draw-spline

Draws a three-point spline using the current pen.

• (send a-dc draw-spline x1 y1 x2 y2 x3 y3) -> void
      x1 : real number
      y1 : real number
      x2 : real number
      y2 : real number
      x3 : real number
      y3 : real number

  Restrictions on the magnitude of drawing coordinates are described with dc<%>.