flash on 2012-7-18

/**
 * Copyright Gleb.Panteleew ( http://wonderfl.net/user/Gleb.Panteleew )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/8pHj
 */

package {
    import flash.text.TextField;
    import flash.geom.Point;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            var tf:TextField = new TextField()
            tf.height = 500;
            tf.width = 500;
            tf.appendText(worldToTilePos(46.555,38.5235,11));
            addChild(tf);
        }
        public function worldToTilePos(lon:Number, lat:Number, zoom:int){
            var p:Point = new Point();
            p.x = ((lon + 180.0) / 360.0 * (1 << zoom)); 
            p.y = ((1.0 - Math.log(Math.tan(lat * Math.PI / 180.0) + 1.0 / Math.cos(lat * Math.PI / 180.0)) / Math.PI) / 2.0 * (1 << zoom));
            return p;
        }
 
        public function tileToWorldPos(tile_x:Number, tile_y:Number, zoom:int) {                
            var p:Point = new Point();
            var  n:Number = Math.PI - ((2.0 * Math.PI * tile_y) / Math.pow(2.0, zoom));
            p.x = ((tile_x / Math.pow(2.0, zoom) * 360.0) - 180.0);
            p.y = (180.0 / Math.PI * Math.atan(Math.sin(n)));
            return p;
            }
    }
}