.asymmetric.holes(k = 5, hole_size = 1)

Arguments

k

Mask side length.

arm_width

Width of the retained cross arms.

thickness

Border thickness for mask.border().

width

Side length of the retained corner block for mask.corner().

corner

Which corner to retain in mask.corner().

hole_size

Side length of each removed interior hole block for mask.asymmetric.holes().

Value

A logical \(k \times k\) keep-mask.

Details

The returned masks use standard matrix display orientation: rows run from top to bottom and columns run from left to right.