forked from: ビリビリ（Lightning Effect）
比較的簡単に実装できそうな方法で
稲妻というか放電風のビリビリを作ってみました。
マウスクリックでビリビリの出現点が変化します。
/**
* Copyright Jacky.Riawan ( http://wonderfl.net/user/Jacky.Riawan )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/qTGw
*/
// forked from mousepancyo's ビリビリ（Lightning Effect）
/*
比較的簡単に実装できそうな方法で
稲妻というか放電風のビリビリを作ってみました。
マウスクリックでビリビリの出現点が変化します。
*/
package {
import flash.filters.BlurFilter;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.events.Event;
import flash.geom.Point;
import flash.display.Sprite;
import flash.geom.ColorTransform;
import flash.geom.Matrix;
import flash.filters.GlowFilter;
import flash.events.MouseEvent;
[SWF(width="465", height="465", backgroundColor="0", frameRate="70")]
public class Main extends Sprite{
private const W:Number = 465;
private const H:Number = 465;
private const RANGE:int = 5;
private var _p:Point;
private var _sp:Sprite;
private var _ctf:ColorTransform;
private var _canvas:BitmapData;
private var _glow:BitmapData;
private var blur:BlurFilter
private var timer:int
public function Main() {
init();
addEventListener(Event.ENTER_FRAME, update) ;
stage.addEventListener(MouseEvent.CLICK, onDown);
}
private function init():void{
_p = new Point(W / 2, 30);
_sp = new Sprite();
_sp.filters = [new GlowFilter(0xC9E6FC, 1, 10, 10, 4, 3, false, false)];
_ctf = new ColorTransform(0.9, 0.96, 1, 0.9);
_canvas = new BitmapData(W,H,false,0);
blur=new BlurFilter(1,1,15)
var bm:Bitmap = new Bitmap(_canvas, "auto", true);
_glow = new BitmapData(W / RANGE, H / RANGE, false, 0);
var glowBm:Bitmap = new Bitmap(_glow, "never", true);
glowBm.blendMode = "add";
glowBm.scaleX = glowBm.scaleY = RANGE;
addChild(bm);
addChild(glowBm);
}
private function clapper(pos:Point,spread:Number):void{
var p:Point = new Point();
_sp.graphics.clear();
var num:int = Math.random() * .7;
for(var x:int=0;x<2;x++){
p.x = pos.x;
p.y = pos.y;
_sp.graphics.lineStyle(num, 0xFFFFFF, 1-num);
_sp.graphics.moveTo(p.x, p.y);
var i:int = p.y;
var n:int = 1
while(i < H){
n*=1.1+spread/8
i += n;
p.y = i;
p.x += (Math.random() * (n * spread) - n*spread/2);
_sp.graphics.lineTo(p.x, p.y);
}
}
}
private function onDown(e:MouseEvent):void{
_p = new Point(mouseX, mouseY);
clapper(_p,2)
timer=2+Math.random()*10
addEventListener(Event.ENTER_FRAME,second)
}
private function second(e:Event):void{
timer--
if(timer<0){
clapper(_p,6)
removeEventListener(Event.ENTER_FRAME,second)
}
}
private function update(e:Event):void{
_canvas.colorTransform(_canvas.rect, _ctf);
_canvas.draw(_sp);
_canvas.applyFilter(_canvas,_canvas.rect,new Point(0,0),blur)
_glow.draw(_canvas, new Matrix(1 / RANGE, 0, 0, 1 / RANGE));
_sp.graphics.clear()
}
}
}