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#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, PartialOrd)]
pub struct Location(pub i32, pub i32);
impl Location {
pub fn distance(&self, other: &Location) -> usize {
(((self.0 - other.0).pow(2) + (self.1 - other.1).pow(2)) as f64).sqrt() as usize
}
pub fn neighbours(self, impassable : Vec<(Location, usize)>) -> Vec<(Location, usize)> {
let mut nearby = vec![Location(self.0 + 1, self.1), Location(self.0 - 1, self.1),
Location(self.0, self.1 + 1), Location(self.0, self.1 - 1),
Location(self.0 + 1, self.1 + 1), Location(self.0 - 1, self.1 - 1),
Location(self.0 + 1, self.1 - 1), Location(self.0 - 1, self.1 + 1)];
nearby.retain(|potential_location| {
let mut keep = true;
for location in impassable.iter() {
if *potential_location == location.0 {
keep = false;
}
}
keep
});
nearby.into_iter().map(|p| (p, 1)).collect()
}
}
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