A compute shader implementation of a jacobi iteration based fluid simulation as an Unreal Engine plugin.

This is based on the same principles in GPU Gems, Chapter 38 and uses many other implementations as reference for the other specifics.

This simulation is in 3D space using a default grid size of 64x64x32 voxels, though this is user configurable, and takes approximates 500 micro seconds on a 3060 laptop GPU. Note that this is also using multiple superfluous texture readbacks, so there are optimisations to make.

There are multiple sourcing types:
Fan - Velocity in a direction.
Wake - A moving object adds velocity in the direction of travel.
Explosion - A radial explosion.

The simulation outputs a velocity and density field which can both be used by other systems. The density field can be rendered using a heterogenous volume. Niagara PFX systems can easily read from the velocity field to advect particles, this is very cool!

Future optimisations include using the methods outlined here:
https://www.youtube.com/watch?v=i07q2LcvI3c
https://www.youtube.com/watch?v=_3eyPUyqluc