adrien
b2ab4d76eb
- The bombardment overlay was rebuilt every animation frame, and each barrage scanned the whole army to find its target (O(strikes x units)). It now redraws at most at the renderer's 24 fps, reuses its SVG/DOM nodes, and resolves garrisons from one per-snapshot tile index, so a high-refresh display no longer makes a big battle worse. - Route truncation had the same shape: every step of every route rescanned every unit. The snapshot now buckets the army by tile once. - Idle units no longer have identical left/top rewritten every frame, and the whole-map fog buffer is rebuilt less often. - Snapshot traffic: cityStats and visible are delta-encoded like territory and population, city stats carry a content-hash version, tile ethnicity is memoised, and a city's economy is derived once per broadcast instead of twice. A per-peer civ change now forces a full snapshot, since the visible set is per-viewer.
655 lines
24 KiB
JavaScript
655 lines
24 KiB
JavaScript
// Serialisation: turning the live model into the snapshots the server ships to
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// each viewer, with fog-of-war applied per civilisation.
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import { parseKey } from "../hex.js";
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import { OPINION } from "../data/politics.js";
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import { EFFECT_RAIL_SPEED, EFFECT_CONSTRUCTION_SPEED, EFFECT_RESEARCH } from "../data/effects.js";
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import { serializeSet } from "./helpers.js";
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export const serializationMethods = {
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snapshot(viewerCiv = -1) {
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return this.viewerSnapshot(this.serializeShared(), viewerCiv);
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},
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serializeShared() {
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// Built once and shared by every viewer. Its content hash doubles as the
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// version that lets the server omit it from a delta when nothing moved, so
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// a city panel is not re-sent on every 10 Hz broadcast.
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const cityStats = this._serializeCityStats();
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return {
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seed: this.seed,
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// The world-generation config the seed was generated with. The browser
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// rebuilds the same terrain from it, so a game on a non-default map size
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// or shape is rendered correctly instead of falling back to the default.
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mapConfig: this.mapConfig,
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// A local test game where the client offers free, instant orders.
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testing: !!this.testing,
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totalHours: this.totalHours,
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civs: this.civilisations.map((c) => ({ id: c.id, name: c.name })),
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protos: this.protoUnits.map((p) => ({ id: p.id, name: p.name })),
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buildings: this.protoBuildings.map((b) => ({ id: b.id, name: b.name })),
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governments: this.governments.map((g) => ({ id: g.id, name: g.name })),
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technologies: this.technologies.map((t) => ({ id: t.id, name: t.name })),
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cities: this._serializeCities(),
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units: this._serializeUnits(),
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territory: this._serializedTerritory,
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// The pre-generated road tiles, as [x, y], and the player-built railway
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// tiles, so the browser can draw the transport network. Roads change when
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// a player builds or replaces one, so both are memoised against the
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// improvement version.
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roads: this._serializeTransport(this.roads, "_serializedRoadsCache"),
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railways: this._serializeTransport(this.railways, "_serializedRailwaysCache"),
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// War-time tile works: trenches as [x, y], military improvements as
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// [x, y, id, owner, hp].
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trenches: this._serializeTrenches(),
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tileImprovements: this._serializeTileImprovements(),
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// Each land tile's region: [x, y, cityId], so the browser attributes a
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// tile's GDP modifiers to the city that develops it.
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regions: this._serializeRegions(),
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population: this._serializePopulation(),
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// Sparse per-tile marks of war, so the browser can explain a tile's
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// GDP per capita without shipping the whole breakdown for every tile.
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tileGdpPenalties: this._serializeTileValues(this.tileGdpPenalty),
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tileBattleGdpDeficits: this._serializeTileValues(this.tileBattleGdpDeficit),
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civStats: this._serializeCivStats(),
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cityStats: cityStats,
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budgets: this._serializeCivValues(this.budgets),
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culture: this._serializeCivValues(this.culture),
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// Each nation's share of the world's cultural output (zero-sum) and the
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// people's approval of every government.
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cultureImpact: this._serializeCultureImpact(),
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approval: this._serializeApproval(),
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// The ethnic makeup of every populated tile and the policies and
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// propaganda campaigns in play.
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tileEthnicity: this._serializeTileEthnicity(),
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policies: this._serializePolicies(),
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campaigns: this._serializeCampaigns(),
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// The people who moved in and out of each country during the last day.
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migrations: this._serializeMigrations(),
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// Every population's opinion of every other population and government,
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// so the client can show and target the propaganda.
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opinions: {
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ethnic: this._serializeOpinionMatrix(this.ethnicOpinions),
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government: this._serializeGovOpinionMatrix(),
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},
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government: this._serializeCivValues(this.government),
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researched: this._serializeResearched(),
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// Focused research: the technology each nation is working on, the points
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// committed to every technology it has started, and how many levels of
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// each repeatable it has.
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focusTechnology: this._serializeCivValues(this.focusTechnology),
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techProgress: this._serializeTechProgress(),
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repeatCounts: this._serializeRepeatCounts(),
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diplomacy: this._serializeDiplomacy(),
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conflicts: this._serializeConflicts(),
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news: this._serializeNews(),
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battles: this._serializeBattles(),
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// Each nation's indicators a month ago, for the summary change arrows;
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// empty during January 2000, which has no past month.
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monthly: this.monthlyStats || [],
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training: Object.fromEntries(
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Array.from(this.training.entries()).map(([cityId, queue]) => [
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cityId,
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queue.map((entry) => ({ ...entry })),
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])
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),
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// The military improvements each nation has under construction, so the
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// tile panel can show a progress bar like a city's production.
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tileWorks: this._serializeTileWorks(),
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// Which of the large per-tile collections changed since the last
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// broadcast, so a viewer can rebuild only those and the server can omit
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// the rest from the wire (see GameServer._broadcastState).
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versions: {
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territory: this._territoryVersion,
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regions: this._regionVersion,
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population: this._populationVersion,
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ethnicity: this._ethnicityVersion,
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improvements: this._improvementVersion,
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warfare: this._tileImprovementVersion,
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cityStats: hashCityStats(cityStats),
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visible: this._visibleVersion,
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},
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};
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},
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viewerSnapshot(shared, viewerCiv, stats = null) {
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const result = { ...shared };
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result.viewer = viewerCiv;
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result.viewerStats = stats || this.viewerStats(viewerCiv);
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result.explored = this._cachedExplored(viewerCiv);
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result.visible = serializeSet(this.visible.get(viewerCiv) || new Set());
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return result;
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},
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viewerStats(viewerCiv) {
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if (viewerCiv < 0) {
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return {
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population: 0, gdp: 0, gdpPerCapita: 0, budget: 0,
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upkeep: 0, researchRate: 0, culture: 0, government: 0,
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approval: 0.5, popularity: 0, cultureImpact: 0, ethnicMakeup: [],
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constructionSpeed: 0, railSpeed: 0,
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breakdown: null,
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};
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}
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const headline = this._civHeadline(viewerCiv);
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const modifiers = this.getCivModifiers(viewerCiv);
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return {
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...headline,
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// Repeatable research the browser mirrors: construction and rail speed.
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constructionSpeed: modifiers[EFFECT_CONSTRUCTION_SPEED] || 0,
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railSpeed: modifiers[EFFECT_RAIL_SPEED] || 0,
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budget: this.getBudget(viewerCiv),
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upkeep: this.getPlayerUpkeep(viewerCiv),
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// The research this nation creates each hour, all of which flows into the
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// focused technology. There is no stock of points.
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researchRate: modifiers[EFFECT_RESEARCH] || 0,
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culture: this.getCulture(viewerCiv),
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government: this.getGovernment(viewerCiv),
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approval: this.getCivApproval(viewerCiv),
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popularity: this.getCivPopularity(viewerCiv),
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cultureImpact: this.getCulturalImpact(viewerCiv),
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ethnicMakeup: this.getCivEthnicMakeup(viewerCiv),
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breakdown: this.budgetBreakdown(viewerCiv),
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};
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},
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_serializeCities() {
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return this.cities.map((city) => ({
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id: city.id,
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civ: city.civ,
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coords: [city.coords.x, city.coords.y],
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name: city.name,
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isCapital: city.isCapital,
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// Whether a port may be raised here, so the browser can grey out the
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// order without regenerating the map.
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coastal: this.isCoastalCity(city),
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population: city.population,
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improvements: city.improvements,
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buildings: { ...city.buildings },
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statuses: city.statuses || [],
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}));
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},
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_serializeUnits() {
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const battle = this._battleUnitIds();
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return this.units.map((unit) => {
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const rawPath = unit.path || [];
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const pathIndex = unit.pathIndex;
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const path = rawPath.map((coords) => [coords.x, coords.y]);
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const segmentHours = [];
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for (let i = 1; i < rawPath.length; i++) {
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segmentHours.push(this._tileTravelHours(unit, rawPath[i]));
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}
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let stepHours = 0;
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if (pathIndex + 1 < rawPath.length) {
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stepHours = this._tileTravelHours(unit, rawPath[pathIndex + 1]);
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}
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return {
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id: unit.id,
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civ: unit.civ,
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proto: unit.proto,
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coords: [unit.coords.x, unit.coords.y],
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hp: unit.hp,
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maxHp: unit.maxHp,
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statuses: this._effectiveStatuses(unit, battle.has(unit.id)),
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// Aircraft carry their endurance so the client can show the fuel left.
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airHours: unit.airHours,
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airborne: !!unit.airborne,
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homeCityId: unit.homeCityId,
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// A standing bombardment target (ground battery) or bomb-run target
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// (aircraft), as [x, y], and the hour an aircraft may strike again.
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strikeTarget: unit.strikeTarget
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? [unit.strikeTarget.x, unit.strikeTarget.y]
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: null,
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strikeReadyHour: unit.strikeReadyHour || 0,
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path,
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pathIndex,
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progressHours: unit.progressHours,
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stepHours,
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segmentHours,
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waypoints: (unit.waypoints || []).map((coords) => [coords.x, coords.y]),
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// A transport's cargo and any boarding still under way.
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cargo: (unit.cargo || []).map((passenger) => ({ ...passenger })),
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embarking: unit.embarking
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? { hoursLeft: unit.embarking.hoursLeft, count: unit.embarking.ids.length }
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: null,
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};
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});
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},
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// A sparse [x, y] list of every tile in `tiles`. The list is memoised against
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// the improvement version: the pre-generated road network is laid once, and
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// player-built roads and railways change it in step, so an unchanged network
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// is not re-walked on every broadcast.
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_serializeTransport(tiles, cacheField) {
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const cached = this[cacheField];
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if (cached && cached.version === this._improvementVersion) return cached.value;
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const result = [];
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for (const k of tiles) {
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const coords = parseKey(k);
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result.push([coords.x, coords.y]);
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}
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this[cacheField] = { version: this._improvementVersion, value: result };
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return result;
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},
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_serializeTrenches() {
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const result = [];
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for (const k of this.trenches) {
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const coords = parseKey(k);
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result.push([coords.x, coords.y]);
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}
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return result;
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},
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_serializeTileImprovements() {
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const result = [];
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for (const [k, id] of this.tileImprovements) {
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const coords = parseKey(k);
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result.push([
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coords.x,
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coords.y,
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id,
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this.tileImprovementOwner.get(k) ?? -1,
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this.tileImprovementHp.get(k) || 0,
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]);
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}
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return result;
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},
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// A sparse [x, y, cityId] list of every tile's region, memoised against the
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// region version so an unchanged world is not re-walked on every broadcast.
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_serializeRegions() {
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if (this._serializedRegionsCache &&
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this._serializedRegionsCache.version === this._regionVersion) {
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return this._serializedRegionsCache.value;
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}
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const result = [];
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for (const [k, cityId] of this.tileRegion) {
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const coords = parseKey(k);
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result.push([coords.x, coords.y, cityId]);
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}
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this._serializedRegionsCache = { version: this._regionVersion, value: result };
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return result;
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},
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_serializePopulation() {
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if (this._serializedPopulationCache &&
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this._serializedPopulationCache.version === this._populationVersion) {
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return this._serializedPopulationCache.value;
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}
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const result = [];
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for (const [k, value] of this.tilePopulation) {
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const coords = parseKey(k);
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result.push([coords.x, coords.y, Math.round(value)]);
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}
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this._serializedPopulationCache = { version: this._populationVersion, value: result };
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return result;
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},
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// A sparse [x, y, value] list for a per-tile map, used for the war marks.
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_serializeTileValues(values) {
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const result = [];
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for (const [k, value] of values) {
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const coords = parseKey(k);
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result.push([coords.x, coords.y, value]);
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}
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return result;
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},
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// One entry per civilisation with its headline economy figures, so the
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// diplomacy panel can show every nation's standing without a second lookup.
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_serializeCivStats() {
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return this.civilisations.map((_, index) => ({
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...this._civHeadline(index),
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approval: this.getCivApproval(index),
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popularity: this.getCivPopularity(index),
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cultureImpact: this.getCulturalImpact(index),
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}));
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},
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// One entry per city with its region's population, GDP and tax, so the city
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// government panel can show what each region collects.
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_serializeCityStats() {
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return this.cities.map((city) => {
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const economy = this.getCityEconomy(city);
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return {
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id: city.id,
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civ: city.civ,
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name: city.name,
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isCapital: city.isCapital,
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population: Math.round(economy.population),
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gdp: economy.gdp,
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base: economy.base,
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modifier: economy.base > 0 ? economy.income / economy.base - 1 : 0,
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approval: economy.approval,
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income: economy.income,
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// The region's own income and building upkeep, for the city budget tab.
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budget: this.cityBudgetBreakdown(city, economy),
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// The ethnicity of the region's people, for the circle graph.
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ethnicMakeup: this.getCityEthnicMakeup(city),
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};
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});
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},
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// Population, GDP and GDP per capita for one civilisation: the headline
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// figures the diplomacy panel and the viewer's own stats both show.
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_civHeadline(civ) {
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const aggregates = this._playerAggregates(civ);
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const population = Math.round(aggregates.population);
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const gdp = aggregates.gdp;
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return { population, gdp, gdpPerCapita: population > 0 ? gdp / population : 0 };
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},
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_serializeCivValues(values) {
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const result = [];
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for (let i = 0; i < this.civilisations.length; i++) {
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result.push(values.has(i) ? values.get(i) : 0);
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}
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return result;
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},
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// The points each nation has committed to every technology it has started,
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// as { technologyIndex: points } objects. Work is never lost when the focus
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// changes, so every started technology travels in the snapshot.
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_serializeTechProgress() {
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const result = [];
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for (let i = 0; i < this.civilisations.length; i++) {
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const map = this.techProgress.get(i);
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const record = {};
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if (map) {
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for (const [index, points] of map) {
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if (points > 0) record[index] = points;
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}
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}
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result.push(record);
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}
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return result;
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},
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// The tile improvements under construction, one array per nation, each entry
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// { coords: [x, y], id, elapsedHours, totalHours }.
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_serializeTileWorks() {
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const result = [];
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for (let i = 0; i < this.civilisations.length; i++) {
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const queue = this.tileWorks.get(i) || [];
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result.push(
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queue.map((work) => ({
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coords: [work.coords.x, work.coords.y],
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id: work.id,
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elapsedHours: work.elapsedHours,
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totalHours: work.totalHours,
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}))
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);
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}
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return result;
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},
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_serializeResearched() {
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const result = [];
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for (let i = 0; i < this.civilisations.length; i++) {
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const set = this.researched.get(i) || new Set();
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const indices = Array.from(set).sort((a, b) => a - b);
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result.push(indices);
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}
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return result;
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},
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// How many times each nation has researched every repeatable technology, as
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// { technologyId: count } objects, skipping the unused ones.
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_serializeRepeatCounts() {
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const result = [];
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for (let i = 0; i < this.civilisations.length; i++) {
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const counts = this.repeatCounts.get(i);
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const record = {};
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if (counts) {
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for (const [id, count] of counts) {
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if (count > 0) record[id] = count;
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}
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}
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result.push(record);
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}
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return result;
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},
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// Every unordered pair with its current status. With a handful of
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// civilisations the whole matrix is tiny, and it lets the client show the
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// status of every nation without a second lookup.
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_serializeDiplomacy() {
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const result = [];
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for (let a = 0; a < this.civilisations.length; a++) {
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for (let b = a + 1; b < this.civilisations.length; b++) {
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result.push([a, b, this.getRelation(a, b)]);
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}
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}
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return result;
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},
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// Every ongoing war with its start date and the casualties each side has
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// suffered, broken down into military and civilian dead.
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_serializeConflicts() {
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const result = [];
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for (const conflict of this.conflicts.values()) {
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result.push({
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a: conflict.a,
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b: conflict.b,
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started: conflict.startDate,
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startHours: conflict.startHours,
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sides: [conflict.a, conflict.b].map((civ) => ({
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civ,
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military: conflict.military.get(civ) || 0,
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civilians: Math.round(conflict.civilians.get(civ) || 0),
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})),
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});
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}
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return result;
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},
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_serializeNews() {
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return this.news.map((entry) => ({ ...entry }));
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},
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// One entry per battlefield: [x, y, defenderCiv, attackerCiv]. The tile's
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// owner is the defender when present; otherwise the lowest-numbered civ on
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// the tile defends. The browser uses this to draw the two stacks facing each
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// other with the battle icon between them.
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_serializeBattles() {
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const result = [];
|
||
for (const battle of this._battleTiles()) {
|
||
const civs = Array.from(battle.civs).sort((a, b) => a - b);
|
||
const owner = this.civAt(battle.coords);
|
||
const defender = this._defenderCiv(battle, civs, owner);
|
||
const attacker = civs.find((civ) => civ !== defender);
|
||
if (attacker === undefined) continue;
|
||
result.push([battle.coords.x, battle.coords.y, defender, attacker]);
|
||
}
|
||
return result;
|
||
},
|
||
|
||
// The side that charged in is the attacker; the occupants defend. When that is
|
||
// ambiguous (a mutual charge, or a third party) fall back to the tile's owner
|
||
// and then to the lowest-numbered civ present.
|
||
_defenderCiv(battle, civs, owner) {
|
||
const invaders = new Set();
|
||
let hasDefender = false;
|
||
for (const unit of battle.units) {
|
||
if (unit.invader) invaders.add(unit.civ);
|
||
else hasDefender = true;
|
||
}
|
||
const defenders = civs.filter((civ) => !invaders.has(civ));
|
||
if (invaders.size > 0 && hasDefender && defenders.length > 0) {
|
||
if (defenders.length === 1) return defenders[0];
|
||
return defenders.includes(owner) ? owner : defenders[0];
|
||
}
|
||
return civs.includes(owner) ? owner : civs[0];
|
||
},
|
||
|
||
// --------------------------------------------------------- politics --
|
||
|
||
// Every nation's share of world culture, as a fraction per civilisation.
|
||
_serializeCultureImpact() {
|
||
return this.civilisations.map((_, index) =>
|
||
roundTo(this.getCulturalImpact(index), 4)
|
||
);
|
||
},
|
||
|
||
// approval[a][b] is the share of civilisation a's people who approve of
|
||
// civilisation b's government. The diagonal is each nation's own standing.
|
||
// The N×N matrix weights every nation's opinion over every tile it holds, so
|
||
// it is memoised against the politics version: snapshots are broadcast on
|
||
// every dirty frame but approval only moves when politics does.
|
||
_serializeApproval() {
|
||
if (this._approvalMatrixCache && this._approvalMatrixCache.version === this._politicsVersion) {
|
||
return this._approvalMatrixCache.value;
|
||
}
|
||
const result = [];
|
||
for (let a = 0; a < this.civilisations.length; a++) {
|
||
const row = [];
|
||
for (let b = 0; b < this.civilisations.length; b++) {
|
||
row.push(roundTo(this._weightedOpinions(this._territoryByCiv.get(a) || [], b).approval, 3));
|
||
}
|
||
result.push(row);
|
||
}
|
||
this._approvalMatrixCache = { version: this._politicsVersion, value: result };
|
||
return result;
|
||
},
|
||
|
||
// Sparse [x, y, [[ethnicity, share, trend], ...]] for every populated tile,
|
||
// where trend is the net migration over the last day. Memoised against the
|
||
// ethnicity version and the current migration delta store: the shares only
|
||
// move when politics does, so re-walking every populated tile on every 10 Hz
|
||
// broadcast was pure waste (the delta wire format drops it anyway).
|
||
_serializeTileEthnicity() {
|
||
const cache = this._serializedTileEthnicityCache;
|
||
if (cache &&
|
||
cache.version === this._ethnicityVersion &&
|
||
cache.deltas === this._migrationDeltas.tile) {
|
||
return cache.value;
|
||
}
|
||
const result = [];
|
||
for (const [k, shares] of this.tileEthnicity) {
|
||
const coords = parseKey(k);
|
||
const entries = [];
|
||
for (const [ethnicity, share] of shares) {
|
||
if (share < 0.005) continue;
|
||
entries.push([
|
||
ethnicity,
|
||
roundTo(share, 3),
|
||
Math.round(this._trendAt(this._migrationDeltas.tile, k, ethnicity)),
|
||
]);
|
||
}
|
||
if (entries.length === 0) continue;
|
||
result.push([coords.x, coords.y, entries]);
|
||
}
|
||
this._serializedTileEthnicityCache = {
|
||
version: this._ethnicityVersion,
|
||
deltas: this._migrationDeltas.tile,
|
||
value: result,
|
||
};
|
||
return result;
|
||
},
|
||
|
||
_serializePolicies() {
|
||
const result = [];
|
||
for (let civ = 0; civ < this.civilisations.length; civ++) {
|
||
const record = this.policies.get(civ) || [];
|
||
result.push({
|
||
civ,
|
||
list: record.map((policy) => ({
|
||
id: policy.id,
|
||
type: policy.type,
|
||
ethnicity: policy.ethnicity,
|
||
})),
|
||
});
|
||
}
|
||
return result;
|
||
},
|
||
|
||
_serializeCampaigns() {
|
||
return this.campaigns.map((campaign) => ({
|
||
id: campaign.id,
|
||
civ: campaign.civ,
|
||
observer: campaign.observer,
|
||
targetKind: campaign.targetKind,
|
||
target: campaign.target,
|
||
direction: campaign.direction,
|
||
hourlyCost: campaign.hourlyCost,
|
||
startedHours: campaign.startedHours,
|
||
}));
|
||
},
|
||
|
||
// The last day's migration into and out of each country, with each flow as
|
||
// [ethnicity, people].
|
||
_serializeMigrations() {
|
||
const result = [];
|
||
for (let civ = 0; civ < this.civilisations.length; civ++) {
|
||
const flow = this.migrations.get(civ);
|
||
result.push({
|
||
civ,
|
||
inbound: mapToEntries(flow ? flow.inbound : null),
|
||
outbound: mapToEntries(flow ? flow.outbound : null),
|
||
});
|
||
}
|
||
return result;
|
||
},
|
||
|
||
// A dense observer x target matrix. A missing entry is the neutral baseline.
|
||
_serializeOpinionMatrix(store) {
|
||
const result = [];
|
||
for (let observer = 0; observer < this.civilisations.length; observer++) {
|
||
const inner = store.get(observer);
|
||
const row = [];
|
||
for (let target = 0; target < this.civilisations.length; target++) {
|
||
row.push(roundTo(inner && inner.has(target) ? inner.get(target) : OPINION.baseline, 3));
|
||
}
|
||
result.push(row);
|
||
}
|
||
return result;
|
||
},
|
||
|
||
// The government matrix folds each war crime grudge into the base opinion.
|
||
_serializeGovOpinionMatrix() {
|
||
const result = [];
|
||
for (let observer = 0; observer < this.civilisations.length; observer++) {
|
||
const row = [];
|
||
for (let target = 0; target < this.civilisations.length; target++) {
|
||
row.push(roundTo(this.getGovOpinion(observer, target), 3));
|
||
}
|
||
result.push(row);
|
||
}
|
||
return result;
|
||
},
|
||
};
|
||
|
||
function roundTo(value, digits) {
|
||
const factor = Math.pow(10, digits);
|
||
return Math.round(value * factor) / factor;
|
||
}
|
||
|
||
// A cheap, stable fingerprint of the serialised city stats. Comparing it lets
|
||
// the server treat cityStats like the other versioned collections without
|
||
// having to hook every economy-affecting mutation (pillage, battle scars,
|
||
// approval drift, research) individually.
|
||
function hashCityStats(stats) {
|
||
const text = JSON.stringify(stats);
|
||
let hash = 2166136261;
|
||
for (let i = 0; i < text.length; i++) {
|
||
hash = Math.imul(hash ^ text.charCodeAt(i), 16777619);
|
||
}
|
||
return `${text.length}:${(hash >>> 0).toString(36)}`;
|
||
}
|
||
|
||
// A Map<ethnicity, number> as sorted [ethnicity, roundedNumber] pairs, dropping
|
||
// zero entries.
|
||
function mapToEntries(map) {
|
||
if (!map) return [];
|
||
const result = [];
|
||
for (const [ethnicity, value] of map) {
|
||
const rounded = Math.round(value);
|
||
if (rounded === 0) continue;
|
||
result.push([ethnicity, rounded]);
|
||
}
|
||
result.sort((a, b) => b[1] - a[1]);
|
||
return result;
|
||
}
|