bare c implementation of a legendary glsl shader which shows what can be done with (SDF)[https://en.wikipedia.org/wiki/Signed_distance_function] and a dash of divine sparkle. the code is fast enough to drive decent led matrices up to 64*64 from no-fpu microcontollers, e.g. Pimoroni Unicorn series (UART, SPI, I2C or UDP). by default runs a local ascii emulation via canonical mode (fast gpu-aware terminal emulator is recommended, e.g. alacritty).
$ clone && cd && make
//:~