Game Development Reference
In-Depth Information
Understanding scrolling
In this secion, we will go over how horizontal and verical scrolling work conceptually
and mathemaically.
Engage thrusters
In a horizontal scrolling game, the player sprite is always visible, but the non-player sprites
can move in and out of the stage. The non-player sprites in the Hunger Run game include the
background sprites (such as bricks) and interacive sprites (such as food items). Even when a
sprite moves in and out of the stage, it sill exists in the game space. In a 2D scrolling game,
the game space can be represented as 2D grids, which consists of 2D unit grids as shown in
the following screenshot. Each grid unit is the same size as the stage, 480 pixels in length (L)
and 360 pixels in width (W).
