forked from: forked from: flash on 2009-8-19

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

// forked from hacker_kuukuu's forked from: flash on 2009-8-19
// but now it's gone too far from it...
package {
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest():void {
        		var i:uint;
        		var kame:LineDrawer = new LineDrawer();
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		
        		kame.North();
			kame.Teleport(100);
			
         	kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		kame.Turn(144);
        		kame.Walk(100);
        		
        		kame.West();
        		kame.Teleport(100);
        		for ( i = 0; i < 20; ++i ){
        			kame.Walk(80);
        			kame.Turn(126);
        		}

        		addChild(kame);
     	}
    }
}
import flash.display.Sprite;
class LineDrawer extends Sprite{
	private var x0:int = 240;
	private var y0:int = 240;
	private var theta:Number = 90*Math.PI/180;
    public function LineDrawer(){
        graphics.lineStyle(2,0x000000);
        graphics.moveTo(x0,y0);
    }
    public function Teleport(length:Number):void {
    		if (length >= 0) {
    			x0 = Math.round( x0 + length*Math.cos(theta) );
    			y0 = Math.round( y0 + length*Math.sin(theta) );
    			graphics.moveTo(x0,y0);
    		}
    }
    public function Walk(length:Number):void {
    		if (length >= 0) {
    			x0 = Math.round( x0 + length*Math.cos(theta) );
    			y0 = Math.round( y0 + length*Math.sin(theta) );
    			graphics.lineTo(x0,y0);
    		}
    }
    // change direction (alpha) degree clockwise.
    public function Turn(alpha:Number):void {
    		theta += alpha*Math.PI/180;
    		while (theta >= Math.PI*2) {
    			theta -= Math.PI*2;
    		}
    		while (theta < 0) {
    			theta += Math.PI*2;
    		}
    }
    // set direction (UP)
    public function North():void {
    		theta = 270*Math.PI/180;
    }
    // set direction (RIGHT)
    public function East():void {
    		theta =  0*Math.PI/180;
    }
    // set direction (LEFT)
    public function West():void {
    		theta = 180*Math.PI/180;
    }
    // set direction (DOWN)
    public function South():void {
    		theta =  90*Math.PI/180;
    }
}