flash on 2014-9-19

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

package {
    import flash.display.Sprite;
    import flash.text.*;
    public class FlashTest extends Sprite {
        private var tf:TextField = new TextField();
        public function FlashTest() {
            // write as3 code here..
            tf.text = "test";
            tf.text = "";
            tf.width=400;
            tf.height=400;
            addChild(tf);
            test1();
        }
        
        private var r:Number = 6378.137;
        private function test1():void{
            var b:int = 10;
            var c:Number = 90/b;
            for(var i:int=0;i<10;i++){
                var a:Number = i*10;
                var len:Number = func2(a);
                tf.appendText("lat:"+a.toString()+"  "+Math.floor(len).toString()+"km\n");
            }
            a = 89.99;
            len = func2(a);
            tf.appendText("lat:"+a.toString()+"  "+Math.floor(len).toString()+"km\n");

        }
        
        //緯度を指定し一周の長さを取得する(km)
        public function func2(n:Number):Number{
            if(90<=Math.abs(n))return 0;
            const r:Number = 6378.137;//赤道半径(km)
            var rad:Number = (n/90)*Math.PI/2;
            var len:Number = (r*Math.cos(rad))*Math.PI*2;
            return len;
        }

        
    }
    

}