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use specs::{
ReadStorage,
WriteStorage,
Write,
Entities,
System,
Join
};
use super::components::{
Position,
Visible,
Controller
};
use super::controls::Control;
use super::resources::TopView;
pub struct Draw;
impl <'a> System<'a> for Draw {
type SystemData = (ReadStorage<'a, Position>, ReadStorage<'a, Visible>, Write<'a, TopView>);
fn run(&mut self, (pos, vis, mut view): Self::SystemData) {
view.cells.clear();
for (pos, vis) in (&pos, &vis).join(){
if pos.x >= 0 && pos.y >= 0 && pos.x < view.width && pos.y < view.height {
view.cells.entry(*pos).or_insert(Vec::new()).push(vis.clone());
view.cells.get_mut(pos).unwrap().sort_by(|a, b| b.height.partial_cmp(&a.height).unwrap());
}
}
}
}
// struct Control;
// impl <'a> System <'a> for Control {
// type SystemData = WriteStorage<'a, Controller>;
// fn run (&mut self, mut controller: Self::SystemData) {
// for controller in &mut controller.join()
// }
// }
pub struct Move;
impl <'a> System<'a> for Move {
type SystemData = (WriteStorage<'a, Controller>, WriteStorage<'a, Position>);
fn run(&mut self, (mut controller, mut pos): Self::SystemData) {
for (controller, pos) in (&mut controller, &mut pos).join(){
match &controller.0 {
Control::Move(direction) => {
let (dx, dy) = direction.to_position();
pos.x += dx;
pos.y += dy;
}
_ => {}
}
}
}
}
pub struct ClearControllers;
impl <'a> System<'a> for ClearControllers {
type SystemData = (Entities<'a>, WriteStorage<'a, Controller>);
fn run(&mut self, (entities, mut controllers): Self::SystemData) {
let mut ents = Vec::new();
for (ent, _controller) in (&*entities, &controllers).join() {
ents.push(ent);
}
for ent in ents {
controllers.remove(ent);
}
}
}
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