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Code Issues Projects Releases Wiki Activity

Draw corners where shoulders and sidewalks meet more carefully.

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This commit is contained in:
Dustin Carlino 2021-02-23 14:20:59 -08:00
parent 0344e51170
commit 9eea3c9247
2 changed files with 58 additions and 45 deletions
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36
data/MANIFEST.json
View File

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67
map_gui/src/render/intersection.rs
View File

@ -229,37 +229,50 @@ pub fn calculate_corners(i: &Intersection, map: &Map) -> Vec<Polygon> {
if map.get_l(turn.id.src).dst_i != i.id {
continue;
}
let width = map
.get_l(turn.id.src)
.width
.min(map.get_l(turn.id.dst).width);
// Special case for dead-ends: just thicken the geometry.
if i.roads.len() == 1 {
corners.push(turn.geom.make_polygons(width));
continue;
}
let l1 = map.get_l(turn.id.src);
let l2 = map.get_l(turn.id.dst);
if let Some(poly) = (|| {
let mut pts = turn.geom.shift_left(width / 2.0).ok()?.into_points();
pts.push(l2.first_line().shift_left(width / 2.0).pt1());
pts.push(l2.first_line().shift_right(width / 2.0).pt1());
pts.extend(
turn.geom
.shift_right(width / 2.0)
.ok()?
.reversed()
.into_points(),
);
pts.push(l1.last_line().shift_right(width / 2.0).pt2());
pts.push(l1.last_line().shift_left(width / 2.0).pt2());
// Special case for dead-ends: just thicken the geometry.
if i.roads.len() == 1 {
corners.push(turn.geom.make_polygons(l1.width.min(l2.width)));
continue;
}
if l1.width == l2.width {
// When two sidewalks or two shoulders meet, use the turn geometry to create some
// nice rounding.
let width = l1.width;
if let Some(poly) = (|| {
let mut pts = turn.geom.shift_left(width / 2.0).ok()?.into_points();
pts.push(l2.first_line().shift_left(width / 2.0).pt1());
pts.push(l2.first_line().shift_right(width / 2.0).pt1());
pts.extend(
turn.geom
.shift_right(width / 2.0)
.ok()?
.reversed()
.into_points(),
);
pts.push(l1.last_line().shift_right(width / 2.0).pt2());
pts.push(l1.last_line().shift_left(width / 2.0).pt2());
pts.push(pts[0]);
// Many resulting shapes aren't valid rings, but we can still triangulate them.
Some(Polygon::buggy_new(pts))
})() {
corners.push(poly);
}
} else {
// When a sidewalk and a shoulder meet, use a simpler shape to connect them.
let mut pts = vec![
l2.first_line().shift_left(l2.width / 2.0).pt1(),
l2.first_line().shift_right(l2.width / 2.0).pt1(),
l1.last_line().shift_right(l1.width / 2.0).pt2(),
l1.last_line().shift_left(l1.width / 2.0).pt2(),
];
pts.push(pts[0]);
Some(Polygon::buggy_new(pts))
})() {
corners.push(poly);
if let Ok(ring) = Ring::new(pts) {
corners.push(ring.to_polygon());
}
}
}
}