Hide train sprites initially to avoid flash

package-lock.json

@@ -12769,16 +12769,6 @@
         "errno": "0.1.7"
       }
     },
-    "worker-loader": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/worker-loader/-/worker-loader-1.1.1.tgz",
-      "integrity": "sha512-qJZLVS/jMCBITDzPo/RuweYSIG8VJP5P67mP/71alGyTZRe1LYJFdwLjLalY3T5ifx0bMDRD3OB6P2p1escvlg==",
-      "dev": true,
-      "requires": {
-        "loader-utils": "1.1.0",
-        "schema-utils": "0.4.5"
-      }
-    },
     "wrap-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",

package.json

@@ -41,8 +41,7 @@
     "uglifyjs-webpack-plugin": "^1.2.4",
     "webpack": "^4.4.1",
     "webpack-cli": "^2.0.13",
-    "webpack-dev-server": "^3.1.1",
-    "worker-loader": "^1.1.1"
+    "webpack-dev-server": "^3.1.1"
   },
   "dependencies": {
     "@types/pixi.js": "^4.7.2",

src/Line.ts

@@ -5,13 +5,17 @@ import LineConnection from './LineConnection';
 import Station from './Station';
 import { distance, randomInt, randomPoint } from './utils';
 
+const CONNECTION_RADIUS = Math.floor(Math.sqrt(
+  Math.pow(window.innerWidth, 2) + Math.pow(window.innerHeight, 2),
+) / 8);
+
 export default class Line {
   public name: string;
-  public color: ColorFormats.RGBA;
+  public color: tinycolorInstance;
 
   constructor(
     name: string,
-    color: ColorFormats.RGBA,
+    color: tinycolorInstance,
   ) {
     this.name = name;
     this.color = color;
@@ -22,14 +26,13 @@ export default class Line {
     stations: Station[],
     visitedStations: Station[],
     connectionLimit: number,
-    connectionRadius: number,
   ) {
     visitedStations.push(currentStation);
     const otherStations = stations.filter(station => station !== currentStation);
     const closeStations = Station.stationsWithinRadius(
       otherStations,
       currentStation.location,
-      connectionRadius,
+      CONNECTION_RADIUS,
     );
     for (let i = 0; i < connectionLimit; i += 1) {
       if (closeStations.length < 1) {
@@ -48,7 +51,6 @@ export default class Line {
           stations,
           visitedStations,
           connectionLimit,
-          connectionRadius,
         );
       }
     }

src/LineConnection.ts

@@ -1,11 +1,9 @@
 import Line from './Line';
-import Signal from './Signal';
 import Station from './Station';
 
 export default class LineConnection {
-  public line: Line;
-  public signals: Signal[];
   public station: Station;
+  public line: Line;
 
   constructor(
     station: Station,

src/Station.ts

@@ -1,4 +1,3 @@
-import Point from 'pixi.js/lib/core/math/Point';
 import * as tinycolor from 'tinycolor2';
 
 import Direction, { getPointDirection } from './Direction';
@@ -19,23 +18,23 @@ export default class Station {
     return largest;
   }
 
-  public static stationsWithinRadius(stations: Station[], point: Point,
+  public static stationsWithinRadius(stations: Station[], point: PIXI.Point,
                                      radius: number): Station[] {
     return stations.filter(station => distance(point, station.location) <= radius);
   }
 
-  public static stationsInDirection(stations: Station[], point: Point,
+  public static stationsInDirection(stations: Station[], point: PIXI.Point,
                                     direction: Direction): Station[] {
     return stations.filter(station => getPointDirection(point, station.location) === direction);
   }
 
-  public static closestStation(stations: Station[], point: Point): Station {
+  public static closestStation(stations: Station[], point: PIXI.Point): Station {
     return stations.reduce(
       (prev, curr) => distance(point, prev.location) < distance(point, curr.location) ? prev : curr,
     );
   }
 
-  public static randomCloseLargeStation(stations: Station[], point: Point,
+  public static randomCloseLargeStation(stations: Station[], point: PIXI.Point,
                                         radius: number): Station {
     const closeStations = Station.stationsWithinRadius(stations, point,
                                                        radius);
@@ -43,7 +42,7 @@ export default class Station {
     return weightedRandom(closeStations, closeStationWeights);
   }
 
-  public static isPointDistant(point: Point, stations: Station[],
+  public static isPointDistant(point: PIXI.Point, stations: Station[],
                                minDistance: number): boolean {
     for (const station of stations) {
       if (distance(point, station.location) < minDistance) {
@@ -53,15 +52,10 @@ export default class Station {
     return true;
   }
 
-  public static randomDistantPoint(
-    stations: Station[],
-    minDistance: number,
-    height: number,
-    width: number,
-  ): Point | null {
+  public static randomDistantPoint(stations: Station[], minDistance: number): PIXI.Point | null {
     let tries = 100;
     while (tries > 0) {
-      const point = randomPoint(height, width);
+      const point = randomPoint();
       if (Station.isPointDistant(point, stations, minDistance)) {
         return point;
       }
@@ -70,16 +64,19 @@ export default class Station {
     return null;
   }
 
-  public location: Point;
+  public location: PIXI.Point;
   public population: number;
   public connections: LineConnection[];
   public id: number;
-  public color: ColorFormats.RGBA;
+  public label: PIXI.Text;
+  public color: tinycolorInstance;
+
+  private textStyle: object;
 
   constructor(
-    location: Point,
+    location: PIXI.Point,
     population: number,
-    color: ColorFormats.RGBA,
+    color: tinycolorInstance,
     connections?: LineConnection[],
   ) {
     this.location = location;
@@ -90,5 +87,15 @@ export default class Station {
     // for debugging
     stationCount += 1;
     this.id = stationCount;
+    this.textStyle = {
+      fill: '#FFA500',
+      fontFamily: 'monospace',
+      fontSize: '12px',
+    };
+    this.renderLabel();
+  }
+
+  public renderLabel() {
+    this.label = new PIXI.Text(`${this.id}`, this.textStyle);
   }
 }

src/Station.worker.ts

@@ -1,60 +0,0 @@
-import * as tinycolor from 'tinycolor2';
-
-import Line from './Line';
-import Station from './Station';
-import { randomInt } from './utils';
-
-const LINE_CONNECTION_LIMIT = 5;
-const ctx: Worker = self as any;
-
-const initStations = (numStations: number, height: number, width: number): Station[] => {
-  const stations: Station[] = [];
-  for (let i = 0; i < numStations; i += 1) {
-    stations.push(new Station(
-      Station.randomDistantPoint(stations, 30, height, width),
-      randomInt(300, 2000),
-      tinycolor.random().toRgb()));
-  }
-  return stations;
-};
-
-const initLines = (numLines: number, stations: Station[], connectionRadius: number): Line[] => {
-  const lines = [];
-  for (let i = 0; i < numLines; i += 1) {
-    let color = tinycolor.random();
-    while (color.isDark()) {
-      color = tinycolor.random();
-    }
-    const lineColor = color.toRgb();
-    const stationsWithoutConnections = stations.filter(station =>
-      station.connections.length === 0,
-    );
-    let centralHub: Station;
-    if (stationsWithoutConnections.length > 0) {
-      centralHub = Station.largestStation(stationsWithoutConnections);
-    } else {
-      centralHub = stations[randomInt(0, stations.length - 1)];
-    }
-    const line = new Line(`line-${i}`, lineColor);
-    const stationsLeft = stations.slice(0);
-    line.connectStations(centralHub, stationsLeft, [], LINE_CONNECTION_LIMIT, connectionRadius);
-    lines.push(line);
-  }
-  return lines;
-};
-
-ctx.addEventListener('message', (event: MessageEvent) => {
-  if ('initStations' in event.data) {
-    const { connectionRadius, height, numLines, numStations, width } = event.data.initStations;
-    let stations: Station[] = [];
-    let lines: Line[] = [];
-    let stationsWithConnections: Station[] = [];
-    while (stationsWithConnections.length === 0) {
-      // If all stations are too far away to connect, try generating again
-      stations = initStations(numStations, height, width);
-      lines = initLines(numLines, stations, connectionRadius);
-      stationsWithConnections = stations.filter(station => station.connections.length > 0);
-    }
-    ctx.postMessage({ stations, lines });
-  }
-});

src/Train.ts

@@ -1,4 +1,3 @@
-import Point from 'pixi.js/lib/core/math/Point';
 import * as tinycolor from 'tinycolor2';
 
 import Station from './Station';
@@ -6,23 +5,25 @@ import Station from './Station';
 let trainCount = 0;
 
 export default class Train {
-  public location: Point;
+  public location: PIXI.Point;
   public speed: number;
   public origin: Station;
   public destination: Station;
   public passengers: number;
   public id: number;
-  public color: ColorFormats.RGBA;
+  public label: PIXI.Text;
+  public color: tinycolorInstance;
+  public sprite: PIXI.Sprite;
 
   private textStyle: object;
 
   constructor(
-    location: Point,
+    location: PIXI.Point,
     speed: number,
     passengers: number,
     origin: Station,
     destination: Station,
-    color: ColorFormats.RGBA,
+    color: tinycolorInstance,
   ) {
     this.location = location;
     this.speed = speed;
@@ -31,8 +32,26 @@ export default class Train {
     this.passengers = passengers;
     this.color = color;
 
+    this.sprite = new PIXI.Sprite(PIXI.loader.resources.nodeImg.texture);
+    this.sprite.visible = false;
+
     // for debugging
     trainCount += 1;
     this.id = trainCount;
+    this.textStyle = {
+      fill: '#AEAEAE',
+      fontFamily: 'monospace',
+      fontSize: '12px',
+    };
+    this.renderLabel();
+  }
+
+  public boardPassengers() {
+    if (this.location === this.origin.location) { // about to leave a station
+    }
+  }
+
+  public renderLabel() {
+    this.label = new PIXI.Text(`${this.id}`, this.textStyle);
   }
 }

src/Train.worker.ts

@@ -1,116 +0,0 @@
-import Point from 'pixi.js/lib/core/math/Point';
-import * as tinycolor from 'tinycolor2';
-
-import Station from './Station';
-import Train from './Train';
-import { distance, pointsAlmostEqual, randomInt, weightedRandom } from './utils';
-
-// TODO: define these in a common constants file
-const MAX_SPEED = 10.0;
-const ACCELERATION = 0.025;
-const APPROACH_DISTANCE = 3.0;
-const TRAIN_CAPACITY = 50;
-
-const ctx: Worker = self as any;
-
-let stations: Station[] = [];
-let trains: Train[] = [];
-
-const initTrains = (numTrains: number, stations: Station[]): Train[] => {
-  const trains = [];
-  const stationsWithConnections = stations.filter(station => station.connections.length > 0);
-  for (let i = 0; i < numTrains; i += 1) {
-    const originStation = stationsWithConnections[
-      Math.floor(Math.random() * stationsWithConnections.length)
-    ];
-    trains.push(new Train(
-      new Point(originStation.location.x, originStation.location.y),
-      0, 0, originStation, undefined, tinycolor('grey').toRgb()),
-    );
-  }
-  return trains;
-};
-
-const moveTrains = (trains: Train[], stations: Station[]) => {
-  for (const train of trains) {
-    if (train.origin.connections.length === 0) {
-      // train is stuck at an orphaned station
-      continue;
-    }
-    // choose a destination randomly with a bias towards larger stations
-    if (train.destination === undefined) {
-      const otherStations = train.origin.connections.map(conn => conn.station);
-      const closeStationWeights = otherStations.map(station => station.population);
-      train.destination = weightedRandom(otherStations, closeStationWeights);
-
-      // board passengers
-      const boardingPassengers = randomInt(0, Math.min(TRAIN_CAPACITY - train.passengers,
-                                                       train.origin.population));
-      // set or mix train color with the color of new passenger origin
-      if (train.passengers === 0) {
-        train.color = train.origin.color;
-      } else {
-        train.color = tinycolor.mix(
-          train.color,
-          train.origin.color,
-          Math.round((boardingPassengers / train.passengers) * 100),
-        ).toRgb();
-      }
-      train.passengers += boardingPassengers;
-      train.origin.population -= boardingPassengers;
-    }
-
-    // train reached destination, stop moving and let passengers off
-    if (pointsAlmostEqual(train.location, train.destination.location)) {
-      train.speed = 0;
-
-      // average destination color with passenger color weighted by ratio
-      // (a simulation of culture mixing)
-      train.destination.color = tinycolor.mix(
-        train.destination.color,
-        train.origin.color,
-        Math.round((train.passengers / train.destination.population) * 100),
-      ).toRgb();
-
-      // transfer passengers to destination
-      const disembarkingPassengers = randomInt(0, train.passengers);
-      train.destination.population += disembarkingPassengers;
-      train.passengers -= disembarkingPassengers;
-
-      // prepare for next journey
-      train.origin = train.destination;
-      train.destination = undefined;
-      continue;
-    }
-
-    const journeyLeft = distance(train.location, train.destination.location);
-
-    if ((train.speed / ACCELERATION) >= ((journeyLeft / train.speed) - APPROACH_DISTANCE) &&
-        train.speed !== ACCELERATION) {
-      // slowing down
-      train.speed -= ACCELERATION;
-    } else if (train.speed < MAX_SPEED) {
-      // speeding up
-      train.speed += ACCELERATION;
-    }
-
-    // advance train
-    const progress = train.speed / journeyLeft;
-    train.location.x += ((train.destination.location.x - train.location.x) * progress);
-    train.location.y += ((train.destination.location.y - train.location.y) * progress);
-  }
-};
-
-ctx.addEventListener('message', (event: MessageEvent) => {
-  if ('initTrains' in event.data) {
-    const { numTrains } = event.data.initTrains;
-    stations = event.data.initTrains.stations;
-    trains = initTrains(numTrains, stations);
-    ctx.postMessage({ initTrains: trains });
-  } else if ('moveTrains' in event.data) {
-    // trains = event.data.moveTrains.trains;
-    // stations = event.data.moveTrains.stations;
-    moveTrains(trains, stations);
-    ctx.postMessage({ moveTrains: trains });
-  }
-});

src/transport.ts

@@ -6,20 +6,18 @@ import * as tinycolor from 'tinycolor2';
 import Direction from './Direction';
 import Line from './Line';
 import Station from './Station';
-import StationWorker from 'worker-loader!./Station.worker';
 import Train from './Train';
 import { distance, pointsAlmostEqual, pointsEqual, randomInt, randomPoint,
          rangeMap, weightedRandom } from './utils';
-import TrainWorker from 'worker-loader!./Train.worker';
 
 import * as imgNode from './node.png';
 import './style.css';
 
 const NODE_RES = 100;
 
-const CONNECTION_RADIUS = Math.floor(Math.sqrt(
-  Math.pow(window.innerWidth, 2) + Math.pow(window.innerHeight, 2),
-) / 8);
+const MAX_SPEED = 10.0;
+const ACCELERATION = 0.025;
+const APPROACH_DISTANCE = 3.0;
 const TRAIN_CAPACITY = 50;
 const LINE_CONNECTION_LIMIT = 5;
 const WORLD_WIDTH = 1000;
@@ -31,49 +29,162 @@ const ZOOM_MAX_HEIGHT = 4000;
 
 const trainTexts: PIXI.Text[] = [];
 
-const drawStations = (stations: Station[], stationLabels: PIXI.Text[], graphics: PIXI.Graphics) => {
-  stations.forEach((station, i) => {
-    const radius = station.population / 150;
-    const color = tinycolor(station.color);
-    graphics.beginFill(parseInt(color.toHex(), 16), 0.5);
-    graphics.drawCircle(station.location.x, station.location.y, radius);
-    graphics.endFill();
-    stationLabels[i].x = station.location.x + radius + 1;
-    stationLabels[i].y = station.location.y + radius + 1;
-  });
+const initStations = (numStations: number): Station[] => {
+  const stations: Station[] = [];
+  for (let i = 0; i < numStations; i += 1) {
+    stations.push(new Station(
+      Station.randomDistantPoint(stations, 30),
+      randomInt(300, 2000),
+      tinycolor.random()));
+  }
+  return stations;
 };
 
-const drawTrains = (
-  trains: Train[],
-  trainLabels: PIXI.Text[],
-  trainSprites: PIXI.Sprite[],
-  graphics: PIXI.Graphics,
-) => {
-  trains.forEach((train, i) => {
+const initTrains = (numTrains: number, stations: Station[]): Train[] => {
+  const trains = [];
+  const stationsWithConnections = stations.filter(station => station.connections.length > 0);
+  for (let i = 0; i < numTrains; i += 1) {
+    const originStation = stationsWithConnections[
+      Math.floor(Math.random() * stationsWithConnections.length)
+    ];
+    trains.push(new Train(
+      new PIXI.Point(originStation.location.x, originStation.location.y),
+      0, 0, originStation, undefined, tinycolor('grey')),
+    );
+  }
+  return trains;
+};
+
+const initLines = (numLines: number, stations: Station[]): Line[] => {
+  const lines = [];
+  for (let i = 0; i < numLines; i += 1) {
+    let color = tinycolor.random();
+    while (color.isDark()) {
+      color = tinycolor.random();
+    }
+    const stationsWithoutConnections = stations.filter(station =>
+      station.connections.length === 0,
+    );
+    let centralHub: Station;
+    if (stationsWithoutConnections.length > 0) {
+      centralHub = Station.largestStation(stationsWithoutConnections);
+    } else {
+      centralHub = stations[randomInt(0, stations.length - 1)];
+    }
+    const line = new Line(`line-${i}`, tinycolor.random());
+    const stationsLeft = stations.slice(0);
+    line.connectStations(centralHub, stationsLeft, [], LINE_CONNECTION_LIMIT);
+    lines.push(line);
+  }
+  return lines;
+};
+
+const moveTrains = (trains: Train[], stations: Station[]) => {
+  for (const train of trains) {
+    if (train.origin.connections.length === 0) {
+      // train is stuck at an orphaned station
+      continue;
+    }
+    // choose a destination randomly with a bias towards larger stations
+    if (train.destination === undefined) {
+      const otherStations = train.origin.connections.map(conn => conn.station);
+      const closeStationWeights = otherStations.map(station => station.population);
+      train.destination = weightedRandom(otherStations, closeStationWeights);
+
+      // board passengers
+      const boardingPassengers = randomInt(0, Math.min(TRAIN_CAPACITY - train.passengers,
+                                                       train.origin.population));
+      // set or mix train color with the color of new passenger origin
+      if (train.passengers === 0) {
+        train.color = train.origin.color;
+      } else {
+        train.color = tinycolor.mix(
+          train.color,
+          train.origin.color,
+          Math.round((boardingPassengers / train.passengers) * 100),
+        );
+      }
+      train.passengers += boardingPassengers;
+      train.origin.population -= boardingPassengers;
+    }
+
+    // train reached destination, stop moving and let passengers off
+    if (pointsAlmostEqual(train.location, train.destination.location)) {
+      train.speed = 0;
+
+      // average destination color with passenger color weighted by ratio
+      // (a simulation of culture mixing)
+      train.destination.color = tinycolor.mix(
+        train.destination.color,
+        train.origin.color,
+        Math.round((train.passengers / train.destination.population) * 100),
+      );
+
+      // transfer passengers to destination
+      const disembarkingPassengers = randomInt(0, train.passengers);
+      train.destination.population += disembarkingPassengers;
+      train.passengers -= disembarkingPassengers;
+
+      // prepare for next journey
+      train.origin = train.destination;
+      train.destination = undefined;
+      continue;
+    }
+
+    const journeyLeft = distance(train.location, train.destination.location);
+
+    if ((train.speed / ACCELERATION) >= ((journeyLeft / train.speed) - APPROACH_DISTANCE) &&
+        train.speed !== ACCELERATION) {
+      // slowing down
+      train.speed -= ACCELERATION;
+    } else if (train.speed < MAX_SPEED) {
+      // speeding up
+      train.speed += ACCELERATION;
+    }
+
+    // advance train
+    const progress = train.speed / journeyLeft;
+    train.location.x += ((train.destination.location.x - train.location.x) * progress);
+    train.location.y += ((train.destination.location.y - train.location.y) * progress);
+  }
+};
+
+const drawStations = (stations: Station[], graphics: PIXI.Graphics) => {
+  for (const station of stations) {
+    const radius = station.population / 150;
+    graphics.beginFill(parseInt(station.color.toHex(), 16), 0.5);
+    graphics.drawCircle(station.location.x, station.location.y, radius);
+    graphics.endFill();
+    station.label.x = station.location.x + radius + 1;
+    station.label.y = station.location.y + radius + 1;
+  }
+};
+
+const drawTrains = (trains: Train[], graphics: PIXI.Graphics) => {
+  for (const train of trains) {
     const trainSize = rangeMap(train.passengers, 0, TRAIN_CAPACITY, 1, 5);
     const scale = trainSize / NODE_RES;
-    const color = tinycolor(train.color);
-    trainSprites[i].x = train.location.x;
-    trainSprites[i].y = train.location.y;
-    trainSprites[i].scale.x = scale;
-    trainSprites[i].scale.y = scale;
-    trainSprites[i].tint = parseInt(color.toHex(), 16);
-    trainLabels[i].x = train.location.x + scale + 1;
-    trainLabels[i].y = train.location.y + scale + 1;
-  });
+    train.sprite.visible = true;
+    train.sprite.x = train.location.x;
+    train.sprite.y = train.location.y;
+    train.sprite.scale.x = scale;
+    train.sprite.scale.y = scale;
+    train.sprite.tint = parseInt(train.color.toHex(), 16);
+    train.label.x = train.location.x + scale + 1;
+    train.label.y = train.location.y + scale + 1;
+  }
 };
 
 const drawLines = (stations: Station[], graphics: PIXI.Graphics) => {
   for (const station of stations) {
     for (const connection of station.connections) {
-      const color = tinycolor(connection.line.color);
       let twoWay = false;
       for (const conn of connection.station.connections) {
         if (conn.station === station) {
           twoWay = true;
         }
       }
-      graphics.lineStyle(twoWay ? 2 : 1, parseInt(color.toHex(), 16), 1);
+      graphics.lineStyle(twoWay ? 2 : 1, parseInt(connection.line.color.toHex(), 16), 1);
       graphics.moveTo(station.location.x, station.location.y);
       graphics.lineTo(connection.station.location.x, connection.station.location.y);
     }
@@ -100,85 +211,28 @@ const run = () => {
 
   let stations: Station[] = [];
   let lines: Line[] = [];
-  let trains: Train[] = [];
-  const stationLabels: PIXI.Text[] = [];
-  const trainLabels: PIXI.Text[] = [];
-  const trainSprites: PIXI.Sprite[] = [];
-  const stationWorker = new StationWorker();
-  const trainWorker = new TrainWorker();
-
-  stationWorker.postMessage({ initStations: {
-    connectionRadius: CONNECTION_RADIUS,
-    height: window.innerHeight,
-    numLines: 4,
-    numStations: 30,
-    width: window.innerWidth,
-  }});
-  stationWorker.onmessage = (event: MessageEvent) => {
-    stations = event.data.stations;
-    lines = event.data.lines;
-    console.log(stations);
-    console.log(lines);
-
-    trainWorker.postMessage({ initTrains: {
-      stations,
-
-      numTrains: 50,
-    }});
-    trainWorker.onmessage = (trainEvent: MessageEvent) => {
-      if ('initTrains' in trainEvent.data) {
-        trains = trainEvent.data.initTrains;
-
-        // add train sprites
-        for (const train of trains) {
-          const sprite = new PIXI.Sprite(PIXI.loader.resources.nodeImg.texture);
-          sprite.visible = false;
-          trainSprites.push(sprite);
-          viewport.addChild(sprite);
-        }
-        // Add debug labels
-        for (const train of trains) {
-          const label = new PIXI.Text(
-            `${train.id}`, {
-              fill: '#AEAEAE',
-              fontFamily: 'monospace',
-              fontSize: '12px',
-            },
-          );
-          trainLabels.push(label);
-          viewport.addChild(label);
-        }
-      } else if ('moveTrains' in trainEvent.data) {
-        trains = trainEvent.data.moveTrains;
-      }
-    };
-
-    for (const station of stations) {
-      const label = new PIXI.Text(
-        `${station.id}`, {
-          fill: '#FFA500',
-          fontFamily: 'monospace',
-          fontSize: '12px',
-        },
-      );
-      stationLabels.push(label);
-      viewport.addChild(label);
-    }
-  };
+  let stationsWithConnections: Station[] = [];
+  while (stationsWithConnections.length === 0) {
+    // If all stations are too far away to connect, try generating again
+    stations = initStations(30);
+    lines = initLines(4, stations);
+    stationsWithConnections = stations.filter(station => station.connections.length > 0);
+  }
+  const trains = initTrains(50, stations);
 
   ticker.stop();
   ticker.add((deltaTime) => {
     stats.begin();
 
-    trainWorker.postMessage({ moveTrains: {} });
+    moveTrains(trains, stations);
 
     graphics.clear();
 
     graphics.lineStyle(1, 0xFFA500, 1);
-    drawStations(stations, stationLabels, graphics);
+    drawStations(stations, graphics);
 
     graphics.lineStyle(1, 0xAEAEAE, 1);
-    drawTrains(trains, trainLabels, trainSprites, graphics);
+    drawTrains(trains, graphics);
 
     drawLines(stations, graphics);
 
@@ -187,6 +241,17 @@ const run = () => {
   ticker.start();
 
   viewport.addChild(graphics);
+  // add train sprites
+  for (const train of trains) {
+    viewport.addChild(train.sprite);
+  }
+  // Add debug labels
+  for (const train of trains) {
+    viewport.addChild(train.label);
+  }
+  for (const station of stations) {
+    viewport.addChild(station.label);
+  }
   document.body.appendChild(app.view);
   app.stage.addChild(viewport);
   viewport.drag().pinch().wheel().clampZoom({

src/utils.ts

@@ -1,4 +1,4 @@
-import Point from 'pixi.js/lib/core/math/Point';
+import * as PIXI from 'pixi.js';
 
 const EPSILON = 1.0;
 
@@ -19,20 +19,20 @@ export const weightedRandom = (choices: any[], weights: number[]): any => {
   }
 };
 
-export const randomPoint = (height: number, width: number): Point => (
-  new Point(randomInt(0, width), randomInt(0, height))
+export const randomPoint = () => (
+  new PIXI.Point(randomInt(0, window.innerWidth), randomInt(0, window.innerHeight))
 );
 
-export const pointsEqual = (pointA: Point, pointB: Point): boolean => (
+export const pointsEqual = (pointA: PIXI.Point, pointB: PIXI.Point): boolean => (
   (pointA.x === pointB.x && pointA.y === pointB.y)
 );
 
-export const pointsAlmostEqual = (pointA: Point, pointB: Point): boolean => (
+export const pointsAlmostEqual = (pointA: PIXI.Point, pointB: PIXI.Point): boolean => (
   Math.abs(pointA.x - pointB.x) < EPSILON &&
   Math.abs(pointA.y - pointB.y) < EPSILON
 );
 
-export const distance = (pointA: Point, pointB: Point): number => {
+export const distance = (pointA: PIXI.Point, pointB: PIXI.Point): number => {
   const distX = pointA.x - pointB.x;
   const distY = pointA.y - pointB.y;
   return Math.sqrt((distX * distX) + (distY * distY));
@@ -43,10 +43,10 @@ export const rangeMap = (num: number, inMin: number, inMax: number,
   (num - inMin) * (outMax - outMin) / (inMax - inMin) + outMin
 );
 
-export const angleRadians = (pointA: Point, pointB: Point): number => (
+export const angleRadians = (pointA: PIXI.Point, pointB: PIXI.Point): number => (
   Math.atan2(-(pointB.x - pointA.x), pointB.y - pointA.y)
 );
 
-export const angleDegrees = (pointA: Point, pointB: Point): number => (
+export const angleDegrees = (pointA: PIXI.Point, pointB: PIXI.Point): number => (
   180 + angleRadians(pointA, pointB) * (180 / Math.PI)
 );

typings/custom.d.ts

@@ -1,17 +1 @@
 declare module '*.png';
-
-declare module 'worker-loader!*' {
-  class WebpackWorker extends Worker {
-    constructor();
-  }
-
-  export default WebpackWorker;
-}
-
-declare module 'pixi.js/lib/core/math/Point' {
-  export default PIXI.Point;
-}
-
-declare module 'pixi.js/lib/core/text/Text' {
-  export default PIXI.Text;
-}