tight curve, nearest segment

src/main.ts

@@ -48,6 +48,7 @@ const _fullDebug: Debug = {
   bogies: false,
   angles: false,
   aabb: false,
+  segment: false,
 };
 
 const storedDebug = JSON.parse(localStorage.getItem("debug") || "0");

src/state/states/EditTrackState.ts

@@ -14,6 +14,8 @@ import {
   SBendLeft,
   SBendRight,
   StraightTrack,
+  TightBankLeft,
+  TightBankRight,
   WideBankLeft,
   WideBankRight,
 } from "../../track/shapes.ts";
@@ -285,6 +287,8 @@ export class EditTrackState extends State<States> {
       new BankRight(),
       new WideBankLeft(),
       new WideBankRight(),
+      new TightBankLeft(),
+      new TightBankRight(),
     ]);
 
     const inputManager = getContextItem<InputManager>("inputManager");

src/state/states/RunningState.ts

@@ -85,7 +85,10 @@ export class RunningState extends State<States> {
     // this.activeTr0ain = train;
     // const trainCount = 1000;
     // for (let i = 0; i < trainCount; i++) {
-    //   const train = new Train(track.path, [new LargeLady(), new Tender()]);
+    //   const train = new Train(track.path, [
+    //     new LargeLady(),
+    //     new LargeLadyTender(),
+    //   ]);
     //   ctx.trains.push(train);
     // }
 

src/track/shapes.ts

@@ -88,6 +88,58 @@ export class WideBankLeft extends TrackSegment {
     ]);
   }
 }
+export class TightBankLeft extends TrackSegment {
+  constructor(start?: Vector) {
+    start = start || new Vector(100, 100);
+
+    const p1 = start.copy();
+    const p2 = start.copy();
+    const p3 = start.copy();
+    const p4 = start.copy();
+    const scale = 61.57;
+
+    p2.add(new Vector(1, 0).mult(scale));
+    p3.set(p2);
+    const dirToP3 = Vector.fromAngle(-Math.PI / 12).mult(scale);
+    p3.add(dirToP3);
+    p4.set(p3);
+    const dirToP4 = Vector.fromAngle(-Math.PI / 6).mult(scale);
+    p4.add(dirToP4);
+
+    super([
+      p1,
+      p2,
+      p3,
+      p4,
+    ]);
+  }
+}
+export class TightBankRight extends TrackSegment {
+  constructor(start?: Vector) {
+    start = start || new Vector(100, 100);
+
+    const p1 = start.copy();
+    const p2 = start.copy();
+    const p3 = start.copy();
+    const p4 = start.copy();
+    const scale = 61.57;
+
+    p2.add(new Vector(1, 0).mult(scale));
+    p3.set(p2);
+    const dirToP3 = Vector.fromAngle(Math.PI / 12).mult(scale);
+    p3.add(dirToP3);
+    p4.set(p3);
+    const dirToP4 = Vector.fromAngle(Math.PI / 6).mult(scale);
+    p4.add(dirToP4);
+
+    super([
+      p1,
+      p2,
+      p3,
+      p4,
+    ]);
+  }
+}
 export class WideBankRight extends TrackSegment {
   constructor(start?: Vector) {
     start = start || new Vector(100, 100);

src/track/system.ts

@@ -2,12 +2,14 @@ import { Doodler, Point, Vector } from "@bearmetal/doodler";
 import { ComplexPath, PathSegment } from "../math/path.ts";
 import { getContextItem, setDefaultContext } from "../lib/context.ts";
 import { clamp } from "../math/clamp.ts";
+import { Debuggable } from "../lib/debuggable.ts";
 
-export class TrackSystem {
+export class TrackSystem extends Debuggable {
   private _segments: Map<string, TrackSegment> = new Map();
   private doodler: Doodler;
 
   constructor(segments: TrackSegment[]) {
+    super("track");
     this.doodler = getContextItem<Doodler>("doodler");
     for (const segment of segments) {
       this._segments.set(segment.id, segment);
@@ -26,6 +28,19 @@ export class TrackSystem {
     return this._segments.values().toArray().pop();
   }
 
+  getNearestSegment(pos: Vector) {
+    let minDistance = Infinity;
+    let nearestSegment: TrackSegment | undefined;
+    for (const segment of this._segments.values()) {
+      const distance = segment.getDistanceTo(pos);
+      if (distance < minDistance) {
+        minDistance = distance;
+        nearestSegment = segment;
+      }
+    }
+    return nearestSegment;
+  }
+
   optimize(percent: number) {
     console.log("Optimizing track", percent * 100 / 4);
     for (const segment of this._segments.values()) {
@@ -85,6 +100,15 @@ export class TrackSystem {
     // }
   }
 
+  override debugDraw(): void {
+    const debug = getContextItem("debug");
+    if (debug.track) {
+      for (const segment of this._segments.values()) {
+        segment.drawAABB();
+      }
+    }
+  }
+
   ends: Map<TrackSegment, [End, End]> = new Map();
   endArray: End[] = [];
 
@@ -293,6 +317,10 @@ export class TrackSegment extends PathSegment {
     this.update();
   }
 
+  getDistanceTo(pos: Vector) {
+    return Vector.dist(this.aabb.center, pos);
+  }
+
   updateAABB() {
     let minX = Infinity;
     let maxX = -Infinity;
@@ -435,8 +463,9 @@ export class TrackSegment extends PathSegment {
     //   color: "red",
     //   weight: 3,
     // });
-    const debug = getContextItem("debug");
-    if (debug.track) {
+  }
+
+  drawAABB() {
     this.doodler.drawRect(this.aabb.pos, this.aabb.width, this.aabb.height, {
       color: "lime",
     });
@@ -444,7 +473,6 @@ export class TrackSegment extends PathSegment {
       color: "cyan",
     });
   }
-  }
 
   serialize(): SerializedTrackSegment {
     return {

src/types.ts

@@ -18,6 +18,7 @@ declare global {
 
   type Debug = {
     track: boolean;
+    segment: boolean;
     train: boolean;
     car: boolean;
     path: boolean;