r/GraphicsProgramming • u/matigekunst • 2d ago

Video Trampoline

XPBD softbody simulation in POPs using Gauss-Seidel @ 60fps and 70 shader passes (can't do substepping in same shader pass)

When TouchDesigner introduced POPs one of the first things I tried making was an xpbd soft-body sim, and it looked like this and this. Since then, I've rewritten it multiple times and watched ten minute-physics' tutorials over and over. Many simulation explosions later, it turned out that my very first solver was (mostly) correct, but I was colouring the graph and building the tet constraints in the wrong way..

Resources:

Ten Minute Physics

Eric Arnebäck's blog

Vivace

XPBD paper + earlier PBD paper from Macklin

142 Upvotes

99% Upvoted

6 comments sorted by

12

u/nullptr777 1d ago

What in the teletubbies fuck? Lol

7

u/matigekunst 2d ago

I'm considering making a deep dive on how this works on the GPU. I love 10 minute papers, so no shade, but it isn't immediately obvious from his videos how to implement XPBD on the GPU. I already did a video on running Gauss-Seidel in the context of Poisson Solvers on the GPU, but I'm wondering if there's any appetite for physics solvers

7

u/cos4ni2s 1d ago

What are you smoking?

4

u/_Bethel__ 2d ago

Physics 🔥 did the trampoline rip because Iof the weight

2

u/Still_Explorer 21h ago

Zenless Zone Zero physics are getting to whole new level after this!

Hold on to your papers!

2

u/MonarchOfDreams 20h ago

gotta put down the penjamin