forked from: forked from: 渦巻
渦、台風っぽく
高速化しないと重いな
ブラーもかけたいかも
じっと見てると目をまわします
/**
* Copyright hacker_w2kqj15r ( http://wonderfl.net/user/hacker_w2kqj15r )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/n2QX
*/
// forked from yd_niku's forked from: 渦巻
// forked from okoi's 渦巻
//
// 渦、台風っぽく
// 高速化しないと重いな
// ブラーもかけたいかも
// じっと見てると目をまわします
//
package
{
import flash.display.*;
import flash.geom.*;
import flash.events.Event;
/**
* ...
* @author okoi
*/
import flash.filters.BlurFilter;
import flash.events.MouseEvent;
import flash.accessibility.Accessibility;
import flash.filters.BitmapFilter;
public class Main extends Sprite
{
private var spire:Spire;
private static const POWDER_NUM:int = 10000;
private var _container:Bitmap;
private var _firstPowder:Powder;
private var _canvas:BitmapData;
private var _filter:BitmapFilter;
private var _gain:ColorTransform;
[SWF(frameRate=120)]
public function Main():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
// entry point
spire = new Spire();
_container = new Bitmap();
_container.scaleX = _container.scaleY = 2;
addChild( _container );
_filter = new BlurFilter(2,2);
_gain = new ColorTransform(0.97,0.97,0.99,1, -2, -2, 4 );
setupDisplay();
stage.addEventListener(MouseEvent.MOUSE_DOWN,mouseHandler);
stage.addEventListener(MouseEvent.MOUSE_UP,mouseHandler);
addEventListener( Event.ENTER_FRAME, EnterFrame );
stage.addEventListener(Event.RESIZE,resizeHandler);
}
private function mouseHandler(e:MouseEvent):void {
switch(e.type) {
case MouseEvent.MOUSE_UP:
Powder.speed = 1;
break;
case MouseEvent.MOUSE_DOWN:
Powder.speed = 6;
break;
case MouseEvent.MOUSE_MOVE:
Powder.speed++;
break;
}
}
private function EnterFrame(e:Event):void {
spire.Update( stage.mouseX, stage.mouseY );
var c:uint = 0xFFFFFF;
_canvas.lock();
_canvas.colorTransform( _canvas.rect, _gain );
var powder:Powder = _firstPowder;
do{
powder.Move( spire );
_canvas.setPixel(powder.posX>>1, powder.posY>>1,c );
}
while( (powder = powder.next) != null );
_canvas.applyFilter( _canvas, _canvas.rect, o, _filter );
_canvas.unlock();
}
private var o:Point = new Point();
private function resizeHandler(e:Event):void{
setupDisplay();
}
private function setupDisplay():void{
_firstPowder = null;
var powder:Powder, pre:Powder;
var sw:Number = stage.stageWidth;
var sh:Number = stage.stageHeight;
for ( var i:int = 0; i < POWDER_NUM; i++ )
{
var x:Number = Math.random() * sw;
var y:Number = Math.random() * sh;
powder = new Powder(x, y, int(Math.random() * 1000));
if( !_firstPowder ) _firstPowder = powder;
if( pre ) pre.next = powder;
pre = powder;
}
if( _canvas ) {
_canvas.dispose();
_canvas = null;
}
_canvas = new BitmapData( sw>>1, sh>>1, false, 0 );
_container.bitmapData = _canvas;
}
}
}
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
import flash.display.Stage;
/**
* 渦エネルギー
*/
class Spire {
public var centerX:int;
public var centerY:int;
public var rotatePower:Number = 10;
/**
* 更新
* @param _x
* @param _y
*/
public function Update(_x:int, _y:int):void
{
centerX = _x;
centerY = _y;
}
}
/**
* 渦エネルギーの犠牲となる粉
*/
class Powder {
public var next:Powder;
public var posX:Number;
public var posY:Number;
public var defX:Number;
public var defY:Number;
public var life:int;
public var alpha:Number = 0;
public static var speed:Number = 2.0;
public function Powder(_x:Number, _y:Number, _l:int)
{
Set(_x, _y, _l);
}
public function Set(_x:Number, _y:Number, _l:int):void
{
posX = _x;
posY = _y;
life = _l;
defX = _x;
defY = _y;
alpha = 1;
}
public function Move(s:Spire):void
{
var rnd:Number = Math.random()-0.5;
var vecX:Number = (posX - s.centerX);
var vecY:Number = (posY - s.centerY);
var r:Number = Math.sqrt( vecX * vecX + vecY * vecY );
var angle:Number = Math.atan2( vecY, vecX ) * 180 / Math.PI;
var vecX2:Number = Math.cos( (angle + s.rotatePower) * Math.PI / 180 ) * r;
var vecY2:Number = Math.sin( (angle + s.rotatePower) * Math.PI / 180 ) * r;
vecX = (vecX2 - vecX);
vecY = (vecY2 - vecY);
r = Math.sqrt( vecX * vecX + vecY * vecY );
vecX /= r;
vecY /= r;
posX += vecX * 4 * speed + rnd*2;
posY += vecY * 1 * speed + rnd*2;
life--;
if ( life <= 0 )
{
posX = defX;
posY = defY;
life = 1000 + Math.random()*100>>0;
alpha = 0;
}
if ( alpha < 1 ) alpha += 0.1;
}
}