Would you also like me to list 2–3 more features (e.g., shader debugging tips, downloadable example projects, or the math appendix)?
Each tutorial builds a working OpenGL program step by step, explaining every new function, shader concept, and math detail (like matrices or camera movement) right when it’s introduced. The PDF includes the complete source code for each stage, so you can compare your work, fix errors easily, and truly understand why something works — not just copy-paste. This makes the notoriously steep learning curve of modern OpenGL (4.5+) much more manageable for self-taught programmers.
Here’s a strong feature of Anton's OpenGL 4 Tutorials (PDF edition) that would appeal to a learner: