Flux

A real-time GPU-accelerated particle sandbox. Designed a way so there's no processing done on the CPU. All particles are stored in a few float32 textures, updated and rendered using a bunch of fancy shaders. So it's blazingly fast! Simulating a few million particles at 60 FPS is a boring task even for my ancient GPU, a modern one will likely handle tens of millions.

Features

• As GPGPU as it gets: no work on the CPU and no data transfers from/to the main memory
• Fancy post-processing: high quality multi-pass bloom filter, ACES tonemapping, etc.
• Perceptually uniform color spaces: CIELAB, CIELUV, Oklab, etc.
• Lots of simulation and rendering settings to mess around with

Instructions

NOTE: must be compiled with Zig 0.12, tested only on Windows and WSL2

# build and run:
zig build run

# build in release mode:
zig build --release

# dependencies to build/run on linux:
apt install libglfw3 libglfw3-dev

Made with

• https://github.com/ziglang/zig
• https://github.com/Dav1dde/glad
• https://github.com/glfw/glfw
• https://github.com/ocornut/imgui
• https://github.com/cimgui/cimgui
• https://github.com/nothings/stb

Useful resources

• https://docs.gl/
• https://open.gl/
• https://learnopengl.com/
• https://khronos.org/opengl/wiki/
• https://github.com/fendevel/Guide-to-Modern-OpenGL-Functions