Mega Code Archive

 

Categories / Flash ActionScript / Animation

 

Change speed direction after hitting the boundary

package {      import flash.display.Sprite;      import flash.events.Event;      import flash.geom.ColorTransform;      import flash.geom.Rectangle;            public class Main extends Sprite {           public var speedX:int = 10;           public var speedY:int = -10;           public function Main() {                addEventListener(Event.ENTER_FRAME, onEnterFrame);                graphics.beginFill(0xFF, 1);                graphics.drawCircle(0, 0, 25);                graphics.endFill();                var colorTransform:ColorTransform = new ColorTransform();                colorTransform.color = Math.random()*0xFFFFFF;                transform.colorTransform = colorTransform;           }                      private function onEnterFrame(event:Event):void {                x += speedX;                y += speedY;                var bounds:Rectangle = getBounds(parent);                if (bounds.left < 0 || bounds.right > stage.stageWidth) {                     speedX *= -1;                }                if (bounds.top < 0 || bounds.bottom > stage.stageHeight) {                     speedY *= -1;                }           }      } }