ssloy/tinyrenderer

★ 23,575C++Audience · developerComplexity · 3/5QuietLicenseSetup · moderate

Mindmap

mindmap
  root((tinyrenderer))
    What it does
      Teaches 3D rendering
      Builds from pixels up
      No graphics libraries
    Core concepts
      Line drawing algorithm
      Triangle rasterization
      Depth buffering
      Shading and textures
    Learning path
      10-20 hours total
      One lesson per concept
      Progressive complexity
    Use cases
      Game engine foundation
      Graphics API prep
      Understanding rendering
    Tech stack
      C++ language
      Math algorithms
      File output

mindmap root((tinyrenderer)) What it does Teaches 3D rendering Builds from pixels up No graphics libraries Core concepts Line drawing algorithm Triangle rasterization Depth buffering Shading and textures Learning path 10-20 hours total One lesson per concept Progressive complexity Use cases Game engine foundation Graphics API prep Understanding rendering Tech stack C++ language Math algorithms File output

Things people build with this

USE CASE 1

Understand the mathematical foundations of how 3D game engines render scenes to a screen.

USE CASE 2

Build conceptual knowledge before learning professional 3D APIs like OpenGL, Vulkan, or DirectX.

USE CASE 3

Learn rasterization techniques like line drawing, triangle filling, and depth testing from first principles.

Tech stack

C++Bresenham algorithmZ-bufferShadow mapping

Getting it running

Difficulty · moderate Time to first run · 1h+

Requires C++ compiler setup and understanding of graphics math concepts; no external dependencies but non-trivial compilation.

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

Tinyrenderer is a hands-on educational course that teaches you how 3D graphics actually work by building a renderer from scratch in about 500 lines of C++. The problem it solves is the steep learning curve of 3D graphics APIs like OpenGL, Vulkan, Metal, and DirectX, most beginners struggle because these APIs hide all the underlying math. This project shows you that math directly, before you use the abstractions. The course walks through each concept one lesson at a time: drawing lines using Bresenham's algorithm (a method for plotting straight lines on a pixel grid), filling triangles, figuring out which surfaces are in front of others (using a depth buffer called a z-buffer), handling cameras, applying shading and textures, and eventually adding shadow mapping and indirect lighting effects like ambient occlusion. The starting point is just a blank image where you can set individual pixel colors, every drawing feature gets built up from there. You would use this if you want to deeply understand how game engines and 3D software render scenes, or if you're preparing to learn a real 3D API and want the conceptual foundation first. Students typically spend 10 to 20 hours working through it. The output is a rendered image saved to a file, there is no interactive window. The code is written in C++ with no external graphics libraries required.

Copy-paste prompts

Prompt 1

Walk me through how Bresenham's line algorithm works and why it's used instead of just drawing a straight line mathematically.

Prompt 2

Explain how a z-buffer determines which 3D surfaces should be visible when they overlap on screen.

Prompt 3

Show me how to implement basic triangle rasterization to fill a 3D shape with color.

Prompt 4

How do shadow mapping and ambient occlusion add realism to a 3D rendered scene?

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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.