2023-10-08

[public] 312K views, 91.7K likes, dislikes audio only

Sebastian Lague

Let's try to convince a bunch of particles to behave (at least somewhat) like water.

Written in C# and HLSL, and running inside the Unity engine.

Source code:

https://github.com/SebLague/Fluid-Sim/tree/Episode-01

Next episode:

/youtube/video/kOkfC5fLfgE

If you'd like to support me in creating more videos like this, you can do so here:

https://www.patreon.com/SebastianLague

https://ko-fi.com/sebastianlague

Resources:

https://matthias-research.github.io/pages/publications/sca03.pdf

http://www.ligum.umontreal.ca/Clavet-2005-PVFS/pvfs.pdf

https://sph-tutorial.physics-simulation.org/pdf/SPH_Tutorial.pdf

https://web.archive.org/web/20140725014123/https://docs.nvidia.com/cuda/samples/5_Simulations/particles/doc/particles.pdf

Music:

https://github.com/SebLague/Misc-Project-Info/blob/main/Coding-Adventures/Fluid-Sim.txt

Chapters:

0:00 Intro

0:27 Gravity and Collisions

2:31 Smoothed Particles

3:55 Calculating Density

7:53 The Interpolation Equation

11:58 Gradient Calculations

15:38 The Pressure Force

19:19 Trying to Make it Work...

22:05 Optimizing Particle Lookups

26:31 Spatial Grid Code

27:48 Position Predictions

30:32 Mouse Force

33:22 Artificial Viscosity

36:46 Pressure Problems

39:51 Bugs

41:06 Parallel Sorting

43:22 Some Tests and Experiments

44:47 The Third Dimension

47:23 Outro