gravity-sim

A simulation of a bunch of particles and gravitational pull between them.

Configuration

Configuration must be done via CLI:

gravity-sim

USAGE:
  gravity-sim [OPTIONS]

Performs a simple gravity simulation and renders the output to a GIF.

OPTIONS:
      --steps <VALUE>               The number of steps (frames) to simulate
      --fps <VALUE>                 The number of frames per second
      --cache <VALUE>               The folder to cache individual frames of the replay
      --output <VALUE>              The output GIF path
      --sim-width <VALUE>           The simulation/frame width
      --sim-height <VALUE>          The simulation/frame height
      --particle-count <VALUE>      The number of particles to spawn
      --particle-size <VALUE>       The particle size used in rendering
      --particle-mass-min <VALUE>   The minimum random bound for particle mass
      --particle-mass-max <VALUE>   The maximum random bound for particle mass
      --threads <VALUE>             The number of threads to use. If null, it uses the number of CPU cores
      --time-scale <VALUE>          How many times faster to make the simulation than real time (good option if you're impatient)
  -h, --help                        Show this help output.
      --color <VALUE>               When to use colors (*auto*, never, always).

Building from scratch

If you get any errors about libraries not found, you probably just need to install libc, libwebp, and libgcc. All of these assume you have done git clone https://github.com/HyperCodec/gravity-sim && cd gravity-sim (or something of the sort).

Linux

On Linux, it's as simple as:

cd renderer
cargo build --release
cd ..
zig build

Windows

Kind of broken, same thing as linux but move renderer/target/release/renderer.dll to zig-out/bin after the cargo build --release step. If that doesn't work you can docker build ..

Mac

Not sure (I don't own a mac). It's probably like Linux but if that doesn't work there's always docker build ..