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README.md

README.md

CarGame

This is a school project, with the aim, to provide a basic game in Java.
It was written in Java with Swing.

Sprites

Inheration Tree:

  • Object
    • Car
      • PlayerCar
      • EnemyCar
        • PoliceCar

The Object class represent Sprites, with a position, image and hitox. Car inhertis from Object and adds methods, for vertical- and horizontal movement/speed.
PlayerCar inherits from Car and implements additional propertys and methods, to controll the fuel of the PlayerCar and for KeyEvents, to controll the direction of the car movement.
EnemyCar also inherits from Car and implements additional methods, for automated lane changes and movement updates.
PoliceCar inherits from EnemyCar and adds extra hitboxes and methods, to avoid collisions with other obstacles

Hitboxes:

The Hitboxes of the Object class are by default the bounding recatangle of its image. It is possible, to generate pixel detailed hitboxes. For pixel detailed hitboxes, every pixel of the image is parsed and added to the hitbox (java.awt.geom.Area), if the pixel is not transparent (alpha of 0). If a path to a hitbox.ser file is given, the Object tries to read the hitbox (java.awt.geom.Path2D) and cast it to an Area. If the file doesn't exists, it is created (under res/hitbox).
There are extra hitbox.ser files for EnemyCar, PlayerCar, PoliceCar which are created at first startup and read in at following startups. Once they are read, they are saved in a static attribute as Area.

Game

Structure:

  • panel
    • GameBoard
    • PanelManager
    • Menu
    • LanguageListener
    • Listener _ ObstacleManager
  • StreetManager
  • ResourceBundleEx
  • MainWindow

In the GameBoard class, the gameloop is running. In the gameloop, all positions of the obstacles and cars are updated. Also it is checked, if the PlayerCar collides with any other obstacle. Also the repainting is done in the gameloop after every update.

The PanelManager manages all menus, declared in Menu and show/hide them when necessary.

The ObstacleManager manages all the obstacles and move all the stored sprites with only one method call (update(int height). Also it handles the generation of new obstacles (barriers, enemys, policecars, fueltanks).

The StreetManager stores multiple Objects with images of street lanes in a grid and move them with one speed, as if they are one big road. The StreetManager generates a matching count of horizontal and vertical street Objects, depending on the size of the panel and the size of the street Objects.

The LanguageListener and Listener are interfaces, which can get implemented in classes, which want's to receive the game state changes / signals. The LanguageListener only gets triggered, If the language was changed and updates all the UI components with text. The Listener interface, is for the game signals, and handle state changes, like "gameStarted" or instructions like "startGame".

The ResourceBundleEx give words, by key, in choosen language (IntelliJ IDEA).

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