Screen class

The Screen class defines the interface required for a Robot Devastation in-game screen. Inheriting from this class allows the creation of different game screens. Currently, all implementations of game screens use SDL as graphics backend.

The main methods of a Screen are:

• init(): this method should be called before the Screen is set as current screen in the ScreenManager. It performs the resource loading and initialization.
• cleanup(): this method should be called to free all the resources reserved or loaded by the Screen before finishing the program.
• drawScreen(): performs all the required graphic operations to draw the screen graphical elements. A screen canvas is passed as argument to this method, whose type depends on the graphics backend being used.
• update(): updates the Screen contents after some displayed parameter has changed. Currently, several signatures are used as they are required by the corresponding Screen. An alternative implementation could use void * or templates to simplify the API, leaving a single update() method.

Mock Screen class

Simple Screen for testing that shows a funny image with a custom message. This message can be configured through the update()method.

Init Screen class

Screen to be shown when the Robot Devastation game is started (InitState). It is just a splash screen showing the Robot Devastation logo.

Game Screen class

This Screen is the main game screen. Shows the video stream of the robot's point of view. On top of it, the game HUD, including health, ammo and other players' info is drawn.

Dead Screen class

This `Screen is shown when the player dies. It shows the time the player has to wait until he is respawned.