Fluid Simulation and Web Assembly

[nicholasjbs]

https://ehayes.page/posts/fluid/

[leephillips]

When on this page almost all my keyboard shortcuts stopped working and it was difficult to close the page. I consider this a form of malware.

[pekim → leephillips]

The page appears to install global keydown/up handlers that swallow all key events. And it also disables the browser's context menu.

[nighthawk454 → leephillips]

It’s running flawlessly on my iPad mini. Perhaps the site isn’t the issue.

[zamadatix → nighthawk454]

I don't think they mean the performance or anything like that, rather the site literally requests to eat all keyboard events (among other things). To even open dev tools on a completely different system I had to do it via the browser menu as right click, Ctrl+Shift+I, and f12 were set to be globally consumed for input on the site instead of just certain needed events in the app area.

[ellellem]

Fluid simulation is more suited to GPU (because particles/molecules...) than CPU. What am I missing? SIMD maybe? Not sure...

[s-macke → ellellem]

WebAssembly programming is simply easier than GPU programming.

My game here [0] 6 years ago uses WebAssembly with a Finite Difference approach for the fluid part. Nowadays, fixed-width SIMD [1] is standardized and supported in the browser. But I don't now any website using it.

I have tried porting it to WebGPU. It is much more complicated and only Chrome supports it right now. To get fluid simulation working via the older standard WebGL is more like a hack.

[0| https://github.com/s-macke/Interplanetary-Postal-Service

[1] https://github.com/WebAssembly/simd/blob/master/proposals/si...

[pornel → s-macke]

https://wgpu.rs can emulate newer APIs on WebGL2. It's really nice to work with.