1 line
34 KiB
Plaintext
1 line
34 KiB
Plaintext
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number): number => (\n (num - inMin) * (outMax - outMin) / (inMax - inMin) + outMin\n);\n\nexport const angleRadians = (pointA: PIXI.Point, pointB: PIXI.Point): number => (\n Math.atan2(-(pointB.x - pointA.x), pointB.y - pointA.y)\n);\n\nexport const angleDegrees = (pointA: PIXI.Point, pointB: PIXI.Point): number => (\n 180 + angleRadians(pointA, pointB) * (180 / Math.PI)\n);\n","import * as PIXI from 'pixi.js';\n\nimport { angleDegrees } from './utils';\n\nenum Direction {\n North, // 0\n Northeast, // 1\n East, // 2\n Southeast, // 3\n South, // 4\n Southwest, // 5\n West, // 6\n Northwest, // 7\n}\n\nexport const getPointDirection = (pointA: PIXI.Point, pointB: PIXI.Point): Direction => {\n const angle = angleDegrees(pointA, pointB);\n let direction = null;\n if (angle >= 337.5 || angle < 22.5) {\n direction = Direction.North;\n } else if (angle >= 22.5 && angle < 67.5) {\n direction = Direction.Northeast;\n } else if (angle >= 67.5 && angle < 112.5) {\n direction = Direction.East;\n } else if (angle >= 112.5 && angle < 157.5) {\n direction = Direction.Southeast;\n } else if (angle >= 157.5 && angle < 202.5) {\n direction = Direction.South;\n } else if (angle >= 202.5 && angle < 247.5) {\n direction = Direction.Southwest;\n } else if (angle >= 247.5 && angle < 292.5) {\n direction = Direction.West;\n } else if (angle >= 292.5 && angle < 337.5) {\n direction = Direction.Northwest;\n } else {\n throw Error('Angle between points is not a valid degree');\n }\n return direction;\n};\n\nexport default Direction;\n","import * as tinycolor from 'tinycolor2';\n\nimport Direction, { getPointDirection } from './Direction';\nimport LineConnection from './LineConnection';\nimport { distance, randomPoint, weightedRandom } from './utils';\n\nlet stationCount = 0;\n\nexport default class Station {\n // Utility methods for working with arrays of Stations\n public static largestStation(stations: Station[]): Station {\n let largest: Station = null;\n for (const station of stations) {\n if (largest === null || station.population > largest.population) {\n largest = station;\n }\n }\n return largest;\n }\n\n public static stationsWithinRadius(stations: Station[], point: PIXI.Point,\n radius: number): Station[] {\n return stations.filter(station => distance(point, station.location) <= radius);\n }\n\n public static stationsInDirection(stations: Station[], point: PIXI.Point,\n direction: Direction): Station[] {\n return stations.filter(station => getPointDirection(point, station.location) === direction);\n }\n\n public static closestStation(stations: Station[], point: PIXI.Point): Station {\n return stations.reduce(\n (prev, curr) => distance(point, prev.location) < distance(point, curr.location) ? prev : curr,\n );\n }\n\n public static randomCloseLargeStation(stations: Station[], point: PIXI.Point,\n radius: number): Station {\n const closeStations = Station.stationsWithinRadius(stations, point,\n radius);\n const closeStationWeights = closeStations.map(station => station.population);\n return weightedRandom(closeStations, closeStationWeights);\n }\n\n public static isPointDistant(point: PIXI.Point, stations: Station[],\n minDistance: number): boolean {\n for (const station of stations) {\n if (distance(point, station.location) < minDistance) {\n return false;\n }\n }\n return true;\n }\n\n public static randomDistantPoint(stations: Station[], minDistance: number): PIXI.Point | null {\n let tries = 100;\n while (tries > 0) {\n const point = randomPoint();\n if (Station.isPointDistant(point, stations, minDistance)) {\n return point;\n }\n tries -= 1;\n }\n return null;\n }\n\n public location: PIXI.Point;\n public population: number;\n public connections: LineConnection[];\n public id: number;\n public label: PIXI.Text;\n public color: tinycolorInstance;\n\n constructor(\n location: PIXI.Point,\n population: number,\n color: tinycolorInstance,\n connections?: LineConnection[],\n ) {\n this.location = location;\n this.population = population;\n this.color = color;\n this.connections = connections || [];\n\n // for debugging\n stationCount += 1;\n this.id = stationCount;\n this.label = new PIXI.Text(`${this.id}`, {\n fill: '#FFA500',\n fontFamily: 'monospace',\n fontSize: '12px',\n });\n }\n}\n","import * as tinycolor from 'tinycolor2';\n\nimport Direction, { getPointDirection } from './Direction';\nimport LineConnection from './LineConnection';\nimport Station from './Station';\nimport { distance, randomInt, randomPoint } from './utils';\n\nconst CONNECTION_RADIUS = Math.floor(Math.sqrt(\n Math.pow(window.innerWidth, 2) + Math.pow(window.innerHeight, 2),\n) / 8);\n\nexport default class Line {\n public name: string;\n public color: tinycolorInstance;\n\n constructor(\n name: string,\n color: tinycolorInstance,\n ) {\n this.name = name;\n this.color = color;\n }\n\n public connectStations(\n currentStation: Station,\n stations: Station[],\n visitedStations: Station[],\n connectionLimit: number,\n ) {\n visitedStations.push(currentStation);\n const otherStations = stations.filter(station => station !== currentStation);\n const closeStations = Station.stationsWithinRadius(\n otherStations,\n currentStation.location,\n CONNECTION_RADIUS,\n );\n for (let i = 0; i < connectionLimit; i += 1) {\n if (closeStations.length < 1) {\n break;\n }\n const largest = Station.largestStation(closeStations);\n currentStation.connections.push(\n new LineConnection(largest, this),\n );\n closeStations.splice(closeStations.indexOf(largest), 1);\n }\n for (const connectedStation of currentStation.connections) {\n if (visitedStations.indexOf(connectedStation.station) === -1) {\n this.connectStations(\n connectedStation.station,\n stations,\n visitedStations,\n connectionLimit,\n );\n }\n }\n }\n}\n","import * as tinycolor from 'tinycolor2';\n\nimport Station from './Station';\n\nlet trainCount = 0;\n\nexport default class Train {\n public location: PIXI.Point;\n public speed: number;\n public origin: Station;\n public destination: Station;\n public passengers: number;\n public id: number;\n public label: PIXI.Text;\n public color: tinycolorInstance;\n public sprite: PIXI.Sprite;\n\n constructor(\n location: PIXI.Point,\n speed: number,\n passengers: number,\n origin: Station,\n destination: Station,\n color: tinycolorInstance,\n ) {\n this.location = location;\n this.speed = speed;\n this.origin = origin;\n this.destination = destination;\n this.passengers = passengers;\n this.color = color;\n\n this.sprite = new PIXI.Sprite(PIXI.loader.resources.nodeImg.texture);\n\n // for debugging\n trainCount += 1;\n this.id = trainCount;\n this.label = new PIXI.Text(`${this.id}`, {\n fill: '#AEAEAE',\n fontFamily: 'monospace',\n fontSize: '12px',\n });\n }\n\n public boardPassengers() {\n if (this.location === this.origin.location) { // about to leave a station\n }\n }\n}\n","import * as Viewport from 'pixi-viewport';\nimport * as PIXI from 'pixi.js';\nimport * as Stats from 'stats.js';\nimport * as tinycolor from 'tinycolor2';\n\nimport Direction from './Direction';\nimport Line from './Line';\nimport Station from './Station';\nimport Train from './Train';\nimport { distance, pointsAlmostEqual, pointsEqual, randomInt, randomPoint,\n rangeMap, weightedRandom } from './utils';\n\nimport * as imgNode from './node.png';\nimport './style.css';\n\nconst NODE_RES = 100;\n\nconst MAX_SPEED = 10.0;\nconst ACCELERATION = 0.025;\nconst APPROACH_DISTANCE = 3.0;\nconst TRAIN_CAPACITY = 50;\nconst LINE_CONNECTION_LIMIT = 5;\nconst WORLD_WIDTH = 1000;\nconst WORLD_HEIGHT = 1000;\nconst ZOOM_MIN_WIDTH = 100;\nconst ZOOM_MIN_HEIGHT = 100;\nconst ZOOM_MAX_WIDTH = 4000;\nconst ZOOM_MAX_HEIGHT = 4000;\n\nconst trainTexts: PIXI.Text[] = [];\n\nconst initStations = (numStations: number): Station[] => {\n const stations: Station[] = [];\n for (let i = 0; i < numStations; i += 1) {\n stations.push(new Station(\n Station.randomDistantPoint(stations, 30),\n randomInt(300, 2000),\n tinycolor.random()));\n }\n return stations;\n};\n\nconst initTrains = (numTrains: number, stations: Station[]): Train[] => {\n const trains = [];\n const stationsWithConnections = stations.filter(station => station.connections.length > 0);\n for (let i = 0; i < numTrains; i += 1) {\n const originStation = stationsWithConnections[\n Math.floor(Math.random() * stationsWithConnections.length)\n ];\n trains.push(new Train(\n new PIXI.Point(originStation.location.x, originStation.location.y),\n 0, 0, originStation, undefined, tinycolor('grey')),\n );\n }\n return trains;\n};\n\nconst initLines = (numLines: number, stations: Station[]): Line[] => {\n const lines = [];\n for (let i = 0; i < numLines; i += 1) {\n let color = tinycolor.random();\n while (color.isDark()) {\n color = tinycolor.random();\n }\n const stationsWithoutConnections = stations.filter(station =>\n station.connections.length === 0,\n );\n const centralHub = Station.largestStation(stationsWithoutConnections);\n const line = new Line(`line-${i}`, tinycolor.random());\n const stationsLeft = stations.slice(0);\n line.connectStations(centralHub, stationsLeft, [], LINE_CONNECTION_LIMIT);\n lines.push(line);\n }\n return lines;\n};\n\nconst moveTrains = (trains: Train[], stations: Station[]) => {\n for (const train of trains) {\n if (train.origin.connections.length === 0) {\n // train is stuck at an orphaned station\n continue;\n }\n // choose a destination randomly with a bias towards larger stations\n if (train.destination === undefined) {\n const otherStations = train.origin.connections.map(conn => conn.station);\n const closeStationWeights = otherStations.map(station => station.population);\n train.destination = weightedRandom(otherStations, closeStationWeights);\n\n // board passengers\n const boardingPassengers = randomInt(0, Math.min(TRAIN_CAPACITY - train.passengers,\n train.origin.population));\n // set or mix train color with the color of new passenger origin\n if (train.passengers === 0) {\n train.color = train.origin.color;\n } else {\n train.color = tinycolor.mix(\n train.color,\n train.origin.color,\n Math.round((boardingPassengers / train.passengers) * 100),\n );\n }\n train.passengers += boardingPassengers;\n train.origin.population -= boardingPassengers;\n }\n\n // train reached destination, stop moving and let passengers off\n if (pointsAlmostEqual(train.location, train.destination.location)) {\n train.speed = 0;\n\n // average destination color with passenger color weighted by ratio\n // (a simulation of culture mixing)\n train.destination.color = tinycolor.mix(\n train.destination.color,\n train.origin.color,\n Math.round((train.passengers / train.destination.population) * 100),\n );\n\n // transfer passengers to destination\n const disembarkingPassengers = randomInt(0, train.passengers);\n train.destination.population += disembarkingPassengers;\n train.passengers -= disembarkingPassengers;\n\n // prepare for next journey\n train.origin = train.destination;\n train.destination = undefined;\n continue;\n }\n\n const journeyLeft = distance(train.location, train.destination.location);\n\n if ((train.speed / ACCELERATION) >= ((journeyLeft / train.speed) - APPROACH_DISTANCE) &&\n train.speed !== ACCELERATION) {\n // slowing down\n train.speed -= ACCELERATION;\n } else if (train.speed < MAX_SPEED) {\n // speeding up\n train.speed += ACCELERATION;\n }\n\n // advance train\n const progress = train.speed / journeyLeft;\n train.location.x += ((train.destination.location.x - train.location.x) * progress);\n train.location.y += ((train.destination.location.y - train.location.y) * progress);\n }\n};\n\nconst drawStations = (stations: Station[], graphics: PIXI.Graphics) => {\n for (const station of stations) {\n const radius = station.population / 150;\n graphics.beginFill(parseInt(station.color.toHex(), 16), 0.5);\n graphics.drawCircle(station.location.x, station.location.y, radius);\n graphics.endFill();\n station.label.x = station.location.x + radius + 1;\n station.label.y = station.location.y + radius + 1;\n }\n};\n\nconst drawTrains = (trains: Train[], graphics: PIXI.Graphics) => {\n for (const train of trains) {\n const trainSize = rangeMap(train.passengers, 0, TRAIN_CAPACITY, 1, 5);\n const scale = trainSize / NODE_RES;\n train.sprite.x = train.location.x;\n train.sprite.y = train.location.y;\n train.sprite.scale.x = scale;\n train.sprite.scale.y = scale;\n train.sprite.tint = parseInt(train.color.toHex(), 16);\n train.label.x = train.location.x + scale + 1;\n train.label.y = train.location.y + scale + 1;\n }\n};\n\nconst drawLines = (stations: Station[], graphics: PIXI.Graphics) => {\n for (const station of stations) {\n for (const connection of station.connections) {\n let twoWay = false;\n for (const conn of connection.station.connections) {\n if (conn.station === station) {\n twoWay = true;\n }\n }\n graphics.lineStyle(twoWay ? 2 : 1, parseInt(connection.line.color.toHex(), 16), 1);\n graphics.moveTo(station.location.x, station.location.y);\n graphics.lineTo(connection.station.location.x, connection.station.location.y);\n }\n }\n};\n\nconst run = () => {\n const app = new PIXI.Application({\n antialias: true,\n height: window.innerHeight,\n width: window.innerWidth,\n });\n const viewport = new Viewport({\n screenHeight: window.innerHeight,\n screenWidth: window.innerWidth,\n worldHeight: WORLD_HEIGHT,\n worldWidth: WORLD_WIDTH,\n });\n const stats = new Stats();\n stats.showPanel(0);\n document.body.appendChild(stats.dom);\n const ticker = new PIXI.ticker.Ticker();\n const graphics = new PIXI.Graphics();\n\n const stations = initStations(30);\n const lines = initLines(4, stations);\n const trains = initTrains(50, stations);\n\n ticker.stop();\n ticker.add((deltaTime) => {\n stats.begin();\n\n moveTrains(trains, stations);\n\n graphics.clear();\n\n graphics.lineStyle(1, 0xFFA500, 1);\n drawStations(stations, graphics);\n\n graphics.lineStyle(1, 0xAEAEAE, 1);\n drawTrains(trains, graphics);\n\n drawLines(stations, graphics);\n\n stats.end();\n });\n ticker.start();\n\n viewport.addChild(graphics);\n // add train sprites\n for (const train of trains) {\n viewport.addChild(train.sprite);\n }\n // Add debug labels\n for (const train of trains) {\n viewport.addChild(train.label);\n }\n for (const station of stations) {\n viewport.addChild(station.label);\n }\n document.body.appendChild(app.view);\n app.stage.addChild(viewport);\n viewport.drag().pinch().wheel().clampZoom({\n maxHeight: ZOOM_MAX_HEIGHT,\n maxWidth: ZOOM_MAX_WIDTH,\n minHeight: ZOOM_MIN_HEIGHT,\n minWidth: ZOOM_MIN_WIDTH,\n }).decelerate();\n\n window.addEventListener('resize', () => {\n app.renderer.resize(window.innerWidth, window.innerHeight);\n });\n};\n\nPIXI.loader.add('nodeImg', imgNode).load(run);\n"],"sourceRoot":""} |