As3中的贝塞尔曲线

var resolution  :uint       = 50;
var step        :Number     = 1/resolution;

function drawCurve(p0:Point, c0:Point, c1:Point, p1:Point)
{
    var bezier  :BezierSegment  = new BezierSegment(p0, c0, c1, p1);
    var t       :Number         = 0;
    while (t <= 1)
    {
        var pt:Point = bezier.getValue(t);
        with (graphics)
        {
            lineStyle(0.1, 0x00FFFF);
            t == 0
                ? moveTo(pt.x, pt.y)
                : lineTo(pt.x, pt.y);
        }
        t+=step;
    }   
    pt = bezier.getValue(1);
    graphics.lineTo(pt.x, pt.y);    
}