# File lib/pdf/writer/graphics.rb, line 777
777:   def skew_axis(xangle = 0, yangle = 0)
778:     xr = PDF::Math.deg2rad(xangle)
779:     yr = PDF::Math.deg2rad(yangle)
780: 
781:     xr = Math.tan(xr) if xangle != 0
782:     yr = Math.tan(yr) if yangle != 0
783: 
784:     add_content("\n1 %.3f %.3f 1 0 0 cm" % [ xr, yr ])
785:     self
786:   end