Software rasterizer in C
No OpenGL, no Vulkan. A framebuffer in memory, some maths, and a PNG at the end.
lab
Things I've built
Engines, shader demos, tools and open source. Built to understand how graphics really works.
// engines
Building now
FuzX
My game engine in C++. OpenGL and DirectX on Windows, and now running on Android. No Unity, no Unreal. I'm building it in public, one episode at a time.
In the browser
WebGL engine
A rendering engine for the web, written in TypeScript on top of WebGL.
// build logs
Projects with a full write-up. See the result, then read how it works.
MSAA, from scratch
Same rasterizer, now with multisample anti-aliasing. Up to 16 samples per pixel.
Object picking in OpenGL
Click on the screen, select the object under the cursor. Sounds trivial. It is not.
PS1 wobble
The wobbly models and swimming textures were hardware limits. Here is how to fake them.
Texture space shading
What if all the shading happened in UV space instead of screen space?
// demos
Shader and rendering experiments. Click any one to play it here.
The Jungle Book
A 7 minute demo about Mowgli and Raksha, the wolf mother who raised him. Fixed-function OpenGL and Win32.
Nindiya
A delivery boy's journey through modern India. A team demo with the Shader Group, in WebGL and GLSL ES.
Dynamic Bharat
A Win32 and OpenGL demo.
Physically based rendering
PBR materials and lighting.
Tessellation shaders
Subdividing geometry on the GPU.
Batched grass
Batched rendering of grass blades.
Spline editor
A spline editor inside my 3D engine.
Spritesheet animations
Sprite-based animation in my C engine.
Font rendering
A font rendering system.
God rays
Volumetric light shafts.
Fog
Distance fog in a shader.
Lighting
Real-time lighting in WebGL.
// tools
Free and in your browser. I built them because I needed them.
// open source
All repos ↗
rgbguy / software-rasterizer
A minimal triangle rasterizer in C that writes a PNG. The base for the MSAA post.
C rgbguy / GlitchWorkA lightweight, cross-platform image editor in C++ and OpenGL.
C++ rgbguy / OpenGL-CatmullRomSplineCatmull-Rom splines in OpenGL.
C++ rgbguy / AzgarThe classic Snake game, rebuilt in OpenGL and C++. Runs on Windows, macOS and Linux.
C++ rgbguy / webgpu-triangleA starter template for WebGPU.
JavaScript rgbguy / Assembly101Experiments in x86 assembly.
x86 AssemblyNeed something like this built?
Engines, rendering features, performance work. I take on graphics and R&D projects.
Work with me