Only supports the round face at the moment.

shapeGrob(
  x = 0.5,
  y = 0.5,
  width = 1,
  height = 1,
  colour = "black",
  color = colour,
  fill = NA,
  size = 1
)

Arguments

x

x-coordinate

y

y-coordinate

width

the width of the face

height

the height of the face

colour, color

the color of the face outline

fill

the color of the face

size

the size of the outer face shape