BezierInfo-2/docs/images/snippets/circles_cubic/d880c4a1b3d7b651b054b008e952b493.ascii

 
    start= (r, 0)                                          
control  = (r, k)                                          
        1                                                  
control  = r · (cos(θ) + k  · sin(θ), sin(θ) - k  · cos(θ))
        2
      end= r  · (cos(θ), sin(θ))