のんびり眺める用
角度の黄金比分割とか 出展 - Nature by Number http://www.etereaestudios.com/movies/nbyn_movies/nbyn_mov_youtube.htm
/**
* Copyright keno42 ( http://wonderfl.net/user/keno42 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/rXE6
*/
// forked from keno42's ひまわりっぽいやつ
// 角度の黄金比分割とか 出展 - Nature by Number http://www.etereaestudios.com/movies/nbyn_movies/nbyn_mov_youtube.htm
package
{
import flash.display.*;
import flash.events.*;
import flash.geom.*;
import flash.filters.*;
import flash.utils.*;
public class FlashTest extends Sprite {
private var MAX_NUM:int = 1800;
private var num:int = MAX_NUM;
private var gv:Number = 0;
private var ga:Number = 0;
private var angle:Number = 0;
private var firstP:Particle = new Particle();
private var lastP:Particle = firstP;
private var bmpData:BitmapData = new BitmapData(465,465,false,0x0);
private var timer:Timer = new Timer(5100);
public function FlashTest() {
// write as3 code here..
this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
addChild( new Bitmap( bmpData ) );
shoot(firstP, angle);
timer.addEventListener(TimerEvent.TIMER, onTimer);
stage.addEventListener(MouseEvent.CLICK, onClick);
timer.start();
}
private function onClick(e:MouseEvent):void{
randomRefresh();
}
private function onTimer(e:TimerEvent):void{
randomRefresh();
}
private function randomRefresh():void{
if( num != 0 ) return;
var tempNum:int = MAX_NUM;
var p:Particle = firstP;
var angleDiff:Number = Math.random() * Math.PI * 2;
var rBase:int = Math.random() * 0xFF;
var gBase:int = Math.random() * 0xFF;
var bBase:int = Math.random() * 0xFF;
var rGoal:int = Math.random() * 0xFF;
var gGoal:int = Math.random() * 0xFF;
var bGoal:int = Math.random() * 0xFF;
angle = 0;
do {
tempNum--;
angle += angleDiff;
p.toX = 232 + Math.sqrt(tempNum) * Math.cos(angle) / (MAX_NUM / 9000);
p.toY = 232 + Math.sqrt(tempNum) * Math.sin(angle) / (MAX_NUM / 9000);
p.color =
Math.floor(rBase + ( (rGoal-rBase) * tempNum / MAX_NUM )) << 16 |
Math.floor(gBase + ( (gGoal-gBase) * tempNum / MAX_NUM )) << 8 |
Math.floor(bBase + ( (bGoal-bBase) * tempNum / MAX_NUM ));
} while( p = p.next );
}
private function onEnterFrame(e:Event):void{
var p:Particle = firstP;
bmpData.lock();
do {
p.update();
bmpData.setPixel(p.x, p.y, p.color);
} while( p = p.next )
bmpData.applyFilter(bmpData,bmpData.rect,new Point(),new BlurFilter(2,2));
bmpData.unlock();
if( num > 0 ){
for( var i:int = 0; i < gv; i++ ){
num--;
var temp:Particle = new Particle();
angle += Math.PI * 137.5077 / 180;
shoot(temp, angle);
lastP.next = temp;
lastP = temp;
if( num == 0 ) break;
}
gv += ga;
ga += 0.02;
}
}
private function shoot(p:Particle, angle:Number):void{
p.x = 232;
p.y = 232;
p.toX = 232 + Math.sqrt(num) * Math.cos(angle) / (MAX_NUM / 9000);
p.toY = 232 + Math.sqrt(num) * Math.sin(angle) / (MAX_NUM / 9000);
p.color =
(0xCC + Math.ceil( 0x33 - 0x33 * num / MAX_NUM )) << 16 |
(0x88 + Math.ceil( 0x77 - 0x77 * num / MAX_NUM )) << 8 |
(Math.ceil( 0x44 * num / MAX_NUM ));
}
}
}
final class Particle
{
public var x:Number;
public var y:Number;
public var toX:Number;
public var toY:Number;
public var color:uint;
public var next:Particle;
public function update():void{
x += 0.1 * (toX-x);
y += 0.1 * (toY-y);
}
}