Stages system

Description

The stages system is designed around stage objects. Stage object are containers that can be automatically inspected and run by the Stages subsystem. Only one stage can be active at any given moment, and it could represent a level, or a user interface, like e.g. a title screen.

Stages

A stage is a container for game objects. The stages system inspects the active stage in every iteration of the game loop. The most important objects in the stage are

• Backdrop: a backdrop serves as an image buffer that is automatically used to restore rectangles that were obscured by BOBs. Very simple if you have single screen setups.

• Tilemap(s): this could also be a background, or one or several tilemaps could complement a backdrop to build the background

• Active BOBs and Sprites: The movable and animated objects that are drawn. The stages subsystem will also perform collision detection on the active objects

• Invisible objects: Those are only there for collision detection to create invisible walls or obstacles.