grip (version 0.2.0)

perforated_grid_helpers: Deterministic perforated-grid occupancy helpers

Description

Convenience constructors for finite occupied grids with non-random holes or channels. These matrices can be passed to occupied.mesh.surface.graph().

Usage

keep.periodic.holes(
  h,
  w = h,
  hole_period = 4,
  hole_height = 1,
  hole_width = hole_height,
  row_offset = 2,
  col_offset = 2
)
keep.staggered.windows(
  h,
  w = h,
  window_height = 1,
  window_width = 2,
  row_period = 4,
  col_period = 5,
  row_offset = 2,
  col_offset = 2
)
keep.slit.channels(
  h,
  w = h,
  orientation = c("vertical", "horizontal"),
  slit_period = 5,
  slit_width = 1,
  bridge_spacing = 4,
  bridge_size = 1,
  offset = 2
)
keep.asymmetric.notches(h, w = h, notch_depth = 3, notch_width = 2)

Value

A logical occupancy matrix whose TRUE entries represent retained cells.

Arguments

h

Number of rows.

w

Number of columns. Defaults to h.

hole_period

Spacing between periodic holes.

hole_height

Height of each removed rectangular hole.

hole_width

Width of each removed rectangular hole.

row_offset

Starting row index for the first removed block.

col_offset

Starting column index for the first removed block.

window_height

Height of each staggered removed window.

window_width

Width of each staggered removed window.

row_period

Vertical spacing between staggered window bands.

col_period

Horizontal spacing between staggered windows within a band.

orientation

Whether slit channels run "vertical" or "horizontal".

slit_period

Spacing between repeated slit channels.

slit_width

Width of each slit channel.

bridge_spacing

Spacing between preserved bridge segments.

bridge_size

Size of each preserved bridge segment along a slit.

offset

Starting row or column index for the first slit channel.

notch_depth

Depth of each asymmetric notch cut from a boundary.

notch_width

Width of the notched opening along that boundary.

Examples

notches <- keep.asymmetric.notches(7, 8, notch_depth = 2, notch_width = 2)
holes <- keep.periodic.holes(7, 8, hole_period = 3)
slits <- keep.slit.channels(7, 8, slit_period = 3)
windows <- keep.staggered.windows(7, 8, row_period = 3, col_period = 4)