Description
void 
swf_shapecurveto ( float x1, float y1, float x2, float y2)
     The swf_shapecurveto() function draws a
     quadratic bezier curve from the current location, though the x
     coordinate given by x1 and the y 
     coordinate given by y1 to the x
     coordinate given by x2 and the y coordinate
     given by y2.  The current position is then
     set to the x,y coordinates given by the x2 and
     y2 parameters