This program is about D2Q9 Lattice Boltzmann Method: See : https://en.wikipedia.org/wiki/Lattice_Boltzmann_methods

It's a pet project in order to use V language: https://vlang.io/

The simulation is single threaded, probably buggy and should not be used for serious things. It's very sensible to tau parameter that should be carefully set. This parameter is related to fluid viscosity, and is set so that the fluid speed doesn't exceed a speed limit that breaks simulation. Too narrow passage (speed increased) may reach this limit.

profiles files MUST be of the same size of defined width and weight and should be 8bits per pixels. Every non zero value is considered as an obstacle.

to compile the program from within source directory:

v -prod .

or if you want gcc (already installed) as compiler:

v -prod -cc gcc .

SDL module must be installed: https://vpm.vlang.io/packages/sdl and post install script executed, see link.

The simulation is quite slow, but would you like to slow it down, just uncomment the sdl.delay(...) in file.

This program is released under MIT license.