2021-09-28 17:49:44 +00:00
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use std::{
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cell::RefCell,
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collections::{HashMap, HashSet},
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};
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2021-05-13 17:25:45 +00:00
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2021-09-28 19:36:21 +00:00
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use bevy::{core::FixedTimestep, prelude::*};
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2021-09-28 17:49:44 +00:00
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use bevy_rapier2d::{na, na::UnitComplex};
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2021-05-13 17:25:45 +00:00
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use coord_2d::{Coord, Size};
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use derive_more::{Deref, DerefMut};
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use shadowcast::{vision_distance, Context, InputGrid};
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use crate::{
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2021-06-09 19:13:09 +00:00
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bevy_rapier2d::prelude::*,
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2021-05-16 22:24:26 +00:00
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core::{Angle, Coordinates, Player, PointLike},
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2021-05-13 17:25:45 +00:00
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log::Log,
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map::{ITileType, Map, MapConfig},
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2021-09-21 11:38:51 +00:00
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utils::target_and_other,
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2021-05-13 17:25:45 +00:00
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};
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2022-01-10 19:50:52 +00:00
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#[derive(Component, Clone, Copy, Debug, Default, Reflect)]
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2021-05-17 14:50:03 +00:00
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#[reflect(Component)]
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pub struct DontLogWhenVisible;
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2022-01-10 19:50:52 +00:00
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#[derive(Component, Clone, Debug, Default, Deref, DerefMut, Reflect)]
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2021-05-13 17:25:45 +00:00
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#[reflect(Component)]
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pub struct RevealedTiles(pub Vec<bool>);
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2022-01-10 19:50:52 +00:00
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#[derive(Component, Clone, Debug, Eq, PartialEq)]
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2021-05-13 17:25:45 +00:00
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pub struct Viewshed {
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pub range: u32,
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2021-09-21 11:38:51 +00:00
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pub visible_points: HashSet<(i32, i32)>,
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2021-05-13 17:25:45 +00:00
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}
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impl Default for Viewshed {
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fn default() -> Self {
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Self {
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range: 15,
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2021-09-21 11:38:51 +00:00
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visible_points: HashSet::new(),
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2021-05-13 17:25:45 +00:00
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}
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}
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}
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impl Viewshed {
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2021-09-21 11:38:51 +00:00
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pub fn is_point_visible(&self, point: &dyn PointLike) -> bool {
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self.visible_points.contains(&point.into())
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2021-05-13 17:25:45 +00:00
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}
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2021-10-12 21:59:59 +00:00
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fn update(
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&mut self,
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viewer_entity: &Entity,
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visible_entities: &mut VisibleEntities,
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start: &dyn PointLike,
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query_pipeline: &QueryPipeline,
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collider_query: &QueryPipelineColliderComponentsQuery,
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map: &Map,
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visible_query: &Query<&Visible>,
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cache: &mut HashMap<(i32, i32), (HashSet<Entity>, u8)>,
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events: &mut EventWriter<VisibilityChanged>,
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) {
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let mut context: Context<u8> = Context::default();
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let vision_distance = vision_distance::Circle::new(self.range);
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let shape = ColliderShape::cuboid(0.49, 0.49);
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let origin = point!(start.x(), start.y());
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let coord = Coord::new(start.x_i32(), start.y_i32());
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2022-01-12 17:05:12 +00:00
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let collider_set = QueryPipelineColliderComponentsSet(collider_query);
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2021-10-12 21:59:59 +00:00
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let mut new_visible_entities = HashSet::<Entity>::new();
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let visibility_grid = VisibilityGrid(
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map,
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RefCell::new(Box::new(|coord: Coord| {
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if let Some((entities, opacity)) = cache.get(&(coord.x, coord.y)) {
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for e in entities {
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new_visible_entities.insert(*e);
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}
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return *opacity;
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}
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let tile = map.at(coord.x as usize, coord.y as usize);
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if tile.blocks_visibility() {
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return u8::MAX;
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}
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let mut entities = HashSet::new();
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let shape_pos = (Vec2::new(coord.x as f32 + 0.5, coord.y as f32 + 0.5), 0.);
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let dest = point!(coord.x as f32 + 0.5, coord.y as f32 + 0.5);
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if na::distance(&origin, &dest) >= self.range as f32 {
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return u8::MAX;
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}
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let mut opacity = 0;
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query_pipeline.intersections_with_shape(
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&collider_set,
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&shape_pos.into(),
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&*shape,
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InteractionGroups::all(),
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Some(&|v| {
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v.entity() != *viewer_entity && visible_query.get(v.entity()).is_ok()
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}),
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|handle| {
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let entity = handle.entity();
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entities.insert(entity);
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if let Ok(visible) = visible_query.get(entity) {
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opacity = **visible;
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}
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true
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},
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);
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for e in &entities {
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new_visible_entities.insert(*e);
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}
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cache.insert((coord.x, coord.y), (entities, opacity));
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opacity
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})),
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);
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let mut new_visible = HashSet::new();
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context.for_each_visible(
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coord,
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&visibility_grid,
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&visibility_grid,
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vision_distance,
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255,
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|coord, _directions, _visibility| {
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new_visible.insert((coord.x, coord.y));
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},
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);
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if self.visible_points != new_visible {
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self.visible_points = new_visible;
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}
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if new_visible_entities != **visible_entities {
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for lost in visible_entities.difference(&new_visible_entities) {
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events.send(VisibilityChanged::Lost {
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viewer: *viewer_entity,
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viewed: *lost,
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});
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}
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for gained in new_visible_entities.difference(visible_entities) {
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events.send(VisibilityChanged::Gained {
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viewer: *viewer_entity,
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viewed: *gained,
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});
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}
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**visible_entities = new_visible_entities;
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}
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}
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2021-05-13 17:25:45 +00:00
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}
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2022-01-10 19:50:52 +00:00
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#[derive(Component, Clone, Copy, Debug, Deref, DerefMut, Reflect)]
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2021-09-22 13:23:01 +00:00
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#[reflect(Component)]
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pub struct Visible(pub u8);
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impl Default for Visible {
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fn default() -> Self {
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Self::opaque()
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}
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}
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impl Visible {
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pub fn transparent() -> Self {
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Self(0)
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}
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2021-09-23 17:58:39 +00:00
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pub fn opaque() -> Self {
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2021-09-22 13:23:01 +00:00
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Self(u8::MAX)
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}
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}
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2021-10-12 21:59:59 +00:00
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2022-01-10 19:50:52 +00:00
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#[derive(Component, Clone, Debug, Default, Deref, DerefMut)]
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2021-09-21 11:38:51 +00:00
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pub struct VisibleEntities(HashSet<Entity>);
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#[derive(Bundle, Default)]
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pub struct ViewshedBundle {
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pub viewshed: Viewshed,
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pub visible_entities: VisibleEntities,
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}
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impl ViewshedBundle {
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pub fn new(range: u32) -> Self {
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Self {
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viewshed: Viewshed {
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range,
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..Default::default()
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},
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..Default::default()
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}
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}
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}
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pub enum VisibilityChanged {
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Gained { viewer: Entity, viewed: Entity },
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Lost { viewer: Entity, viewed: Entity },
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}
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2021-06-09 22:42:04 +00:00
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impl PointLike for Coord {
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fn x(&self) -> f32 {
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self.x as f32
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}
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fn y(&self) -> f32 {
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self.y as f32
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}
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}
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2021-05-13 17:25:45 +00:00
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fn add_visibility_indices(
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mut commands: Commands,
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2021-09-27 18:45:52 +00:00
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query: Query<(Entity, &Map), (Added<Map>, Without<RevealedTiles>)>,
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2021-05-13 17:25:45 +00:00
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map_config: Res<MapConfig>,
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) {
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for (entity, map) in query.iter() {
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2021-06-09 19:53:48 +00:00
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let count = map.width * map.height;
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2021-05-13 17:25:45 +00:00
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commands
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.entity(entity)
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.insert(RevealedTiles(vec![map_config.start_revealed; count]));
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}
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}
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2021-09-21 11:38:51 +00:00
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fn viewshed_removed(
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query: RemovedComponents<Viewshed>,
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2021-09-28 17:49:44 +00:00
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visible_entities: Query<&VisibleEntities>,
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mut events: EventWriter<VisibilityChanged>,
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2021-09-21 11:38:51 +00:00
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) {
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for entity in query.iter() {
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2021-09-28 17:49:44 +00:00
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if let Ok(visible) = visible_entities.get(entity) {
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for e in visible.iter() {
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events.send(VisibilityChanged::Lost {
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viewer: entity,
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viewed: *e,
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})
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}
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2021-09-21 11:38:51 +00:00
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}
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}
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}
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2021-09-28 17:49:44 +00:00
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pub struct VisibilityGrid<'a, F>(pub &'a Map, pub RefCell<Box<F>>);
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2021-05-13 17:25:45 +00:00
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2021-06-09 19:13:09 +00:00
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impl<'a, F> InputGrid for VisibilityGrid<'a, F>
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where
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2021-09-28 17:49:44 +00:00
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F: FnMut(Coord) -> u8,
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2021-06-09 19:13:09 +00:00
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{
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type Grid = VisibilityGrid<'a, F>;
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2021-05-13 17:25:45 +00:00
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type Opacity = u8;
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fn size(&self, grid: &Self::Grid) -> Size {
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2021-06-09 19:53:48 +00:00
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Size::new(grid.0.width as u32, grid.0.height as u32)
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2021-05-13 17:25:45 +00:00
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}
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2021-06-09 19:13:09 +00:00
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fn get_opacity(&self, _grid: &Self::Grid, coord: Coord) -> Self::Opacity {
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2021-09-28 17:49:44 +00:00
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(self.1.borrow_mut())(coord)
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2021-05-13 17:25:45 +00:00
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}
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}
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2021-06-16 16:28:06 +00:00
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fn update_viewshed(
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2021-09-23 17:58:39 +00:00
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config: Res<RapierConfiguration>,
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2021-10-12 21:59:59 +00:00
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coordinates: Query<(Entity, &Coordinates), Changed<Coordinates>>,
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visible: Query<&Visible>,
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2021-09-28 17:49:44 +00:00
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mut viewers: Query<(Entity, &mut Viewshed, &mut VisibleEntities, &Coordinates)>,
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2021-06-16 16:28:06 +00:00
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map: Query<&Map>,
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query_pipeline: Res<QueryPipeline>,
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collider_query: QueryPipelineColliderComponentsQuery,
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2021-09-28 17:49:44 +00:00
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mut changed: EventWriter<VisibilityChanged>,
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2021-06-16 16:28:06 +00:00
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) {
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2021-09-23 17:58:39 +00:00
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if !config.query_pipeline_active {
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return;
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}
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2021-10-12 21:59:59 +00:00
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let mut to_update = HashSet::new();
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for (entity, coordinates) in coordinates.iter() {
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if to_update.contains(&entity) {
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continue;
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}
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if viewers.get_mut(entity).is_ok() {
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to_update.insert(entity);
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}
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if visible.get(entity).is_err() {
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continue;
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}
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for (viewer_entity, viewshed, _, viewer_coordinates) in viewers.iter_mut() {
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if viewer_entity != entity
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&& viewer_coordinates.distance(&coordinates) <= viewshed.range as f32
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2021-08-23 15:14:03 +00:00
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{
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2021-10-12 21:59:59 +00:00
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to_update.insert(viewer_entity);
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2021-06-16 16:28:06 +00:00
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continue;
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}
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}
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}
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2021-10-12 21:59:59 +00:00
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for entity in to_update.iter() {
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if let Ok((viewer_entity, mut viewshed, mut visible_entities, viewer_coordinates)) =
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viewers.get_mut(*entity)
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{
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2022-01-13 20:43:02 +00:00
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if let Ok(map) = map.get_single() {
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let mut cache = HashMap::new();
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viewshed.update(
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&viewer_entity,
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&mut visible_entities,
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viewer_coordinates,
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&*query_pipeline,
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&collider_query,
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map,
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&visible,
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&mut cache,
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&mut changed,
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);
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}
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2021-05-26 19:57:55 +00:00
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}
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}
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}
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2021-09-22 13:23:01 +00:00
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fn remove_visible(
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removed: RemovedComponents<Visible>,
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2021-09-21 11:38:51 +00:00
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mut viewers: Query<(Entity, &mut Viewshed, &mut VisibleEntities, &Coordinates)>,
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2021-06-16 16:28:06 +00:00
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map: Query<&Map>,
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query_pipeline: Res<QueryPipeline>,
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collider_query: QueryPipelineColliderComponentsQuery,
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2021-09-22 13:23:01 +00:00
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visible: Query<&Visible>,
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2021-09-28 17:49:44 +00:00
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mut changed: EventWriter<VisibilityChanged>,
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2021-06-16 16:28:06 +00:00
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) {
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2021-09-21 11:38:51 +00:00
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for removed in removed.iter() {
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for (viewer_entity, mut viewshed, mut visible_entities, start) in viewers.iter_mut() {
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if !visible_entities.contains(&removed) {
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continue;
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}
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visible_entities.remove(&removed);
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2022-01-12 17:05:12 +00:00
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let map = map.single();
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let mut cache = HashMap::new();
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viewshed.update(
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&viewer_entity,
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&mut visible_entities,
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start,
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&*query_pipeline,
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&collider_query,
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map,
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&visible,
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&mut cache,
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|
|
|
&mut changed,
|
|
|
|
);
|
2021-06-16 16:28:06 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-09-28 17:49:44 +00:00
|
|
|
fn update_revealed_tiles(
|
2021-09-27 18:45:52 +00:00
|
|
|
mut map: Query<(&Map, &mut RevealedTiles)>,
|
2021-05-21 17:04:10 +00:00
|
|
|
viewers: Query<&Viewshed, With<Player>>,
|
2021-05-13 17:25:45 +00:00
|
|
|
) {
|
2021-09-27 18:45:52 +00:00
|
|
|
for (map, mut revealed_tiles) in map.iter_mut() {
|
2021-05-21 17:04:10 +00:00
|
|
|
for viewshed in viewers.iter() {
|
2021-09-21 11:38:51 +00:00
|
|
|
for v in viewshed.visible_points.iter() {
|
2021-06-09 19:53:48 +00:00
|
|
|
let idx = v.to_index(map.width);
|
2021-09-27 18:45:52 +00:00
|
|
|
if idx >= revealed_tiles.len() {
|
2021-09-01 16:34:38 +00:00
|
|
|
continue;
|
|
|
|
}
|
2021-05-13 17:25:45 +00:00
|
|
|
revealed_tiles[idx] = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn log_visible(
|
2021-09-23 17:58:39 +00:00
|
|
|
time: Res<Time>,
|
|
|
|
mut recently_lost: Local<HashMap<Entity, Timer>>,
|
2021-09-21 17:58:57 +00:00
|
|
|
mut events: EventReader<VisibilityChanged>,
|
2021-05-13 17:25:45 +00:00
|
|
|
mut log: Query<&mut Log>,
|
2021-09-21 11:38:51 +00:00
|
|
|
viewers: Query<(Entity, &Coordinates, &Transform), (With<Player>, With<Viewshed>)>,
|
2021-09-23 17:58:39 +00:00
|
|
|
visible: Query<
|
2022-01-12 17:05:12 +00:00
|
|
|
(
|
|
|
|
&Name,
|
|
|
|
Option<&RigidBodyPositionComponent>,
|
|
|
|
Option<&ColliderPositionComponent>,
|
|
|
|
),
|
2021-09-21 11:38:51 +00:00
|
|
|
Without<DontLogWhenVisible>,
|
|
|
|
>,
|
2021-05-13 17:25:45 +00:00
|
|
|
) {
|
2021-09-23 17:58:39 +00:00
|
|
|
for timer in recently_lost.values_mut() {
|
2021-05-13 17:25:45 +00:00
|
|
|
timer.tick(time.delta());
|
2021-09-23 17:58:39 +00:00
|
|
|
}
|
|
|
|
recently_lost.retain(|_entity, timer| !timer.finished());
|
2021-09-21 11:38:51 +00:00
|
|
|
for event in events.iter() {
|
2021-09-23 17:58:39 +00:00
|
|
|
let viewer = match event {
|
|
|
|
VisibilityChanged::Gained { viewer, .. } => viewer,
|
|
|
|
VisibilityChanged::Lost { viewer, .. } => viewer,
|
|
|
|
};
|
|
|
|
if let Ok((viewer_entity, viewer_coordinates, viewer_transform)) = viewers.get(*viewer) {
|
|
|
|
if let VisibilityChanged::Gained { viewed, .. } = event {
|
|
|
|
if *viewed == viewer_entity || recently_lost.contains_key(viewed) {
|
2021-09-21 17:58:57 +00:00
|
|
|
continue;
|
|
|
|
}
|
2021-09-23 17:58:39 +00:00
|
|
|
if let Ok((name, body_position, collider_position)) = visible.get(*viewed) {
|
2022-01-12 17:05:12 +00:00
|
|
|
let mut log = log.single_mut();
|
|
|
|
let viewed_coordinates = if let Some(p) = body_position {
|
|
|
|
(p.position.translation.x, p.position.translation.y)
|
|
|
|
} else if let Some(p) = collider_position {
|
|
|
|
(p.translation.x, p.translation.y)
|
|
|
|
} else {
|
|
|
|
(0., 0.)
|
|
|
|
};
|
|
|
|
let forward = viewer_transform.local_x();
|
|
|
|
let yaw = Angle::Radians(forward.y.atan2(forward.x));
|
|
|
|
let location =
|
|
|
|
viewer_coordinates.direction_and_distance(&viewed_coordinates, Some(yaw));
|
2022-01-19 22:38:32 +00:00
|
|
|
log.push(format!("{}: {location}", **name));
|
2021-09-21 11:38:51 +00:00
|
|
|
}
|
2021-09-23 17:58:39 +00:00
|
|
|
} else if let VisibilityChanged::Lost { viewed, .. } = event {
|
|
|
|
recently_lost.insert(*viewed, Timer::from_seconds(2., false));
|
2021-05-13 17:25:45 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub const LOG_VISIBLE_LABEL: &str = "LOG_VISIBLE";
|
|
|
|
|
|
|
|
pub struct VisibilityPlugin;
|
|
|
|
|
|
|
|
impl Plugin for VisibilityPlugin {
|
2022-01-10 19:50:52 +00:00
|
|
|
fn build(&self, app: &mut App) {
|
2021-09-28 17:49:44 +00:00
|
|
|
app.add_event::<VisibilityChanged>()
|
2022-01-10 19:50:52 +00:00
|
|
|
.add_system(add_visibility_indices)
|
|
|
|
.add_system_to_stage(CoreStage::PostUpdate, viewshed_removed)
|
2021-09-28 19:36:21 +00:00
|
|
|
.add_system_set(
|
|
|
|
SystemSet::new()
|
2021-12-20 14:41:33 +00:00
|
|
|
.with_run_criteria(FixedTimestep::step(0.1))
|
2022-01-10 19:50:52 +00:00
|
|
|
.with_system(update_viewshed),
|
2021-09-28 19:36:21 +00:00
|
|
|
)
|
2022-01-10 19:50:52 +00:00
|
|
|
.add_system_to_stage(CoreStage::PostUpdate, remove_visible)
|
|
|
|
.add_system_to_stage(CoreStage::PostUpdate, update_revealed_tiles)
|
|
|
|
.add_system_to_stage(CoreStage::PostUpdate, log_visible);
|
2021-05-13 17:25:45 +00:00
|
|
|
}
|
|
|
|
}
|