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Enter The Ualg

A 2D top-down shooter built in Java from scratch as a university project. Theme and architecture were self-directed.

Implementation

  • Custom game engine: layer-based collision detection, transform system
  • Component pattern for game objects (behaviour, collider, transform, shape all separate)
  • State machine pattern for entity AI (patrol, chase, attack, knockback, stunned, dead)
  • Observer pattern for event-driven UI updates (health, ammo, score)
  • Factory pattern for room and weapon construction from JSON config
  • Singleton pattern for engine, camera, and UI instances
  • Custom JSON parser built without external libraries
  • Geometry module with polygon/circle intersection, ray casting for point-in-polygon

Stack

Java, Swing, JUnit

Testing

Unit tests covering geometry primitives, colliders, transforms, game objects, and layer groups

Documentation

Full Javadoc generated for all packages and UML diagrams covering the full class hierarchy

Requirements

Java 11 or higher

Running the game

From the project root:

javac -d src/out $(find src -name "*.java" ! -path "*/Tests/*")
java -cp src/out Main

Running the tests

javac -cp lib/junit-platform-console-standalone-1.12.1.jar -d src/out $(find src -name "*.java")
java -jar lib/junit-platform-console-standalone-1.12.1.jar execute --class-path src/out --scan-class-path