flash on 2011-7-21
/**
* Copyright yama3 ( http://wonderfl.net/user/yama3 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/tqil
*/
package {
import flash.display.*;
import flash.geom.*;
import flash.filters.*;
[SWF(backgroundColor="#000000", frameRate="20")]
public class FlashTest extends Sprite {
private const H:Number = 465, W:Number = 465;
private const T2:Number = 100.0, SR:Number = 18.3;
private const A:Number = (1.0001 * W) / H;
private const SY:Number = 2.0001 / H, SX:Number = 2.0001 / W;
private const DY:Number = -30, DX:Number = A * DY;
private const FadeOut:ColorTransform = new ColorTransform(1, 1, 1, 1, -15, -1, -5, 0);
private const MixPixels:BlurFilter = new BlurFilter(2, 2, 2);
private const Origin:Point = new Point(0, 0);
private const StarCopyMatrix:Matrix = new Matrix(1, 0, 0, 1, (W + 1)*0.5, (H + 1) * 0.5);
private const ScaleMatrix:Matrix = new Matrix(1 - SX * DX, 0, 0, 1 - SY * DY, DX /*hack: */-0.3, DY);
private var T:Number = 0, starShineR:Number = 18;
private var star:Sprite = new Sprite;
private var starShine:Shape = new Shape;
private var starMask:Shape = new Shape;
private var starBitmap:Bitmap = new Bitmap;
private var starBitmapData:BitmapData = new BitmapData(W, H, true, 0xff000000);
private var starBitmapData2:BitmapData = new BitmapData(W, H, true);
private var skyPatch:Sprite = new Sprite;
private var skyStars:Shape = new Shape;
private var skyColor:Shape = new Shape;
public function FlashTest() {
star.addChild(starShine); starShine.x = starShine.y = -20;
star.addChild(starMask);
starMask.graphics.beginFill(0); starMask.graphics.drawCircle(0, 0, 20); starMask.graphics.endFill();
starShine.mask = starMask;
starBitmap.bitmapData = starBitmapData;
addChild(starBitmap); addChild(skyPatch);
skyPatch.addChild(skyStars); drawStars();
skyPatch.addChild(skyColor);
skyColor.graphics.beginFill(0x1580); skyColor.graphics.drawRect(0, 0, W, H); skyColor.graphics.endFill();
skyStars.alpha = skyColor.alpha = 0;
skyColor.blendMode = "lighten";
addEventListener("enterFrame", onEnterFrame);
}
private function onEnterFrame(e:*):void {
T++;
var dX:Number = 0;
if(T < T2) {
dX = 20.5 / T2 * Math.sqrt(2) * (T2 - 1 - T);
}
if((T > T2 * 0.8) && (skyColor.alpha > 0)) {
skyColor.alpha -= 4 / T2; skyStars.alpha += 6 / T2;
}
if(T > T2 * 0.95) {
if(starShineR < SR) starShineR += 4 / T2;
}
starShine.graphics.clear();
starShine.graphics.beginFill(0xffffff);
starShine.graphics.drawCircle(20, 20, 20);
starShine.graphics.drawCircle(20 + dX, 20 + 0.3 * dX, starShineR);
starShine.graphics.endFill();
var PassN:Number = 0;
if(T == 1) {
PassN = 40; skyColor.alpha = 1;
} else if((T > T2 - 10) && (starShineR < SR)) {
if(PassN < 30) PassN += 3;
} else {
PassN = 1;
}
for(var i:int = 0; i < PassN; i++) {
starBitmapData.draw(star, StarCopyMatrix)
starBitmapData2.applyFilter(starBitmapData, starBitmapData.rect, Origin, MixPixels);
starBitmapData.draw(starBitmapData2, ScaleMatrix, FadeOut, "normal", starBitmapData.rect);
}
}
private function drawStars():void {
for(var z:int = 0; z < 100; z++) {
var xp:Number = W * Math.random(), yp:Number = H * Math.random();
var p:Point = new Point(xp - W / 2, yp - H / 2); if(p.length > 20 + 40) {
skyStars.graphics.lineStyle(1, 0x8f8fff, 50 + 50 * Math.random());
skyStars.graphics.moveTo(xp, yp); skyStars.graphics.lineTo(xp + 1, yp);
}
}
}
}
}