743 lines
25 KiB
JavaScript
Executable File
743 lines
25 KiB
JavaScript
Executable File
#!/usr/bin/env node
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const fs = require("fs");
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const path = require("path");
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const { spawnSync } = require("child_process");
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const repoRoot = path.resolve(__dirname, "..");
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const args = parseArgs(process.argv.slice(2));
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const configPath = path.resolve(
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args.config || path.join(repoRoot, "config", "areas", "nantaizi-lake-innovation-valley.json"),
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);
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const area = normalizeAreaConfig(readJson(configPath));
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const requestedStages = args.stages
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? splitList(args.stages)
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: null;
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const stages = resolveStages(area.stages, requestedStages);
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console.log(`Area: ${area.id}`);
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console.log(`Config: ${configPath}`);
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console.log(`Output: ${area.outputs.areaDir}`);
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if (stages.intermediates) {
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buildIntermediates(area);
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}
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if (stages.blender) {
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buildBlenderScene(area);
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}
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if (stages.cesium) {
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exportCesium(area);
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}
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if (stages.preview) {
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writeCesiumPreview(area);
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}
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console.log("Done.");
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function parseArgs(argv) {
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const out = {};
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for (let i = 0; i < argv.length; i += 1) {
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const arg = argv[i];
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if (!arg.startsWith("--")) continue;
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const key = arg.slice(2).replace(/-([a-z])/g, (_, c) => c.toUpperCase());
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const next = argv[i + 1];
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if (!next || next.startsWith("--")) {
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out[key] = "true";
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} else {
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out[key] = next;
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i += 1;
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}
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}
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return out;
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}
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function readJson(file) {
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if (!fs.existsSync(file)) {
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throw new Error(`Config file not found: ${file}`);
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}
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return JSON.parse(fs.readFileSync(file, "utf8"));
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}
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function normalizeAreaConfig(raw) {
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const id = requireText(raw.id, "id");
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const input = path.resolve(requireText(raw.input, "input"));
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if (!fs.existsSync(input)) {
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throw new Error(`Input OSM XML not found: ${input}`);
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}
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const outputRoot = path.resolve(raw.outputRoot || path.join(repoRoot, "outputs"));
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const outputOverrides = raw.outputs || {};
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const areaDir = path.resolve(outputOverrides.areaDir || path.join(outputRoot, id));
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const fileStem = outputOverrides.fileStem || id;
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const outputs = {
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areaDir,
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geojsonDir: path.resolve(outputOverrides.geojsonDir || path.join(areaDir, "osm2streets_web_out")),
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gpkg: path.resolve(outputOverrides.gpkg || path.join(areaDir, `${fileStem}.gpkg`)),
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qgisProject: path.resolve(outputOverrides.qgisProject || path.join(areaDir, `${fileStem}.qgz`)),
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qgisPreview: path.resolve(outputOverrides.qgisPreview || path.join(areaDir, `${fileStem}-preview.png`)),
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blend: path.resolve(outputOverrides.blend || path.join(areaDir, `${fileStem}.blend`)),
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render: path.resolve(outputOverrides.render || path.join(areaDir, `${fileStem}.png`)),
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glb: path.resolve(outputOverrides.glb || path.join(areaDir, `${fileStem}.glb`)),
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metadata: path.resolve(outputOverrides.metadata || path.join(areaDir, `${fileStem}.json`)),
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cesiumPreview: path.resolve(
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outputOverrides.cesiumPreview || path.join(areaDir, `${fileStem}-cesium-preview.html`),
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),
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vehicleRoute: path.resolve(outputOverrides.vehicleRoute || path.join(areaDir, `${fileStem}-vehicle-route.json`)),
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pipelineDir: path.resolve(outputOverrides.pipelineDir || path.join(areaDir, "_pipeline")),
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};
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return {
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id,
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input,
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outputRoot,
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qgisApp: raw.qgisApp || "/Applications/QGIS.app",
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blenderApp: raw.blenderApp || "/Applications/Blender.app",
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stages: {
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intermediates: raw.stages?.intermediates ?? raw.stages?.qgis ?? true,
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blender: raw.stages?.blender ?? true,
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cesium: raw.stages?.cesium ?? true,
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preview: false,
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},
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qgis: {
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arrowScale: raw.qgis?.arrowScale ?? raw.arrowScale ?? 0.8,
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clipPad: raw.qgis?.clipPad ?? raw.clipPad ?? 0.002,
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canvasPad: raw.qgis?.canvasPad ?? raw.canvasPad ?? 0.001,
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previewPad: raw.qgis?.previewPad ?? raw.previewPad ?? 0.0007,
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canvasExtent: raw.qgis?.canvasExtent ?? raw.canvasExtent ?? null,
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previewExtent: raw.qgis?.previewExtent ?? raw.previewExtent ?? null,
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layerPrefix: raw.qgis?.layerPrefix ?? raw.layerPrefix ?? "osm2streets",
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},
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osm2streets: raw.osm2streets || {
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debug_each_step: false,
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dual_carriageway_experiment: false,
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sidepath_zipping_experiment: false,
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inferred_sidewalks: true,
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osm2lanes: true,
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},
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blender: {
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treeStyle: raw.blender?.treeStyle || "natural",
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officeOverrides: raw.blender?.officeOverrides || raw.blender?.office_overrides || "",
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},
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outputs,
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};
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}
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function requireText(value, key) {
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if (typeof value !== "string" || value.trim() === "") {
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throw new Error(`Missing config key: ${key}`);
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}
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return value;
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}
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function splitList(value) {
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return String(value)
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.split(",")
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.map((item) => item.trim())
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.filter(Boolean);
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}
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function resolveStages(defaults, requested) {
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if (!requested) return defaults;
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const aliases = {
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all: ["intermediates", "blender", "cesium"],
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qgis: ["intermediates"],
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osm2streets: ["intermediates"],
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geojson: ["intermediates"],
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intermediate: ["intermediates"],
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intermediates: ["intermediates"],
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blender: ["blender"],
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scene: ["blender"],
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cesium: ["cesium"],
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glb: ["cesium"],
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preview: ["preview"],
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html: ["preview"],
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cesiumPreview: ["preview"],
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};
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const out = { intermediates: false, blender: false, cesium: false, preview: false };
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for (const stage of requested) {
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const mapped = aliases[stage];
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if (!mapped) {
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throw new Error(`Unknown stage '${stage}'. Use intermediates, blender, cesium, preview, or all.`);
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}
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for (const key of mapped) out[key] = true;
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}
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return out;
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}
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function buildIntermediates(area) {
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fs.mkdirSync(area.outputs.pipelineDir, { recursive: true });
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const derivedConfig = {
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qgisApp: area.qgisApp,
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input: area.input,
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outDir: area.outputs.geojsonDir,
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gpkg: area.outputs.gpkg,
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project: area.outputs.qgisProject,
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preview: area.outputs.qgisPreview,
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arrowScale: area.qgis.arrowScale,
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clipPad: area.qgis.clipPad,
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canvasPad: area.qgis.canvasPad,
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previewPad: area.qgis.previewPad,
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canvasExtent: area.qgis.canvasExtent,
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previewExtent: area.qgis.previewExtent,
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layerPrefix: area.qgis.layerPrefix,
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osm2streets: area.osm2streets,
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};
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const derivedConfigPath = path.join(area.outputs.pipelineDir, "osm2streets-qgis.config.json");
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fs.writeFileSync(derivedConfigPath, `${JSON.stringify(derivedConfig, null, 2)}\n`);
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console.log("Stage: intermediates (osm2streets GeoJSON + QGIS)");
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runCommand(process.execPath, [
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path.join(repoRoot, "scripts", "build-osm2streets-qgis.js"),
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"--config",
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derivedConfigPath,
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], "intermediates");
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}
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function buildBlenderScene(area) {
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ensureFile(blenderExecutable(area), "Blender executable");
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ensureFile(path.join(repoRoot, "blender", "generate_scene.py"), "Blender scene generator");
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fs.mkdirSync(path.dirname(area.outputs.blend), { recursive: true });
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fs.mkdirSync(path.dirname(area.outputs.render), { recursive: true });
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const blenderArgs = [
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"--background",
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"--factory-startup",
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"--python",
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path.join(repoRoot, "blender", "generate_scene.py"),
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"--",
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"--osm",
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area.input,
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"--geojson",
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area.outputs.geojsonDir,
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"--output",
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area.outputs.blend,
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"--render",
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area.outputs.render,
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"--tree-style",
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area.blender.treeStyle,
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];
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if (area.blender.officeOverrides) {
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blenderArgs.push("--office-overrides", area.blender.officeOverrides);
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}
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console.log("Stage: blender");
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runCommand(blenderExecutable(area), blenderArgs, "blender");
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}
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function exportCesium(area) {
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ensureFile(blenderExecutable(area), "Blender executable");
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ensureFile(area.outputs.blend, "Blend scene");
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ensureFile(path.join(repoRoot, "blender", "export_cesium.py"), "Cesium exporter");
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fs.mkdirSync(path.dirname(area.outputs.glb), { recursive: true });
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fs.mkdirSync(path.dirname(area.outputs.metadata), { recursive: true });
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console.log("Stage: cesium");
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runCommand(blenderExecutable(area), [
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"--background",
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"--python",
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path.join(repoRoot, "blender", "export_cesium.py"),
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"--",
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"--blend",
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area.outputs.blend,
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"--glb",
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area.outputs.glb,
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"--metadata",
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area.outputs.metadata,
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], "cesium");
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writeCesiumPreview(area);
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}
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function blenderExecutable(area) {
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return path.join(area.blenderApp, "Contents", "MacOS", "Blender");
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}
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function ensureFile(file, label) {
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if (!fs.existsSync(file)) {
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throw new Error(`${label} not found: ${file}`);
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}
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}
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function runCommand(command, commandArgs, stage) {
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const result = spawnSync(command, commandArgs, { stdio: "inherit" });
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if (result.error) {
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throw result.error;
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}
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if (result.status !== 0) {
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const signal = result.signal ? ` signal=${result.signal}` : "";
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throw new Error(`Stage '${stage}' failed with status=${result.status}${signal}`);
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}
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}
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function writeCesiumPreview(area) {
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ensureFile(area.outputs.glb, "Cesium GLB");
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ensureFile(area.outputs.metadata, "Cesium metadata");
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const htmlPath = area.outputs.cesiumPreview;
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fs.mkdirSync(path.dirname(htmlPath), { recursive: true });
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writeVehicleRoute(area);
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const glbName = path.basename(area.outputs.glb);
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const metadataName = path.basename(area.outputs.metadata);
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const routeName = path.basename(area.outputs.vehicleRoute);
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fs.writeFileSync(htmlPath, cesiumPreviewHtml(glbName, metadataName, routeName, area.id));
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console.log(`Cesium preview: ${htmlPath}`);
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}
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function writeVehicleRoute(area) {
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const route = buildVehicleRoute(area.input);
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fs.mkdirSync(path.dirname(area.outputs.vehicleRoute), { recursive: true });
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fs.writeFileSync(area.outputs.vehicleRoute, `${JSON.stringify(route, null, 2)}\n`);
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console.log(`Vehicle route: ${area.outputs.vehicleRoute}`);
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}
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function buildVehicleRoute(osmPath) {
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const xml = fs.readFileSync(osmPath, "utf8");
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const bounds = osmBounds(xml);
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const nodes = new Map();
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for (const match of xml.matchAll(/<node\b([^>]*)>/g)) {
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const attrs = xmlAttrs(match[1]);
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if (!attrs.id || attrs.lon === undefined || attrs.lat === undefined) continue;
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nodes.set(attrs.id, [Number(attrs.lon), Number(attrs.lat)]);
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}
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const segments = [];
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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 = {};
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for (const tagMatch of body.matchAll(/<tag\b([^>]*)\/?>/g)) {
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const tag = xmlAttrs(tagMatch[1]);
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if (tag.k) tags[tag.k] = tag.v || "";
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}
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if (!isCruiseHighway(tags)) continue;
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const coords = [];
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for (const ndMatch of body.matchAll(/<nd\b([^>]*)\/?>/g)) {
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const nd = xmlAttrs(ndMatch[1]);
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const coord = nodes.get(nd.ref);
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if (coord) coords.push(coord);
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}
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const runs = splitInBounds(compactCoords(coords), bounds);
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let runIndex = 0;
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for (const run of runs) {
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const lengthMeters = routeLength(run);
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if (lengthMeters < 20) continue;
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runIndex += 1;
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segments.push({
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id: runIndex === 1 ? (attrs.id || `way-${segments.length + 1}`) : `${attrs.id || "way"}-${runIndex}`,
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name: tags.name || tags.highway || "road",
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highway: tags.highway || "",
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oneWay: tags.oneway || "",
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lengthMeters,
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coordinates: run,
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});
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}
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}
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segments.sort((a, b) => b.lengthMeters - a.lengthMeters);
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return {
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source: osmPath,
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bounds,
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generatedAt: new Date().toISOString(),
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speedMetersPerSecond: 8.0,
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loop: true,
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segments,
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};
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}
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function osmBounds(xml) {
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const match = xml.match(/<bounds\b([^>]*)\/?>/);
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if (!match) return null;
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const attrs = xmlAttrs(match[1]);
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const bounds = {
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minLon: Number(attrs.minlon),
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minLat: Number(attrs.minlat),
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maxLon: Number(attrs.maxlon),
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maxLat: Number(attrs.maxlat),
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};
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return Object.values(bounds).every(Number.isFinite) ? bounds : null;
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}
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function xmlAttrs(text) {
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const attrs = {};
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for (const match of text.matchAll(/([:\w-]+)\s*=\s*("([^"]*)"|'([^']*)')/g)) {
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attrs[match[1]] = match[3] !== undefined ? match[3] : match[4];
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}
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return attrs;
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}
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function isCruiseHighway(tags) {
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const highway = tags.highway || "";
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if (!highway) return false;
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if (tags.area === "yes") return false;
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const blocked = new Set([
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"footway", "path", "pedestrian", "steps", "cycleway", "service", "track",
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"bridleway", "corridor", "elevator", "platform", "construction",
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]);
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return !blocked.has(highway);
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}
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function compactCoords(coords) {
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const out = [];
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for (const coord of coords) {
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const last = out[out.length - 1];
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if (!last || last[0] !== coord[0] || last[1] !== coord[1]) {
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out.push(coord);
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}
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}
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return out;
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}
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function splitInBounds(coords, bounds) {
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if (!bounds) return [coords];
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const runs = [];
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let current = [];
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for (const coord of coords) {
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if (insideBounds(coord, bounds)) {
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current.push(coord);
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} else if (current.length) {
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if (current.length >= 2) runs.push(current);
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current = [];
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}
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}
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if (current.length >= 2) runs.push(current);
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return runs;
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}
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function insideBounds(coord, bounds) {
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const pad = 0.00002;
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return (
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coord[0] >= bounds.minLon - pad &&
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coord[0] <= bounds.maxLon + pad &&
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coord[1] >= bounds.minLat - pad &&
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coord[1] <= bounds.maxLat + pad
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);
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}
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function routeLength(coords) {
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let total = 0;
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for (let i = 1; i < coords.length; i += 1) {
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total += haversineMeters(coords[i - 1], coords[i]);
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}
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return total;
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}
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function haversineMeters(a, b) {
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const radius = 6371008.8;
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const lat1 = degreesToRadians(a[1]);
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const lat2 = degreesToRadians(b[1]);
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const dLat = degreesToRadians(b[1] - a[1]);
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const dLon = degreesToRadians(b[0] - a[0]);
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const sinLat = Math.sin(dLat / 2);
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const sinLon = Math.sin(dLon / 2);
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const h = sinLat * sinLat + Math.cos(lat1) * Math.cos(lat2) * sinLon * sinLon;
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return 2 * radius * Math.asin(Math.min(1, Math.sqrt(h)));
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}
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function degreesToRadians(value) {
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return value * Math.PI / 180;
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}
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function cesiumPreviewHtml(glbName, metadataName, routeName, areaId) {
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return `<!doctype html>
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<html lang="zh-CN">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>${escapeHtml(areaId)} Cesium Preview</title>
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<script src="https://cdn.jsdelivr.net/npm/cesium@1.121.1/Build/Cesium/Cesium.js"></script>
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<link href="https://cdn.jsdelivr.net/npm/cesium@1.121.1/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
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<style>
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html, body, #cesiumContainer {
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width: 100%;
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height: 100%;
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margin: 0;
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overflow: hidden;
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
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}
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#status {
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position: absolute;
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left: 12px;
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bottom: 12px;
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z-index: 1;
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max-width: 520px;
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padding: 8px 10px;
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border-radius: 4px;
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background: rgba(20, 24, 28, 0.78);
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color: #fff;
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font-size: 12px;
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line-height: 1.45;
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}
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#controls {
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position: absolute;
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top: 12px;
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left: 12px;
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z-index: 1;
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display: flex;
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gap: 8px;
|
|
align-items: center;
|
|
padding: 8px;
|
|
border-radius: 4px;
|
|
background: rgba(20, 24, 28, 0.78);
|
|
color: #fff;
|
|
font-size: 12px;
|
|
}
|
|
#controls button {
|
|
height: 28px;
|
|
border: 0;
|
|
border-radius: 4px;
|
|
padding: 0 10px;
|
|
background: #f2f5f7;
|
|
color: #111;
|
|
cursor: pointer;
|
|
}
|
|
#controls input {
|
|
width: 120px;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<div id="cesiumContainer"></div>
|
|
<div id="controls">
|
|
<button id="toggleCruise">Pause</button>
|
|
<button id="toggleFollow">Follow</button>
|
|
<label>Speed <input id="speedControl" type="range" min="2" max="22" step="1" value="8"></label>
|
|
<span id="speedLabel">8 m/s</span>
|
|
</div>
|
|
<div id="status">Loading ${escapeHtml(glbName)}...</div>
|
|
<script>
|
|
const statusEl = document.getElementById("status");
|
|
const toggleCruise = document.getElementById("toggleCruise");
|
|
const toggleFollow = document.getElementById("toggleFollow");
|
|
const speedControl = document.getElementById("speedControl");
|
|
const speedLabel = document.getElementById("speedLabel");
|
|
Cesium.Ion.defaultAccessToken = "";
|
|
|
|
async function main() {
|
|
const metadata = await fetch("${escapeJs(metadataName)}").then((r) => r.json());
|
|
const routeData = await fetch("${escapeJs(routeName)}").then((r) => r.json());
|
|
const anchor = metadata.anchor || {};
|
|
const longitude = Number(anchor.longitude || 0);
|
|
const latitude = Number(anchor.latitude || 0);
|
|
const height = Number(anchor.height || 0);
|
|
const heading = Number(metadata.heading_correction_degrees || 0);
|
|
|
|
const viewer = new Cesium.Viewer("cesiumContainer", {
|
|
animation: false,
|
|
timeline: false,
|
|
baseLayerPicker: false,
|
|
geocoder: false,
|
|
navigationHelpButton: false,
|
|
sceneModePicker: false,
|
|
homeButton: true,
|
|
fullscreenButton: true,
|
|
infoBox: false,
|
|
selectionIndicator: false,
|
|
baseLayer: false
|
|
});
|
|
viewer.scene.globe.depthTestAgainstTerrain = true;
|
|
|
|
const p = Cesium.Cartesian3.fromDegrees(longitude, latitude, height);
|
|
const enu = Cesium.Transforms.eastNorthUpToFixedFrame(p);
|
|
const correction = Cesium.Matrix3.fromRotationZ(Cesium.Math.toRadians(heading));
|
|
const modelMatrix = Cesium.Matrix4.multiplyByMatrix3(enu, correction, new Cesium.Matrix4());
|
|
const model = await Cesium.Model.fromGltfAsync({
|
|
url: "${escapeJs(glbName)}",
|
|
modelMatrix,
|
|
scale: 1.0
|
|
});
|
|
viewer.scene.primitives.add(model);
|
|
const cruise = addVehicleCruise(viewer, routeData);
|
|
|
|
const center = Cesium.Cartesian3.fromDegrees(longitude, latitude, height);
|
|
viewer.camera.flyToBoundingSphere(
|
|
new Cesium.BoundingSphere(center, 900.0),
|
|
{ duration: 0.0 }
|
|
);
|
|
statusEl.textContent = "${escapeJs(glbName)} | route " + cruise.segment.id + " | " + Math.round(cruise.segment.lengthMeters) + "m";
|
|
}
|
|
|
|
function addVehicleCruise(viewer, routeData) {
|
|
const segment = (routeData.segments || [])[0];
|
|
if (!segment || !segment.coordinates || segment.coordinates.length < 2) {
|
|
throw new Error("No drivable route found in ${escapeJs(routeName)}");
|
|
}
|
|
const speed = Number(routeData.speedMetersPerSecond || 8);
|
|
const start = Cesium.JulianDate.now();
|
|
const duration = Math.max(8, segment.lengthMeters / speed);
|
|
const stop = Cesium.JulianDate.addSeconds(start, duration, new Cesium.JulianDate());
|
|
const positions = new Cesium.SampledPositionProperty();
|
|
let elapsed = 0;
|
|
let previous = segment.coordinates[0];
|
|
positions.addSample(start, Cesium.Cartesian3.fromDegrees(previous[0], previous[1], 1.15));
|
|
for (let i = 1; i < segment.coordinates.length; i += 1) {
|
|
const coord = segment.coordinates[i];
|
|
elapsed += distanceMeters(previous, coord) / speed;
|
|
const time = Cesium.JulianDate.addSeconds(start, elapsed, new Cesium.JulianDate());
|
|
positions.addSample(time, Cesium.Cartesian3.fromDegrees(coord[0], coord[1], 1.15));
|
|
previous = coord;
|
|
}
|
|
positions.setInterpolationOptions({
|
|
interpolationDegree: 1,
|
|
interpolationAlgorithm: Cesium.LinearApproximation
|
|
});
|
|
|
|
viewer.clock.startTime = start.clone();
|
|
viewer.clock.stopTime = stop.clone();
|
|
viewer.clock.currentTime = start.clone();
|
|
viewer.clock.clockRange = Cesium.ClockRange.LOOP_STOP;
|
|
viewer.clock.multiplier = 1;
|
|
viewer.clock.shouldAnimate = true;
|
|
|
|
const flat = [];
|
|
for (const coord of segment.coordinates) {
|
|
flat.push(coord[0], coord[1], 1.05);
|
|
}
|
|
viewer.entities.add({
|
|
name: "Cruise route",
|
|
polyline: {
|
|
positions: Cesium.Cartesian3.fromDegreesArrayHeights(flat),
|
|
width: 4,
|
|
material: Cesium.Color.CYAN.withAlpha(0.85),
|
|
clampToGround: false
|
|
}
|
|
});
|
|
const vehicle = viewer.entities.add({
|
|
name: "Cruise vehicle",
|
|
availability: new Cesium.TimeIntervalCollection([
|
|
new Cesium.TimeInterval({ start, stop })
|
|
]),
|
|
position: positions,
|
|
orientation: new Cesium.VelocityOrientationProperty(positions),
|
|
box: {
|
|
dimensions: new Cesium.Cartesian3(4.6, 1.9, 1.5),
|
|
material: Cesium.Color.ORANGERED,
|
|
outline: true,
|
|
outlineColor: Cesium.Color.WHITE
|
|
},
|
|
path: {
|
|
resolution: 1,
|
|
leadTime: 4,
|
|
trailTime: 10,
|
|
width: 2,
|
|
material: Cesium.Color.ORANGE.withAlpha(0.9)
|
|
}
|
|
});
|
|
toggleCruise.addEventListener("click", () => {
|
|
viewer.clock.shouldAnimate = !viewer.clock.shouldAnimate;
|
|
toggleCruise.textContent = viewer.clock.shouldAnimate ? "Pause" : "Play";
|
|
});
|
|
speedControl.addEventListener("input", () => {
|
|
const value = Number(speedControl.value);
|
|
viewer.clock.multiplier = value / speed;
|
|
speedLabel.textContent = value + " m/s";
|
|
});
|
|
const follow = createChaseFollow(viewer, positions);
|
|
toggleFollow.addEventListener("click", () => {
|
|
if (follow.enabled) {
|
|
follow.stop();
|
|
toggleFollow.textContent = "Follow";
|
|
} else {
|
|
follow.start();
|
|
toggleFollow.textContent = "Free";
|
|
}
|
|
});
|
|
return { segment, vehicle };
|
|
}
|
|
|
|
function createChaseFollow(viewer, positions) {
|
|
const scratchPosition = new Cesium.Cartesian3();
|
|
const scratchPrevious = new Cesium.Cartesian3();
|
|
const scratchDirection = new Cesium.Cartesian3();
|
|
const scratchEast = new Cesium.Cartesian3();
|
|
const scratchNorth = new Cesium.Cartesian3();
|
|
const scratchUp = new Cesium.Cartesian3();
|
|
const offset = new Cesium.Cartesian3();
|
|
const state = { enabled: false };
|
|
|
|
function update(clock) {
|
|
const time = clock.currentTime;
|
|
const position = positions.getValue(time, scratchPosition);
|
|
if (!position) return;
|
|
const previousTime = Cesium.JulianDate.addSeconds(time, -0.8, new Cesium.JulianDate());
|
|
const previous = positions.getValue(previousTime, scratchPrevious);
|
|
if (previous) {
|
|
Cesium.Cartesian3.subtract(position, previous, scratchDirection);
|
|
} else {
|
|
Cesium.Cartesian3.clone(Cesium.Cartesian3.UNIT_X, scratchDirection);
|
|
}
|
|
if (Cesium.Cartesian3.magnitudeSquared(scratchDirection) < 0.0001) {
|
|
Cesium.Cartesian3.clone(Cesium.Cartesian3.UNIT_X, scratchDirection);
|
|
}
|
|
Cesium.Cartesian3.normalize(scratchDirection, scratchDirection);
|
|
Cesium.Cartesian3.normalize(position, scratchUp);
|
|
Cesium.Cartesian3.cross(Cesium.Cartesian3.UNIT_Z, scratchUp, scratchEast);
|
|
if (Cesium.Cartesian3.magnitudeSquared(scratchEast) < 0.0001) {
|
|
Cesium.Cartesian3.clone(Cesium.Cartesian3.UNIT_X, scratchEast);
|
|
} else {
|
|
Cesium.Cartesian3.normalize(scratchEast, scratchEast);
|
|
}
|
|
Cesium.Cartesian3.cross(scratchUp, scratchEast, scratchNorth);
|
|
Cesium.Cartesian3.normalize(scratchNorth, scratchNorth);
|
|
|
|
const eastComponent = Cesium.Cartesian3.dot(scratchDirection, scratchEast);
|
|
const northComponent = Cesium.Cartesian3.dot(scratchDirection, scratchNorth);
|
|
const heading = Math.atan2(eastComponent, northComponent);
|
|
Cesium.Cartesian3.fromElements(0.0, -36.0, 18.0, offset);
|
|
const transform = Cesium.Transforms.headingPitchRollToFixedFrame(
|
|
position,
|
|
new Cesium.HeadingPitchRoll(heading, 0.0, 0.0)
|
|
);
|
|
viewer.camera.lookAtTransform(transform, offset);
|
|
}
|
|
|
|
return {
|
|
get enabled() {
|
|
return state.enabled;
|
|
},
|
|
start() {
|
|
if (state.enabled) return;
|
|
state.enabled = true;
|
|
viewer.trackedEntity = undefined;
|
|
viewer.clock.onTick.addEventListener(update);
|
|
update(viewer.clock);
|
|
},
|
|
stop() {
|
|
if (!state.enabled) return;
|
|
state.enabled = false;
|
|
viewer.clock.onTick.removeEventListener(update);
|
|
viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
|
|
}
|
|
};
|
|
}
|
|
|
|
function distanceMeters(a, b) {
|
|
const radius = 6371008.8;
|
|
const lat1 = Cesium.Math.toRadians(a[1]);
|
|
const lat2 = Cesium.Math.toRadians(b[1]);
|
|
const dLat = Cesium.Math.toRadians(b[1] - a[1]);
|
|
const dLon = Cesium.Math.toRadians(b[0] - a[0]);
|
|
const sinLat = Math.sin(dLat / 2);
|
|
const sinLon = Math.sin(dLon / 2);
|
|
const h = sinLat * sinLat + Math.cos(lat1) * Math.cos(lat2) * sinLon * sinLon;
|
|
return 2 * radius * Math.asin(Math.min(1, Math.sqrt(h)));
|
|
}
|
|
|
|
main().catch((error) => {
|
|
console.error(error);
|
|
statusEl.textContent = "Failed to load Cesium preview: " + error.message;
|
|
});
|
|
</script>
|
|
</body>
|
|
</html>
|
|
`;
|
|
}
|
|
|
|
function escapeHtml(value) {
|
|
return String(value)
|
|
.replaceAll("&", "&")
|
|
.replaceAll("<", "<")
|
|
.replaceAll(">", ">")
|
|
.replaceAll('"', """);
|
|
}
|
|
|
|
function escapeJs(value) {
|
|
return String(value).replaceAll("\\", "\\\\").replaceAll('"', '\\"');
|
|
}
|