Hacker News: hrydgard

New comment by hrydgard in "No Graphics API"

hrydgard — Wed, 17 Dec 2025 11:34:06 +0000

Well, it is what is done on several tiler architectures, and it generally works just fine. Normally your computations of the position aren't really intertwined with the computation of the other outputs, so dead code elimination does a good job.

New comment by hrydgard in "Shipping textures as PNGs is suboptimal"

hrydgard — Sun, 07 Sep 2025 13:28:36 +0000

BC1-3 are like that, but BC7 is far, far more complex. The search space is huge.

New comment by hrydgard in "Blender is Native on Windows 11 on Arm"

hrydgard — Wed, 13 Aug 2025 13:53:13 +0000

It works just fine and is natively ARM, since a year or so.

New comment by hrydgard in "A new PNG spec"

hrydgard — Wed, 25 Jun 2025 07:07:12 +0000

What about implementations? libpng seems pretty dead, 1.7 has been in development forever but 1.6 is still considered the stable version. Is there a current "canonical" png C/C++ library?

New comment by hrydgard in "First Boeing 787 Dreamliner Crash"

hrydgard — Thu, 12 Jun 2025 11:24:38 +0000

Parody account

New comment by hrydgard in "Show HN: Duolingo-style exercises but with real-world content like the news"

hrydgard — Tue, 01 Apr 2025 09:21:56 +0000

Great stuff!

Small UX thing: Make it so you can just click a word to fill in the next empty spot, instead of having to drag, similar to when building sentences in Duolingo. Especially when not on a touchscreen, having to drag is pretty painful and reduces accessibility.

New comment by hrydgard in "FFmpeg School of Assembly Language"

hrydgard — Sun, 23 Feb 2025 16:05:43 +0000

Function calls are very fast (unless there's really a lot of parameter copying/saving-to-stack) and if you can re-use a chunk of code from multiple places, you'll reduce pressure on the instruction cache. Inlining is not always ideal.

Talking to an App Store Review brick wall

hrydgard — Tue, 26 Nov 2024 19:43:04 +0000

Article URL: https://www.ppsspp.org/blog/stuck-in-app-store-review/

Comments URL: https://news.ycombinator.com/item?id=42249202

Points: 3

# Comments: 0

New comment by hrydgard in "How I failed to make a game: Raycasting on the GBA"

hrydgard — Thu, 17 Oct 2024 21:07:12 +0000

Not sure if you care at this point, given that you stopped working on project, but there's a better way to find the ray direction for each column than using sin/cos for every one, which will also get rid of the slightly warped look:

Calculate the two vectors from the camera at the very left and right of the screen (using your fov angles and sin/cos, that's fine). Then, to find the ray direction vectors for each column, interpolate linearly between your left and right direction vectors, and possibly normalize the resulting vectors if your ray walking algorithm requires it.

This will create a perspective that integrates tightly with sprites that you 3D project the usual way, and lines will stay straight lines.

New comment by hrydgard in "UE5 Nanite in WebGPU"

hrydgard — Thu, 05 Sep 2024 18:28:33 +0000

Pack Z and 32-bit color together into a 64-bit integer, then do an atomic min (or max with reversed Z) to effectively do a Z-query and a write really, really fast.

New comment by hrydgard in "Honey, I shrunk {fmt}: bringing binary size to 14k and ditching the C++ runtime"

hrydgard — Sun, 01 Sep 2024 12:38:45 +0000

What else would it possibly mean?

k is very common shorthand for kB, at least historically.

New comment by hrydgard in "ESP32-S3 has a few SIMD instructions"

hrydgard — Mon, 06 May 2024 11:01:21 +0000

Nice!

Could save a couple of cycles per iteration by preloading the shift amounts into several GPRs before entering the loop, instead of initializing them just before use.

New comment by hrydgard in "Eclipse: The Demo that Sold 3D to Nintendo"

hrydgard — Tue, 05 Dec 2023 12:04:17 +0000

I think "cover shooter mechanic" refers to ducking behind cover and a system for smoothly shooting from behind it like in Gears of War - or in Winback. This mechanic was not there in Wolfenstein 3D.

New comment by hrydgard in "Cities Skylines 2 runs with 20fps on an Nvidia RTX4090"

hrydgard — Thu, 26 Oct 2023 18:39:23 +0000

It's probably just a very good guess, since that's how it always goes.

New comment by hrydgard in "Accessible Palette: stop using HSL for color systems (2021)"

hrydgard — Tue, 29 Aug 2023 13:33:05 +0000

oklab might be an even better alternative to LCh:

https://bottosson.github.io/posts/oklab/

New comment by hrydgard in "Dolphin Emulator Progress Report: May, June, and July 2023"

hrydgard — Sun, 13 Aug 2023 20:08:08 +0000

Only the user mode part of the driver is replaced, the kernel interface is actually shared between the closed source and the open source driver. So it's just loaded like a DLL/.so and hooked up to the API.

New comment by hrydgard in "Vulkan Video Decoding"

hrydgard — Mon, 08 May 2023 08:32:05 +0000

You can have a Vulkan driver that only exposes a video decoder queue and no raster/compute/copy queues, not a problem.

New comment by hrydgard in "My favorite C compiler flags during development"

hrydgard — Sun, 30 Apr 2023 16:36:24 +0000

valgrind runs on your unmodified binary, it's asan that needs a separate build.

New comment by hrydgard in "Bay 12 Games has made $7M from the Steam release of Dwarf Fortress"

hrydgard — Thu, 02 Feb 2023 10:55:34 +0000

What dropoff? The newest number is on top.

(Though yeah, there will be a dropoff for sure, it's just not visible here).

New comment by hrydgard in "Clip control on the Apple GPU"

hrydgard — Mon, 22 Aug 2022 16:32:48 +0000

There is no good reason to flip the flag dynamically at runtime and apps just don't do that, so flushing the pipeline should be perfectly fine, even in an implementation of the clip control extension.