flash on 2010-2-20

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

package {
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            graphics.lineStyle(10, 0x77FFD700, 1);
            graphics.drawCircle(200,200,50);
            DrawCircle2();
            DrawCircle3();
        }

        public function DrawCircle2(){
        		graphics.beginFill(0x00ffff);
        		graphics.lineStyle(2, 0x0000ff);
        		graphics.moveTo(200+100, 300);
        		for(var d:int = 0; d < 360; d++ ){
        			var radian:Number = d * Math.PI / 180;
        			graphics.lineTo(	200 + 100 * Math.cos(radian),
        							300 + 100 * Math.sin(radian));
        		}
			graphics.endFill();
        }
        
        public function DrawCircle3(){
        		var centerX:Number = 100;
        		var centerY:Number = 200;
        		var r:Number = 50;
        		
        		graphics.lineStyle(2, 0xFF0006);
        		graphics.moveTo(centerX+r, centerY);

        		// 8つの弧をつなげる(時計回り?)        		
        		graphics.curveTo(r+centerX,							//control point x
        						Math.tan(Math.PI/8)*r+centerY,     	//control point y
        						Math.sin(Math.PI/4)*r+centerX,		//anchor x
        						Math.cos(Math.PI/4)*r+centerY);		//anchor y

        		graphics.curveTo(Math.tan(Math.PI/8)*r+centerX,
        						r+centerY,
        						centerX,
        						r+centerY);

        		graphics.curveTo(-Math.tan(Math.PI/8)*r+centerX,
        						r+centerY,
        						-Math.cos(Math.PI/4)*r+centerX,
        						Math.sin(Math.PI/4)*r+centerY);
        						
        		graphics.curveTo(-r+centerX,							//control point x
        						Math.tan(Math.PI/8)*r+centerY,     	//control point y
        						-r+centerX,
        						centerY);		//anchor y

        		graphics.curveTo(-r+centerX,							//control point x
        						-Math.tan(Math.PI/8)*r+centerY,     	//control point y
        						-Math.cos(Math.PI/4)*r+centerX,
        						-Math.sin(Math.PI/4)*r+centerY);		//anchor y
        						
        		graphics.curveTo(-Math.tan(Math.PI/8)*r+centerX,
        						-r+centerY,
        						centerX,
        						-r+centerY);

        		graphics.curveTo(Math.tan(Math.PI/8)*r+centerX,
        						-r+centerY,
        						Math.cos(Math.PI/4)*r+centerX,
        						-Math.sin(Math.PI/4)*r+centerY);
        						
        		graphics.curveTo(r+centerX,
        						-Math.tan(Math.PI/8)*r+centerY,
        						r+centerX,
        						centerY);
        }
    }
}