ulam crate

ulam spiral lib for rust.

• Takes a Coord( x, y ) and returns a value in the spiral.
• Takes a value and returns a Coord(x,y).

• Can also be used to produce pictures of ulam spirals with primes colored.

  Important Notes

• this current starts with 0 in the middle and starts to the right. rust Coord { x: 1, y: 0, } This Coord is equal the value of 1 if passed to the

Example usage:

```rs let mut ulam_points = HashMap::new();

for x in -201..201 { if x % 10 == 0 { println!("{x}"); } for y in -201..201 { let c = Coord::new(x, y); let a = ulam::getulampoint(&c);

    ulam_points.insert(
        a.value,
        c
    );
}

}

let c = Coord::new(20000, 20000); let a = ulam::getulampoint(&c);

println!("{}", a.value); println!("{:?}", ulam_points[&55]);

ulam::ulamspiralimg::generate(1000, 1_000) .unwrap() .save("./result.png"); ```