177 lines
9.6 KiB
JavaScript
177 lines
9.6 KiB
JavaScript
// tides.js — motore armonico delle maree (ES5 puro, compatibile Qt 5.6 QML)
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// Formato porto: [nome, paese, lat, lon, cost, flag]
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// cost = [Z0, [A,phi] per M2,S2,N2,K1,O1,P1,K2] (phi in gradi)
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// flag = "" (porto noto) | "near:<porto>:<gradi>" | "synth"
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var W = {
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M2: 28.9841042, S2: 30.0, N2: 28.4397295,
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K1: 15.0410686, O1: 13.9430356, P1: 14.9589314, K2: 30.0821373
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};
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var WK = ["M2", "S2", "N2", "K1", "O1", "P1", "K2"];
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var PORTS = [
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["Venezia", "Italia", 45.43, 12.34, [0.35, [0.22, 215], [0.10, 245], [0.05, 210], [0.19, 100], [0.12, 85], [0.06, 100], [0.03, 245]]],
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["Chioggia", "Italia", 45.22, 12.28, [0.34, [0.21, 212], [0.10, 242], [0.05, 207], [0.18, 98], [0.11, 83], [0.06, 98], [0.03, 242]]],
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["Trieste", "Italia", 45.65, 13.77, [0.34, [0.20, 220], [0.09, 250], [0.05, 215], [0.22, 105], [0.14, 90], [0.07, 105], [0.03, 250]]],
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["Ancona", "Italia", 43.62, 13.52, [0.25, [0.12, 210], [0.05, 240], [0.03, 205], [0.10, 95], [0.06, 80], [0.03, 95], [0.02, 240]]],
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["Genova", "Italia", 44.41, 8.93, [0.22, [0.08, 200], [0.04, 230], [0.02, 195], [0.10, 95], [0.07, 80], [0.03, 95], [0.01, 230]]],
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["Livorno", "Italia", 43.55, 10.31, [0.24, [0.10, 205], [0.05, 235], [0.03, 200], [0.11, 95], [0.07, 80], [0.03, 95], [0.01, 235]]],
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["Napoli", "Italia", 40.84, 14.27, [0.22, [0.10, 210], [0.05, 240], [0.03, 205], [0.11, 90], [0.07, 75], [0.03, 90], [0.01, 240]]],
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["Palermo", "Italia", 38.12, 13.36, [0.21, [0.09, 205], [0.04, 235], [0.02, 200], [0.10, 90], [0.06, 75], [0.03, 90], [0.01, 235]]],
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["Cagliari", "Italia", 39.21, 9.11, [0.20, [0.07, 200], [0.03, 230], [0.02, 195], [0.09, 88], [0.06, 73], [0.03, 88], [0.01, 230]]],
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["Bari", "Italia", 41.13, 16.87, [0.25, [0.14, 200], [0.06, 230], [0.04, 195], [0.10, 92], [0.06, 77], [0.03, 92], [0.02, 230]]],
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["Londra (London Bridge)", "Regno Unito", 51.51, -0.09, [3.50, [2.10, 150], [0.85, 180], [0.45, 145], [0.12, 200], [0.10, 190], [0.04, 200], [0.23, 180]]],
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["New York (The Battery)", "USA", 40.70, -74.01, [0.80, [0.67, 180], [0.28, 205], [0.14, 175], [0.12, 60], [0.10, 55], [0.04, 60], [0.08, 205]]],
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["San Francisco (Golden Gate)", "USA", 37.81, -122.47, [1.00, [0.58, 135], [0.26, 160], [0.12, 130], [0.37, 290], [0.24, 275], [0.11, 290], [0.07, 160]]],
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["Tokyo (Bay)", "Giappone", 35.68, 139.77, [1.20, [0.45, 170], [0.20, 195], [0.09, 165], [0.18, 240], [0.12, 225], [0.05, 240], [0.05, 195]]],
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["Sydney", "Australia", -33.87, 151.21, [1.00, [0.50, 100], [0.23, 125], [0.10, 95], [0.10, 300], [0.07, 285], [0.03, 300], [0.06, 125]]],
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["Honolulu", "USA", 21.31, -157.86, [0.35, [0.20, 115], [0.09, 140], [0.05, 110], [0.18, 320], [0.12, 305], [0.05, 320], [0.02, 140]]]
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];
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// Citta' con coordinate per ricerca offline (fallback senza rete)
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var CITIES = [
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["Milano", "Italia", 45.46, 9.19], ["Roma", "Italia", 41.90, 12.50], ["Torino", "Italia", 45.07, 7.69],
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["Bologna", "Italia", 44.49, 11.34], ["Firenze", "Italia", 43.77, 11.26], ["Verona", "Italia", 45.44, 10.99],
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["Padova", "Italia", 45.41, 11.88], ["Ravenna", "Italia", 44.42, 12.20], ["Pescara", "Italia", 42.46, 14.21],
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["Reggio Calabria", "Italia", 38.11, 15.65], ["Catania", "Italia", 37.51, 15.09], ["Trapani", "Italia", 38.02, 12.54],
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["Olbia", "Italia", 40.92, 9.50], ["Alghero", "Italia", 40.56, 8.32], ["Imperia", "Italia", 43.89, 8.03],
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["La Spezia", "Italia", 44.10, 9.82], ["Viareggio", "Italia", 43.87, 10.25], ["Civitavecchia", "Italia", 42.09, 11.79],
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["Salerno", "Italia", 40.68, 14.77], ["Taranto", "Italia", 40.46, 17.24], ["Brindisi", "Italia", 40.64, 17.95],
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["Otranto", "Italia", 40.15, 18.49], ["Marsala", "Italia", 37.80, 12.44], ["Porto Torres", "Italia", 40.84, 8.40],
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["Amsterdam", "Paesi Bassi", 52.37, 4.90], ["Rotterdam", "Paesi Bassi", 51.92, 4.48],
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["Barcellona", "Spagna", 41.39, 2.17], ["Marsiglia", "Francia", 43.30, 5.37], ["Atene", "Grecia", 37.98, 23.73],
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["Istanbul", "Turchia", 41.01, 28.98], ["Lisbona", "Portogallo", 38.72, -9.14], ["Dublino", "Irlanda", 53.35, -6.26],
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["Edimburgo", "Regno Unito", 55.95, -3.19], ["Amburgo", "Germania", 53.55, 9.99], ["Copenaghen", "Danimarca", 55.68, 12.57],
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["Oslo", "Norvegia", 59.91, 10.75], ["Stoccolma", "Svezia", 59.33, 18.07], ["Helsinki", "Finlandia", 60.17, 24.94],
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["Miami", "USA", 25.76, -80.19], ["Los Angeles", "USA", 34.05, -118.24], ["Seattle", "USA", 47.61, -122.33],
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["Vancouver", "Canada", 49.28, -123.12], ["Città del Messico", "Messico", 19.43, -99.13],
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["Lima", "Perù", -12.05, -77.04], ["Buenos Aires", "Argentina", -34.60, -58.38],
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["Città del Capo", "Sudafrica", -33.92, 18.42], ["Mumbai", "India", 19.08, 72.88],
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["Singapore", "Singapore", 1.35, 103.82], ["Hong Kong", "Cina", 22.32, 114.17], ["Shanghai", "Cina", 31.23, 121.47],
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["Seoul", "Corea del Sud", 37.57, 126.98], ["Manila", "Filippine", 14.60, 120.98], ["Jakarta", "Indonesia", -6.21, 106.85],
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["Auckland", "Nuova Zelanda", -36.85, 174.76], ["Wellington", "Nuova Zelanda", -41.29, 174.78],
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["Rio de Janeiro", "Brasile", -22.91, -43.17], ["Il Cairo", "Egitto", 30.04, 31.24], ["Dubai", "EAU", 25.20, 55.27],
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["Gibilterra", "Regno Unito", 36.14, -5.35], ["Malta (La Valletta)", "Malta", 35.90, 14.51]
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];
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var EPOCH = Date.UTC(2000, 0, 1) / 3600000; // ore dal 1970 all'epoca armonica
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// Altezza della marea (metri) in un dato istante
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function tide(port, date) {
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var t = date.getTime() / 3600000 - EPOCH;
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var C = port[4];
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var h = C[0];
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for (var i = 0; i < 7; i++) {
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var a = C[i + 1][0], p = C[i + 1][1];
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h += a * Math.cos((W[WK[i]] * t + p) * Math.PI / 180);
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}
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return h;
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}
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// Estremi (alta/bassa) da adesso nei prossimi giorni
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function extrema(port, now, days) {
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var step = 2 * 60 * 1000;
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var out = [];
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var end = now.getTime() + days * 86400000;
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var prev = tide(port, new Date(now.getTime() - step));
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var cur = tide(port, now);
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var rising = cur > prev;
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for (var t = now.getTime() + step; t <= end; t += step) {
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var nx = tide(port, new Date(t));
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if (rising && nx < cur) {
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var bt = t - step, hh = cur;
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for (var dt = bt - 10 * 60000; dt <= t + 10 * 60000; dt += 30000) {
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var hh2 = tide(port, new Date(dt));
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if (hh2 > hh) { hh = hh2; bt = dt; }
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}
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out.push({ t: bt, h: hh, kind: "high" });
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} else if (!rising && nx > cur) {
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var bt2 = t - step, hh3 = cur;
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for (var dt2 = bt2 - 10 * 60000; dt2 <= t + 10 * 60000; dt2 += 30000) {
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var hh4 = tide(port, new Date(dt2));
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if (hh4 < hh3) { hh3 = hh4; bt2 = dt2; }
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}
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out.push({ t: bt2, h: hh3, kind: "low" });
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}
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prev = cur; cur = nx; rising = nx > prev;
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}
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return out;
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}
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// Distanza approssimata in km tra un porto e un punto
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function portDist(p, lat, lon) {
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var dlat = (p[2] - lat) * 111;
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var dlon = (p[3] - lon) * 111 * Math.cos(lat * Math.PI / 180);
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return Math.sqrt(dlat * dlat + dlon * dlon);
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}
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// Porto noto piu' vicino a lat/lon
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function nearestPort(lat, lon) {
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var best = null, bd = 1e9;
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for (var i = 0; i < PORTS.length; i++) {
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var d = portDist(PORTS[i], lat, lon);
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if (d < bd) { bd = d; best = PORTS[i]; }
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}
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return { port: best, km: bd };
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}
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// Costanti stimate da lat/lon (modello sintetico, per il mockup)
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function synthConst(lat, lon) {
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var a = Math.abs(lat);
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var g = Math.exp(-0.5 * Math.pow((a - 48) / 18, 2));
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var M2 = 0.08 + 1.6 * g;
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var S2 = 0.38 * M2, N2 = 0.19 * M2, K2 = 0.27 * S2;
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var dg = Math.exp(-0.5 * Math.pow(a / 25, 2));
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var K1 = 0.10 + 0.22 * dg, O1 = 0.70 * K1, P1 = 0.33 * K1;
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var pM = ((lon * 2.8 + 100) % 360 + 360) % 360;
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return [0.3, [M2, pM], [S2, (pM + 30) % 360], [N2, (pM - 25 + 360) % 360], [K1, 80], [O1, 65], [P1, 80], [K2, (pM + 30) % 360]];
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}
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// Citta' nel dataset locale (ricerca offline)
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function findCityLocal(q) {
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q = q.toLowerCase();
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for (var i = 0; i < CITIES.length; i++) {
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if (CITIES[i][0].toLowerCase().indexOf(q) !== -1) return CITIES[i];
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}
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return null;
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}
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// Fase lunare: {icon, idx (0-7), age (giorni)}
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function moonPhase(date) {
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var syn = 29.53058867;
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var known = Date.UTC(2000, 0, 6, 18, 14) / 86400000;
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var age = ((date.getTime() / 86400000 - known) % syn + syn) % syn;
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var icons = ["\uD83C\uDF11", "\uD83C\uDF12", "\uD83C\uDF13", "\uD83C\uDF14", "\uD83C\uDF15", "\uD83C\uDF16", "\uD83C\uDF17", "\uD83C\uDF18"];
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return { icon: icons[Math.round(age / syn * 8) % 8], idx: Math.round(age / syn * 8) % 8, age: age };
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}
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// Alba/tramonto approssimati (ora solare, ore decimali)
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function sunTimes(lat, date) {
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var N = Math.floor((date.getTime() - Date.UTC(date.getFullYear(), 0, 1)) / 86400000);
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var dec = 23.45 * Math.sin((360 / 365) * (284 + N) * Math.PI / 180);
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var latR = lat * Math.PI / 180, decR = dec * Math.PI / 180;
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var cosH = (-Math.sin(latR) * Math.sin(decR)) / (Math.cos(latR) * Math.cos(decR));
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cosH = Math.max(-1, Math.min(1, cosH));
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var H = Math.acos(cosH) * 180 / Math.PI / 15;
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return { rise: 12 - H, set: 12 + H };
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}
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// Formato altezza secondo l'unita' scelta
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function fmtH(h, unit) {
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return unit === "ft" ? (h * 3.28084).toFixed(1) + " ft" : h.toFixed(2) + " m";
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}
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// Formato ora HH:MM
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function fmtHM(t) {
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var d = new Date(t);
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var hh = d.getHours(), mm = d.getMinutes();
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return (hh < 10 ? "0" : "") + hh + ":" + (mm < 10 ? "0" : "") + mm;
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}
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// Formato data breve
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function fmtDate(t) {
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var d = new Date(t);
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var giorni = ["Dom", "Lun", "Mar", "Mer", "Gio", "Ven", "Sab"];
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return giorni[d.getDay()] + " " + (d.getDate() < 10 ? "0" : "") + d.getDate() + "/" + ((d.getMonth() + 1) < 10 ? "0" : "") + (d.getMonth() + 1);
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}
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