WebGPU-Based WiFi Simulator • Hacker News Board

Re: WebGPU-Based WiFi Simulator

#71

Post by [deleted] » Mon, Oct 21, 2024, 5:37 AM UTC

KingOfCoders wrote: post #68

"Sorry, WebGPU is not supported on your device" Firefox, Nvidia A. Why? B. What a bad error message

[deleted]

Re: WebGPU-Based WiFi Simulator

#72

Post by Woshiwuja » Mon, Oct 21, 2024, 5:56 AM UTC

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Re: WebGPU-Based WiFi Simulator

#73

Post by Woshiwuja » Mon, Oct 21, 2024, 5:58 AM UTC

missblit wrote: post #24

Bugs: #1 if you spam the "add a new source" button you eventually get a JavaScript exception logged to the screen due to an array with a fixed max size of 128 elements overflowing. #2 this could be graphics card or driver specific (I have an AMD card), but scrolling just right can can break the simulation due the the text boxes; for example by quickly paging up and down, or scrolling all the way to the bottom and the…

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Re: WebGPU-Based WiFi Simulator

#74

Post by faragon » Mon, Oct 21, 2024, 6:00 AM UTC

I was expecting here SDR radio processing: noise read from GPIO's passed to a web browser with a pipe, showing activity on all channels at once.

Re: WebGPU-Based WiFi Simulator

#75

Post by _flux » Mon, Oct 21, 2024, 6:04 AM UTC

soheil wrote: post #64

dankwizard wrote: post #57

Earlier quoted context omitted.

Did ChatGPT write that for you because it has missed the mark by 500 metres.

It's a sin + cos function.. you need an AI for that?

The point was that the implementation of this tool is not a sin+cos function. It's more like

  let newEz = Ez0[me] +  calcEzDiff(vec2u(id.x, id.y), dx, dy, aspect);

  let newEzAbove = Ez0[above] +  calcEzDiff(vec2u(id.x, id.y + 1), dx, dy, aspect);
  let newEzRight = Ez0[right] +  calcEzDiff(vec2u(id.x + 1, id.y), dx, dy, aspect);

  Hx1[me] = Hx0[me] - (uniforms.dt/mu0)*(newEzAbove - newEz) / dy;
  Hy1[me] = Hy0[me] + (uniforms.dt/mu0)*(newEzRight - newEz) / dx;

  Ez1[me] = newEz;

  let localDelta = delta[me];
  let fac = 1 + uniforms.omega * uniforms.dt * (delta[me] / eps[me] / 2);
  Ez1[me] = Ez1[me] / fac;
  Hx1[me] = Hx1[me] / fac;
  Hy1[me] = Hy1[me] / fac;

and then a bunch of other GPU code. You can find this with little effort from the bundle, if you care, by base64-decoding the Pt("xxx") parts.

Though I do imagine it indeed could be implementable with WebGL shaders, but I also wouldn't start a new compute-based on it, unless I had a particular need to support older systems. And this I say as a Firefox user..

Re: WebGPU-Based WiFi Simulator

#76

Post by pjmlp » Mon, Oct 21, 2024, 6:29 AM UTC

yjftsjthsd-h wrote: post #39

pjmlp wrote: post #37

Earlier quoted context omitted.

Only runs browser instances. Even Crostini is sandoxed in a way similar to WSL2.

User-facing apps are browser instances and VMs, and under that is a pretty normal userland. It's still a distribution of software on a Linux kernel. And for that matter, is Silverblue any less a Linux distro with its read-only root and apps in flatpak/distrobox? Are Qubes OS or Proxmox with everything in VMs?

People buying a Chromebook down at the mall will never see GNU userland.

Folks using Silverblue and Flatpak distributions get to use GNU userland.

Re: WebGPU-Based WiFi Simulator

#77

Post by pjmlp » Mon, Oct 21, 2024, 6:30 AM UTC

murderfs wrote: post #41

pjmlp wrote: post #36

Earlier quoted context omitted.

A JavaScript userspace juggling Chrome instances.

...no, it isn't? Even if you're claiming (incorrectly) that the window manager, etc. contain javascript, the same would apply to GNOME!

GNOME allows GNU userland to be used.

Re: WebGPU-Based WiFi Simulator

#78

Post by timkq » Mon, Oct 21, 2024, 7:27 AM UTC

I wonder if there is something like this but open-source, so I could customize this. I'm looking for a tool to solve UWB positioning (for indoor navigation) - to be able to know where to optimally place various UWB anchor points.

Re: WebGPU-Based WiFi Simulator

#79

Post by maho » Mon, Oct 21, 2024, 7:52 AM UTC

I need this, but for heatpump noise.

It's mostly broadband noise that can be simulated by simpler methods, but visualizing possible resonance patterns for the low-frequency emissions from the compressor (which typically runs at 20Hz, 40Hz, ..., 120 Hz) would be good to know.

Although I am not sure how the 2d simulation result carries over to the 3d world...

Re: WebGPU-Based WiFi Simulator

#80

Post by croon » Mon, Oct 21, 2024, 8:34 AM UTC

I think I clicked the link at the bottom to add new sources to the simulation a few times too many:

Unexpected Application Error!

offset is out of bounds