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- extern crate specs;
- use specs::prelude::*;
- use super::{Viewshed, Position, Map, Player, Hidden, gamelog::GameLog, Name};
- extern crate rltk;
- use rltk::{field_of_view, Point};
- pub struct VisibilitySystem {}
- impl<'a> System<'a> for VisibilitySystem {
- #[allow(clippy::type_complexity)]
- type SystemData = ( WriteExpect<'a, Map>,
- Entities<'a>,
- WriteStorage<'a, Viewshed>,
- ReadStorage<'a, Position>,
- ReadStorage<'a, Player>,
- WriteStorage<'a, Hidden>,
- WriteExpect<'a, rltk::RandomNumberGenerator>,
- WriteExpect<'a, GameLog>,
- ReadStorage<'a, Name>,);
- fn run(&mut self, data : Self::SystemData) {
- let (mut map, entities, mut viewshed, pos, player,
- mut hidden, mut rng, mut log, names) = data;
- for (ent,viewshed,pos) in (&entities, &mut viewshed, &pos).join() {
- if viewshed.dirty {
- viewshed.dirty = false;
- viewshed.visible_tiles = field_of_view(Point::new(pos.x, pos.y), viewshed.range, &*map);
- // If this is the player, reveal what they can see
- let _p : Option<&Player> = player.get(ent);
- if let Some(_p) = _p {
- for t in map.visible_tiles.iter_mut() { *t = false };
- for vis in viewshed.visible_tiles.iter() {
- let idx = map.xy_idx(vis.x, vis.y);
- map.revealed_tiles[idx] = true;
- map.visible_tiles[idx] = true;
- // Chance to reveal hidden things
- for e in map.tile_content[idx].iter() {
- let maybe_hidden = hidden.get(*e);
- if let Some(_maybe_hidden) = maybe_hidden {
- if rng.roll_dice(1,24)==1 {
- let name = names.get(*e);
- if let Some(name) = name {
- log.entries.insert(0, format!("You spotted a {}.", &name.name));
- }
- hidden.remove(*e);
- }
- }
- }
- }
- }
- }
- }
- }
- }
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