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#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Cardinal {
North,
South,
West,
East,
}
impl Cardinal {
pub fn to_string(&self) -> &'static str {
match self {
Self::North => "north",
Self::South => "south",
Self::West => "west",
Self::East => "east",
}
}
pub fn turn_cw(&self) -> Self {
match self {
Self::North => Self::East,
Self::South => Self::West,
Self::West => Self::North,
Self::East => Self::South,
}
}
pub fn turn_ccw(&self) -> Self {
match self {
Self::North => Self::West,
Self::South => Self::East,
Self::West => Self::South,
Self::East => Self::North,
}
}
pub fn dir(&self) -> glam::Vec3 {
match self {
Self::North => glam::Vec3::new(0.0, 1.0, 0.0),
Self::South => glam::Vec3::new(0.0, -1.0, 0.0),
Self::West => glam::Vec3::new(-1.0, 0.0, 0.0),
Self::East => glam::Vec3::new(1.0, 0.0, 0.0),
}
}
pub fn offsets(&self) -> (i32, i32) {
match self {
Self::North => (0, 1),
Self::South => (0, -1),
Self::West => (-1, 0),
Self::East => (1, 0),
}
}
pub fn angle(&self) -> f32 {
match self {
Self::North => 0.0,
Self::South => std::f32::consts::PI,
Self::West => std::f32::consts::PI / 2.0,
Self::East => 3.0 * std::f32::consts::PI / 2.0,
}
}
pub fn turn_by(&self, o: &Self) -> Self {
match o {
Self::North => self.clone(),
Self::South => self.turn_cw().turn_cw(),
Self::West => self.turn_cw(),
Self::East => self.turn_ccw(),
}
}
}
pub fn lerp(a: f32, b: f32, t: f32) -> f32 {
a + t.clamp(0.0, 1.0) * (b - a)
}
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