skywind3000/mini3d
Free3D Software Renderer in 700 Lines !!
FreeFree tier
About skywind3000/mini3d
A 3D software renderer tutorial written in C, focusing on how to implement a fixed-function pipeline software renderer. The core code is only 700 lines but includes complete features such as texture mapping, depth buffering, perspective correction, clipping, and more. No third-party dependencies, single-file implementation. Designed for educational purposes to demonstrate 3D graphics rendering fundamentals. Includes both Chinese and English documentation.
Key Features
Single file implementation (mini3d.c) with no third-party dependencies
Standard D3D coordinate model with World/View/Projection matrices
CVV clipping support
Texture support up to 1024x1024
Depth buffering for correct occlusion
Perspective-correct texture mapping and color fill
Accurate polygon edge coverage calculation
Supports texture fill, color fill, and wireframe rendering modes
Detailed comments in code for learning
Simple lighting and bilinear interpolation (contributed by community)
Pros & Cons
Pros
- Educational: clear, concise code with detailed comments
- Self-contained: single C file, no external dependencies
- Covers essential rendering features in minimal code
- MIT licensed for free use and modification
- Active community with 2.3k stars and 506 forks on GitHub
- Includes both Chinese and English documentation
Cons
- No performance optimizations (intentionally for clarity)
- Fixed-function only, no programmable pipeline or shader support
- Only supports Windows compilation with GCC/MinGW or MSVC
- No GPU acceleration, purely CPU-based software rendering
- Documentation primarily in Chinese; English readme is brief
Best For
Educational tool for learning 3D software rendering fundamentalsDemonstrating fixed-function pipeline concepts in computer graphics coursesTutorial for implementing a software rasterizer from scratchFoundation for further graphics programming exercises and homeworkReference implementation for understanding GPU-accelerated rendering equivalents
FAQ
What is mini3d?
mini3d is a 3D software renderer tutorial written in C, with 700 lines of code that demonstrates fixed-function pipeline rendering including texture mapping, depth buffering, clipping, and perspective correction.
What are the system requirements?
Windows with GCC (MinGW) or MSVC compiler. No third-party libraries are needed.
What rendering features does it support?
It supports texture fill, color fill, wireframe modes, depth buffering, perspective-correct texture mapping, CVV clipping, and optionally simple lighting and bilinear interpolation.
Is mini3d optimized for performance?
No, it is intentionally unoptimized for educational clarity. Performance improvements are left as exercises for learners.