Flash AS代码实例：仿贝塞尔曲线控制

　2007-08-31 19:13:58　来源：WEB开发网　闂傚倷绶氬ḿ褍螞閹绢喖绠柨鐕傛嫹

闂傚倷绀侀幉锟犲垂閻㈠灚宕查柟鎵閸庡秵銇勯幒鎴濃偓鐢稿磻閹炬枼妲堟繛鍡楃С濞岊亞绱撻崒姘扁枌闁瑰嚖鎷�

婵犵數濮幏鍐川椤撴繄鎹曢梻渚€娼уú銈吤洪妸鈺佺劦妞ゆ帊鑳堕埊鏇㈡煏閸モ晛浠х紒杈╁仱閺佹捇鏁撻敓锟�闂傚倷绶氬ḿ褍螞閹绢喖绠柨鐕傛嫹　　闂傚倷鑳舵灙缂佺粯顨呴埢宥夊即閵忕姵鐎梺缁樺姇閹碱偆鐥閺屾洘绻濊箛鏇犵獥闂佺厧澹婃禍婊堚€旈崘顏佸亾閿濆骸澧ù鐘欏嫮绠鹃柛顐ゅ枎閻忋儲銇勯弴妯哄姦妞ゃ垺鐟╅幃鈩冩償閵囧府鎷�

核心提示：AS代码如下：//这个函数是用来绘制线条的 function connect(){ this.clear() this.lineStyle(3,0x660000,100) this.moveTo(anchorOne._x,anchorOne._y) this.curveTo(controlOne._x,controlO

AS代码如下：

//这个函数是用来绘制线条的
function connect(){
this.clear()
this.lineStyle(3,0x660000,100)
this.moveTo(anchorOne._x,anchorOne._y)
this.curveTo(controlOne._x,controlOne._y,anchorTwo._x,anchorTwo._y)
updateAfterEvent()
}
//这个函数是用来绘制替代描点跟控制点的MC，就绘制一个正方形吧
function createSquare(handle,side,offset){
if(offset==undefines){
offset=0
}
with(handle){
moveTo(offset,offset)
lineTo(offset,side)
lineTo(side,side)
lineTo(side,offset)
lineTo(offset,offset)
endFill()
}
}
//这是用来控制描点跟控制点的移动，并且用延时，间隔一段时间调用一次绘制线条
function setDraggable(handle){
handle.onPRess=function(){
clearInterval(_global.refreshScreen)
_global.refreshScreen=setInterval(this._parent,"connect",10)
this.startDrag(false)
}
handle.onRelease=function(){
clearInterval(_global.refreshScreen)
this.stopDrag()
}
handle.onReleaSEOutside=function(){
clearInterval(_global.refreshScreen)
this.stopDrag()
}
}
//建立描点
anchorOne=createEmptyMovieClip("anchorPoint1",this.getNextHighestDepth())
anchorOne._x=anchorOne._y=50
//填充
anchorOne.beginFill(0xcccccc,100)
//样式
anchorOne.lineStyle(0,0x000000,100,false,false,"none","miter",2)
//调用函数绘制成正方形
createSquare(anchorOne,8,-8)
//调用后方可拖动
setDraggable(anchorOne)
//另一个描点
anchorTwo=createEmptyMovieClip("anchorPoint2",this.getNextHighestDepth())
anchorTwo._x=anchorTwo._y=250
anchorTwo.beginFill(0xcccccc,100)
anchorTwo.lineStyle(0,0x000000,100,false,false,"none","miter",2)
createSquare(anchorTwo,8,-8)
setDraggable(anchorTwo)
//控制点
controlOne=createEmptyMovieClip("control1",this.getNextHighestDepth())
controlOne._x=anchorTwo._x
controlOne._y=anchorOne._y
controlOne.beginFill(0xcccccc,100)
controlOne.lineStyle(0,0x000000,100,false,false,"none","miter",2)
createSquare(controlOne,8,-8)
setDraggable(controlOne)
//最后让线条一开始就显示出来
connect()