src/front/index.js

@@ -1,4 +1,7 @@
 require('regenerator-runtime/runtime');
 
 const {createMap} = require('./map');
+
+require('../tam/simulation');
+
 createMap(/* map = */ 'map');

src/front/map.js

@@ -21,7 +21,6 @@ const color = require('color');
 const mapboxToken = `pk.eyJ1IjoibWF0dGVvZGVsYWJyZSIsImEiOiJja2NxaTUyMmUwcmFhMn\
 h0NmFsdzQ3emxqIn0.cyxF0h36emIMTk3cc4VqUw`;
 
-const simulation = require('../tam/simulation');
 const network = require('../tam/network.json');
 
 const getRouteColors = routes =>
@@ -40,7 +39,7 @@ const getRouteColors = routes =>
     return ['#FFFFFF'];
 };
 
-const makeDataSources = () =>
+const makeDataSources = async () =>
 {
     const segmentsSource = new VectorSource();
     const stopsSource = new VectorSource();
@@ -102,7 +101,7 @@ const stopsStyle = feature => new Style({
     }),
 });
 
-const createMap = target =>
+const createMap = async (target) =>
 {
     // Map background
     const backgroundSource = new XYZSource({
@@ -117,8 +116,8 @@ const createMap = target =>
         source: backgroundSource,
     });
 
-    // Static data overlay
+    // Data overlay
-    const {segmentsSource, stopsSource} = makeDataSources();
+    const {segmentsSource, stopsSource} = await makeDataSources();
 
     const segmentsBorderLayer = new VectorLayer({
         source: segmentsSource,
@@ -145,63 +144,6 @@ const createMap = target =>
         updateWhileAnimating: true,
     });
 
-    // Dynamic data overlay
-    const coursesSource = new VectorSource();
-
-    const onFrame = courses =>
-    {
-        // Remove stale courses
-        for (let feature of coursesSource.getFeatures())
-        {
-            if (!(feature.getId() in courses))
-            {
-                coursesSource.removeFeature(feature);
-            }
-        }
-
-        // Add new courses or update existing courses
-        const newFeatures = [];
-
-        for (let [courseId, course] of Object.entries(courses))
-        {
-            if ('position' in course)
-            {
-                const feature = coursesSource.getFeatureById(courseId);
-                const coords = proj.fromLonLat([
-                    course.position.lon,
-                    course.position.lat
-                ]);
-
-                if (feature === null)
-                {
-                    const feature = new Feature({
-                        colors: ['#FF0000'],
-                        geometry: new Point(coords)
-                    });
-
-                    feature.setId(courseId);
-                    newFeatures.push(feature);
-                }
-                else
-                {
-                    feature.getGeometry().setCoordinates(coords);
-                }
-            }
-        }
-
-        coursesSource.addFeatures(newFeatures);
-    };
-
-    simulation.run(onFrame);
-
-    const coursesLayer = new VectorLayer({
-        source: coursesSource,
-        style: stopsStyle,
-
-        updateWhileInteracting: true,
-        updateWhileAnimating: true,
-    });
-
     // Setup map
     const map = new Map({
         target,
@@ -210,7 +152,6 @@ const createMap = target =>
             segmentsBorderLayer,
             segmentsInnerLayer,
             stopsLayer,
-            coursesLayer,
         ],
         view: new View({
             center: proj.fromLonLat([3.88, 43.605]),

src/tam/realtime.js

@@ -1,6 +1,5 @@
 const tam = require('./sources/tam');
 const util = require('../util');
-const network = require('./network.json');
 
 /**
  * Comparison function between two stop passings.
@@ -58,28 +57,6 @@ const getCourses = () => new Promise((res, rej) =>
 
         if (!util.isObject(entry))
         {
-            // Filter courses to only keep those referring to known data
-            for (let courseId of Object.keys(courses))
-            {
-                const course = courses[courseId];
-
-                if (!(course.line in network.lines))
-                {
-                    delete courses[courseId];
-                }
-                else
-                {
-                    for (let passing of course.nextPassings)
-                    {
-                        if (!(passing.stopId in network.stops))
-                        {
-                            delete courses[courseId];
-                            break;
-                        }
-                    }
-                }
-            }
-
             // End of courses information stream. Sort next stops by increasing
             // arrival time in each course then save result in memory cache
             for (let course of Object.values(courses))

src/tam/simulation.js

@@ -71,6 +71,12 @@ const updateFromTam = async (courses) =>
 
     for (let [id, course] of Object.entries(currentCourses))
     {
+        // Only track selected lines
+        if (!['1', '2', '3', '4'].includes(course.line))
+        {
+            continue;
+        }
+
         // Find out the next stop, ignoring the ones that are in the past
         let nextStop = null;
         let arrivalTime = null;
@@ -149,7 +155,6 @@ const updatePositions = (courses, time) =>
     {
         if (course.state === 'moving')
         {
-            // Increase the travelled distance respective to the current speed
             const delta = course.speed * time;
 
             const segment = getCurrentSegment(course);
@@ -163,66 +168,20 @@ const updatePositions = (courses, time) =>
             {
                 course.traveledDistance += delta;
             }
-
-            // Recompute updated position
-            const departureStop = network.stops[course.departureStop];
-            const arrivalStop = network.stops[course.arrivalStop];
-            const nextNodeIndex = segment.points.findIndex(
-                ({distance}) => distance >= course.traveledDistance);
-
-            if (nextNodeIndex === 0)
-            {
-                course.position = {
-                    lat: departureStop.lat,
-                    lon: departureStop.lon
-                };
-            }
-            else if (nextNodeIndex === -1)
-            {
-                course.position = {
-                    lat: arrivalStop.lat,
-                    lon: arrivalStop.lon
-                };
-            }
-            else
-            {
-                const previousNode = segment.points[nextNodeIndex - 1];
-                const nextNode = segment.points[nextNodeIndex];
-
-                const curLength = course.traveledDistance
-                    - previousNode.distance;
-                const totalLength = nextNode.distance
-                    - previousNode.distance;
-                const progression = curLength / totalLength;
-
-                course.position = {
-                    lat: progression * nextNode.lat
-                        + (1 - progression) * previousNode.lat,
-                    lon: progression * nextNode.lon
-                        + (1 - progression) * previousNode.lon,
-                };
-            }
-        }
-        else
-        {
-            const currentStop = network.stops[course.currentStop];
-            course.position = {
-                lat: currentStop.lat,
-                lon: currentStop.lon,
-            };
         }
     }
 };
 
-const run = callback =>
+const courses = {};
-{
+let lastFrame = null;
-    const courses = {};
+let lastUpdate = null;
-    let lastFrame = null;
-    let lastUpdate = null;
 
-    const loop = () =>
+const loop = now =>
-    {
+{
-        const now = Date.now();
+    const time = lastFrame === null ? 0 : now - lastFrame;
+
+    lastFrame = now;
+    updatePositions(courses, time);
 
     if (lastUpdate === null || lastUpdate + 5000 <= now)
     {
@@ -230,15 +189,7 @@ const run = callback =>
         updateFromTam(courses);
     }
 
-        const time = lastFrame === null ? 0 : now - lastFrame;
+    requestAnimationFrame(loop);
-        lastFrame = now;
-        updatePositions(courses, time);
-
-        callback(courses);
-    };
-
-    const interval = setInterval(loop, 24);
-    return () => clearInterval(interval);
 };
 
-exports.run = run;
+requestAnimationFrame(loop);