Coding Adventure: Simulating Fluids

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. Support my work (and get early access to new videos and source code) on Patreon or Nebula * Patreon: https://www.patreon.com/SebastianLague * Nebula: https://go.nebula.tv/sebastianlague Source code: * GitHub: https://github.com/SebLague/Fluid-Sim/tree/Episode-01 Check out my other fluid simulation videos: https://youtube.com/playlist?list=PLFt_AvWsXl0dJrPelwdVSMVC_MDTYPJWn&si=Z5cOCDSI1aS4fe_C Credits and References: * https://matthias-research.github.io/pages/publications/sca03.pdf * https://web.archive.org/web/20250106201614/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