So I updated "Water" ! The sim is running in a single CPU thread. It should work faster now, rendering optimized & WebAssembly SIMD support! But seems like the speedup with wasm is only limited because of the heavily scattered memory access pattern 😇

context: also the source code updated. e.g. you can see the wasm part here:

a SINGLE CPU thread? How is this so well optimized?

Well, I tried hard! See also:

自分もいま MLS-MPM の AVX2 化に取り組んでいるので，参考になります！ このシミュレーションについて，いくつか知りたい点があります．

The velocity needs to be constant wrt to frame time. The sim shouldn't slow down on higher particle count, the FPS should just lower.

Ideally so, but in this sim the spatial resolution is fixed and instead the view is scaled down. So physically you "just have more particles" in higher settings and nothing else is changed (except the boundaries). Have to subdivide time too when aim to a pure resolution increase.

Impressive! One question: Is it on purpose that it does not really behave like water? Can one tweak parameters to make it more realistic? OK, two qustions: Can it be extended to 3D? Thanks!

It's more like "ocean" than water considering all the parameters set. Maybe that's why you feel it a bit off. It's not on purpose, and increasing gravity would make it more realistic, at an additional computation cost. For the second question: Yes!

dope

insane! so cool, well done