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Refactor route merging logic for improved performance

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Azgaar 2024-05-23 03:33:54 +02:00
parent 29e7ab0953
commit 4e79e020e8
4 changed files with 91 additions and 57 deletions
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44
modules/routes-generator.js
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@ -124,35 +124,47 @@ window.Routes = (function () {
function combineRoutes() {
const routes = [];
for (const {feature, cells} of mainRoads) {
for (const {feature, cells, merged} of mergeRoutes(mainRoads)) {
if (merged) continue;
routes.push({i: routes.length, group: "roads", feature, cells});
}
// merge routes so that the last cells of one route are the first cells of the next route
for (let i = 0; i < trails.length; i++) {
const {cells, feature, merged} = trails[i];
for (const {feature, cells, merged} of mergeRoutes(trails)) {
if (merged) continue;
for (let j = i + 1; j < trails.length; j++) {
const nextTrail = trails[j];
if (nextTrail.merged) continue;
if (nextTrail.cells[0] === cells.at(-1)) {
cells.push(...nextTrail.cells.slice(1));
nextTrail.merged = true;
}
}
routes.push({i: routes.length, group: "trails", feature, cells});
}
for (const {feature, cells} of seaRoutes) {
for (const {feature, cells, merged} of mergeRoutes(seaRoutes)) {
if (merged) continue;
routes.push({i: routes.length, group: "searoutes", feature, cells});
}
return routes;
}
// merge routes so that the last cell of one route is the first cell of the next route
function mergeRoutes(routes) {
let routesMerged = 0;
for (let i = 0; i < routes.length; i++) {
const thisRoute = routes[i];
if (thisRoute.merged) continue;
for (let j = i + 1; j < routes.length; j++) {
const nextRoute = routes[j];
if (nextRoute.merged) continue;
if (nextRoute.cells.at(0) === thisRoute.cells.at(-1)) {
routesMerged++;
thisRoute.cells = thisRoute.cells.concat(nextRoute.cells.slice(1));
nextRoute.merged = true;
}
}
}
return routesMerged > 1 ? mergeRoutes(routes) : routes;
}
function buildLinks(routes) {
const links = {};