forked from: forked from: MathGraphics1
重いので注意！
/**
* Copyright mabo99 ( http://wonderfl.net/user/mabo99 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/ov15
*/
// forked from paq's forked from: MathGraphics1
// forked from nbhd's MathGraphics1
// 重いので注意！
package
{
import flash.filters.GlowFilter;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
import flash.display.Bitmap;
import flash.display.Graphics;
import flash.display.BitmapData;
import flash.events.Event;
import flash.display.Sprite;
import net.hires.debug.Stats;
import flash.geom.Rectangle;
import flash.geom.Point;
/**
* @author NBHD
*/
[SWF(frameRate=60)]
public class MathGraphics1 extends Sprite
{
private var _circle:Particle;
private var _particleList:Array = [];
private const MAX:uint = 1000;
private var _bmd:BitmapData;
private var _bmp:Bitmap;
private var _colortransform:ColorTransform = new ColorTransform(1, 1, 1, 1, 1, 1, 1, -1)
private var _rect:Rectangle = new Rectangle(0,0,3,3);
private var _point:Point = new Point();
private var _particlebmd:BitmapData;
public function MathGraphics1()
{
addEventListener(Event.ADDED_TO_STAGE, _onAdded);
}
private function _onAdded(event:Event):void
{
removeEventListener(event.type, arguments.callee);
_circle = new Particle(5, 0xff0000,1);
//addChild(_circle);
_circle.x = stage.stageWidth / 2;
_circle.y = stage.stageHeight / 2;
_circle.mass = 1000;
_bmd = new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x000000);
_bmp = new Bitmap(_bmd);
addChild(_bmp);
for(var i:uint = 0; i < MAX; i++) {
_particleList[i] = new Particle(1, (Math.random()+1) * 0xffffff, 0.2);
//_particleList[i].blendMode = 'add';
//addChild(_particleList[i]);
_particleList[i].x = Math.random() * stage.stageWidth;
_particleList[i].y = Math.random() * stage.stageHeight;
_particleList[i].vx = 0;
_particleList[i].vy = 1;
_particleList[i].mass = 1;
//_particleList[i].filters = [new BlurFilter(2.5, 2.5), new GlowFilter(Math.random()*0xffffff, 0.7, 2, 2)];
}
_particlebmd = new BitmapData(5, 5, true, 0x00ffffff)
var sp:Sprite = new Sprite();
sp.filters = [new BlurFilter(2.5, 2.5), new GlowFilter( Math.random() - 0.5) * 0xffffff, 0.7, 2, 2)];
var g:Graphics = sp.graphics;
g.beginFill(0xFFFFFF);
g.drawCircle(2,2,1);
_particlebmd.draw(sp)
//addChild(new Bitmap(_particlebmd));
stage.quality = "low";
addEventListener(Event.ENTER_FRAME, _onEnterFrame);
//addChild(new Stats)
}
private function _onEnterFrame(event:Event):void
{
_bmd.lock();
for(var i:uint = 0; i < MAX ; i++) {
_particleList[i].x += _particleList[i].vx;
_particleList[i].y += _particleList[i].vy;
_gravitate(_particleList[i], _circle);
_point.x = _particleList[i].x;
_point.y = _particleList[i].y;
_bmd.copyPixels(_particlebmd, _rect, _point);
}
_bmd.colorTransform(_bmd.rect, _colortransform);
//_bmd.draw(root);
_bmd.unlock();
}
private function _gravitate(tg1:Particle, tg2:Particle):void
{
var dx:Number = tg2.x - tg1.x;
var dy:Number = tg2.y - tg1.y;
var dist:Number = dx * dx + dy * dy;
var force:Number = tg1.mass * tg2.mass / dist;
var rad:Number = Math.atan2(dy, dx);
var forceX:Number = force * Math.cos(rad);
var forceY:Number = force * Math.sin(rad);
var sumMass:Number = tg1.mass + tg2.mass;
tg1.vx += forceX * tg2.mass / sumMass;
tg1.vy += forceY * tg2.mass / sumMass;
tg2.vx -= forceX * tg1.mass / sumMass;
tg2.vy -= forceY * tg1.mass / sumMass;
}
}
}
import flash.display.Sprite;
internal class Particle
{
public var x:Number=0;
public var y:Number=0;
private var _vx:Number=0;
public function get vx():Number {
return _vx;
}
public function set vx(vx:Number):void {
_vx = vx;
}
private var _vy:Number=0;
public function get vy():Number {
return _vy;
}
public function set vy(vy:Number):void {
_vy = vy;
}
private var _mass:Number=1;
public function get mass():Number {
return _mass;
}
public function set mass(mass:Number):void {
_mass = mass;
}
public function Particle(r:Number = 1, c:uint = 0xFFFFFF, a:Number = 1):void
{
/*graphics.beginFill(c, a);
graphics.drawCircle(0, 0, r);
graphics.endFill();*/
}
}