id-Software/DOOM-3-BFG
DOOM 3 BFG
This repository contains the C++ game source code for a single-player first-person shooter action game. It is a software implementation of the Id Tech 4 engine, designed for 3D rendering with a focus on real-time unified lighting and geometry.
The project enables the modification of core engine logic and rendering systems. It serves as a resource for classic game engine modification, first-person shooter development, and retro game preservation.
The engine utilizes a unified shader pipeline and stencil shadow volumes for lighting effects, alongside BSP tree spatial partitioning for visibility culling and collision detection. It employs a component-based entity system to manage game objects.
Features
- Game Source Code - Ships the original C++ source code for a commercial 3D game, enabling full engine modification.
- C++ Game Engines - Provides a high-performance game engine implemented in C++ for low-level system and memory control.
- First-Person Shooter Development - Provides a complete framework for developing and modifying first-person shooter combat mechanics.
- First-Person Shooter Engines - Implements a 3D rendering engine specifically architected for first-person shooter combat and lighting.
- Game Logic Modification - Enables the modification of an older game engine's core logic and rendering systems via its source code.
- Id Tech 4 Implementations - Provides a full software implementation of the Id Tech 4 engine with a focus on unified lighting.
- Game Programming - Provides a substantial C++ codebase for studying and practicing low-level systems programming in a game context.
- Entity Component Systems - Employs an entity component system to decouple game object data from behavior for flexible composition.
- Engine Source Modifications - Change core behavior and rendering systems by compiling and modifying the underlying source code.
- Action Games - Implements a native single-player action game focused on combat and exploration.
- Retro Game Preservation - Ensures the preservation of a classic game by providing source code that can be updated for modern hardware.
- Shadow Volume Renderers - Uses stencil shadow volumes to calculate real-time shadows via geometry extrusion and buffer masking.
- Binary Space Partition Trees - Implements binary space partitioning trees for efficient 3D visibility culling and collision detection.
- Unified Shader Pipelines - Implements a unified shader pipeline to achieve complex real-time lighting and material effects.
- First Person Shooters - Source code for a modern-era first-person shooter.
