Silixel
tinygpus
Silixel | tinygpus | |
---|---|---|
1 | 3 | |
52 | 93 | |
- | - | |
- | 4.2 | |
over 1 year ago | 17 days ago | |
Verilog | Lua | |
BSD 3-clause "New" or "Revised" License | GNU General Public License v3.0 only |
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Silixel
tinygpus
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Perspective-Correct Interpolation
This is a fascinating topic, especially when considering how this was achieved back in the days. We now take it for granted, but this was not a simple feature to have in your game in 199x ( x<6 ;) ).
For anyone interested: I have a detailed write up on the topic here in the context of 1990s renderers https://github.com/sylefeb/tinygpus/tree/main?tab=readme-ov-... ; a video discussing texture mapping with a hardware twist https://youtu.be/2ZAIIDXoBis?si=MvQXH2ltqWmvFMdt&t=1072 ; and have a shadertoy to compare perspective correct texture mapping on/off https://www.shadertoy.com/view/ftKSzR
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Unreasonably effective – How video games use LUTs and how you can too
- actual lookup table generation: https://github.com/sylefeb/tinygpus/blob/498be1b803d0950328a...
Sine tables are also very typical, for animating things on screen or plain
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Running Quake on an FPGA (Custom MRISC32 CPU) [video]
Very, very impressive works, both MRISC32 and FuryGPU (which I just learned about, love the idea of a FPGA-retro-GPU that could go in a modern computer!). It's hard to overstate the amount of passion, care and technical expertise that go into such projects.
I'm the author of 'q5k' (Quake viewer in 5K LUTs) and so I wanted to say Hi to my fellow Quake-on-FPGA enthusiasts. Thanks for the mention, and looking forward to the next steps of your projects!
PS: Q5k is of course much, much slower (runs on a small $10 ice40 up5k FPGA), and only a viewer. The renderer is custom using fixed-point only. Unlikely I'll be ever able to run the full game at any decent speed, but I'm surely going to try :) For anyone interested, here's the repo of q5k and doomchip-onice: https://github.com/sylefeb/tinygpus