allow creating new internal points for roads in the editor

map_editor/src/main.rs

@@ -243,6 +243,14 @@ impl GUI for UI {
                                     .cloned()
                                     .unwrap_or_else(String::new),
                             );
+                        } else if cursor.is_some()
+                            && ctx.input.key_pressed(Key::P, "create new point")
+                        {
+                            if let Some(id) =
+                                self.model.insert_r_pt(r, cursor.unwrap(), ctx.prerender)
+                            {
+                                self.model.world.force_set_selection(id);
+                            }
                         }
                     }
                     Some(ID::RoadPoint(r, idx)) => {
@@ -283,8 +291,8 @@ impl GUI for UI {
                         // dead-center messes up the precomputed triangles.
                         } else if ctx.input.key_pressed(Key::B, "create building") {
                             if let Some(pt) = cursor {
-                                self.model.create_b(pt, ctx.prerender);
-                                self.model.world.handle_mouseover(ctx);
+                                let id = self.model.create_b(pt, ctx.prerender);
+                                self.model.world.force_set_selection(id);
                             }
                         } else if ctx.input.key_pressed(Key::LeftShift, "select area") {
                             if let Some(pt) = cursor {

map_editor/src/model.rs

@@ -1,7 +1,7 @@
 use crate::world::{Object, ObjectID, World};
 use abstutil::{read_binary, Timer};
 use ezgui::{Color, Line, Prerender, Text};
-use geom::{Bounds, Circle, Distance, PolyLine, Polygon, Pt2D};
+use geom::{Bounds, Circle, Distance, FindClosest, PolyLine, Polygon, Pt2D};
 use map_model::raw::{
     MapFixes, OriginalIntersection, OriginalRoad, RawBuilding, RawIntersection, RawMap, RawRoad,
     RestrictionType, StableBuildingID, StableIntersectionID, StableRoadID,
@@ -825,6 +825,36 @@ impl Model {
         self.show_r_points(id, prerender);
     }
 
+    pub fn insert_r_pt(&mut self, id: StableRoadID, pt: Pt2D, prerender: &Prerender) -> Option<ID> {
+        assert_eq!(self.showing_pts, Some(id));
+
+        self.stop_showing_pts(id);
+        self.road_deleted(id);
+        self.world.delete(ID::Intersection(self.map.roads[&id].i1));
+        self.world.delete(ID::Intersection(self.map.roads[&id].i2));
+
+        let mut pts = self.map.roads[&id].center_points.clone();
+        let mut closest = FindClosest::new(&self.compute_bounds());
+        for (idx, pair) in pts.windows(2).enumerate() {
+            closest.add(idx + 1, &vec![pair[0], pair[1]]);
+        }
+        let new_id = if let Some((idx, _)) = closest.closest_pt(pt, Distance::meters(5.0)) {
+            pts.insert(idx, pt);
+            Some(ID::RoadPoint(id, idx))
+        } else {
+            println!("Couldn't figure out where to insert new point");
+            None
+        };
+        self.map.override_road_points(id, pts);
+
+        self.road_added(id, prerender);
+        self.intersection_added(self.map.roads[&id].i1, prerender);
+        self.intersection_added(self.map.roads[&id].i2, prerender);
+        self.show_r_points(id, prerender);
+
+        new_id
+    }
+
     // TODO Need to show_r_points of the thing we wind up selecting after this.
     pub fn merge_r(&mut self, id: StableRoadID, prerender: &Prerender) {
         if let Err(e) = self.map.can_merge_short_road(id) {
@@ -899,7 +929,7 @@ impl Model {
         );
     }
 
-    pub fn create_b(&mut self, center: Pt2D, prerender: &Prerender) {
+    pub fn create_b(&mut self, center: Pt2D, prerender: &Prerender) -> ID {
         let id = self
             .map
             .create_building(RawBuilding {
@@ -910,6 +940,7 @@ impl Model {
             })
             .unwrap();
         self.bldg_added(id, prerender);
+        ID::Building(id)
     }
 
     pub fn move_b(&mut self, id: StableBuildingID, new_center: Pt2D, prerender: &Prerender) {

map_editor/src/world.rs

@@ -123,6 +123,10 @@ impl<ID: ObjectID> World<ID> {
         }
     }
 
+    pub fn force_set_selection(&mut self, id: ID) {
+        self.current_selection = Some(id);
+    }
+
     pub fn get_selection(&self) -> Option<ID> {
         self.current_selection
     }