334 lines
8.9 KiB
JavaScript
334 lines
8.9 KiB
JavaScript
require('ol/ol.css');
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const axios = require('axios');
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const {Map, View} = require('ol');
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const TileLayer = require('ol/layer/Tile').default;
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const XYZSource = require('ol/source/XYZ').default;
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const VectorLayer = require('ol/layer/Vector').default;
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const VectorSource = require('ol/source/Vector').default;
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const {getVectorContext} = require('ol/render');
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const Feature = require('ol/Feature').default;
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const Point = require('ol/geom/Point').default;
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const LineString = require('ol/geom/LineString').default;
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const proj = require('ol/proj');
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const {Style, Fill, Stroke, Circle, Icon} = require('ol/style');
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const color = require('color');
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const mapboxToken = `pk.eyJ1IjoibWF0dGVvZGVsYWJyZSIsImEiOiJja2NxaTUyMmUwcmFhMn\
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h0NmFsdzQ3emxqIn0.cyxF0h36emIMTk3cc4VqUw`;
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const simulation = require('../tam/simulation');
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const network = require('../tam/network.json');
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const getRouteColors = routes =>
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{
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const colors = routes.filter(
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// Only consider normal routes (excluding alternate routes)
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([lineRef, routeRef]) =>
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network.lines[lineRef].routes[routeRef].state === 'normal'
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).map(([lineRef]) => network.lines[lineRef].color);
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if (colors.length >= 1)
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{
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return colors;
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}
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return ['#FFFFFF'];
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};
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const makeDataSources = () =>
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{
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const segmentsSource = new VectorSource();
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const stopsSource = new VectorSource();
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segmentsSource.addFeatures(
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Object.values(network.segments).map(({routes, points}) =>
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new Feature({
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colors: getRouteColors(routes),
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geometry: new LineString(points.map(
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({lat, lon}) => proj.fromLonLat([lon, lat])
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)),
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})
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)
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);
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stopsSource.addFeatures(
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Object.values(network.stops).map(({routes, lon, lat}) =>
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new Feature({
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colors: getRouteColors(routes),
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geometry: new Point(proj.fromLonLat([lon, lat])),
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})
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)
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);
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return {segmentsSource, stopsSource};
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};
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const makeBorderColor = mainColor =>
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{
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const hsl = color(mainColor).hsl();
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hsl.color = Math.max(0, hsl.color[2] -= 20);
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return hsl.hex();
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};
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const makeCourseColor = mainColor =>
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{
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const hsl = color(mainColor).hsl();
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hsl.color = Math.max(0, hsl.color[2] += 10);
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return hsl.hex();
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};
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const sizes = {
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segmentOuter: 8,
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segmentInner: 6,
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stopRadius: 6,
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stopBorder: 1.5,
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courseSize: 15,
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courseOuterBorder: 13,
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courseBorder: 10,
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courseInnerBorder: 7,
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};
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const segmentBorderStyle = feature => new Style({
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stroke: new Stroke({
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color: makeBorderColor(feature.get('colors')[0]),
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width: sizes.segmentOuter,
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}),
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});
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const segmentInnerStyle = feature => new Style({
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stroke: new Stroke({
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color: feature.get('colors')[0],
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width: sizes.segmentInner,
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}),
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});
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const stopStyle = feature => new Style({
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image: new Circle({
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fill: new Fill({
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color: feature.get('colors')[0],
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}),
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stroke: new Stroke({
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color: makeBorderColor(feature.get('colors')[0]),
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width: sizes.stopBorder,
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}),
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radius: sizes.stopRadius,
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}),
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});
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const courseStyles = {};
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const getCourseStyle = color =>
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{
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if (!(color in courseStyles))
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{
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const icon = document.createElement('canvas');
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const shapeSize = sizes.courseSize;
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const iconSize = sizes.courseSize + sizes.courseOuterBorder;
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icon.width = iconSize;
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icon.height = iconSize;
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const cx = icon.width / 2;
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const cy = icon.height / 2;
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const iconCtx = icon.getContext('2d');
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for (let [color, size] of [
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[makeBorderColor(color), sizes.courseOuterBorder],
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[color, sizes.courseBorder],
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[makeCourseColor(color), sizes.courseInnerBorder]
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])
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{
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iconCtx.fillStyle = color;
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iconCtx.strokeStyle = color;
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iconCtx.lineWidth = size;
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iconCtx.lineJoin = 'round';
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iconCtx.miterLimit = 200000;
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iconCtx.beginPath();
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iconCtx.moveTo(cx - 0.5 * shapeSize, cy - 0.3 * shapeSize);
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iconCtx.lineTo(cx + 0.5 * shapeSize, cy);
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iconCtx.lineTo(cx - 0.5 * shapeSize, cy + 0.3 * shapeSize);
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iconCtx.closePath();
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iconCtx.stroke();
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iconCtx.fill();
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}
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courseStyles[color] = new Style({
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image: new Icon({
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img: icon,
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imgSize: [icon.width, icon.height],
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}),
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});
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}
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return courseStyles[color];
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};
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const createMap = target =>
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{
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// Map background
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const backgroundSource = new XYZSource({
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url: 'https://api.mapbox.com/' + [
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'styles', 'v1', 'mapbox', 'streets-v11',
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'tiles', '512', '{z}', '{x}', '{y}',
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].join('/') + `?access_token=${mapboxToken}`,
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tileSize: [512, 512],
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});
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const backgroundLayer = new TileLayer({
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source: backgroundSource,
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});
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// Static data overlay
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const {segmentsSource, stopsSource} = makeDataSources();
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const segmentsBorderLayer = new VectorLayer({
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source: segmentsSource,
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style: segmentBorderStyle,
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updateWhileInteracting: true,
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updateWhileAnimating: true,
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});
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const segmentsInnerLayer = new VectorLayer({
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source: segmentsSource,
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style: segmentInnerStyle,
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updateWhileInteracting: true,
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updateWhileAnimating: true,
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});
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const stopsLayer = new VectorLayer({
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source: stopsSource,
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style: stopStyle,
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minZoom: 13,
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updateWhileInteracting: true,
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updateWhileAnimating: true,
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});
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// Setup map
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const view = new View({
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center: proj.fromLonLat([3.88, 43.605]),
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zoom: 14,
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maxZoom: 22,
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constrainResolution: true,
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});
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const map = new Map({
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target,
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layers: [
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backgroundLayer,
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segmentsBorderLayer,
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segmentsInnerLayer,
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stopsLayer,
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],
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view,
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});
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// Run courses simulation
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const simulInstance = simulation.start();
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// Course on which the view is currently focused
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let focusedCourse = null;
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const focusZoom = 17;
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const startFocus = courseId =>
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{
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if (courseId in simulInstance.courses)
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{
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const course = simulInstance.courses[courseId];
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view.animate({
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center: course.position,
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zoom: focusZoom,
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duration: 500,
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}, () => focusedCourse = courseId);
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}
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};
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const stopFocus = () =>
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{
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focusedCourse = null;
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};
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// Draw courses directly on the map
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map.on('postcompose', ev =>
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{
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simulInstance.update();
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// The normal way to access a layer’s vector context is through the
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// `postrender` event of that layer. However, `postrender` is not
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// triggered when no feature of the layer is inside the current
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// bounding box, but we want to draw vehicles in between stops even
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// if no stop is visible. This hack listens to the global `postcompose`
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// event, which is always triggered at every frame, and reconstructs
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// the stops layer’s vector context from internal variables
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if (stopsLayer.renderer_)
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{
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ev.context = stopsLayer.renderer_.context;
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ev.inversePixelTransform
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= stopsLayer.renderer_.inversePixelTransform;
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const ctx = getVectorContext(ev);
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let rotation = 0;
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for (let course of Object.values(simulInstance.courses))
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{
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const color = network.lines[course.line].color;
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const style = getCourseStyle(color);
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style.getImage().setRotation(course.angle);
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ctx.setStyle(style);
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const point = new Point(course.position);
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ctx.drawGeometry(point);
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if (course.id === focusedCourse)
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{
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view.setCenter(course.position);
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// view.setZoom(focus);
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}
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}
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}
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map.render();
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});
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map.render();
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map.on('singleclick', ev =>
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{
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const mousePixel = map.getPixelFromCoordinate(ev.coordinate);
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const maxDistance = sizes.courseSize + sizes.courseOuterBorder;
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for (let course of Object.values(simulInstance.courses))
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{
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const coursePixel = map.getPixelFromCoordinate(course.position);
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const dx = mousePixel[0] - coursePixel[0];
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const dy = mousePixel[1] - coursePixel[1];
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const distance = dx * dx + dy * dy;
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if (distance <= maxDistance * maxDistance)
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{
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startFocus(course.id);
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return;
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}
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}
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// Clicking anywhere else resets focus
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stopFocus();
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});
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return map;
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};
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exports.createMap = createMap;
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