Using the SFML views

Up until this point, we have only dealt with code that renders things within the boundaries of the window that's open. There hasn't been an instance where we needed the screen to move yet, which would be fine if we lived in the early days of the 80s, but games even a decade after that time were a lot more advanced. Take, for example, Super Mario Brothers, a classic side-scroller. Its genre alone pinpoints what our first game didn't have: scrolling. If the scrolling effect or any kind of movement, resizing or rotation of the screen is desirable, using the sf::View is necessary.

What is sf::View? It's a rectangle. That's it. If you have ever held your fingers in a rectangle shape to "frame" the world you're observing, you have created a view with your hands. By moving it, you are essentially moving through the scene beyond the cut-off point of the window. If you're still not "getting the picture," here's an illustration to lead you in the right direction:

The sf::View is...