mirror of
https://github.com/Azgaar/Fantasy-Map-Generator.git
synced 2025-12-18 18:11:24 +01:00
315 lines
11 KiB
JavaScript
315 lines
11 KiB
JavaScript
"use strict";
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window.Submap = (function () {
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/*
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generate new map based on an existing one (resampling parentMap)
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parentMap: {grid, pack, notes} from original map
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options = {
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smoothHeightmap: Bool; run smooth filter on heights
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depressRivers: Bool; lower elevation of riverbed cells
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projection: f(Number, Number) -> [Number, Number]
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inverse: f(Number, Number) -> [Number, Number]
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}
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*/
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function resample(parentMap, options) {
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const {projection, inverse} = options;
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grid = generateGrid();
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pack = {};
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notes = parentMap.notes;
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resamplePrimaryGridData(parentMap, inverse);
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Features.markupGrid();
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addLakesInDeepDepressions();
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openNearSeaLakes();
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OceanLayers();
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calculateMapCoordinates();
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calculateTemperatures();
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generatePrecipitation();
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reGraph();
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Features.markupPack();
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createDefaultRuler();
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Rivers.generate();
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Biomes.define();
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rankCells();
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restoreSecondaryCellData(parentMap, inverse);
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restoreCultures(parentMap, projection);
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restoreBurgs(parentMap, projection, options);
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restoreStates(parentMap, projection);
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restoreRoutes(parentMap, projection);
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restoreReligions(parentMap, projection);
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restoreProvinces(parentMap);
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restoreMarkers(parentMap, projection);
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restoreZones(parentMap, projection, options);
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restoreFeatureDetails(parentMap, inverse);
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Rivers.specify();
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showStatistics();
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}
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function resamplePrimaryGridData(parentMap, inverse) {
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grid.cells.h = new Uint8Array(grid.points.length);
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grid.cells.temp = new Int8Array(grid.points.length);
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grid.cells.prec = new Uint8Array(grid.points.length);
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grid.points.forEach(([x, y], newGridCell) => {
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const [parentX, parentY] = inverse(x, y);
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const parentPackCell = parentMap.pack.cells.q.find(parentX, parentY, Infinity)[2];
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const parentGridCell = parentMap.pack.cells.g[parentPackCell];
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grid.cells.h[newGridCell] = parentMap.grid.cells.h[parentGridCell];
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grid.cells.temp[newGridCell] = parentMap.grid.cells.temp[parentGridCell];
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grid.cells.prec[newGridCell] = parentMap.grid.cells.prec[parentGridCell];
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});
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if (options.smoothHeightmap) smoothHeightmap();
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if (options.depressRivers) depressRivers(parentMap, inverse);
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}
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function smoothHeightmap() {
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grid.cells.h.forEach((height, newGridCell) => {
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const heights = [height, ...grid.cells.c[newGridCell].map(c => grid.cells.h[c])];
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const meanHeight = d3.mean(heights);
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grid.cells.h[newGridCell] = isWater(grid, newGridCell) ? Math.min(meanHeight, 19) : Math.max(meanHeight, 20);
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});
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}
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function depressRivers(parentMap, inverse) {
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// lower elevation of cells with rivers by 1
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grid.cells.points.forEach(([x, y], newGridCell) => {
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const [parentX, parentY] = inverse(x, y);
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const parentPackCell = parentMap.pack.cells.q.find(parentX, parentY, Infinity)[2];
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const hasRiver = Boolean(parentMap.pack.cells.r[parentPackCell]);
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if (hasRiver && grid.cells.h[newGridCell] > 20) grid.cells.h[newGridCell] -= 1;
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});
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}
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function restoreSecondaryCellData(parentMap, inverse) {
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pack.cells.culture = new Uint16Array(pack.cells.i.length);
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pack.cells.state = new Uint16Array(pack.cells.i.length);
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pack.cells.burg = new Uint16Array(pack.cells.i.length);
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pack.cells.religion = new Uint16Array(pack.cells.i.length);
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pack.cells.province = new Uint16Array(pack.cells.i.length);
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const parentPackCellGroups = groupCellsByType(parentMap.pack);
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const parentPackLandCellsQuadtree = d3.quadtree(parentPackCellGroups.land);
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for (const newPackCell of pack.cells.i) {
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const [x, y] = inverse(...pack.cells.p[newPackCell]);
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if (isWater(pack, newPackCell)) {
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} else {
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const parentPackCell = parentPackLandCellsQuadtree.find(x, y, Infinity)[2];
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pack.cells.culture[newPackCell] = parentMap.pack.cells.culture[parentPackCell];
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pack.cells.state[newPackCell] = parentMap.pack.cells.state[parentPackCell];
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pack.cells.religion[newPackCell] = parentMap.pack.cells.religion[parentPackCell];
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pack.cells.province[newPackCell] = parentMap.pack.cells.province[parentPackCell];
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}
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}
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}
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function restoreCultures(parentMap, projection) {
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const validCultures = new Set(pack.cells.culture);
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const culturePoles = getPolesOfInaccessibility(pack, cellId => pack.cells.culture[cellId]);
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pack.cultures = parentMap.pack.cultures.map(culture => {
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if (!culture.i || culture.removed) return culture;
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if (!validCultures.has(culture.i)) return {...culture, removed: true, lock: false};
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const [xp, yp] = projection(...parentMap.pack.cells.p[culture.center]);
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const [x, y] = [rn(xp, 2), rn(yp, 2)];
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const centerCoords = isInMap(x, y) ? [x, y] : culturePoles[culture.i];
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const center = findCell(...centerCoords);
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return {...culture, center};
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});
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}
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function restoreBurgs(parentMap, projection, options) {
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const packLandCellsQuadtree = d3.quadtree(groupCellsByType(pack).land);
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const findLandCell = (x, y) => packLandCellsQuadtree.find(x, y, Infinity)?.[2];
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pack.burgs = parentMap.pack.burgs.map(burg => {
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if (!burg.i || burg.removed) return burg;
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burg.population *= options.scale; // adjust for populationRate change
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const [xp, yp] = projection(burg.x, burg.y);
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if (!isInMap(xp, yp)) return {...burg, removed: true, lock: false};
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const closestCell = findCell(xp, yp);
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const cell = isWater(pack, closestCell) ? findLandCell(xp, yp) : closestCell;
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if (pack.cells.burg[cell]) {
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WARN && console.warn(`Cell ${cell} already has a burg. Removing burg ${burg.name} (${burg.i})`);
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return {...burg, removed: true, lock: false};
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}
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pack.cells.burg[cell] = burg.i;
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const [x, y] = getBurgCoordinates(burg, closestCell, cell, xp, yp);
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return {...burg, cell, x, y};
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});
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function getBurgCoordinates(burg, closestCell, cell, xp, yp) {
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const haven = pack.cells.haven[cell];
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if (burg.port && haven) return BurgsAndStates.getCloseToEdgePoint(cell, haven);
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if (closestCell !== cell) return pack.cells.p[cell];
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return [rn(xp, 2), rn(yp, 2)];
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}
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}
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function restoreStates(parentMap, projection) {
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const validStates = new Set(pack.cells.state);
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pack.states = parentMap.pack.states.map(state => {
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if (!state.i || state.removed) return state;
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if (!validStates.has(state.i)) return {...state, removed: true, lock: false};
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const military = state.military.map(regiment => {
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const cell = findCell(...projection(...parentMap.pack.cells.p[regiment.cell]));
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const [xBase, yBase] = projection(regiment.bx, regiment.by);
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const [xCurrent, yCurrent] = projection(regiment.x, regiment.y);
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return {...regiment, cell, bx: rn(xBase, 2), by: rn(yBase, 2), x: rn(xCurrent, 2), y: rn(yCurrent, 2)};
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});
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const neighbors = state.neighbors.filter(stateId => validStates.has(stateId));
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return {...state, neighbors, military};
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});
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BurgsAndStates.getPoles();
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pack.states.forEach(state => {
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if (!state.i || state.removed) return;
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const capital = pack.burgs[state.capital];
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state.center = !capital?.removed ? capital.cell : findCell(...state.pole);
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});
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}
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function restoreRoutes(parentMap, projection) {
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pack.routes = parentMap.pack.routes
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.map(route => {
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const points = route.points
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.map(([parentX, parentY]) => {
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const [x, y] = projection(parentX, parentY);
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if (!isInMap(x, y)) return null;
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const cell = findCell(x, y);
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return [rn(x, 2), rn(y, 2), cell];
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})
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.filter(Boolean);
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if (points.length < 2) return null;
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const firstCell = points[0][2];
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const feature = pack.cells.f[firstCell];
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return {...route, feature, points};
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})
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.filter(Boolean);
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pack.cells.routes = Routes.buildLinks(pack.routes);
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}
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function restoreReligions(parentMap, projection) {
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const validReligions = new Set(pack.cells.religion);
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const religionPoles = getPolesOfInaccessibility(pack, cellId => pack.cells.religion[cellId]);
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pack.religions = parentMap.pack.religions.map(religion => {
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if (!religion.i || religion.removed) return religion;
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if (!validReligions.has(religion.i)) return {...religion, removed: true, lock: false};
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const [xp, yp] = projection(...parentMap.pack.cells.p[religion.center]);
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const [x, y] = [rn(xp, 2), rn(yp, 2)];
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const centerCoords = isInMap(x, y) ? [x, y] : religionPoles[religion.i];
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const center = findCell(...centerCoords);
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return {...religion, center};
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});
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}
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function restoreProvinces(parentMap) {
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const validProvinces = new Set(pack.cells.province);
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pack.provinces = parentMap.pack.provinces.map(province => {
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if (!province.i || province.removed) return province;
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if (!validProvinces.has(province.i)) return {...province, removed: true, lock: false};
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return province;
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});
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Provinces.getPoles();
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pack.provinces.forEach(province => {
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if (!province.i || province.removed) return;
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const capital = pack.burgs[province.burg];
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province.center = !capital?.removed ? capital.cell : findCell(...province.pole);
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});
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}
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function restoreMarkers(parentMap, projection) {
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pack.markers = parentMap.pack.markers;
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pack.markers.forEach(marker => {
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const [x, y] = projection(marker.x, marker.y);
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if (!isInMap(x, y)) Markers.deleteMarker(marker.i);
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const cell = findCell(x, y);
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marker.x = rn(x, 2);
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marker.y = rn(y, 2);
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marker.cell = cell;
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});
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}
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function restoreZones(parentMap, projection, options) {
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const getSearchRadius = cellId => Math.sqrt(parentMap.pack.cells.area[cellId] / Math.PI) * options.scale;
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pack.zones = parentMap.pack.zones.map(zone => {
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const cells = zone.cells
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.map(cellId => {
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const [x, y] = projection(...parentMap.pack.cells.p[cellId]);
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if (!isInMap(x, y)) return null;
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return findAll(x, y, getSearchRadius(cellId));
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})
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.filter(Boolean)
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.flat();
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return {...zone, cells: unique(cells)};
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});
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}
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function restoreFeatureDetails(parentMap, inverse) {
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pack.features.forEach(feature => {
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if (!feature) return;
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const [x, y] = pack.cells.p[feature.firstCell];
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const [parentX, parentY] = inverse(x, y);
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const parentCell = parentMap.pack.cells.q.find(parentX, parentY, Infinity)[2];
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if (parentCell === undefined) return;
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const parentFeature = parentMap.pack.features[parentMap.pack.cells.f[parentCell]];
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if (parentFeature.group) feature.group = parentFeature.group;
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if (parentFeature.name) feature.name = parentFeature.name;
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if (parentFeature.height) feature.height = parentFeature.height;
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});
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}
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function groupCellsByType(graph) {
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return graph.cells.p.reduce(
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(acc, [x, y], cellId) => {
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const group = isWater(graph, cellId) ? "water" : "land";
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acc[group].push([x, y, cellId]);
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return acc;
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},
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{land: [], water: []}
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);
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}
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function isWater(graph, cellId) {
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return graph.cells.h[cellId] < 20;
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}
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function isInMap(x, y) {
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return x >= 0 && x <= graphWidth && y >= 0 && y <= graphHeight;
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}
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return {resample};
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})();
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