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Quick heuristic for spacing labels out a bit

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This commit is contained in:
Dustin Carlino 2021-08-20 10:17:09 -07:00
parent 0931b0f245
commit b575a0d346
1 changed files with 18 additions and 3 deletions
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21
game/src/ungap/labels.rs
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@ -1,6 +1,7 @@
use std::cell::RefCell; use std::cell::RefCell;
use std::collections::HashMap;
use geom::Distance; use geom::{Distance, Pt2D};
use map_model::osm; use map_model::osm;
use widgetry::{Color, Drawable, GeomBatch, GfxCtx, Line, Text}; use widgetry::{Color, Drawable, GeomBatch, GfxCtx, Line, Text};
@ -40,6 +41,10 @@ impl DrawRoadLabels {
let mut batch = GeomBatch::new(); let mut batch = GeomBatch::new();
let map = &app.primary.map; let map = &app.primary.map;
// Record the center of each label we place, per road, so we can avoid placing them too
// close to each other.
let mut labels_per_road: HashMap<String, Vec<Pt2D>> = HashMap::new();
for r in map.all_roads() { for r in map.all_roads() {
if r.get_rank() == osm::RoadRank::Local if r.get_rank() == osm::RoadRank::Local
|| r.is_light_rail() || r.is_light_rail()
@ -48,12 +53,22 @@ impl DrawRoadLabels {
continue; continue;
} }
let name = r.get_name(app.opts.language.as_ref()); let name = r.get_name(app.opts.language.as_ref());
if name == "???" { if name == "???" || name.starts_with("Exit for ") {
continue; continue;
} }
let (pt, angle) = r.center_pts.must_dist_along(r.center_pts.length() / 2.0);
// Are we too close to some other label?
let other_pts = labels_per_road.entry(name.clone()).or_insert_with(Vec::new);
if other_pts
.iter()
.any(|other_pt| other_pt.dist_to(pt) < Distance::meters(200.0))
{
continue;
}
other_pts.push(pt);
let txt = Text::from(Line(name).fg(Color::WHITE)).bg(Color::BLACK); let txt = Text::from(Line(name).fg(Color::WHITE)).bg(Color::BLACK);
let (pt, angle) = r.center_pts.must_dist_along(r.center_pts.length() / 2.0);
batch.append( batch.append(
txt.render_autocropped(g) txt.render_autocropped(g)
// TODO Probably based on the discretized zoom // TODO Probably based on the discretized zoom