Struct polys::circle::Circle

pub struct Circle {
    pub radius: f64,
}

Struct that represents a circle.

Fields

radius: f64

Implementations

impl Circle

pub fn new(r: f64) -> Circle

Returns a new Circle from given radius r.

Examples

let circle = polys::Circle::new(5.0);

Trait Implementations

impl Debug for Circle

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Polygon for Circle

fn area(&self) -> f64

Gets the area of the Circle from its radius.

Examples

use crate::polys::Polygon;
let circle = polys::Circle::new(5.0);
let area = circle.area();
assert_eq!(area, (std::f64::consts::PI * 25f64) as f64);

fn peri(&self) -> f64

Gets the circumferance of the Circle from its radius.

Examples

use crate::polys::Polygon;
use core::f64::consts::PI;

let circle = polys::Circle::new(5.0);
let peri = circle.peri();
assert_eq!(peri, 10f64*PI);

fn angles(&self) -> Vec<f64>

Returns an empty vector.

Examples

use crate::polys::Polygon;
let circle = polys::Circle::new(5.0);
let angles = circle.angles();
assert!(angles.is_empty());