1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

// Naming is confusing, but RawMap -> InitialMap -> Map. InitialMap is separate pretty much just
// for the step of producing https://dabreegster.github.io/abstreet/map/importing/geometry.html.

use std::collections::{BTreeMap, BTreeSet};

use lane_specs::LaneSpec;

use abstutil::{Tags, Timer};
use geom::{Bounds, Circle, Distance, PolyLine, Polygon, Pt2D};

pub use self::geometry::intersection_polygon;
use crate::raw::{OriginalRoad, RawMap, RawRoad};
use crate::{osm, DrivingSide, IntersectionType};

mod geometry;
pub mod lane_specs;

pub struct InitialMap {
    pub roads: BTreeMap<OriginalRoad, Road>,
    pub intersections: BTreeMap<osm::NodeID, Intersection>,

    pub bounds: Bounds,
}

pub struct Road {
    // Redundant but useful to embed
    pub id: OriginalRoad,
    pub src_i: osm::NodeID,
    pub dst_i: osm::NodeID,
    // The true center of the road, including sidewalks
    pub trimmed_center_pts: PolyLine,
    pub half_width: Distance,
    pub lane_specs_ltr: Vec<LaneSpec>,
    pub osm_tags: Tags,
}

impl Road {
    pub fn new(id: OriginalRoad, r: &RawRoad, driving_side: DrivingSide) -> Road {
        let lane_specs_ltr = lane_specs::get_lane_specs_ltr(&r.osm_tags, driving_side);
        let (trimmed_center_pts, total_width) = r.get_geometry(id, driving_side);

        Road {
            id,
            src_i: id.i1,
            dst_i: id.i2,
            trimmed_center_pts,
            half_width: total_width / 2.0,
            lane_specs_ltr,
            osm_tags: r.osm_tags.clone(),
        }
    }
}

pub struct Intersection {
    // Redundant but useful to embed
    pub id: osm::NodeID,
    pub polygon: Polygon,
    pub roads: BTreeSet<OriginalRoad>,
    pub intersection_type: IntersectionType,
    pub elevation: Distance,
}

impl InitialMap {
    pub fn new(raw: &RawMap, bounds: &Bounds, timer: &mut Timer) -> InitialMap {
        let mut m = InitialMap {
            roads: BTreeMap::new(),
            intersections: BTreeMap::new(),
            bounds: bounds.clone(),
        };

        for (id, i) in &raw.intersections {
            m.intersections.insert(
                *id,
                Intersection {
                    id: *id,
                    // Dummy thing to start with
                    polygon: Circle::new(Pt2D::new(0.0, 0.0), Distance::meters(1.0)).to_polygon(),
                    roads: BTreeSet::new(),
                    intersection_type: i.intersection_type,
                    elevation: i.elevation,
                },
            );
        }

        for (id, r) in &raw.roads {
            if id.i1 == id.i2 {
                timer.warn(format!("Skipping loop {}", id));
                continue;
            }
            if PolyLine::new(r.center_points.clone()).is_err() {
                timer.warn(format!("Skipping broken geom {}", id));
                continue;
            }

            m.intersections.get_mut(&id.i1).unwrap().roads.insert(*id);
            m.intersections.get_mut(&id.i2).unwrap().roads.insert(*id);

            m.roads
                .insert(*id, Road::new(*id, r, raw.config.driving_side));
        }

        timer.start_iter("find each intersection polygon", m.intersections.len());
        for i in m.intersections.values_mut() {
            timer.next();
            match intersection_polygon(i, &mut m.roads, timer) {
                Ok((poly, _)) => {
                    i.polygon = poly;
                }
                Err(err) => {
                    timer.error(format!(
                        "Can't make intersection geometry for {}: {}",
                        i.id, err
                    ));

                    // Don't trim lines back at all
                    let r = &m.roads[i.roads.iter().next().unwrap()];
                    let pt = if r.src_i == i.id {
                        r.trimmed_center_pts.first_pt()
                    } else {
                        r.trimmed_center_pts.last_pt()
                    };
                    i.polygon = Circle::new(pt, Distance::meters(3.0)).to_polygon();

                    // Also don't attempt to make Movements later!
                    i.intersection_type = IntersectionType::StopSign;
                }
            }
        }

        // Some roads near borders get completely squished. Stretch them out here. Attempting to do
        // this in the convert_osm layer doesn't work, because predicting how much roads will be
        // trimmed is impossible.
        let min_len = Distance::meters(5.0);
        for i in m.intersections.values_mut() {
            if i.intersection_type != IntersectionType::Border {
                continue;
            }
            let r = m.roads.get_mut(i.roads.iter().next().unwrap()).unwrap();
            if r.trimmed_center_pts.length() >= min_len {
                continue;
            }
            if r.dst_i == i.id {
                r.trimmed_center_pts = r.trimmed_center_pts.extend_to_length(min_len);
            } else {
                r.trimmed_center_pts = r
                    .trimmed_center_pts
                    .reversed()
                    .extend_to_length(min_len)
                    .reversed();
            }
            i.polygon = intersection_polygon(i, &mut m.roads, timer).unwrap().0;
            timer.note(format!(
                "Shifted border {} out a bit to make the road a reasonable length",
                i.id
            ));
        }

        m
    }
}