Writing Classes

Objective

Students must demonstrate the ability to create custom classes that extend base classes, implementing specialized behavior for game objects.

Evidence

Custom character classes extending base classes:

• Ghost.js - Extends Enemy class with AI pathfinding behavior
• DeathBarrier.js - Extends Barrier class with collision-triggered death
• SpriteSheetCoin.js - Extends Coin class with sprite sheet animation

Implementation Details

These custom classes demonstrate:

• Proper inheritance from game engine base classes
• Constructor implementation with super() calls
• Method overriding for custom behavior
• Integration with the game engine’s update/draw cycle

Key Concepts

• Class declaration using extends keyword
• Single responsibility principle (each class handles one entity type)
• Polymorphism through method overriding
• Composition with game engine components