ポインタに重なる曲線。

/**
 * Copyright pykgg476 ( http://wonderfl.net/user/pykgg476 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/mu0a
 */

// forked from pykgg476's 曲線。
package {
	import flash.display.Sprite;
	import flash.events.MouseEvent;

	public class DrawingCurves extends Sprite
	{
		private var x0:Number = 100;
		private var y0:Number = 200;
		private var x1:Number;
		private var y1:Number;
		private var x2:Number = 300;
		private var y2:Number = 200;
		
		public function DrawingCurves()
		{
			init();
		}
		
		private function init():void{
			stage.addEventListener(MouseEvent.MOUSE_MOVE,onMouseMove);
		}
		
		private function onMouseMove(event:MouseEvent):void{
			x1 = mouseX * 2 - (x0+x2) / 2;
			y1 = mouseY * 2 - (y0+y2) / 2;
			graphics.clear();
			graphics.lineStyle(1);
			graphics.moveTo(x0, y0);
			graphics.curveTo(x1,y1,x2,y2); 
		}
	}
}