raster

A software rasterizer written to better understand the inner workings of the GPU and its rendering pipeline.

Features

• .obj model loading
• Perspective-correct interpolation
• Near-plane clipping
• Blinn-Phong shading
• UV texture mapping
• Shadow mapping with PCF
• Bloom effect

Showcase

Scene	Description
	Z-buffer with models at varying depth
	Stanford bunny colored with vertex normals

Usage

Build:

cmake -B build -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
cmake --build build -j

Render a scene:

./build/rasterizer <bunny|depth_demo|dragons> [--frames N]

Convert frames to gif:

pip install -r scripts/requirements.txt
python3 scripts/frames_to_gif.py

Roadmap

• SIMD optimization (AVX2)

References

Papers

• Pineda, J. (1988). A Parallel Algorithm for Polygon Rasterization

Articles and Tutorials

• LearnOpenGL
• tinyrenderer
• Scratchapixel
• Fryzek Concepts: Rasterizing Triangles
• songho.ca
• OGLDev

Documentation

• Khronos OpenGL Refpages