improve turn block rendering

game/src/edit/traffic_signals.rs

@@ -6,7 +6,7 @@ use crate::render::{
 };
 use crate::ui::{ShowEverything, UI};
 use ezgui::{hotkey, Choice, Color, EventCtx, GeomBatch, GfxCtx, Key, Line, ModalMenu, Text};
-use geom::{Distance, Duration};
+use geom::Duration;
 use map_model::{
     ControlTrafficSignal, EditCmd, IntersectionID, Phase, TurnGroup, TurnID, TurnPriority, TurnType,
 };
@@ -219,40 +219,48 @@ impl State for TrafficSignalEditor {
 
         for g in &self.groups {
             if Some(g.group.clone()) == self.group_selected {
-                batch.push(Color::RED, g.block.clone());
-                batch.extend(
-                    ui.cs.get_def("selected turn", Color::RED),
-                    g.group.geom(&ui.primary.map).dashed_polygons(
-                        BIG_ARROW_THICKNESS,
-                        Distance::meters(1.0),
-                        Distance::meters(0.5),
-                    ),
+                batch.push(ui.cs.get_def("solid selected", Color::RED), g.block.clone());
+                // Overwrite the original thing
+                batch.push(
+                    ui.cs.get("solid selected"),
+                    g.group
+                        .geom(&ui.primary.map)
+                        .make_arrow(BIG_ARROW_THICKNESS)
+                        .unwrap(),
                 );
             } else {
-                let color = match phase.get_priority_group(&g.group) {
-                    TurnPriority::Protected => ui.cs.get("turn protected by traffic signal"),
-                    TurnPriority::Yield => ui
-                        .cs
-                        .get("turn that can yield by traffic signal")
-                        .alpha(1.0),
-                    TurnPriority::Banned => {
-                        ui.cs.get_def("turn not in current phase", Color::BLACK)
-                    }
-                };
-                batch.push(color, g.block.clone());
+                batch.push(
+                    ui.cs.get_def("turn block background", Color::grey(0.6)),
+                    g.block.clone(),
+                );
             }
+            let arrow_color = match phase.get_priority_group(&g.group) {
+                TurnPriority::Protected => ui.cs.get("turn protected by traffic signal"),
+                TurnPriority::Yield => ui
+                    .cs
+                    .get("turn that can yield by traffic signal")
+                    .alpha(1.0),
+                TurnPriority::Banned => ui.cs.get_def("turn not in current phase", Color::BLACK),
+            };
+            batch.push(arrow_color, g.arrow.clone());
         }
         batch.draw(g);
 
         self.diagram.draw(g, &ctx);
 
         self.menu.draw(g);
-        // TODO groups...
-        /*if let Some(t) = self.icon_selected {
-            CommonState::draw_osd(g, ui, &Some(ID::Turn(t)));
-        } else {*/
-        CommonState::draw_osd(g, ui, &None);
-        //}
+        if let Some(ref group) = self.group_selected {
+            CommonState::draw_custom_osd(
+                g,
+                Text::from(Line(format!(
+                    "Turn from {} to {}",
+                    ui.primary.map.get_r(group.from).get_name(),
+                    ui.primary.map.get_r(group.to).get_name()
+                ))),
+            );
+        } else {
+            CommonState::draw_osd(g, ui, &None);
+        }
     }
 }
 

game/src/render/mod.rs

@@ -37,8 +37,6 @@ const EXTRA_SHAPE_POINT_RADIUS: Distance = Distance::const_meters(10.0);
 
 pub const BIG_ARROW_THICKNESS: Distance = Distance::const_meters(0.5);
 
-const TURN_ICON_ARROW_THICKNESS: Distance = Distance::const_meters(0.15);
-const TURN_ICON_ARROW_LENGTH: Distance = Distance::const_meters(2.0);
 pub const CROSSWALK_LINE_THICKNESS: Distance = Distance::const_meters(0.25);
 
 pub const OUTLINE_THICKNESS: Distance = Distance::const_meters(0.5);

game/src/render/turn.rs

@@ -1,20 +1,19 @@
-use crate::render::{BIG_ARROW_THICKNESS, TURN_ICON_ARROW_LENGTH};
+use crate::render::BIG_ARROW_THICKNESS;
 use ezgui::{Color, GeomBatch, GfxCtx};
-use geom::{Distance, Line, Polygon};
-use map_model::{IntersectionID, Map, RoadID, Turn, TurnGroup, LANE_THICKNESS};
-use std::collections::HashMap;
+use geom::{Distance, Line, PolyLine, Polygon};
+use map_model::{IntersectionID, LaneID, Map, Turn, TurnGroup};
+use std::collections::{HashMap, HashSet};
+
+const TURN_ICON_ARROW_LENGTH: Distance = Distance::const_meters(2.0);
 
 pub struct DrawTurn {}
 
 impl DrawTurn {
-    pub fn full_geom(t: &Turn, batch: &mut GeomBatch, color: Color) {
-        batch.push(color, t.geom.make_arrow(BIG_ARROW_THICKNESS * 2.0).unwrap());
-    }
-
     pub fn draw_full(t: &Turn, g: &mut GfxCtx, color: Color) {
-        let mut batch = GeomBatch::new();
-        DrawTurn::full_geom(t, &mut batch, color);
-        batch.draw(g);
+        g.draw_polygon(
+            color,
+            &t.geom.make_arrow(BIG_ARROW_THICKNESS * 2.0).unwrap(),
+        );
     }
 
     // TODO make a polyline.dashed or something
@@ -45,41 +44,56 @@ impl DrawTurn {
     }
 }
 
-// TODO Don't store these in DrawMap; just generate when we hop into the traffic signal editor.
-// Simplifies apply_map_edits!
 pub struct DrawTurnGroup {
     pub group: TurnGroup,
     pub block: Polygon,
+    pub arrow: Polygon,
 }
 
 impl DrawTurnGroup {
     pub fn for_i(i: IntersectionID, map: &Map) -> Vec<DrawTurnGroup> {
         // TODO Sort by angle here if we want some consistency
         // TODO Handle short roads
-        let mut offset_per_road: HashMap<RoadID, f64> = HashMap::new();
+        let mut offset_per_lane: HashMap<LaneID, usize> = HashMap::new();
         let mut draw = Vec::new();
         for group in TurnGroup::for_i(i, map) {
-            let offset = offset_per_road.entry(group.from).or_insert(0.5);
+            let offset = group
+                .members
+                .iter()
+                .map(|t| *offset_per_lane.entry(t.src).or_insert(0))
+                .max()
+                .unwrap() as f64;
+            let (pl, width) = group.src_center_and_width(map);
+            let slice = pl.exact_slice(
+                offset * TURN_ICON_ARROW_LENGTH,
+                (offset + 1.0) * TURN_ICON_ARROW_LENGTH,
+            );
+            let block = slice.make_polygons(width);
 
-            // TODO center it properly
-            let pl = {
-                let r = map.get_r(group.from);
-                if r.dst_i == i {
-                    r.center_pts.reversed()
-                } else {
-                    r.center_pts.clone()
-                }
+            let arrow = {
+                let angle = group.angle(map);
+                let center = slice.middle();
+                PolyLine::new(vec![
+                    center.project_away(TURN_ICON_ARROW_LENGTH / 2.0, angle.opposite()),
+                    center.project_away(TURN_ICON_ARROW_LENGTH / 2.0, angle),
+                ])
+                .make_arrow(Distance::meters(0.5))
+                .unwrap()
             };
-            // TODO Not number of turns, number of source lanes
-            let block = pl
-                .exact_slice(
-                    *offset * TURN_ICON_ARROW_LENGTH,
-                    (*offset + 1.0) * TURN_ICON_ARROW_LENGTH,
-                )
-                .make_polygons(LANE_THICKNESS * (group.members.len() as f64));
-            draw.push(DrawTurnGroup { group, block });
 
-            *offset += 1.0;
+            let mut seen_lanes = HashSet::new();
+            for t in &group.members {
+                if !seen_lanes.contains(&t.src) {
+                    *offset_per_lane.get_mut(&t.src).unwrap() += 1;
+                    seen_lanes.insert(t.src);
+                }
+            }
+
+            draw.push(DrawTurnGroup {
+                group,
+                block,
+                arrow,
+            });
         }
         draw
     }

map_model/src/turn.rs

@@ -1,6 +1,6 @@
-use crate::{IntersectionID, LaneID, Map, RoadID};
+use crate::{IntersectionID, LaneID, Map, RoadID, LANE_THICKNESS};
 use abstutil::MultiMap;
-use geom::{Angle, PolyLine, Pt2D};
+use geom::{Angle, Distance, PolyLine, Pt2D};
 use serde_derive::{Deserialize, Serialize};
 use std::collections::BTreeSet;
 use std::fmt;
@@ -164,4 +164,40 @@ impl TurnGroup {
         }
         PolyLine::new(pts)
     }
+
+    pub fn angle(&self, map: &Map) -> Angle {
+        let t = *self.members.iter().next().unwrap();
+        map.get_t(t).angle()
+    }
+
+    // Polyline points FROM intersection
+    pub fn src_center_and_width(&self, map: &Map) -> (PolyLine, Distance) {
+        let r = map.get_r(self.from);
+        let dir = r.dir_and_offset(self.members.iter().next().unwrap().src).0;
+        let pl = if dir {
+            r.center_pts.clone()
+        } else {
+            r.center_pts.reversed()
+        };
+
+        let mut offsets: Vec<usize> = self
+            .members
+            .iter()
+            .map(|t| r.dir_and_offset(t.src).1)
+            .collect();
+        offsets.sort();
+        offsets.dedup();
+        let offset = if offsets.len() % 2 == 0 {
+            // Middle of two lanes
+            (offsets[offsets.len() / 2] as f64) - 0.5
+        } else {
+            offsets[offsets.len() / 2] as f64
+        };
+        let pl = pl
+            .shift_right(LANE_THICKNESS * (0.5 + offset))
+            .unwrap()
+            .reversed();
+        let width = LANE_THICKNESS * ((*offsets.last().unwrap() - offsets[0] + 1) as f64);
+        (pl, width)
+    }
 }