draw.tilted.sector(x=0,y=0,edges=NA,radius=1,height=0.1,theta=pi/6,
start=0,end=pi*2,border=par("fg"),col=par("bg"),explode=0,shade=0.8)
If explode is zero, only the top and outer side of each sector will be displayed. This will sometimes fix the problem of a pie with one huge sector greater than 3*pi/2 that cannot otherwise be drawn.