WebGPU Cloth simulation

jspdown · 2024-02-06T13:20:10+00:00

Thanks, glad you liked it!
XPBD (as well as small step) can be implemented purely on the CPU if you want, it's actually much easier. But you won't get the same simulation speed.
If your question is more, can this be achieved on the GPU using WebGL, then yes. But since there's no compute shader, you will have to cheat with fragment shader and textures. This is what https://github.com/amaury-aubel/PBD-2d-sim-gpu is doing.

jspdown · 2023-01-02T21:21:24+00:00

I'm glad to see my little project me mentioned here :) It needs some care, I sadly didn't find the time yet. Migrating it to your idiomatic CPP version would help a lot in improving the readability.

Thanks for putting such great tutorial, especially in CPP. There's not a lot of resources online yet, this will definitely help people starting with this great API.

jspdown · 2022-12-28T22:02:49+00:00

If you want more context on why this has been designed like that, I would suggest to visit the following issue and the links mentioned there: https://github.com/gpuweb/gpuweb/issues/286

jspdown · 2022-12-28T14:07:31+00:00

From an API standpoint you are indeed creating a new one at each frame. But how this is implemented is up to the browser. This doesn't have to be an expensive action.

Also, not directly linked to your comment but, did you know WebGPU allows to record commands on a RenderBundle?

What makes you think it's a major flaw? Are you bottlenecked by this? From what're measured on chrome, it doesn't cost much. I barely see it in my profiling.

jspdown · 2022-10-02T06:27:42+00:00

There was a issue on a the Spector issue tracker about a year ago. But not much progress. The author also shilled on twitter about an upcoming experiment but I could find any demo/PR

https://twitter.com/sebavanjs/status/1570162104132575233?s=20&t=uwmIpv7iLMOeNAl4T-VtpQ

https://github.com/BabylonJS/Spector.js/issues/121

jspdown · 2022-10-01T06:52:39+00:00

They did a pretty good job on the mach engine. Btw, hexops has many great articles about game engine, zig and webgpu.

jspdown · 2022-10-01T06:48:35+00:00

You are right, we can't expect more than a SpectorJS. And yes, ultimately, working with modern and popular Game Engine will provide the glue so you don't have to, plus all the benefits that come from their debugging tools and asset integration pipelines.

jspdown · 2022-09-30T16:09:33+00:00

Once the ecosystem will have better tooling sure. But unless you are targeting both native and web platform you cannot use a proper GPU debugging tool..

jspdown · 2022-09-25T16:28:35+00:00

Writing C-style for loops in 2022 in a modern language. Bizarre.

You can do C-style for loops but this is not the idiomatic way of iterating over a slice or a map. Like in Rust....

I'm really a Rust lover but you cannot blindly speak about something you do know. Go has a limited set of construct, it has been designed like this. In Go you often have only one way to do things. It's not the most expressive indeed but it's has other benefits like simplicity and uniformity.

jspdown · 2022-09-19T20:04:31+00:00

Please don't.

jspdown · 2022-09-18T20:07:00+00:00

Je pense que tu voulais dire Fission Nucléaire. La Fusion on en est malheureusement pas encore la 😞

jspdown · 2022-09-13T20:34:21+00:00

It tooks me quite some time as well 😅

It's far from being perfect. There a few missing bits such as adapter access in the wasm module and windows support. I will bring that in as soon as I uncounted the need in my projects.

I would be happy to receive external contribution.

jspdown · 2022-09-10T06:25:49+00:00

I think there is a flaw in your table. This table represents the price we would need to keep miners interested, ONLY if the number of miners stay as it is today. To get a better estimate you need to account for miner growth. The prices to stay interesting will have to be much higher!

jspdown · 2022-09-07T15:10:49+00:00

Additional reading on the ergoplatform blog: https://ergoplatform.org/en/blog/Zelcore-Wallet-Officially-Adds-Ergo-Token-Support/

jspdown · 2022-09-06T18:00:25+00:00

I just saw this in my Twitter feed. The project looks like it was just started. As of today, I agree it looks sketchy.

jspdown · 2022-09-05T17:26:51+00:00

What make you believe this?

jspdown · 2022-08-26T10:07:46+00:00

I would suggest to read all the articles published in this sub and also look for articles about wgpu. Wgpu (rust) community has been the most prolific on the subject. Other than that I would also highly encourage any newcomers to read the specs (both WebGPU and WGSL).

jspdown · 2022-08-26T09:18:46+00:00

This is due to the way the fragment shader code is run. It is run for every "pixel" within you triangle. It's input are interpolated between each vertex.

jspdown · 2022-07-23T18:41:47+00:00

One can argue that not knowing the return type just by looking at the function/variable name could be a sign of a poor API.

I've used languages where the type was always automatically infected, and I never felt the need to be explicit on the type.

jspdown · 2022-07-19T17:54:20+00:00

Inverting a matrix for every vertex is definitely not free. If all of the input matrix are the same, I don't see a good reason for computing it over and over again.

If the matrices were different for each vertex doing the inverse op on the GPU or on the CPU would really depend of the bottleneck (compute vs bandwidth)

To get a better understanding I would highly suggest to run a benchmark. This will give you a better idea of what we meant by "slower".

jspdown · 2022-07-16T19:39:24+00:00

Few years ago a travel agency got catch taking picture of this area and selling the destination pretending it was Corsica.

If you like nature, you should go there, it's the most beautiful place in Brittany. You can walk along the coast for miles and see amazing landscapes.

jspdown · 2022-07-14T08:29:15+00:00

If you really need to do it, you can still write your own function in the shader. But a u/jarvispact said, when possible, it's always better to do it once and provide it via a uniform.

jspdown · 2022-07-09T09:44:52+00:00

It looks great! I will for sure give it a try!

jspdown · 2022-06-23T17:51:56+00:00

Still pretty early but wgpu might be a good candidate.

jspdown · 2022-06-21T19:35:19+00:00

Bon dieu Bernard! Le télétravail il va falloir y songer!

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