Sonic Battle (GBA) Renderer Series

(Click image to view the animated version)

Here are the entries in this ongoing series. The articles without a hyperlink are planned but haven’t been released yet.

1. Intro
2. Rendering on the GBA (overview)
3. Small detour: palette shifting
4. Capabilities and limitations of Sonic Battle’s renderer
5. The big picture
6. Camera and tilemaps
7. Walls
8. Walls sorting
9. Inverted walls
10. 45-degree angle walls
11. Sprites
12. Drop shadows
13. Culling
14. The Escher Sandwich
15. Appendix: Oryol framework
16. Appendix: Notes

You can try the WebAssembly demo.

All the source code (in C++) is contained in this repository.

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