Four🍀bar

Four-bar is a simulator and a synthesizing tool for four-bar linkage mechanism.

```rust use four_bar::FourBar;

// Get the trajectory of the coupler point let path = FourBar::example().curve(360); ```

The synthesis function let you synthesize a four-bar mechanism by fitting target curve.

```rust use four_bar::{mh, syn};

let func = syn::FbSyn::fromcurve(curve, syn::Mode::Closed).res(res); let s = mh::Solver::build(mh::Rga::default(), func) .task(|ctx| ctx.gen == gen) .popnum(pop) .solve() .unwrap(); ```