flip

Reimplements the algorithm explained by Matthias Müller in C, using SDL3 to render it.

[features]

• PIC-FLIP interpolation
• particle and velocity visualisation
• drift compensation based on density calculation
• particle separation using a hash grid
• all on CPU

[building]

cmake -H . -B build
cmake --build build

[usage]

Run the program with command ./ffs or potentially ./ffs.exe on Windows.

key	behaviour
[p]	show particles
[v]	show velocity field
[spacebar]	pause/resume

[dependencies]

• SDL3
  • package may be listed with -devel suffix
• C23 compliant compiler
• CMake

[credits]

• ChatGPT spotted a weight calculation error (which really should've been obvious)
• Ten Minute Physics