3D Game Engine

A C++23 3D engine and interactive simulation built with raylib and Bullet Physics.

The project focuses on the systems behind a small game world: object ownership, rendering, physics, character control, pathfinding, NPC behavior, and shop interactions.

Highlights

• Dynamic navigation mesh generated from walkable world geometry.
• A* pathfinding with obstacle-aware route updates and path smoothing.
• State-driven NPC behavior for roaming, shopping, waiting, and leaving.
• Bullet-based collision and rigid-body integration behind a small physics abstraction.
• Humanoid character controller with movement, jumping, and body-part composition.
• raylib rendering with custom lighting shaders.
• Shared object management and storage systems using modern C++ ownership.

Architecture

src/
├── ai/             navmesh, pathfinding, NPCs, and behavior states
├── app/            application lifecycle
├── controllers/    player input and character control
├── entities/       humanoid entities
├── game/           high-level game state
├── objects/        world object hierarchy
├── physics/        Bullet integration
├── rendering/      raylib rendering
├── shop/           shelves, fruit, and shopping behavior
└── systems/        input and shader systems

The main abstractions are deliberately separated: AI code queries the navigation representation, game objects own world behavior, and the physics layer hides Bullet-specific setup from the rest of the engine.

Build

Requirements:

• a compiler with C++23 support;
• CMake 3.10 or newer;
• raylib;
• Bullet Physics.

git clone https://github.com/Radu028/game-engine.git
cd game-engine
cmake -S . -B build
cmake --build build -j
./build/GameProject

Package-manager paths for raylib and Bullet may need to be exposed through CMAKE_PREFIX_PATH on macOS.

Controls

• WASD or arrow keys — move
• mouse — control the camera
• Space — jump

License

MIT