UI System

UI System will be done in two parts.

First part is the HUD stuff thats visible all the time. Player status, current weapon, map, etc, etc. This will be created with the SFML render and the Termbox render. Completely separated code.

The second part has some abstraction. The dialog windows, inventory selections, menus. For these some kind of generic state system is created. This state system is then rendered by the SFMLrender or the termbox.