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This is a good tutorial, but it's important to note that scanline rasterizers are not how GPUs (or even high-performance SIMD software implementations) work. In

• Hydraulix989 10y ago
  The way I saw it was that the tutorial was more of a "roll your own software renderer" tutorial; it diverges quite heavily from what actual hardware accelerators do.
• tluyben2 10y ago
  It takes a lot of mental pain for me to make that step still. I think in old 3D and then someone derive shaders. It works but it is a painful process. Then again, for now it is nothing more than a hobby anyway.
• deleted 10y ago
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• exDM69 10y ago
  You're absolutely right about scanline rasterizers and GPUs, but scanline rasterization is very interesting historically. Most of the 1990s pre-GPU software renderers did scanline rasterization, for example Quake and Thief had a pure software renderer. Before GPUs, perspective correct texture mapping was the holy grail of 3d graphics because CPUs of the time were not fast enough to do all the divisions for each pixel, and lots of clever tricks were invented to work around this limitation. It's a bit of a shame that this article does not cover it, perhaps there's a part 2 in progress. Here's a quick write up about Thief's engine https://nothings.org/gamedev/thief_rendering.html https://nothings.org/gamedev/thief_rendering.html I've seen a similar piece on Quake but I can't find it now.