use coord_2d::{Coord, Size};
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(u8)]
pub enum Orientation {
Original,
Clockwise90,
Clockwise180,
Clockwise270,
DiagonallyFlipped,
DiagonallyFlippedClockwise90,
DiagonallyFlippedClockwise180,
DiagonallyFlippedClockwise270,
}
pub const NUM_ORIENTATIONS: usize = 8;
use self::Orientation::*;
pub const ALL: [Orientation; NUM_ORIENTATIONS] = [
Original,
Clockwise90,
Clockwise180,
Clockwise270,
DiagonallyFlipped,
DiagonallyFlippedClockwise90,
DiagonallyFlippedClockwise180,
DiagonallyFlippedClockwise270,
];
impl Orientation {
pub(crate) fn transform_coord(self, size: Size, coord: Coord) -> Coord {
match self {
Original => coord,
Clockwise90 => Coord::new(coord.y, size.x() as i32 - 1 - coord.x),
Clockwise180 => {
Coord::new(size.x() as i32 - 1 - coord.x, size.y() as i32 - 1 - coord.y)
}
Clockwise270 => Coord::new(size.y() as i32 - 1 - coord.y, coord.x),
DiagonallyFlipped => Coord::new(coord.y, coord.x),
DiagonallyFlippedClockwise90 => {
Coord::new(size.x() as i32 - 1 - coord.x, coord.y)
}
DiagonallyFlippedClockwise180 => {
Coord::new(size.y() as i32 - 1 - coord.y, size.x() as i32 - 1 - coord.x)
}
DiagonallyFlippedClockwise270 => {
Coord::new(coord.x, size.y() as i32 - 1 - coord.y)
}
}
}
}
#[derive(Debug, Clone)]
pub struct OrientationTable<T> {
table: [Option<T>; NUM_ORIENTATIONS],
}
impl<T> OrientationTable<T> {
pub fn new() -> Self {
Self {
table: [None, None, None, None, None, None, None, None],
}
}
pub fn get(&self, orientation: Orientation) -> Option<&T> {
self.table[orientation as usize].as_ref()
}
pub fn get_mut(&mut self, orientation: Orientation) -> Option<&mut T> {
self.table[orientation as usize].as_mut()
}
pub fn insert(&mut self, orientation: Orientation, value: T) {
self.table[orientation as usize] = Some(value);
}
pub fn iter(&self) -> impl Iterator<Item = &T> {
self.table.iter().filter_map(|t| t.as_ref())
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn checks() {
let size = Size::new(3, 3);
assert_eq!(
Orientation::Clockwise90.transform_coord(size, Coord::new(1, 2)),
Coord::new(2, 1)
);
assert_eq!(
Orientation::Clockwise90.transform_coord(size, Coord::new(0, 0)),
Coord::new(0, 2)
);
}
}