100,000 Particles forked from: 250,000 Particles
じゃぶじゃぶ
アクティブ時：マウスの位置で動きが変わります。
非アクティブ時：マウスに関係なくジャブジャブします。
@author jc at bk-zen.com
/**
* Copyright bkzen ( http://wonderfl.net/user/bkzen )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/9WuS
*/
// forked from bkzen's 250,000 Particles
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.BitmapDataChannel;
import flash.display.GradientType;
import flash.display.Graphics;
import flash.display.Shape;
import flash.display.Sprite;
import flash.display.StageQuality;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.geom.ColorTransform;
import flash.geom.Matrix;
import flash.geom.Rectangle;
import flash.utils.ByteArray;
import net.hires.debug.Stats;
/**
* じゃぶじゃぶ
* アクティブ時：マウスの位置で動きが変わります。
* 非アクティブ時：マウスに関係なくジャブジャブします。
* @author jc at bk-zen.com
*/
[SWF (backgroundColor = "0x000000", width = "465", height = "465", frameRate = "60")]
public class ParticleTest4 extends Sprite
{
private const NUM_PARTICLE: int = 100000;
private var bmp: Bitmap;
private var bmd: BitmapData;
private var first: Particle;
private var bmdRect: Rectangle;
private var mem: ByteArray;
private var colorTf: ColorTransform;
private var mxy: Particle;
private var isActivate: Boolean;
private var cnt: int;
public function ParticleTest4()
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e: Event = null): void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
//
stage.quality = StageQuality.LOW;
stage.scaleMode = StageScaleMode.NO_SCALE;
//
bmd = new BitmapData(465, 465, false, 0x000000);
var forceMap: BitmapData = new BitmapData(465, 465, false);
forceMap.perlinNoise(
116, 116, 2, Math.random() * 0xFFFFFF, false, true, BitmapDataChannel.RED | BitmapDataChannel.GREEN
);
bmp = new Bitmap(bmd, "auto", true);
addChild(bmp);
var prev: Particle = first = new Particle();
var p: Particle, i: int;
while (i++ <= NUM_PARTICLE)
{
p = new Particle();
p.x = Math.random() * 465;
p.y = Math.random() * 465;
var rg: uint = Math.random() * 0xCC + 0x33;
p.color = (rg << 16) | (rg << 8) | 0xFF;
prev.next = p;
prev = p;
}
bmdRect = bmd.rect;
mem = forceMap.getPixels(forceMap.rect);
i = 0;
prev = mxy = new Particle();
prev.x = 232 + Math.cos(i * Math.PI / 180);
prev.y = 232 + Math.sin(i * Math.PI / 180);
prev.y = ((prev.y >> 1) << 2) * 465;
prev.x = ((prev.x >> 1) << 2) + prev.y;
while ((i+=2) <= 360)
{
p = new Particle();
p.x = 232 + 210 * Math.cos(i * Math.PI / 180);
p.y = 232 + 210 * Math.sin(i * Math.PI / 180);
p.y = ((p.y >> 1) << 2) * 465;
p.x = ((p.x >> 1) << 2) + p.y;
prev.next = p;
prev = p;
}
p.next = mxy;
//colorTf = new ColorTransform(1, 1, 1, 1, -32, -16, -8);
colorTf = new ColorTransform(1, 1, 1, 1, -64, -32, -16);
addEventListener(Event.ENTER_FRAME, loop);
addChild(new Stats());
stage.addEventListener(Event.ACTIVATE, onActivate);
stage.addEventListener(Event.DEACTIVATE, onDeactivate);
mouseEnabled = mouseChildren = false;
}
private function loop(e:Event):void
{
var p: Particle = first, address: int, offset: int, b: Boolean = (cnt++ % 3 == 0);
if (b)
{
if (isActivate)
{
var mx: int = stage.mouseX, my: int = stage.mouseY;
if (mx < 0) mx = 0;
else if (mx > 465) mx = 456;
if (my < 0) my = 0;
else if (my > 465) my = 456;
offset = ((my >> 1) << 2) * 465 + ((mx >> 1) << 2);
}
else
{
mxy = Math.random() < 0.5 ? mxy.next : mxy;
offset = mxy.x;
}
}
bmd.lock();
bmd.colorTransform(bmdRect, colorTf);
while (p)
{
if (b)
{
address = ((p.y >> 1) << 2) * 465 + ((p.x >> 1) << 2) + offset;
p.vx = p.vx * 0.98 + (( mem[address + 1] - 128) * p.m);
p.vy = p.vy * 0.98 + (( mem[address + 2] - 128) * p.m);
}
p.x += p.vx;
p.y += p.vy;
if (p.x < 0) p.x += 465;
else if (p.x > 465) p.x -= 465;
if (p.y < 0) p.y += 465;
else if (p.y > 465) p.y -= 465;
bmd.setPixel(p.x, p.y, p.color);
p = p.next;
}
bmd.unlock();
}
private function onDeactivate(e: Event): void { isActivate = false; }
private function onActivate(e: Event): void { isActivate = true; }
}
}
class Particle
{
public var x: Number = 0, y: Number = 0;
public var vx: Number = 0, vy: Number = 0;
public var m: Number = Math.random() * 0.004 + 0.004;
public var color: uint = 0xFFFFFF;
public var next: Particle;
function Particle() { }
}