forked from: forked from: transition
/**
* Copyright Junya ( http://wonderfl.net/user/Junya )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/f2zy
*/
// forked from Nyarineko's forked from: transition
// forked from Nyarineko's transition
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Rectangle;
import flash.display.Graphics;
[SWF(width = "465", height = "465", backgroundColor = "0x000000", frameRate = "60")]
public class Main extends Sprite
{
private const TF:Boolean = true; //transition mode
private const M_WIDTH:Number = 465;
private const M_HEIGH:Number = 465;
private const OX:Number = 465 / 2;
private const OY:Number = 465 / 2;
private const V:Number = 2;
private const OBJ_MAX:Number = 60;
private var max:uint = 20;
private var amax:uint = 0;
private var _canvas:BitmapData;
private var _bmp:Bitmap;
private var _sp:Sprite;
private var _sr:Number;
private var _vr:Number;
private var first:Particle;
//------------------------------------------------------
//コンストラクタ
//------------------------------------------------------
public function Main()
{
_sp = new Sprite();
_canvas = new BitmapData(M_WIDTH, M_HEIGH, true, 0x99000000);
_bmp = new Bitmap(_canvas);
_bmp.smoothing = true;
_bmp.x = -M_WIDTH / 2;
_bmp.y = -M_HEIGH / 2;
_sp.addChild(_bmp);
_sp.x = M_WIDTH / 2;
_sp.y = M_HEIGH / 2;
addChild(_sp);
init();
stage.addEventListener(MouseEvent.CLICK,onClick);
stage.addEventListener(Event.ENTER_FRAME,enterframeHandler);
}
//------------------------------------------------------
//初期化
//------------------------------------------------------
private function init():void
{
_sr = 1;
_vr = 0.00005;
first = new Particle();
var p:Particle = first;
for(var i:uint = 0;i < max;i++){
p.ang = i * 360 / max;
p.vang = 1;
p.r = 10;
p.vr = 0;
p.x = OX;
p.y = OY;
if(i != max - 1){
p.next = new Particle();
p = p.next;
}
}
}
private function enterframeHandler(e:Event):void
{
update();
}
private function onClick(e:MouseEvent):void
{
_canvas.lock();
_canvas.fillRect(new Rectangle(0, 0, 465, 465), 0xFFFFFF);
_canvas.unlock();
init();
}
private function update():void {
var sh:Shape = new Shape();
var g:Graphics = sh.graphics;
var ang:Number;
var ax:Number;
var ay:Number;
var rr:Number;
var anga:Number;
var px:Number;
var py:Number;
var r:Number;
var ran:Number;
var p:Particle = first;
var cnt:uint = 0;
_canvas.lock();
g.lineStyle(1,0xFF0066);
while(p){
cnt++;
if(p.r > 400){
p = p.next;
continue;
}
ran = Math.random();
if(ran < 0.1){
p.vang = 0;
p.vr = V;
}else if(ran < 0.2){
p.vang = -V * (1-p.r/400);
p.vr = 0;
}else if(ran < 0.3){
p.vang = V * (1-p.r/400);;
p.vr = 0;
}else if(ran < 0.304 && amax < OBJ_MAX){
var newP:Particle = new Particle();
newP.ang = p.ang;
if(p.vang == 0) newP.vang = 0;
else newP.vang = (Math.random() < 0.5)?-1:1;
newP.r = p.r;
if(p.vang == 0) newP.vr = 1;
else newP.vr = 0;
newP.x = p.x;
newP.y = p.y;
newP.next = p.next;
p.next = newP;
}
r = p.ang + p.vang;
p.r = p.r + p.vr;
g.moveTo(p.x,p.y);
ang = Math.PI/180 * r;
ax = p.r * Math.cos(ang);
ay = p.r * Math.sin(ang);
rr = Math.sqrt(ax * ax + ay * ay);
anga = Math.PI/180 * (r - (r - p.ang) / 2);
px = rr * Math.cos(anga);
py = rr * Math.sin(anga);
g.curveTo(px+OX, py+OY, ax+OX, ay+OY);
p.x = ax+OX;
p.y = ay+OY;
p.ang = r;
p = p.next;
}
if(TF){
if(_vr < 8) _vr += _vr/30;
if(_sr < 800)_sr = _sr + _vr;
g.beginFill(0xFF0000,0.2);
g.drawCircle(OX,OY,_sr);
g.endFill();
g.beginFill(0x000000,1);
g.drawCircle(OX,OY,_sr/2);
g.endFill();
}
_canvas.draw(sh);
g = null;
sh = null;
_canvas.unlock();
amax = cnt;
trace(cnt);
}
}
}
class Particle
{
public var ang:Number;
public var vang:Number;
public var r:Number;
public var vr:Number;
public var x:Number;
public var y:Number;
public var next:Particle;
}