Adding Parallax to the clouds for the Flutter Dino game.

cloud.dart

@override
Rect getRect(Size screenSize, double runDistance) {
  return Rect.fromLTWH(
      (location.dx - runDistance)  WORLD_TO_PIXEL_RATIO / 5,
      2 / 7  screenSize.height - cloud.imageHeight - location.dy,
      cloud.imageWidth.toDouble(),
      cloud.imageHeight.toDouble());
}