468 lines
31 KiB
JavaScript
468 lines
31 KiB
JavaScript
"use strict";
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const fs = require("fs");
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const path = require("path");
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const OVERRIDE_SCHEMA = "native-road-overrides/v1";
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const MOTOR_HIGHWAYS = new Set(["motorway", "trunk", "primary", "secondary", "tertiary", "unclassified", "residential", "living_street", "service"]);
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const DEFAULT_WIDTHS = { motorway: 12, trunk: 10, primary: 10, secondary: 8, tertiary: 7, unclassified: 6, residential: 6, living_street: 5, service: 4 };
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function parseOsmRoads(xml) {
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const nodes = new Map();
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for (const match of xml.matchAll(/<node\b([^>]*?)(?:\/>|>([\s\S]*?)<\/node>)/g)) {
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const attrs = xmlAttrs(match[1]);
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if (attrs.action === "delete" || !attrs.id || attrs.lon === undefined || attrs.lat === undefined) continue;
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const coordinate = [Number(attrs.lon), Number(attrs.lat)];
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if (coordinate.every(Number.isFinite)) nodes.set(String(attrs.id), coordinate);
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}
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const ways = [];
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for (const match of xml.matchAll(/<way\b([^>]*)>([\s\S]*?)<\/way>/g)) {
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const attrs = xmlAttrs(match[1]);
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const body = match[2];
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const tags = parseTags(body);
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if (attrs.action === "delete" || !MOTOR_HIGHWAYS.has(tags.highway || "")) continue;
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const refs = [...body.matchAll(/<nd\b([^>]*)\/?\s*>/g)].map((item) => xmlAttrs(item[1]).ref).filter(Boolean);
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const coords = refs.map((ref) => nodes.get(String(ref))).filter(Boolean);
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if (coords.length < 2 || coords.length !== refs.length) continue;
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ways.push({ id: String(attrs.id), refs: refs.map(String), coords, tags });
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}
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return { nodes, ways };
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}
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function compileRoadModel(xml, overrides) {
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const parsed = parseOsmRoads(xml);
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const diagnostics = [];
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const roads = [];
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const endpoints = [];
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const byNode = new Map();
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for (const way of parsed.ways) {
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const directions = way.tags.oneway === "yes" || way.tags.oneway === "1" || way.tags.junction === "roundabout" ? ["forward"] : ["forward", "backward"];
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for (const direction of directions) {
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const base = roadAttributes(way.tags, direction);
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const id = `road:way/${way.id}:${direction}`;
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const road = { id, osmWayIds: [way.id], direction, highway: way.tags.highway, centerline: direction === "forward" ? way.coords : [...way.coords].reverse(), sourceNodeIds: direction === "forward" ? [way.refs[0], way.refs.at(-1)] : [way.refs.at(-1), way.refs[0]], tags: way.tags, ...base, appliedOverrideIds: [], diagnostics: [] };
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applyRoadOverrides(road, overrides, diagnostics);
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roads.push(road);
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for (const side of ["start", "end"]) {
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const nodeId = side === "start" ? road.sourceNodeIds[0] : road.sourceNodeIds[1];
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const endpoint = { id: `endpoint:${road.id}:${side}`, roadId: id, side, nodeId, coordinate: side === "start" ? road.centerline[0] : road.centerline.at(-1), direction };
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endpoints.push(endpoint);
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if (!byNode.has(nodeId)) byNode.set(nodeId, []);
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byNode.get(nodeId).push(endpoint);
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}
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}
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}
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const connections = resolveConnections(endpoints, byNode, overrides, diagnostics);
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const extent = roadExtent(roads);
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for (const [nodeId, items] of byNode) {
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if (items.length === 1 && distanceToExtentEdgeMeters(items[0].coordinate, extent) > 25) {
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const endpoint = items[0];
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diagnostics.push({ ...diagnostic("warning", endpoint.roadId, [nodeId], "unconnected-interior-road-end", "道路在区域内部结束，未连接到其他机动车道路。请确认这是实际断头，还是 OSM 节点尚未连接。", endpoint.coordinate), endpointId: endpoint.id });
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}
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}
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return { schema: "native-road-model/v1", roads, endpoints, connections, diagnostics };
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}
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function roadExtent(roads) {
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const points = roads.flatMap((road) => road.centerline);
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return { minLon: Math.min(...points.map((point) => point[0])), maxLon: Math.max(...points.map((point) => point[0])), minLat: Math.min(...points.map((point) => point[1])), maxLat: Math.max(...points.map((point) => point[1])) };
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}
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function distanceToExtentEdgeMeters(point, extent) {
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const lonScale = 111320 * Math.cos(point[1] * Math.PI / 180);
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return Math.min((point[0] - extent.minLon) * lonScale, (extent.maxLon - point[0]) * lonScale, (point[1] - extent.minLat) * 111320, (extent.maxLat - point[1]) * 111320);
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}
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function roadAttributes(tags, direction) {
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const directional = direction === "forward" ? "forward" : "backward";
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const laneTag = tags[`lanes:${directional}`] ?? (tags.oneway === "yes" ? tags.lanes : null);
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const parsedLanes = positiveInteger(laneTag);
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const totalLanes = positiveInteger(tags.lanes);
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const lanes = parsedLanes || (totalLanes ? Math.max(1, Math.ceil(totalLanes / (tags.oneway === "yes" ? 1 : 2))) : 1);
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const parsedWidth = positiveNumber(tags.width);
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const forwardLanes = positiveInteger(tags["lanes:forward"]);
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const backwardLanes = positiveInteger(tags["lanes:backward"]);
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const directionalLaneTotal = forwardLanes && backwardLanes ? forwardLanes + backwardLanes : totalLanes;
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// `width` describes the whole OSM way. A directional road receives its lane
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// share; absent width falls back to a realistic per-lane carriageway width.
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const width = parsedWidth ? parsedWidth * lanes / (directionalLaneTotal || (tags.oneway === "yes" ? lanes : lanes * 2)) : lanes * 3.25;
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return {
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laneCount: lanes,
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widthMeters: width,
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sidewalkLeft: sidewalkState(tags, direction, "left"),
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sidewalkRight: sidewalkState(tags, direction, "right"),
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provenance: {
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laneCount: parsedLanes || totalLanes ? `tag:${parsedLanes ? `lanes:${directional}` : "lanes"}` : "inferred:default-lanes",
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widthMeters: parsedWidth ? "tag:width (按方向车道数分配)" : "inferred:3.25m-per-lane",
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},
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};
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}
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function sidewalkState(tags, direction, side) {
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const osmSide = direction === "forward" ? side : side === "left" ? "right" : "left";
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const value = tags[`sidewalk:${osmSide}`] ?? tags.sidewalk;
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return value === "both" || value === "yes" || value === osmSide;
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}
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function loadOverrides(file) {
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if (!fs.existsSync(file)) return { schema: OVERRIDE_SCHEMA, overrides: [] };
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return validateOverrides(JSON.parse(fs.readFileSync(file, "utf8")));
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}
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function validateOverrides(value, model) {
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if (!value || value.schema !== OVERRIDE_SCHEMA || !Array.isArray(value.overrides)) throw new Error(`Overrides must use ${OVERRIDE_SCHEMA}.`);
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const ids = new Set();
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const roadIds = model ? new Set(model.roads.map((road) => road.id)) : null;
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const endpointIds = model ? new Set(model.endpoints.map((endpoint) => endpoint.id)) : null;
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const laneIds = model ? new Set(model.roads.flatMap((road) => Array.from({ length: road.laneCount }, (_, index) => `lane:${road.id}:${index + 1}`))) : null;
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for (const item of value.overrides) {
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if (!item || typeof item.id !== "string" || !item.id || ids.has(item.id)) throw new Error("Each override needs a unique id.");
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ids.add(item.id);
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if (item.kind === "road") {
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if (typeof item.roadId !== "string" || roadIds && !roadIds.has(item.roadId)) throw new Error(`Unknown road override target: ${item.roadId}`);
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for (const key of ["widthMeters", "laneCount"]) if (item[key] !== undefined && (!Number.isFinite(item[key]) || item[key] <= 0 || (key === "laneCount" && !Number.isInteger(item[key])))) throw new Error(`Invalid road override ${key}.`);
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for (const key of ["sidewalkLeft", "sidewalkRight"]) if (item[key] !== undefined && typeof item[key] !== "boolean") throw new Error(`Invalid road override ${key}.`);
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} else if (item.kind === "junction-connection") {
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if (typeof item.fromEndpointId !== "string" || typeof item.toEndpointId !== "string" || typeof item.enabled !== "boolean" || (endpointIds && (!endpointIds.has(item.fromEndpointId) || !endpointIds.has(item.toEndpointId)))) throw new Error("Invalid junction connection override.");
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if (model && !connectionEndpointsCompatible(model, item.fromEndpointId, item.toEndpointId)) throw new Error("A manual junction connection must go from a road end to a nearby road start (within 35m).");
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} else if (item.kind === "lane-connection") {
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if (typeof item.fromLaneId !== "string" || typeof item.toLaneId !== "string" || typeof item.enabled !== "boolean" || (laneIds && (!laneIds.has(item.fromLaneId) || !laneIds.has(item.toLaneId)))) throw new Error("Invalid lane connection override.");
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} else throw new Error(`Unsupported override kind: ${item.kind}`);
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}
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return { schema: OVERRIDE_SCHEMA, overrides: value.overrides };
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}
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function applyRoadOverrides(road, overrides, diagnostics) {
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for (const item of overrides.overrides.filter((entry) => entry.kind === "road" && entry.roadId === road.id)) {
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for (const key of ["widthMeters", "laneCount", "sidewalkLeft", "sidewalkRight"]) if (item[key] !== undefined) road[key] = item[key];
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road.appliedOverrideIds.push(item.id);
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for (const key of ["widthMeters", "laneCount"]) if (item[key] !== undefined) road.provenance[key] = `override:${item.id}`;
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}
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if (road.widthMeters < road.laneCount * 2.4) diagnostics.push(diagnostic("warning", road.id, road.osmWayIds, "narrow-lane-width", "Configured road width is narrow for the selected lane count.", road.centerline[0]));
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}
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function resolveConnections(endpoints, byNode, overrides, diagnostics) {
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const result = [];
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for (const [nodeId, items] of byNode) {
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const arrivals = items.filter((endpoint) => endpoint.side === "end");
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const departures = items.filter((endpoint) => endpoint.side === "start");
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for (const arrival of arrivals) for (const departure of departures) {
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if (arrival.roadId === departure.roadId) continue;
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const arrivalRoad = endpoints.find((endpoint) => endpoint.id === arrival.id)?.roadId;
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const departureRoad = endpoints.find((endpoint) => endpoint.id === departure.id)?.roadId;
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if (sameOsmWay(endpoints, arrivalRoad, departureRoad)) continue;
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const override = overrides.overrides.find((entry) => entry.kind === "junction-connection" && entry.fromEndpointId === arrival.id && entry.toEndpointId === departure.id);
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result.push({ id: `connection:${arrival.id}:${departure.id}`, nodeId, fromEndpointId: arrival.id, toEndpointId: departure.id, enabled: override ? override.enabled : true, provenance: override ? `override:${override.id}` : "osm:shared-node" });
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}
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if (items.length > 8) diagnostics.push(diagnostic("warning", `junction:node/${nodeId}`, [nodeId], "complex-junction", "Junction has more than eight directional endpoints and is not compiled as an ordinary junction.", items[0].coordinate));
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}
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// Overrides can add a deliberate movement omitted by the initial inference.
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// Keep it only when both endpoints still belong to the same OSM junction.
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for (const override of overrides.overrides.filter((item) => item.kind === "junction-connection")) {
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const exists = result.some((connection) => connection.fromEndpointId === override.fromEndpointId && connection.toEndpointId === override.toEndpointId);
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if (exists) continue;
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const from = endpoints.find((endpoint) => endpoint.id === override.fromEndpointId);
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const to = endpoints.find((endpoint) => endpoint.id === override.toEndpointId);
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if (!from || !to || !connectionEndpointsCompatible({ endpoints }, from.id, to.id)) continue;
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result.push({ id: `connection:${from.id}:${to.id}`, nodeId: from.nodeId, fromEndpointId: from.id, toEndpointId: to.id, enabled: override.enabled, provenance: `override:${override.id}` });
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}
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return result;
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}
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function endpointNode(model, endpointId) { return model.endpoints.find((endpoint) => endpoint.id === endpointId)?.nodeId; }
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function sameOsmWay(endpoints, firstRoadId, secondRoadId) {
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const wayId = (roadId) => roadId.split(":")[1];
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return wayId(firstRoadId) === wayId(secondRoadId);
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}
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function connectionEndpointsCompatible(model, fromId, toId) {
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const from = model.endpoints.find((endpoint) => endpoint.id === fromId);
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const to = model.endpoints.find((endpoint) => endpoint.id === toId);
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if (!from || !to || from.roadId === to.roadId || from.side !== "end" || to.side !== "start") return false;
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if (from.nodeId === to.nodeId) return true;
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const dx = (from.coordinate[0] - to.coordinate[0]) * 111320 * Math.cos(from.coordinate[1] * Math.PI / 180);
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const dy = (from.coordinate[1] - to.coordinate[1]) * 111320;
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return Math.hypot(dx, dy) <= 35;
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}
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function compileGeometry(model, overrides = { overrides: [] }) {
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const diagnostics = [...model.diagnostics];
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const features = [];
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const emittedWays = new Set();
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for (const road of model.roads) {
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const wayKey = road.osmWayIds.join(",");
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if (emittedWays.has(wayKey)) continue;
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emittedWays.add(wayKey);
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const directions = model.roads.filter((item) => item.osmWayIds.join(",") === wayKey);
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const totalWidth = directions.reduce((sum, item) => sum + item.widthMeters, 0);
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const ring = roadRing(road.centerline, totalWidth);
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if (!ring) { diagnostics.push(diagnostic("error", road.id, road.osmWayIds, "unclosed-road-surface", "Could not construct a valid road polygon from this centerline.", road.centerline[0])); continue; }
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features.push({ type: "Feature", properties: { native_id: `surface:way/${wayKey}`, directional_road_ids: directions.map((item) => item.id).join(","), osm_way_ids: wayKey, width_m: totalWidth, lane_count: directions.reduce((sum, item) => sum + item.laneCount, 0), provenance: JSON.stringify(directions.map((item) => item.provenance)), override_ids: directions.flatMap((item) => item.appliedOverrideIds).join(",") }, geometry: { type: "Polygon", coordinates: [ring] } });
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}
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const lanes = compileLaneCenterlines(model, diagnostics);
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const connectors = compileConnectors(model, lanes, diagnostics, overrides);
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const junctionFeatures = compileJunctionSurfaces(model, lanes, connectors, diagnostics);
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validateConnectorContainment(connectors, junctionFeatures, diagnostics);
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return { roadSurface: { type: "FeatureCollection", features }, intersectionSurface: { type: "FeatureCollection", features: junctionFeatures }, laneCenterlines: { type: "FeatureCollection", features: lanes.features }, connectors: { type: "FeatureCollection", features: connectors }, diagnostics };
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}
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function validateConnectorContainment(connectors, junctionFeatures, diagnostics) {
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const junctionByNode = new Map(junctionFeatures.map((feature) => [feature.properties.osm_node_id, feature]));
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for (const connector of connectors) {
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const junction = junctionByNode.get(connector.properties.node_id);
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if (!junction) continue;
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const ring = junction.geometry.coordinates[0];
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if (!connector.geometry.coordinates.every((point) => pointInPolygon(point, ring))) {
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diagnostics.push(diagnostic("warning", connector.properties.connection_id, [connector.properties.node_id], "connector-outside-junction", "转向路径有部分落在路口面外，请检查道路截面或转向连接。", connector.geometry.coordinates[0]));
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}
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}
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}
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function pointInPolygon(point, ring) {
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for (let index = 1; index < ring.length; index += 1) if (pointOnSegment(point, ring[index - 1], ring[index])) return true;
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let inside = false;
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for (let index = 0, previous = ring.length - 1; index < ring.length; previous = index++) {
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const a = ring[index]; const b = ring[previous];
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const intersect = a[1] > point[1] !== b[1] > point[1] && point[0] < (b[0] - a[0]) * (point[1] - a[1]) / (b[1] - a[1]) + a[0];
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if (intersect) inside = !inside;
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}
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return inside;
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}
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function pointOnSegment(point, a, b) {
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const cross = (point[0] - a[0]) * (b[1] - a[1]) - (point[1] - a[1]) * (b[0] - a[0]);
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if (Math.abs(cross) > 1e-12) return false;
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return point[0] >= Math.min(a[0], b[0]) - 1e-12 && point[0] <= Math.max(a[0], b[0]) + 1e-12 && point[1] >= Math.min(a[1], b[1]) - 1e-12 && point[1] <= Math.max(a[1], b[1]) + 1e-12;
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}
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function compileLaneCenterlines(model, diagnostics) {
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const features = [];
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const byRoadId = new Map();
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for (const road of model.roads) {
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const lanes = [];
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const laneWidth = road.widthMeters / road.laneCount;
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const siblings = model.roads.filter((item) => item.osmWayIds.join(",") === road.osmWayIds.join(","));
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const opposite = siblings.find((item) => item.id !== road.id);
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// OSM centerline is the shared carriageway center. On a two-way road,
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// offset each directed carriageway to its own side before placing lanes.
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const carriagewayOffset = opposite ? (road.direction === "forward" ? -opposite.widthMeters / 2 : -road.widthMeters / 2) : 0;
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for (let index = 0; index < road.laneCount; index += 1) {
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// OSM `turn:lanes` is ordered from left to right. Keep lane 1 on the
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// driver's left so tag positions and generated lane IDs have one meaning.
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const offset = carriagewayOffset + (road.widthMeters / 2 - laneWidth * (index + 0.5));
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const coordinates = offsetLine(road.centerline, offset);
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if (!coordinates) { diagnostics.push(diagnostic("error", road.id, road.osmWayIds, "invalid-lane-centerline", "无法为该道路生成车道中心线。", road.centerline[0])); continue; }
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const lane = { id: `lane:${road.id}:${index + 1}`, roadId: road.id, index: index + 1, coordinates };
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lanes.push(lane);
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features.push({ type: "Feature", properties: { native_id: lane.id, road_id: road.id, lane_index: lane.index, source: "native-road-lane-centerline/v1" }, geometry: { type: "LineString", coordinates } });
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}
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byRoadId.set(road.id, lanes);
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}
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return { features, byRoadId };
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}
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function compileConnectors(model, lanes, diagnostics, overrides) {
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const features = [];
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for (const connection of model.connections.filter((item) => item.enabled)) {
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const fromRoad = model.roads.find((road) => road.id === endpointRoadId(model, connection.fromEndpointId));
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const toRoad = model.roads.find((road) => road.id === endpointRoadId(model, connection.toEndpointId));
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const fromLanes = lanes.byRoadId.get(fromRoad?.id) || [];
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const toLanes = lanes.byRoadId.get(endpointRoadId(model, connection.toEndpointId)) || [];
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if (!fromLanes.length || !toLanes.length) { diagnostics.push(diagnostic("warning", connection.id, [connection.nodeId], "connector-missing-lane", "转向连接缺少可用车道中心线。", endpointCoordinate(model, connection.fromEndpointId))); continue; }
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for (let index = 0; index < fromLanes.length; index += 1) {
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const turn = connectionTurn(fromRoad, toRoad);
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const defaultTargetIndex = targetLaneIndex(turn, index, fromLanes.length, toLanes.length);
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const defaultFromLane = fromLanes[index]; const defaultToLane = toLanes[defaultTargetIndex];
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const override = laneOverride(overrides, defaultFromLane.id, defaultToLane.id);
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if ((!laneAllowsTurn(fromRoad, index, turn) && override?.enabled !== true) || override?.enabled === false) continue;
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const targetIndex = defaultTargetIndex;
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const from = defaultFromLane.coordinates.at(-1); const to = defaultToLane.coordinates[0];
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const control = connectorControlPoint(model, connection, from, to);
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const coordinates = quadraticCurve(from, control, to, 12);
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const length = lineLengthMeters(coordinates);
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if (length < 0.4) continue;
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if (length > 80) { diagnostics.push(diagnostic("warning", connection.id, [connection.nodeId], "connector-too-long", "转向路径超过 80 米，已跳过；请检查路口拓扑或人工连接。", from)); continue; }
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features.push({ type: "Feature", properties: { native_id: `connector:${connection.id}:${defaultFromLane.id}->${defaultToLane.id}`, connection_id: connection.id, node_id: connection.nodeId, from_lane_id: defaultFromLane.id, to_lane_id: defaultToLane.id, turn, provenance: override ? `override:${override.id}` : connection.provenance }, geometry: { type: "LineString", coordinates } });
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}
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}
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return features;
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}
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function laneOverride(overrides, fromLaneId, toLaneId) { return overrides.overrides.find((item) => item.kind === "lane-connection" && item.fromLaneId === fromLaneId && item.toLaneId === toLaneId); }
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function endpointRoadId(model, endpointId) { return model.endpoints.find((endpoint) => endpoint.id === endpointId)?.roadId; }
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function endpointCoordinate(model, endpointId) { return model.endpoints.find((endpoint) => endpoint.id === endpointId)?.coordinate; }
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function connectionTurn(fromRoad, toRoad) {
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if (!fromRoad || !toRoad) return "unknown";
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const incoming = headingDegrees(fromRoad.centerline.at(-2), fromRoad.centerline.at(-1));
|
|
const outgoing = headingDegrees(toRoad.centerline[0], toRoad.centerline[1]);
|
|
const delta = ((outgoing - incoming + 540) % 360) - 180;
|
|
if (Math.abs(delta) >= 150) return "uturn";
|
|
if (Math.abs(delta) <= 30) return "through";
|
|
return delta > 0 ? "right" : "left";
|
|
}
|
|
function laneAllowsTurn(road, zeroIndex, turn) {
|
|
if (!road) return true;
|
|
const tag = road.tags[`turn:lanes:${road.direction}`] ?? road.tags["turn:lanes"];
|
|
if (!tag) return true;
|
|
const lanes = String(tag).split("|").map((lane) => lane.split(";").map((value) => value.trim().replace("slight_", "")).filter(Boolean));
|
|
const allowed = lanes[zeroIndex];
|
|
return !allowed || allowed.includes(turn) || turn === "uturn" && allowed.includes("reverse");
|
|
}
|
|
function targetLaneIndex(turn, sourceIndex, sourceCount, targetCount) {
|
|
if (turn === "left") return 0;
|
|
if (turn === "right") return targetCount - 1;
|
|
if (turn === "uturn") return 0;
|
|
return Math.min(targetCount - 1, Math.round(sourceIndex / Math.max(1, sourceCount - 1) * Math.max(0, targetCount - 1)));
|
|
}
|
|
function connectorControlPoint(model, connection, from, to) {
|
|
const node = endpointCoordinate(model, connection.fromEndpointId);
|
|
if (!node) return [(from[0] + to[0]) / 2, (from[1] + to[1]) / 2];
|
|
// Nearby manual joins may not share exactly the same point. The midpoint
|
|
// keeps their curve smooth without rewriting the authoritative OSM geometry.
|
|
return node;
|
|
}
|
|
|
|
function quadraticCurve(a, control, b, segments) {
|
|
const result = [];
|
|
for (let index = 0; index <= segments; index += 1) {
|
|
const t = index / segments; const u = 1 - t;
|
|
result.push([u * u * a[0] + 2 * u * t * control[0] + t * t * b[0], u * u * a[1] + 2 * u * t * control[1] + t * t * b[1]]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function offsetLine(line, offsetMeters) {
|
|
if (line.length < 2) return null;
|
|
const origin = line[0]; const points = line.map((point) => project(point, origin)); const result = [];
|
|
for (let index = 0; index < points.length; index += 1) {
|
|
const previous = points[Math.max(0, index - 1)]; const next = points[Math.min(points.length - 1, index + 1)];
|
|
const dx = next[0] - previous[0]; const dy = next[1] - previous[1]; const length = Math.hypot(dx, dy);
|
|
if (length < 0.01) return null;
|
|
result.push(unproject([points[index][0] - dy / length * offsetMeters, points[index][1] + dx / length * offsetMeters], origin));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function lineLengthMeters(line) { return line.slice(1).reduce((sum, point, index) => { const previous = line[index]; const dx = (point[0] - previous[0]) * 111320 * Math.cos(point[1] * Math.PI / 180); const dy = (point[1] - previous[1]) * 111320; return sum + Math.hypot(dx, dy); }, 0); }
|
|
|
|
function compileJunctionSurfaces(model, lanes, connectors, diagnostics) {
|
|
const byNode = new Map();
|
|
for (const endpoint of model.endpoints) {
|
|
if (!byNode.has(endpoint.nodeId)) byNode.set(endpoint.nodeId, []);
|
|
byNode.get(endpoint.nodeId).push(endpoint);
|
|
}
|
|
const result = [];
|
|
for (const [nodeId, endpoints] of byNode) {
|
|
const wayIds = new Set(endpoints.map((endpoint) => endpoint.roadId.split(":")[1]));
|
|
if (wayIds.size < 3 || wayIds.size > 4) continue;
|
|
const node = endpoints[0].coordinate;
|
|
const roads = endpoints.map((endpoint) => model.roads.find((road) => road.id === endpoint.roadId));
|
|
const cutbackMeters = Math.max(...roads.map((road) => road.widthMeters)) * 1.4;
|
|
const boundary = junctionBoundary(model, endpoints, node, cutbackMeters);
|
|
const junctionConnectors = connectors.filter((feature) => feature.properties.node_id === nodeId);
|
|
if (boundary.length < 3 || !junctionConnectors.length) {
|
|
diagnostics.push(diagnostic("warning", `junction:node/${nodeId}`, [nodeId], "junction-surface-deferred", "路口缺少足够的截面或转向路径，暂不生成路口面。", node));
|
|
continue;
|
|
}
|
|
const envelope = convexHull([...boundary, ...junctionConnectors.flatMap((feature) => feature.geometry.coordinates)]);
|
|
const ring = [...envelope, envelope[0]];
|
|
if (hasSelfIntersection(ring)) {
|
|
diagnostics.push(diagnostic("error", `junction:node/${nodeId}`, [nodeId], "invalid-junction-surface", "路口截面边界发生自相交，未发布路口面。请检查道路方向或路口拓扑。", node));
|
|
continue;
|
|
}
|
|
result.push({ type: "Feature", properties: { native_id: `junction:node/${nodeId}`, osm_node_id: nodeId, kind: wayIds.size === 3 ? "t" : "cross", source_road_ids: [...new Set(roads.map((road) => road.id))].join(","), cutback_m: cutbackMeters, connector_count: junctionConnectors.length, rule: "junction-cutback-envelope/v1" }, geometry: { type: "Polygon", coordinates: [ring] } });
|
|
diagnostics.push(diagnostic("info", `junction:node/${nodeId}`, [nodeId], "ordinary-junction-surface", "已按道路截面与转向路径生成普通路口面。", node));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function junctionBoundary(model, endpoints, node, cutbackMeters) {
|
|
const points = [];
|
|
for (const endpoint of endpoints) {
|
|
const road = model.roads.find((item) => item.id === endpoint.roadId);
|
|
if (!road) continue;
|
|
const line = endpoint.side === "end" ? [...road.centerline].reverse() : road.centerline;
|
|
const cutback = pointAlongLine(line, cutbackMeters);
|
|
if (!cutback) continue;
|
|
const heading = headingAtEndpoint(line);
|
|
const half = road.widthMeters / 2;
|
|
points.push(offsetCoordinate(cutback, heading + 90, half));
|
|
points.push(offsetCoordinate(cutback, heading - 90, half));
|
|
}
|
|
return sortAround(node, points);
|
|
}
|
|
|
|
function pointAlongLine(line, meters) {
|
|
let remaining = meters;
|
|
for (let index = 1; index < line.length; index += 1) {
|
|
const length = distanceMeters(line[index - 1], line[index]);
|
|
if (length >= remaining) return interpolate(line[index - 1], line[index], remaining / length);
|
|
remaining -= length;
|
|
}
|
|
return line.at(-1);
|
|
}
|
|
|
|
function headingAtEndpoint(line) { return headingDegrees(line[0], line[1]); }
|
|
function headingDegrees(a, b) { return Math.atan2((b[0] - a[0]) * Math.cos(a[1] * Math.PI / 180), b[1] - a[1]) * 180 / Math.PI; }
|
|
function offsetCoordinate(point, degrees, meters) { const radians = degrees * Math.PI / 180; return [point[0] + Math.sin(radians) * meters / (111320 * Math.cos(point[1] * Math.PI / 180)), point[1] + Math.cos(radians) * meters / 111320]; }
|
|
function sortAround(center, points) { return points.sort((a, b) => Math.atan2(a[1] - center[1], a[0] - center[0]) - Math.atan2(b[1] - center[1], b[0] - center[0])); }
|
|
function convexHull(points) {
|
|
const unique = [...new Map(points.map((point) => [`${point[0]},${point[1]}`, point])).values()].sort((a, b) => a[0] - b[0] || a[1] - b[1]);
|
|
if (unique.length < 3) return unique;
|
|
const cross = (a, b, c) => (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
|
|
const lower = []; for (const point of unique) { while (lower.length >= 2 && cross(lower.at(-2), lower.at(-1), point) <= 0) lower.pop(); lower.push(point); }
|
|
const upper = []; for (const point of [...unique].reverse()) { while (upper.length >= 2 && cross(upper.at(-2), upper.at(-1), point) <= 0) upper.pop(); upper.push(point); }
|
|
return [...lower.slice(0, -1), ...upper.slice(0, -1)];
|
|
}
|
|
function interpolate(a, b, ratio) { return [a[0] + (b[0] - a[0]) * ratio, a[1] + (b[1] - a[1]) * ratio]; }
|
|
function distanceMeters(a, b) { const dx = (b[0] - a[0]) * 111320 * Math.cos(a[1] * Math.PI / 180); const dy = (b[1] - a[1]) * 111320; return Math.hypot(dx, dy); }
|
|
function hasSelfIntersection(ring) {
|
|
for (let first = 0; first < ring.length - 1; first += 1) for (let second = first + 1; second < ring.length - 1; second += 1) {
|
|
if (Math.abs(first - second) <= 1 || first === 0 && second === ring.length - 2) continue;
|
|
if (segmentsIntersect(ring[first], ring[first + 1], ring[second], ring[second + 1])) return true;
|
|
}
|
|
return false;
|
|
}
|
|
function segmentsIntersect(a, b, c, d) {
|
|
const cross = (p, q, r) => (q[0] - p[0]) * (r[1] - p[1]) - (q[1] - p[1]) * (r[0] - p[0]);
|
|
const abC = cross(a, b, c); const abD = cross(a, b, d); const cdA = cross(c, d, a); const cdB = cross(c, d, b);
|
|
return (abC > 0 && abD < 0 || abC < 0 && abD > 0) && (cdA > 0 && cdB < 0 || cdA < 0 && cdB > 0);
|
|
}
|
|
|
|
function circleRing(center, radius, segments) {
|
|
const origin = center;
|
|
const ring = [];
|
|
for (let index = 0; index <= segments; index += 1) {
|
|
const angle = index / segments * Math.PI * 2;
|
|
ring.push(unproject([Math.cos(angle) * radius, Math.sin(angle) * radius], origin));
|
|
}
|
|
return ring;
|
|
}
|
|
|
|
function roadRing(line, width) {
|
|
if (line.length < 2 || !Number.isFinite(width)) return null;
|
|
const origin = line[0];
|
|
const points = line.map((point) => project(point, origin));
|
|
const left = []; const right = [];
|
|
const half = width / 2;
|
|
for (let i = 0; i < points.length; i += 1) {
|
|
const prior = points[Math.max(0, i - 1)]; const next = points[Math.min(points.length - 1, i + 1)];
|
|
const dx = next[0] - prior[0]; const dy = next[1] - prior[1]; const length = Math.hypot(dx, dy);
|
|
if (length < 0.01) return null;
|
|
const nx = -dy / length * half; const ny = dx / length * half;
|
|
left.push(unproject([points[i][0] + nx, points[i][1] + ny], origin));
|
|
right.push(unproject([points[i][0] - nx, points[i][1] - ny], origin));
|
|
}
|
|
const ring = [...left, ...right.reverse(), left[0]];
|
|
return ring.every((point) => point.every(Number.isFinite)) ? ring : null;
|
|
}
|
|
|
|
function project(point, origin) { const scale = 111320; return [(point[0] - origin[0]) * scale * Math.cos(origin[1] * Math.PI / 180), (point[1] - origin[1]) * scale]; }
|
|
function unproject(point, origin) { const scale = 111320; return [point[0] / (scale * Math.cos(origin[1] * Math.PI / 180)) + origin[0], point[1] / scale + origin[1]]; }
|
|
function diagnostic(severity, subjectId, sourceIds, rule, message, coordinate) { return { id: `diagnostic:${rule}:${subjectId}`, severity, subjectId, sourceIds, rule, message, geometry: coordinate ? { type: "Point", coordinates: coordinate } : null }; }
|
|
function xmlAttrs(text) { const attrs = {}; for (const match of text.matchAll(/([:\w-]+)\s*=\s*(?:"([^"]*)"|'([^']*)')/g)) attrs[match[1]] = match[2] ?? match[3]; return attrs; }
|
|
function parseTags(body) { const tags = {}; for (const match of body.matchAll(/<tag\b([^>]*)\/?\s*>/g)) { const attrs = xmlAttrs(match[1]); if (attrs.k) tags[attrs.k] = attrs.v || ""; } return tags; }
|
|
function positiveInteger(value) { const number = Number(value); return Number.isInteger(number) && number > 0 ? number : null; }
|
|
function positiveNumber(value) { const match = String(value ?? "").match(/^\s*(\d+(?:\.\d+)?)/); const number = match ? Number(match[1]) : null; return Number.isFinite(number) && number > 0 ? number : null; }
|
|
function writeJsonAtomic(file, data) { fs.mkdirSync(path.dirname(file), { recursive: true }); const temporary = `${file}.${process.pid}.tmp`; fs.writeFileSync(temporary, `${JSON.stringify(data, null, 2)}\n`); fs.renameSync(temporary, file); }
|
|
|
|
module.exports = { OVERRIDE_SCHEMA, compileRoadModel, compileGeometry, loadOverrides, validateOverrides, writeJsonAtomic };
|