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use std::collections::BTreeSet;
use geom::{Circle, Distance, Line, Polygon};
use map_model::{IntersectionID, Map, Perimeter, RoadID};
use widgetry::{Color, Drawable, EventCtx, GeomBatch};
use crate::app::App;
pub use browse::BrowseNeighborhoods;
mod browse;
mod draw_cells;
mod viewer;
pub struct Neighborhood {
orig_perimeter: Perimeter,
perimeter: BTreeSet<RoadID>,
borders: BTreeSet<IntersectionID>,
cells: Vec<BTreeSet<RoadID>>,
fade_irrelevant: Drawable,
draw_filters: Drawable,
}
impl Neighborhood {
fn new(ctx: &EventCtx, app: &App, orig_perimeter: Perimeter) -> Neighborhood {
let map = &app.primary.map;
let cells = find_cells(map, &orig_perimeter, &app.session.modal_filters);
let mut n = Neighborhood {
orig_perimeter,
perimeter: BTreeSet::new(),
borders: BTreeSet::new(),
cells,
fade_irrelevant: Drawable::empty(ctx),
draw_filters: Drawable::empty(ctx),
};
let mut holes = Vec::new();
for id in &n.orig_perimeter.roads {
n.perimeter.insert(id.road);
let road = map.get_r(id.road);
n.borders.insert(road.src_i);
n.borders.insert(road.dst_i);
holes.push(road.get_thick_polygon());
}
for i in &n.borders {
holes.push(map.get_i(*i).polygon.clone());
}
let fade_area = Polygon::with_holes(
map.get_boundary_polygon().clone().into_ring(),
if true {
vec![n
.orig_perimeter
.clone()
.to_block(map)
.unwrap()
.polygon
.into_ring()]
} else {
vec![Polygon::convex_hull(holes).into_ring()]
},
);
n.fade_irrelevant = GeomBatch::from(vec![(app.cs.fade_map_dark, fade_area)]).upload(ctx);
let mut batch = GeomBatch::new();
for r in &app.session.modal_filters {
if !n.orig_perimeter.interior.contains(r) {
continue;
}
let road = map.get_r(*r);
let pct_along = if n.borders.contains(&road.src_i) {
0.1
} else if n.borders.contains(&road.dst_i) {
0.9
} else {
0.5
};
if let Ok((pt, angle)) = road.center_pts.dist_along(pct_along * road.length()) {
let filter_len = road.get_width();
batch.push(Color::RED, Circle::new(pt, filter_len).to_polygon());
let barrier = Line::must_new(
pt.project_away(0.8 * filter_len, angle.rotate_degs(90.0)),
pt.project_away(0.8 * filter_len, angle.rotate_degs(-90.0)),
)
.make_polygons(Distance::meters(7.0));
batch.push(Color::WHITE, barrier.clone());
}
}
n.draw_filters = batch.upload(ctx);
n
}
}
fn find_cells(
map: &Map,
perimeter: &Perimeter,
modal_filters: &BTreeSet<RoadID>,
) -> Vec<BTreeSet<RoadID>> {
let mut cells = Vec::new();
let mut visited = BTreeSet::new();
for start in &perimeter.interior {
if visited.contains(start) {
continue;
}
let cell = floodfill(map, *start, perimeter, modal_filters);
cells.push(cell.clone());
visited.extend(cell);
}
cells
}
fn floodfill(
map: &Map,
start: RoadID,
perimeter: &Perimeter,
modal_filters: &BTreeSet<RoadID>,
) -> BTreeSet<RoadID> {
let mut visited = BTreeSet::new();
let mut queue = vec![start];
if modal_filters.contains(&start) {
visited.insert(start);
return visited;
}
while !queue.is_empty() {
let current = map.get_r(queue.pop().unwrap());
if visited.contains(¤t.id) {
continue;
}
visited.insert(current.id);
for i in [current.src_i, current.dst_i] {
for next in &map.get_i(i).roads {
if perimeter.interior.contains(next) && !modal_filters.contains(next) {
queue.push(*next);
}
}
}
}
visited
}