Plot a shadow — mf_shadow • mapsf

Plot the shadow of a polygon layer.

Usage

mf_shadow(
  x,
  col,
  cex = 1,
  add = FALSE,
  extent = x,
  bg,
  expandBB = rep(0.04, 4)
)

x: an sf or sfc polygon object
col: shadow color, hex code or color name given by colors. The default color is the highlight color (see mf_theme).
cex: shadow extent
add: whether to add the layer to an existing plot (TRUE) or not (FALSE)
extent: sf object used to define the map extent; defaults to x. extent and x must use the same CRS.
bg: background color of the map, hex code or color name given by colors, ignored if add = TRUE
expandBB: expension of the map area in each direction (bottom, left, top, right). The expension is expressed as a share of x width (for left and right values) or a share of x height (for bottom and top values).

x is (invisibly) returned.

mtq <- mf_get_mtq()
mf_shadow(mtq)
mf_map(mtq, add = TRUE)