forked from: コレを煙にします
/**
* Copyright CoremindJP ( http://wonderfl.net/user/CoremindJP )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/frZM
*/
// forked from Kay's コレを煙にします
package {
import flash.display.*;
import flash.events.*;
import flash.geom.*;
[SWF(width=465,height=465,backgroundColor=0x000000,frameRate=30)]
public class Main extends Sprite {
private const SW:Number = stage.stageWidth;
private const SH:Number = stage.stageHeight;
private var hNum:uint = 50;
private var vNum:uint = 50;
private var noise:Texture;
private var smoke:Sprite;
public function Main():void {
noise = new Texture(hNum, vNum);
addEventListener(Event.ENTER_FRAME, xRun);
// 検証用
var bm:Bitmap = new Bitmap(noise);
addChild(bm);
// 煙になるかな？
smoke = new Sprite();
smoke.x = SW/2;
smoke.y = SH;
addChild(smoke);
}
private function xRun(e:Event):void {
// Noiseを動かして（Point値を更新）
noise.xDraw(1,1);
// Noiseから座標を取得して煙の祖片を描画
smoke.graphics.clear();
for (var v:uint = 0; v < 10; v++) {
var nX:Number = 0;
var nY:Number = 0;
smoke.graphics.lineStyle(0,0xffffff,0.2);
smoke.graphics.moveTo(nX,nY);
for (var h:uint = 0; h < 40; h++) {
var nColor:uint = noise.getPixel(v,h);
var colors:Array = toRGB(nColor);
nX += (colors[1]-128)/15;
nY += (colors[2]-128)/10 - 10;
smoke.graphics.lineTo(nX,nY);
}
}
}
private function toRGB(nColor:uint):Array {
var nB:uint = nColor & 0xff;
var nG:uint = (nColor >> 8) & 0xff;
var nR:uint = (nColor >> 16) & 0xff;
return ([nR, nG, nB]);
}
}
}
import flash.display.*;
import flash.geom.*;
class Texture extends BitmapData {
public var point:Point = new Point(0,0);
private var seed:uint = Math.floor(Math.random() * 10);
private var channels:uint = BitmapDataChannel.GREEN | BitmapDataChannel.BLUE;
public function Texture (w:uint=200, h:uint=200) {
super(w, h, true, 0xffffffff);
}
public function xDraw(pX:Number, pY:Number):void {
point.x += pX;
point.y += pY;
perlinNoise(40, 40, 4, seed, false, true, channels, false, [point]);
}
}