forked from: 点描で球体

綺麗なコッペパンみたいなのが出来上がります

by uwi 04 Feb 2010

• Forked from Susisu's 点描で球体
• Diff: 11
• Related works: 2
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// forked from Susisu's 点描で球体
//綺麗なコッペパンみたいなのが出来上がります
package {
	import flash.display.Sprite;
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.PixelSnapping;
	import flash.events.Event;
	public class dotcircle extends Sprite{
		private var bmpData:BitmapData=new BitmapData(465,465,false,0xffffff);
		private var stgBmp:Bitmap=new Bitmap(bmpData,PixelSnapping.AUTO,true);
		private var angle:Number;
		private var xpos:Number;
		private var ypos:Number;
		private var r:Number;
		private var i:uint;
		public function dotcircle(){
			addChild(stgBmp);
			addEventListener("enterFrame", loop);
		}
		private function loop(e:Event):void{
			bmpData.lock();
			for(i=0;i<100;i++){
				// 球面上等確率
				var z : Number = Math.random() * 400 - 200;
				var theta : Number = Math.random() * Math.PI * 2;
				var res : Number = Math.sqrt(200 * 200 - z * z);
				xpos = Math.cos(theta) * res + 465 / 2;
				ypos = Math.sin(theta) * res + 465 / 2;
				bmpData.setPixel(xpos, ypos, 0);
			}
			bmpData.unlock();
		}
	}
}