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use std::collections::HashSet;
use specs::{
ReadStorage,
Write,
Entities,
System,
Join
};
use crate::components::{
Position,
New,
Moved,
Removed
};
use crate::resources::{
Ground
};
#[derive(Default)]
pub struct MakeFloor;
impl <'a> System<'a> for MakeFloor {
type SystemData = (
Entities<'a>,
Write<'a, Ground>,
ReadStorage<'a, Position>,
ReadStorage<'a, New>,
ReadStorage<'a, Moved>,
ReadStorage<'a, Removed>
);
fn run(&mut self, (entities, mut ground, positions, new, moved, removed): Self::SystemData) {
for (ent, pos, _new) in (&entities, &positions, &new).join() {
ground.cells.entry(pos.pos).or_insert(HashSet::new()).insert(ent);
}
}
}
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