重力マウス（プチ軽量化：25万パーティクル）
リンクリストにしてみたけどそんなに速くない？？
_bmd.fillRect()を_bmd.setPixel()に変更。
sin(),cos(),atan2(),sqrt()を排除。
Add final class / mouseEnalbled = false by clockmaker
CJ Cat: Used vector instead of linked list.
/**
* Copyright cjcat2266 ( http://wonderfl.net/user/cjcat2266 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/91tI
*/
// forked from clockmaker's 重力マウス（プチ軽量化：10万パーティクル）
// forked from coppieee's 重力マウス（さらに軽量化してみた）
// forked from paq's forked from: 重力マウス（ちょっぴり軽量化してみた）
// forked from fumix's 重力マウス（リンクリストにしてみた）
// forked from undo's 重力マウス
// リンクリストにしてみたけどそんなに速くない？？
//_bmd.fillRect()を_bmd.setPixel()に変更。
//sin(),cos(),atan2(),sqrt()を排除。
// Add final class / mouseEnalbled = false by clockmaker
// CJ Cat: Used vector instead of linked list.
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.geom.ColorTransform;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.utils.ByteArray;
import net.hires.debug.Stats;
[SWF(frameRate='60', width='465', height='465', backgroundColor='0x0')]
import flash.utils.Dictionary;
public class Main extends Sprite {
private var _bmp:Bitmap;
private var _bmd:BitmapData;
private var _bmdRect:Rectangle;
private var _colorTransform:ColorTransform = new ColorTransform(0.6, 0.7, 0.96, 1.0);
private const _maxNum:int = 250000; //50万パーティクルでも45fpsぐらいでる
private var _cnt:int = 0;
private const _particleData:Vector.<Number> = new Vector.<Number>(_maxNum * 4, true);
public function Main() {
if(stage) init(null);
else addEventListener(Event.ADDED_TO_STAGE, init);
return;
}
private function init(evt:Event):void {
removeEventListener(Event.ADDED_TO_STAGE, init);
this.stage.align = StageAlign.TOP_LEFT;
this.stage.scaleMode = StageScaleMode.NO_SCALE;
this.stage.quality = "low";
this.stage.frameRate = 120;
this.mouseEnabled = false;
this.mouseChildren = false;
_bmd = new BitmapData(465, 465, false, 0x000000);
_bmp = new Bitmap(_bmd);
addChild(_bmp);
this._bmdRect = _bmd.rect;
var i0:int, i1:int, i2:int, i3:int;
i0 = 0;
while (i0 < _maxNum) {
i1 = i0;
i2 = ++i1;
i3 = ++i2;
i3++;
_particleData[i0] = Math.random() * 465 >> 0;
_particleData[i1] = Math.random() * 465 >> 0;
_particleData[i2] = 0;
_particleData[i3] = 0;
i0 = ++i3;
}
addChild(new Stats());
addEventListener(Event.ENTER_FRAME, onEnter);
}
private function onEnter(evt:Event):void {
var gravPoint_x:Number = mouseX;
var gravPoint_y:Number = mouseY;
//var n:Node = _first;
var calc:Boolean = _cnt % 4 == 0;
this._bmd.lock();
var i0:int, i1:int, i2:int, i3:int;
i0 = 0;
while (i0 < _maxNum)
{
i1 = i0;
i2 = ++i1;
i3 = ++i2;
i3++;
// 4回に1回ぐらいの処理に
if(calc){
var diff_x:Number = gravPoint_x - _particleData[i0];;
var diff_y:Number = gravPoint_y - _particleData[i1];
var acc:Number = 200 / (diff_x * diff_x + diff_y * diff_y);
var acc_x:Number = acc * diff_x;
var acc_y:Number = acc * diff_y;
_particleData[i2] += acc * diff_x;
_particleData[i3] += acc * diff_y;
}
_particleData[i0] += _particleData[i2];
_particleData[i1] += _particleData[i3];
_particleData[i2] *= 0.96;
_particleData[i3] *= 0.96;
if(calc)
{
if (_particleData[i0] > 465)
_particleData[i0] -= 465;
else if (_particleData[i0] < 0)
_particleData[i0] += 465;
if (_particleData[i1] > 465)
_particleData[i1] -= 465;
else if (_particleData[i1] < 0)
_particleData[i1] += 465;
}
this._bmd.setPixel(_particleData[i0] >> 0, _particleData[i1] >> 0, 0xffffff);
i0 = ++i3;
}
this._bmd.colorTransform(this._bmdRect, this._colorTransform);
this._bmd.unlock();
_cnt++;
}
}
}