R/shadowtext.R

In lillion/emittr: Hilfsfunktionen fuer die psychologische Forschung

shadowtext <- function(x, y=NULL, labels, col='white', bg='black',
                       theta= seq(pi/4, 2*pi, length.out=8), r=0.05, ... ) {
  
  xy <- xy.coords(x,y)
  xo <- r*strwidth('A')
  yo <- r*strheight('A')
  
  for (i in theta) {
    text( xy$x + cos(i)*xo, xy$y + sin(i)*yo, labels, col=bg, ... )
  }
  text(xy$x, xy$y, labels, col=col, ... )
}