draw-spline

Draws a three-point spline using the current pen.

• (send a-wx:canvas draw-spline x1 y1 x2 y2 x3 y3) -> void
      x1 : inexact real
      y1 : inexact real
      x2 : inexact real
      y2 : inexact real
      x3 : inexact real
      y3 : inexact real

  Restrictions on the magnitude of drawing coordinates are described with wx:dc%.