Learn OpenGL, extensive tutorial resource for learning Modern OpenGL

Original Article ↗ Hacker News Discussion ↗

A popular OpenGL tutorial site is praised as an exceptionally clear way to learn real‑time graphics fundamentals such as coordinate systems, shaders, lighting, and rendering pipelines. Commenters are split on whether OpenGL is still worth starting with in 2026: some argue it’s deprecated, poorly designed, and should be replaced by Vulkan, WebGPU, Metal, or DirectX, while others say its simpler model and rich learning material make it ideal for beginners before moving to lower‑level APIs. The thread also highlights alternative learning paths, from software renderers and university-style courses to higher-level libraries and translation layers that map OpenGL calls onto newer backends.

Overall view of LearnOpenGL

  • Widely praised as an exceptionally good, practical Modern OpenGL tutorial.
  • Especially valued for:
    • Explaining boilerplate and setup clearly.
    • Walking through vertex/fragment shaders, transforms, lighting, PBR, HDR, shadows, etc.
  • Some say it’s “the Bible” for beginner graphics programming, more accessible than books like Real-Time Rendering or Physically Based Rendering.
  • Minor criticism: some setup examples jump between slightly different configurations, which can complicate debugging.

Is OpenGL still worth learning?

  • Pro-OpenGL:
    • Considered the easiest way to start hardware-accelerated 3D; fewer concepts and less boilerplate than Vulkan/DX12.
    • Good for teaching fundamentals: coordinate systems, meshes, projections, shading, multi-pass rendering.
    • Still runs on major desktops (including via translation layers like Metal/ANGLE/Zink), and many hobby/indie engines still use it.
  • Anti-OpenGL:
    • Deprecated and version-locked on macOS/iOS; no new features and missing modern capabilities (e.g., SSBOs on Apple).
    • API is called confusing and badly designed (global state, VAOs, GLSL-in-driver quirks, driver bugs).
    • Several posters argue it’s “obsolete” and recommend Vulkan, WebGPU, or Metal instead, especially for long-term or career use.

Alternatives and bindings

  • Vulkan/DX12:
    • Seen as powerful but extremely verbose and hostile to beginners; lots of boilerplate (e.g., memory allocation, pipelines).
    • Some claim Vulkan is “needlessly overengineered” and worse than OpenGL from a usability perspective.
  • WebGPU:
    • Suggested as a modern, cross‑platform alternative; closer to Metal/DX12, more structured, better error messages.
    • Criticized for being behind OpenGL 4.6 in features and for inheriting some outdated Vulkan design decisions and lacking mature tools.
  • Metal:
    • Recommended for macOS as the only serious native option; learning curve higher, materials less beginner‑friendly.
  • Other layers/libs:
    • Mentioned: Sokol, SDL3 GPU, RLGL, OpenTK, LWJGL, ANGLE, Zink, MoltenVK; opinions mixed on reliability and feature coverage.

Learning paths and pedagogy

  • Several recommend:
    • Start with OpenGL (or a software renderer) to internalize core graphics concepts.
    • Then move to Vulkan/DX12/Metal/WebGPU once fundamentals are solid.
  • Others argue one should skip legacy APIs entirely and learn directly on newer ones, or even start from compute (CUDA) or software rendering tutorials.