Method: PDF::Writer::Graphics#rotate_axis

Defined in:
lib/extensions/pdf-writer/pdf/writer/graphics.rb

#rotate_axis(angle) ⇒ Object

Rotate the axis of the coordinate system by the specified clockwise angle.



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# File 'lib/extensions/pdf-writer/pdf/writer/graphics.rb', line 762

def rotate_axis(angle)
  rad = PDF::Math.deg2rad(angle)
  tt  = "\n%.3f %.3f %.3f %.3f 0 0 cm"
  tx  = [ Math.cos(rad), Math.sin(rad), -Math.sin(rad), Math.cos(rad) ]
  add_content(tt % tx)
  self
end