rasterizer

Parallel software rasterizer written in C++.

Performance

Above scene (~35k triangles) renders in 60fps at 1920 x 1080 resolution on AMD Ryzen 5 3600 CPU.

Features

• rendering with or without depth buffer
• drawing with or without index buffer
• programmable shaders (at compile time with C++ templates)
• multithreaded (each thread renders one vertical slice of the image)
• ability to specify viewport dimensions and offset (to render to only part of the image)
• loading meshes and textures
• sutherland-hodgman and front triangle clipping
• configurable alpha blending
• configurable depth test (less, more, never, always, ...)
• configurable texture sampling (wrapping mode, minification and magnification filters)
• configurable face culling (clockwise, counter clockwise, both, none)
• deffered rendering is possible and accelerated with specialized method for screen quad rendering
• rendering to screen or texture

Building

Clone the repository

git clone https://github.com/pwalig/rasterizer.git
cd rasterizer

Dependencies

SDL GLM, STB and Rapidjson

git submodule init
git submodule update --depth 1

Build

CMake

Project can be built with CMake.

Run the following.

cd examples/sdl_model_viewer/
mkdir build
cmake -S . -B build
cmake --build build 

to get release build with MSVC on Windows use:

cmake --build build --config Release

Visual Studio 2026

Project can be built with Visual Studio.

Just open examples/sdl_model_viewer/sdl_model_viewer.slnx and run.

Tested only on Visual Studio 2026 other versions might not work.