static bool BackgroundLargerThanScreen(SpriteMover mover, CameraWorldWrapper camera)
{
float cameraArea = camera.GetScreenDimsInWorldCoords().magnitude;
var backgroundDims = mover.Dimentions;
return(backgroundDims.magnitude > cameraArea);
}
public HorizontalTilingBackground(Camera camera, SpriteMover spriteMover, SpriteMover spriteCopyMover)
{
if (!SpriteMoverDimsEqual(spriteMover, spriteCopyMover))
{
throw new ArgumentException("backgrounds must have equal sizes");
}
_cameraWorldWrapper = new CameraWorldWrapper(camera);
if (!BackgroundLargerThanScreen(spriteMover, _cameraWorldWrapper))
{
throw new ArgumentException("background must be larger than screen (in world units)");
}
_bgMover = spriteMover;
_copyBgMover = spriteCopyMover;
// place the one copy of bg at the center of the camera, the other tiled to the left
_bgMover.MoveCenter(_cameraWorldWrapper.Position);
TileSpriteToTheLeft(_bgMover, _copyBgMover);
}
