While creating games with LimeJS you don’t have to think about the different screen sizes your players will be using. In the beginning of your game you just have to define the stage size and we will take care of that you game appears in maximum size on both HD monitors and on an iPhone. This enables you to use fixed positions and sizes, much like in Flash. When the display size or device orientation changes you don’t have to recalculate your game elements positions as your stage is still same size, although it appears visually bigger on the screen.
This all happens automatically for screen sizes. But what should you use when your element itself transforms or elements parent element is resized?
AnchorPoint - handling element’s own tranforms.
AnchorPoint lets you define the location in your element that is most important for your game object. When you position your element this is the point that is put on the exact position you give in ‘setPosition()’. The element rotates around this point when you use ‘setRotation()’. If you scale an element this location remains in its position and everything around it is scaled. All children of the element are by default positioned by the parent element’s anchor point….