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Ono-Sendai

839 karma · joined September 6, 2012

my blog: http://www.forwardscattering.org/
submissionscomments
Ono-Sendai··on Scientists observe Einstein's gravity in the quantum world
That's a very deep question. In some sense no, in some sense yes. I would say on the deepest level, no, they are not blocked.
Ono-Sendai··on So you want to learn physics (second edition, 2021)
Hi, fair enough. I've thoroughly immersed myself in this stuff enough that I sometimes don't realise people aren't as familiar with the concepts and jargon. I'm going to write another article that I think should help about the Klein gordon equation, at some point.

See my last article here https://forwardscattering.org/page/Intuitive%20Quantum%20Ele... Although it is a bit technical. next one will start simpler.

Ono-Sendai··on So you want to learn physics (second edition, 2021)
Are you saying my statement is very abstract? or down to earth?
Ono-Sendai··on Ask HN: What Are You Working On? (July 2026)
Adding MCP support to the open-source metaverse Substrata (https://substrata.info/)
Ono-Sendai··on So you want to learn physics (second edition, 2021)
energy = frequency of angular rotation in the complex plane of a wavefunction.
Ono-Sendai··on Maxwell's Equations Were Discovered [video]
ok? well, textbooks can be wrong or misguided.
Ono-Sendai··on Maxwell's Equations Were Discovered [video]
Nah, special relativity is a consequence of magnetism.
Ono-Sendai··on Maxwell's Equations Were Discovered [video]
Interesting, I need to look into Maxwell's original formulation with the vortices. You can write electrodynamics in terms of small spinning elements: https://forwardscattering.org/page/Intuitive%20Quantum%20Ele...
Ono-Sendai··on Local, CPU-Friendly, High-Quality TTS (Text-to-Speech) with Kokoro
Also from this: https://terminator.fandom.com/wiki/Kokoro
Ono-Sendai··on Connections in Math: the two kinds of random
Kolomogorov complexity as an objective measure of the information contained in a string just doesn't work. It depends entirely on the language used for the program, and for any string, in some language, the complexity is zero.

See https://forwardscattering.org/page/Kolmogorov%20complexity

And no, the invariance theorem doesn't save you.

Ono-Sendai··on Midjourney Medical
Wonderful stuff, good job Midjourney.

An AI can be trained on body scans to detect diseases, tumours etc. Ideally this can be trained on real scans with real diseases but you could also train on synthetic data (synthetic bodies and/or synthetic diseases).

You can also focus ultrasonic waves to destroy (vaporise or cook) diseased tissue.

Ono-Sendai··on A Decade of Slug
So now the algorithm is patent-free, and the vertex and fragment shaders are open-sourced with the MIT license, what we presumably need is some open-source code to take Bezier curves from a font file (or from the loaded data from FreeType or whatever), and process them into the data format that Slug expects.

Also thank you to Eric Lengyel, I have had my eye on Slug for a while and wished it was open-source.

Ono-Sendai··on A Decade of Slug
Awesome, thanks.
Ono-Sendai··on A Decade of Slug
I was going to ask if Slug can be used as a general vector renderer. Or does it assume limits on e.g. number of curves/paths per area that are typical of fonts?
Ono-Sendai··on Faster asin() was hiding in plain sight
Here's my fast acos, which I think can be converted to an asin: https://forwardscattering.org/post/66
Ono-Sendai··on Analytic Fog Rendering with Volumetric Primitives (2025)
For simple models (constant incoming radiance), you can indeed just add the optical depths from the different fog 'layers'. (90% sure but the maths is easy to check anyway, see https://forwardscattering.org/post/72)
Ono-Sendai··on Analytic Fog Rendering with Volumetric Primitives (2025)
Coincidentally I just posted a blog post on fog rendering, in particular with exponential height fog, yesterday: https://forwardscattering.org/post/72
Ono-Sendai··on Aesthetics of single threading
Use a multithreaded blocking approach. Much nicer than async.
Ono-Sendai··on Ask HN: What are you working on? (February 2026)
Substrata: open-source metaverse: https://substrata.info/
Ono-Sendai··on OpenClaw is what Apple intelligence should have been
I haven't thought about it deeply. But I guess it's about allowing the model to easily distinguish the prompt from the conversation. Models seem to get confused with escaping, which is fair enough, escaping is very confusing. It's true that for the transformer architecture the prompt and conversation are in the same stream. However you could do something like activate a special input neuron only for prompt input. Or have the prompt a fixed size (e.g. a fixed prefix size). And then do a bunch of adversarial training to punish the model when it confuses the prompt and conversation :)
Ono-Sendai··on OpenClaw is what Apple intelligence should have been
They could be if models were trained properly, with more carefully delineated prompts.
Ono-Sendai··on A 40-line fix eliminated a 400x performance gap
"look, I'm sorry, but the rule is simple: if you made something 2x faster, you might have done something smart if you made something 100x faster, you definitely just stopped doing something stupid"

https://x.com/rygorous/status/1271296834439282690

Ono-Sendai··on What happened to WebAssembly
I use webassembly for Substrata (https://substrata.info/). It works pretty well, allows building a c++ app using OpenGL for the web.
Ono-Sendai··on Aliasing
When you have done enough C++ you don't need to fire up compiler explorer, you just use local variables to avoid aliasing pessimisations.

I also wrote about this a while ago: https://forwardscattering.org/post/51

Ono-Sendai··on Ruby website redesigned
I find this distasteful:

  cities  = %w[ London
              Oslo
              Paris
              Amsterdam
              Berlin ]
Do it properly with quotes you lazy people :)

EDIT: typical ruby (on rails) code: saves a few characters, breaks readily (Hint: consider "New Orleans")

Ono-Sendai··on No Graphics API
Relative to what? Relative to modern OpenGL with good driver support, not much probably. The big win is due to the simplified API, which is helpful for application developers and also driver writers.
Ono-Sendai··on Ask HN: What Are You Working On? (December 2025)
Substrata: https://substrata.info/

https://x.com/SubstrataVr

Open source metaverse. Just added rideable jetskis!

Written in C++ and OpenGL. Works on the web as well via Emscripten, WASM and WebGL.

Ono-Sendai··on Ask HN: What Are You Working On? (December 2025)
Neat idea. What is the controller latency like when using a mobile phone?
Ono-Sendai··on Ask HN: What Are You Working On? (Nov 2025)
Substrata - an open-source metaverse

https://substrata.info/

In particular hardware-accelerated video playback, and adding Portals.

Ono-Sendai··on NanoChat – The best ChatGPT that $100 can buy
not sure why you are being downvoted. That 'explanation' of Rayleigh scattering is just wrong.
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