m038
b6c9d0b2ac
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr
344 lines
13 KiB
JavaScript
344 lines
13 KiB
JavaScript
/* Shared MapLibre GL utilities — loaded by map.html.twig, dailies.html.twig, home.html.twig */
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(function (global) {
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var ACCENT = '#2A8C73';
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var ACCENT_DIM = '#155244';
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var MAP_STYLE = 'https://basemaps.cartocdn.com/gl/dark-matter-gl-style/style.json';
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/* Build a GeoJSON LineString feature */
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function lineFeature(coords) {
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return { type: 'Feature', properties: {}, geometry: { type: 'LineString', coordinates: coords } };
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}
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/*
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* Centripetal Catmull-Rom spline (α=0.5) through waypoints → dense coords.
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* Parameterising by √chord-length prevents the large bow that uniform
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* parameterisation produces when consecutive points are very close together
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* but their neighbours are far away (e.g. two entries both in Berlin).
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*/
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function catmullRomSpline(coords, steps) {
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if (coords.length < 2) return coords;
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steps = steps || 16;
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var alpha = 0.5;
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var out = [];
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/* Phantom endpoints via reflection so the spline reaches the first and last real points */
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var ext = [
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[2*coords[0][0] - coords[1][0], 2*coords[0][1] - coords[1][1]]
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].concat(coords).concat([
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[2*coords[coords.length-1][0] - coords[coords.length-2][0],
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2*coords[coords.length-1][1] - coords[coords.length-2][1]]
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]);
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function segT(a, b) {
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var dx = b[0]-a[0], dy = b[1]-a[1];
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return Math.pow(Math.max(Math.sqrt(dx*dx + dy*dy), 1e-10), alpha);
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}
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for (var i = 1; i < ext.length - 2; i++) {
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var p0 = ext[i-1], p1 = ext[i], p2 = ext[i+1], p3 = ext[i+2];
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var t0 = 0;
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var t1 = t0 + segT(p0, p1);
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var t2 = t1 + segT(p1, p2);
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var t3 = t2 + segT(p2, p3);
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for (var s = 0; s < steps; s++) {
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var t = t1 + (t2 - t1) * s / steps;
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var a1x = (t1-t)/(t1-t0)*p0[0] + (t-t0)/(t1-t0)*p1[0];
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var a1y = (t1-t)/(t1-t0)*p0[1] + (t-t0)/(t1-t0)*p1[1];
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var a2x = (t2-t)/(t2-t1)*p1[0] + (t-t1)/(t2-t1)*p2[0];
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var a2y = (t2-t)/(t2-t1)*p1[1] + (t-t1)/(t2-t1)*p2[1];
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var a3x = (t3-t)/(t3-t2)*p2[0] + (t-t2)/(t3-t2)*p3[0];
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var a3y = (t3-t)/(t3-t2)*p2[1] + (t-t2)/(t3-t2)*p3[1];
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var b1x = (t2-t)/(t2-t0)*a1x + (t-t0)/(t2-t0)*a2x;
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var b1y = (t2-t)/(t2-t0)*a1y + (t-t0)/(t2-t0)*a2y;
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var b2x = (t3-t)/(t3-t1)*a2x + (t-t1)/(t3-t1)*a3x;
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var b2y = (t3-t)/(t3-t1)*a2y + (t-t1)/(t3-t1)*a3y;
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out.push([
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(t2-t)/(t2-t1)*b1x + (t-t1)/(t2-t1)*b2x,
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(t2-t)/(t2-t1)*b1y + (t-t1)/(t2-t1)*b2y
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]);
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}
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}
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out.push(coords[coords.length - 1]);
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return out;
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}
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/*
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* Progressively draw the journey line using a requestAnimationFrame loop.
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* splineCoords: dense interpolated coords from catmullRomSpline().
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*/
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function animateJourneyLine(map, splineCoords, sourceId) {
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if (splineCoords.length < 2) return;
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var segDist = [0];
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for (var i = 1; i < splineCoords.length; i++) {
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var dx = splineCoords[i][0] - splineCoords[i - 1][0];
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var dy = splineCoords[i][1] - splineCoords[i - 1][1];
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segDist.push(segDist[i - 1] + Math.sqrt(dx * dx + dy * dy));
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}
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var totalDist = segDist[segDist.length - 1];
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var DURATION = 5000;
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var startTime = performance.now();
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function frame(now) {
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if (!map.getSource(sourceId)) return;
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var t = Math.min((now - startTime) / DURATION, 1);
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var eased = 1 - Math.pow(1 - t, 3);
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var target = eased * totalDist;
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var animCoords = [splineCoords[0]];
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for (var j = 1; j < splineCoords.length; j++) {
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if (segDist[j] <= target) {
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animCoords.push(splineCoords[j]);
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} else {
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var frac = (target - segDist[j - 1]) / (segDist[j] - segDist[j - 1]);
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animCoords.push([
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splineCoords[j - 1][0] + (splineCoords[j][0] - splineCoords[j - 1][0]) * frac,
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splineCoords[j - 1][1] + (splineCoords[j][1] - splineCoords[j - 1][1]) * frac
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]);
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break;
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}
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}
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map.getSource(sourceId).setData(lineFeature(animCoords));
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if (t < 1) requestAnimationFrame(frame);
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}
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requestAnimationFrame(frame);
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}
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/*
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* Add a journey line to a loaded map — dotted, subordinate style so GPX
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* tracks read as the primary route where they exist.
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* coords: [[lng, lat], ...] raw waypoints (daily entry positions).
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*/
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function addJourneyLine(map, coords, sourceId) {
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if (coords.length < 2) return;
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var splineCoords = catmullRomSpline(coords, 16);
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map.addSource(sourceId, { type: 'geojson', data: lineFeature([splineCoords[0]]) });
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map.addLayer({
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id: sourceId + '-line', type: 'line', source: sourceId,
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layout: { 'line-join': 'round', 'line-cap': 'round' },
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paint: {
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'line-color': ACCENT,
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'line-width': 2,
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'line-opacity': 0.45,
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'line-dasharray': [0, 2.5]
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}
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});
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var reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
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if (reducedMotion) {
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map.getSource(sourceId).setData(lineFeature(splineCoords));
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} else {
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animateJourneyLine(map, splineCoords, sourceId);
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}
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}
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/*
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* Return a styled <div> element for a map marker dot.
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* isLatest: make it larger with a teal ring.
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*/
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function createDotMarker(isLatest) {
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var el = document.createElement('div');
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var size = isLatest ? 18 : 12;
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var bg = isLatest ? ACCENT_DIM : ACCENT;
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var ring = isLatest ? ',0 0 0 4px rgba(42,140,115,0.25)' : '';
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el.style.cssText = [
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'width:' + size + 'px',
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'height:' + size + 'px',
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'background:' + bg,
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'border:2px solid #fff',
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'border-radius:50%',
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'box-shadow:0 1px 4px rgba(0,0,0,0.4)' + ring,
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'cursor:pointer'
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].join(';');
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return el;
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}
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/*
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* Return a styled <div> element for a story marker (white diamond, teal border).
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*/
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function createStoryMarker() {
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var el = document.createElement('div');
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el.style.cssText = [
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'width:10px',
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'height:10px',
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'background:#fff',
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'border:2px solid ' + ACCENT,
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'transform:rotate(45deg)',
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'box-shadow:0 1px 4px rgba(0,0,0,0.4)',
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'cursor:pointer'
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].join(';');
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return el;
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}
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/* Haversine distance in km between two [lat, lng] points */
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function haversineKm(lat1, lng1, lat2, lng2) {
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var R = 6371;
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var dLat = (lat2 - lat1) * Math.PI / 180;
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var dLng = (lng2 - lng1) * Math.PI / 180;
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var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
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Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
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Math.sin(dLng / 2) * Math.sin(dLng / 2);
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return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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}
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/* Extract [[lat, lng], ...] from a toGeoJSON output (flips GeoJSON [lng,lat] order). */
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function extractTrackpoints(geojson) {
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var points = [];
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(geojson.features || []).forEach(function (feat) {
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var coords = [];
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if (feat.geometry.type === 'LineString') {
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coords = feat.geometry.coordinates;
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} else if (feat.geometry.type === 'MultiLineString') {
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feat.geometry.coordinates.forEach(function (line) { coords = coords.concat(line); });
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}
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coords.forEach(function (c) { points.push([c[1], c[0]]); });
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});
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return points;
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}
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/* True if [markerLat, markerLng] is within thresholdKm of any point in trackpoints [[lat,lng],...]. */
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function isNearTrack(markerLat, markerLng, trackpoints, thresholdKm) {
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if (!trackpoints || trackpoints.length === 0) return false;
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var degLat = thresholdKm / 111;
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var degLng = thresholdKm / (111 * Math.cos(markerLat * Math.PI / 180));
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for (var i = 0; i < trackpoints.length; i += 10) {
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var pt = trackpoints[i];
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if (Math.abs(pt[0] - markerLat) > degLat || Math.abs(pt[1] - markerLng) > degLng) continue;
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if (haversineKm(markerLat, markerLng, pt[0], pt[1]) <= thresholdKm) return true;
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}
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var last = trackpoints[trackpoints.length - 1];
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return haversineKm(markerLat, markerLng, last[0], last[1]) <= thresholdKm;
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}
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/*
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* Build journey line segments from entries.
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*
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* entries: [{lat, lng, force_connect?}, ...] in chronological order
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* opts.connectMode: 'on' | 'off' | 'manual' | 'intelligent_gpx' (default: 'on')
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* 'on' → connect every consecutive pair (force_connect irrelevant)
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* 'off' → no connectors, force_connect is also ignored
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* 'manual' → only entries with force_connect:true draw a connector
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* 'intelligent_gpx'→ suppress connector where GPX covers both endpoints;
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* force_connect always overrides
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* trackpointsPerFile: [ [[lat,lng],...], ... ] — required only for intelligent_gpx
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*
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* Returns array of segments [[lng, lat], ...] in MapLibre coordinate order.
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* Segments with < 2 points are omitted.
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*/
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function buildJourneySegments(entries, opts, trackpointsPerFile) {
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var mode = (opts && opts.connectMode) || 'on';
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var segments = [];
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var current = [];
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for (var i = 0; i < entries.length; i++) {
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var e = entries[i];
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var lngLat = [parseFloat(e.lng), parseFloat(e.lat)];
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if (i === 0) { current.push(lngLat); continue; }
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var connect;
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if (mode === 'off') {
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connect = false;
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} else if (mode === 'on') {
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connect = true;
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} else if (mode === 'manual') {
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connect = !!e.force_connect;
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} else { /* intelligent_gpx */
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if (e.force_connect) {
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connect = true;
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} else if (!trackpointsPerFile || trackpointsPerFile.length === 0) {
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connect = true; /* no GPX present → connect all */
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} else {
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var prev = entries[i - 1];
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var covered = false;
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for (var f = 0; f < trackpointsPerFile.length; f++) {
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if (isNearTrack(parseFloat(prev.lat), parseFloat(prev.lng), trackpointsPerFile[f], 10) &&
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isNearTrack(parseFloat(e.lat), parseFloat(e.lng), trackpointsPerFile[f], 10)) {
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covered = true; break;
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}
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}
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connect = !covered;
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}
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}
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if (connect) {
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current.push(lngLat);
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} else {
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if (current.length >= 2) segments.push(current);
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current = [lngLat];
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}
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}
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if (current.length >= 2) segments.push(current);
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return segments;
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}
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/*
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* Draw journey segments — calls addJourneyLine once per segment.
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* baseSourceId: e.g. 'journey' → sources become 'journey-0', 'journey-1', ...
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* (single segment gets plain 'journey' for backwards compatibility).
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*/
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function addJourneySegments(map, segments, baseSourceId) {
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segments.forEach(function (coords, i) {
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var sid = segments.length === 1 ? baseSourceId : baseSourceId + '-' + i;
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addJourneyLine(map, coords, sid);
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});
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}
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/*
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* Fetch GPX files and render their raw tracks, then draw journey connector
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* lines between entries per opts.connectMode / force_connect.
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*
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* gpxUrls: array of GPX file URLs to fetch (empty → no tracks, connectors only)
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* entries: [{lat, lng, force_connect?}, ...] in chronological order
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* gpxSourcePrefix: source/layer ID prefix for raw GPX tracks (e.g. 'gpx', 'home-gpx')
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* journeySourceId: base source ID for connector segments (e.g. 'journey', 'home-journey')
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* opts: forwarded to buildJourneySegments (opts.connectMode)
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*/
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function renderGpxJourney(map, gpxUrls, entries, gpxSourcePrefix, journeySourceId, opts) {
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var needsTrackpoints = opts && opts.connectMode === 'intelligent_gpx';
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Promise.all(gpxUrls.map(function (url, idx) {
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return fetch(url)
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.then(function (r) { return r.text(); })
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.then(function (text) {
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var xml = new DOMParser().parseFromString(text, 'text/xml');
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var geojson = toGeoJSON.gpx(xml);
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var sid = gpxSourcePrefix + '-' + idx;
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map.addSource(sid, { type: 'geojson', data: geojson });
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map.addLayer({
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id: sid + '-line', type: 'line', source: sid,
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layout: { 'line-join': 'round', 'line-cap': 'round' },
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paint: { 'line-color': ACCENT, 'line-width': 2, 'line-opacity': 0.7 }
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});
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return needsTrackpoints ? extractTrackpoints(geojson) : [];
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})
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.catch(function (err) { console.warn('GPX load failed:', url, err); return []; });
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})).then(function (allTrackpoints) {
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var valid = needsTrackpoints ? allTrackpoints.filter(function (tp) { return tp.length > 0; }) : [];
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var segments = buildJourneySegments(entries, opts, valid);
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addJourneySegments(map, segments, journeySourceId);
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});
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}
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global.MapUtils = {
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MAP_STYLE: MAP_STYLE,
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ACCENT: ACCENT,
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addJourneyLine: addJourneyLine,
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addJourneySegments: addJourneySegments,
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buildJourneySegments: buildJourneySegments,
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renderGpxJourney: renderGpxJourney,
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createDotMarker: createDotMarker,
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createStoryMarker: createStoryMarker
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};
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})(window);
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