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看到閃吧某網友在學習這個的過程中碰到一些問題，就幫解答一下。在此寫寫教程，有不足之處，還請大家指點。粒子特效軟件的功能還很多，有愛好的可以自行研究下

旋轉特效效果

代碼如下：

var pMaxSize:Number = 150;
var pCenterX:Number = 275;
var pCenterY:Number = 200;
var pNumTraces:Number = 20;
var pNumLayers:Number = 30;
var pCurrentLayer:Number = 0;
var pLineColour:Number;
var pPointDegree:Array = new Array();
var pPointDegreeChange:Array = new Array();
var pPointScale:Array = new Array();
var pPointScaleChange:Array = new Array();
var pPointX:Array = new Array();
var pPointY:Array = new Array();
var pBaseTimeline:MovieClip;
var pIntervalId:Number;
function init(baseTimeline:MovieClip):Void {
pBaseTimeline = baseTimeline;
pBaseTimeline.createEmptyMovieClip("holder", 0);
for (var j:Number = 0; j<pNumLayers; j ) {
pBaseTimeline.createEmptyMovieClip("layer" j, j 1);
pBaseTimeline["layer" j]._x = pCenterX;
pBaseTimeline["layer" j]._y = pCenterY;
}
initTraces();
pBaseTimeline.holder.onEnterFrame = function() {
moveSpheres();
};
pIntervalId = setInterval(this, "updateSeeds", 2000);
}
function initTraces() {
for (var i:Number = 0; i<pNumTraces; i ) {
pPointX = 0;
pPointY = 0;
pPointDegree = (6.28318530718/pNumTraces)*i;
pPointScale = 50;
}
updateSeeds();
for (i=0; i<pNumTraces; i ) {
plotLine(i);
}
}
function moveSpheres() {
for (var i:Number = 0; i<pNumTraces; i ) {
pPointDegree = pPointDegreeChange;
pPointScale = pPointScaleChange;
plotLine(i, true);
}
pBaseTimeline["layer" pCurrentLayer]._alpha = 100;
pCurrentLayer = (pCurrentLayer 1)%pNumLayers;
for (var j:Number = 0; j<pNumLayers; j ) {
pBaseTimeline["layer" ((pCurrentLayer j)%pNumLayers)]._alpha = (j/pNumLayers)*100;
}
pBaseTimeline["layer" pCurrentLayer].clear();
}
function plotLine(i:Number, drawLine:Boolean) {
pBaseTimeline["layer" pCurrentLayer].lineStyle(1, pLineColour, 100);
pBaseTimeline["layer" pCurrentLayer].moveTo(pPointX, pPointY);
pPointX = (Math.cos(pPointDegree)*pPointScale);
pPointY = (Math.sin(pPointDegree)*pPointScale);
if (drawLine == true) {
pBaseTimeline["layer" pCurrentLayer].lineTo(pPointX, pPointY);
}
}
function updateSeeds() {
var deg:Number;
var scale:Number;
deg = randomRange(-100, 100)/2000;
if (pPointScale[0]>pMaxSize) {
scale = randomRange(-10, 0)/2;
} else if (pPointScale[0]<-pMaxSize) {
scale = randomRange(0, 10)/2;
} else {
scale = randomRange(-10, 10)/2;
}
for (var i:Number = 0; i<pNumTraces; i ) {
pPointDegreeChange = deg;
pPointScaleChange = scale;
}
pLineColour = randomRange(0, 0xFFFFFF);
}
function randomRange(min:Number, max:Number):Number {
var randomNum:Number = Math.round(Math.random()*(max-min)) min;
return randomNum;
}
init(this);

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