Flash：80行AS代碼打造奇幻光影_Flash教程

推薦：用Flash的beginBitmapFill平鋪背景
之前寫過在flashmx2004中平鋪背景的方法,雖然它也是有效果的,但相對使用flash8時還是顯得有些復雜.這次介紹的是flash8中的MovieClip的新方法MovieClip.beginBit

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///// author: chenlangeer //////
///// msn: [email=chenlangeer@hotmail.com]chenlangeer@hotmail.com[/email] //////
///// blog: cgs.flash8.net //////
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import flash.display.BitmapData;
import flash.filters.*;
import flash.geom.*;
_quality = "LOW";
_root.createTextField("logo", 10, 10, 10, 220, 18);
logo.html = true;
logo.htmlText = "<FONT FACE=’Arial’ SIZE=’14’ COLOR=’#FF9900’><A HREF=’http://cgs.flash8.net’ TARGET=’_blank’>Core Graph Studio</A> </FONT><FONT FACE=’Arial’ SIZE=’12’ COLOR=’#999999’>click to redraw</FONT>";
_root.createTextField("para", 9, Stage.width-150, Stage.height-30, 150, 18);
para.html = true;
var bmp:BitmapData = new BitmapData(Stage.width, Stage.height, false, 0x0);
_root.attachBitmap(bmp, 0);
_root.createEmptyMovieClip("world", 2);
world.createEmptyMovieClip("_mc", 0);
world._mc._x = Stage.width/2;
world._mc._y = Stage.height/2;
var rad_speed:Number = 2;
var blurFilter:BlurFilter = new BlurFilter(2, 2, 1);
var f:Number = -.01;
var colorFilter:ColorMatrixFilter = new ColorMatrixFilter([.9, -.1, 0, 0, f, 0, .8, -.2, 0, f, .1, 0, .9, 0, f, 1, 0, 0, 1, 0]);
var total_nums:Number = 10;
onMouseDown = function () {
for (var i in world._mc) {
world._mc[i].removeMovieClip();
}
var a = Math.random()*.2;
t = (Math.random()-.5)*a;
z = (Math.random()-.5)*a;
para.htmlText = "<FONT SIZE=’12’ COLOR=’#999999’>z=" Math.round(z*10000)/10000 " t=" Math.round(t*10000)/10000 "</FONT>";
rad_speed = (Math.random()-.5)*3.8;
line_bool = random(5);
swirl_bool = random(3);
rnd_xy_bool = random(4);
var i = 0;
for (k=0; k<total_nums; k ) {
for (m=0; m<360; m = 5) {
var line:MovieClip = world._mc.createEmptyMovieClip("line" i, i);
if (rnd_xy_bool) {
line.ox = line.__x=line._x=k*Math.sin(m/180*Math.PI)*8 Math.random()*20;
line.oy = line.__y=line._y=k*Math.cos(m/180*Math.PI)*6 Math.random()*20;
} else {
line.ox = line.__x=line._x=k*Math.sin(m/180*Math.PI)*8;
line.oy = line.__y=line._y=k*Math.cos(m/180*Math.PI)*6;
}
line.lx = line._x*.3;
line.ly = line._y*.3;
if (random(3)) {
(new Color(line)).setTransform({rb:i*512/k/m-256, gb:i*255/k/m, bb:random(512)-256});
} else {
(new Color(line)).setTransform({rb:255, gb:255, bb:255});
}
line.onEnterFrame = function() {
if (swirl_bool) {
var x = this.__x;
this.__x = 10*Math.cos(this.__y*z)*Math.sin(this.__y*t);
this.__y = 10*Math.sin(x*z)*Math.cos(x*t);
} else {
this.__x = 10*Math.cos(this.__y*z)*Math.sin(this.__y*t);
this.__y = 10*Math.sin(this.__x*z)*Math.cos(this.__x*t);
}
this.clear();
this.lineStyle(1, 0x66EE66);
if (line_bool>1) {
this.moveTo(this.ox-this._x, this.oy-this._y);
this.lineTo(this.__x-this._x, this.__y-this._y);
} else if (line_bool == 1) {
this.moveTo(this.ox, this.oy);
this.lineTo(this.__x this.lx, this.__y this.ly);
} else {
this.moveTo(this.ox-this.lx, this.oy-this.ly);
this.lineTo(this.__x-this.lx, this.__y-this.ly);
}
this.ox = this.__x;
this.oy = this.__y;
};
i ;
}
}
clearInterval(val);
val = setInterval(onMouseDown, 20000);
};
onEnterFrame = function () {
world._mc._rotation = rad_speed;
bmp.draw(world);
bmp.applyFilter(bmp, bmp.rectangle, new Point(0, 0), blurFilter);
bmp.applyFilter(bmp, bmp.rectangle, new Point(0, 0), colorFilter);
};
world._visible = false;
world._y = 100000;
onMouseDown();

分享：Flash AS曲線的繪制
曲線的繪制原理有兩種：一種是由無數多或有限多的，即：lineTo繪制的曲線。另一種是由函數計算并由曲線函數curveTo計算而成的。重點之重是講第二點，最