Popisvoid swf_shapecurveto ( float x1, float y1, float x2, float y2 )
Draws a quadratic bezier curve from the current location, though the two given points.
The current position is then set to the point defined by the
x-coordinate of the first point.
y-coordinate of the first point.
x-coordinate of the second point.
y-coordinate of the second point.