vizfft

An imgui+webGL toy, visualizing FFT of plane waves.

Dependencies

0. Get https://nixos.org/download.html ($ sh <(curl -L https://nixos.org/nix/install) --daemon)
1. Get https://direnv.net/
2. Get https://github.com/nix-community/home-manager/ with programs.direnv.enable = true and programs.direnv.nix-direnv.enable = true
3. echo use nix > .envrc
4. direnv allow

Build native

cmake -B build -S . -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DBUILD_EMSCRIPTEN=OFF
cmake --build build/

Build WebGL

cmake -B build -S . -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
cmake --build build/
npx http-server build/ -c-1

Roadmap

• init: a bunch of copy-paste to bootstrap the cmake, glfw, imgui, and emscripten trivia; raii headers in their current form can obviously only be included once, or they won't link correctly
• build github-pages on a push to master
• patch the negative DeltaTime issue in firefox
• switch from GLFW to SDL just to feel the difference between the APIs
• fft in a separate thread, on a frequency lower than the framerate
• switching between glfw/sdl via policies?
• a shader to visualize the implicit periodic extensions of the image
• an option to visualize an implicitly zero-padded signal
• 1d signal