r/Simulated • u/matigekunst • 4d ago

Proprietary Software 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..

Edit:

Resources:

Ten Minute Physics

Eric Arnebäck's blog

Vivace

XPBD paper + earlier PBD paper from Macklin

288 Upvotes

97% Upvoted

20 comments sorted by

43

u/TheGaz 4d ago

TRABAMPOLINE

2

u/not4u2see 3d ago

TRAMAPOLINE!!!

17

u/FluxRender 4d ago

I'm curious how the idea to create something like this came about, haha

5

u/matigekunst 4d ago

I can't post it here due to the music. But here's an even better version

3

u/Mr_Zoovaska 2d ago

Probably the AI slop version that was doing the rounds a month or two ago

11

u/StaticBeat 4d ago

Chat is this real?

-1

u/pensivefool 3d ago

haha sometimes

2

u/itsabeautifulworld 4d ago

Tramampoline

1

u/Majvist 3d ago

This is fucking hilarious to me for some reason.

1

u/Basil_9 3d ago

hell yeah this is what i'm here for

1

u/CrumbCakesAndCola 4d ago

why is called a trampoline anyway

1

u/dkyguy1995 3d ago

He's the giant Bunny tht makes ALL OF ThE RULES 

1

u/Gotu_Jayle 3d ago

There were bunnies that were jumping on a trampoline

1

u/naorunaoru 2d ago

I understood that reference!

1

u/dascobaz 2d ago

Anyone else remember the jumping sheep screensaver where they would keep jumping higher and higher until they exploded on impact?

2

u/Artj1 4d ago

r/shittysimulated

2

u/dtwhitecp 4d ago

it really treads the line, and I'm here for it

0

u/matigekunst 3d ago

I'm considering making a deep dive on how this works on the GPU. I love 10 minute papers but it isn't immediately obvious from his videos how to implement XPBD on the GPU. I already did a video on Gauss-Seidel in the context of Poisson Solvers, but I'm wondering if there's any appetite for physics solvers