Struct polys::tri::Tri

pub struct Tri {
    pub side1: f64,
    pub side2: f64,
    pub side3: f64,
}

Struct that represents a triangle.

Fields

side1: f64

side2: f64

side3: f64

Implementations

impl Tri

pub fn new(s1: f64, s2: f64, s3: f64) -> Tri

Returns a new Tri from given sides s1, s2, s3.

Examples

let tri = polys::Tri::new(24.0, 30.0, 18.0);

Trait Implementations

impl Debug for Tri

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

Formats the value using the given formatter.

impl Polygon for Tri

fn area(&self) -> Option<f64>

Gets the area of the Tri from its sides.

Examples

use crate::polys::Polygon;

let tri = polys::Tri::new(24.0, 30.0, 18.0);
let area = tri.area().expect("Is none");
assert_eq!(area, 216.0);

fn peri(&self) -> Option<f64>

Gets the perimeter of the Tri from its sides.

Examples

use crate::polys::Polygon;

let tri = polys::Tri::new(24.0, 30.0, 18.0);
let peri = tri.peri().expect("Is none");
assert_eq!(peri, 72.0);

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

Returns the a vector of three angles in radians such that angles[0] is the angle opposite side1, angles[1] is the angle opposite side2, and angles[2] is the angle opposite side3.

Examples

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

let tri = polys::Tri::new(24.0, 30.0, 24.0);
let ang = tri.angles().expect("Is none");
assert_eq!(ang[0]+ang[1]+ang[2], PI);
assert_eq!(ang[0], ang[2]); //iso tri

let tri = polys::Tri::new(12.0, 19.0, 8.0);
let ang = tri.angles().expect("Is none");
assert_eq!(ang[0]+ang[1]+ang[2], PI);
 
let tri = polys::Tri::new(12.0, 12.0, 12.0);
let ang = tri.angles().expect("Is none");
assert_eq!((ang[0]+ang[1]+ang[2]) as f32, PI as f32);