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use crate::geometry::vec::Vec2d;
use std::fmt;
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Direction {
North,
NorthEast,
East,
SouthEast,
South,
SouthWest,
West,
NorthWest,
}
impl fmt::Display for Direction {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use Direction::*;
let s = match self {
North => "N",
NorthEast => "NE",
East => "E",
SouthEast => "SE",
South => "S",
SouthWest => "SW",
West => "W",
NorthWest => "NW",
};
f.write_str(s)
}
}
impl Direction {
pub fn is_diagonal(&self) -> bool {
use Direction::*;
match self {
NorthEast | SouthEast | SouthWest | NorthWest => true,
_ => false,
}
}
pub fn as_vec(&self) -> Vec2d {
use Direction::*;
match self {
North => Vec2d::new(0, -1),
NorthEast => Vec2d::new(1, -1),
East => Vec2d::new(1, 0),
SouthEast => Vec2d::new(1, 1),
South => Vec2d::new(0, 1),
SouthWest => Vec2d::new(-1, 1),
West => Vec2d::new(-1, 0),
NorthWest => Vec2d::new(-1, -1),
}
}
pub const ALL: [Direction; 8] = [
Direction::North,
Direction::NorthEast,
Direction::East,
Direction::SouthEast,
Direction::South,
Direction::SouthWest,
Direction::West,
Direction::NorthWest,
];
}
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