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use std::collections::HashMap;
use specs::{
World,
WorldExt,
Builder,
DispatcherBuilder,
Dispatcher,
Entity
};
use super::controls::Control;
use super::components::{Position, Visible, Controller};
use super::assemblages::Assemblage;
use super::resources::{Size, TopView};
use super::systems::{Draw, Move, ClearControllers};
pub struct Room<'a, 'b> {
world: World,
dispatcher: Dispatcher<'a, 'b>,
spawn: (i32, i32),
players: HashMap<String, Entity>
}
impl <'a, 'b>Room<'a, 'b> {
pub fn new(size: (i32, i32)) -> Room<'a, 'b> {
let (width, height) = size;
let mut world = World::new();
world.register::<Position>();
world.register::<Visible>();
world.register::<Controller>();
world.insert(Size(width, height));
world.insert(TopView{width: width, height: height, cells: HashMap::new()});
let dispatcher = DispatcherBuilder::new()
.with(Move, "move", &[])
.with(Draw, "draw", &["move"])
.with(ClearControllers, "clearcontrollers", &["move"])
.build();
Room {
world,
dispatcher,
spawn: (width / 2, height / 2),
players: HashMap::new()
}
}
pub fn view(&self) -> (Vec<usize>, Vec<Vec<String>>) {
let tv = &*self.world.fetch::<TopView>();
let width = tv.width;
let height = tv.height;
let size = width * height;
let mut values :Vec<usize> = Vec::with_capacity(size as usize);
let mut mapping: Vec<Vec<String>> = Vec::new();
for y in 0..height {
for x in 0..width {
let sprites: Vec<String> = match tv.cells.get(&Position{x: x, y: y}) {
Some(sprites) => {sprites.iter().map(|v| v.sprite.clone()).collect()}
None => {vec![]}
};
values.push(
match mapping.iter().position(|x| x == &sprites) {
Some(index) => {
index
}
None => {
mapping.push(sprites);
mapping.len() - 1
}
}
)
}
}
(values, mapping)
}
pub fn update(&mut self) {
self.dispatcher.dispatch(&mut self.world);
self.world.maintain();
}
pub fn get_size(&self) -> (i32, i32) {
let Size(width, height) = *self.world.fetch::<Size>();
(width, height)
}
pub fn add_obj(&mut self, template: &dyn Assemblage, (x, y): (i32, i32)) -> Entity {
template.build(self.world.create_entity()).with(Position{x, y}).build()
}
pub fn add_player(&mut self, name: &str, template: &dyn Assemblage) {
let ent = self.add_obj(template, self.spawn);
self.players.insert(name.to_string(), ent);
}
pub fn remove_player(&mut self, name: &str){
// todo: proper error handling
let ent = self.players.remove(name).expect("unknown player name");
self.world.delete_entity(ent).expect("player in world does not have entity");
}
// pub fn clear_controls(&mut self){
// (*self.world.fetch_mut::<Controls>()).0.clear();
// }
pub fn control(&mut self, name: String, control: Control){
if let Some(ent) = self.players.get(&name){
let _ = self.world.write_component::<Controller>().insert(*ent, Controller(control));
}
}
}
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