Begin Refactor + Webapp

.vscode/launch.json

@@ -0,0 +1,20 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Parser Node",
+      "skipFiles": ["<node_internals>/**"],
+      "args": [
+        "--experimental-strip-types",
+        "${workspaceFolder}\\browser\\src\\parser\\node.ts"
+      ],
+      "cwd": "${workspaceFolder}\\browser\\",
+      "outFiles": ["${workspaceFolder}/**/*.js"]
+    }
+  ]
+}

browser/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

browser/README.md

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+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      ...tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      ...tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      ...tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```

browser/eslint.config.js

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+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { globalIgnores } from 'eslint/config'
+
+export default tseslint.config([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs['recommended-latest'],
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])

browser/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>MD-11 NavData Browser</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

browser/package.json

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+{
+  "name": "browser",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview",
+    "parser": "node --experimental-strip-types src/parser/node.ts"
+  },
+  "dependencies": {
+    "geojson": "^0.5.0",
+    "geolib": "^3.3.4",
+    "leaflet": "^1.9.4",
+    "magvar": "^2.0.0",
+    "react": "19.0.0-rc.1",
+    "react-dom": "19.0.0-rc.1",
+    "react-leaflet": "5.0.0-rc.2"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.30.1",
+    "@types/leaflet": "^1.9.20",
+    "@types/object-hash": "^3.0.6",
+    "@types/react": "^19.1.8",
+    "@types/react-dom": "^19.1.6",
+    "@vitejs/plugin-react-swc": "^3.10.2",
+    "eslint": "^9.30.1",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-refresh": "^0.4.20",
+    "globals": "^16.3.0",
+    "object-hash": "^3.0.0",
+    "typescript": "~5.8.3",
+    "typescript-eslint": "^8.35.1",
+    "vite": "^7.0.4"
+  }
+}

browser/src/App.tsx

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+import { MapContainer, GeoJSON, TileLayer } from "react-leaflet";
+import Parser from "./parser/parser";
+import { useEffect, useState } from "react";
+import hash from "object-hash";
+
+const parser = await Parser.instance();
+
+function App() {
+  const [procedure, setProcedure] = useState<string>();
+  console.log(procedure);
+
+  useEffect(() => {
+    (async () => {
+      setProcedure(await parser.parse(10394));
+    })();
+  }, []);
+
+  return (
+    <div style={{ display: "flex", height: "100vh", width: "100vw" }}>
+      <MapContainer
+        center={[51.505, -0.09]}
+        zoom={13}
+        style={{ height: "100%", width: "100%" }}
+      >
+        <TileLayer
+          attribution='&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+          url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+        />
+        <GeoJSON
+          key={hash(procedure ?? "")}
+          data={procedure}
+          style={{
+            color: "#00ffff",
+            stroke: true,
+            weight: 2,
+            opacity: 1,
+          }}
+        />
+      </MapContainer>
+      <div></div>
+    </div>
+  );
+}
+
+export default App;

browser/src/index.css

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+* {
+  box-sizing: border-box;
+}
+
+html,
+body {
+  margin: 0;
+}

browser/src/main.tsx

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+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import App from "./App.tsx";
+
+import "./index.css";
+import "leaflet/dist/leaflet.css";
+
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>
+);

browser/src/parser/node.ts

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+import Parser from "./parser.ts";
+
+// mutate fetch to be local
+
+// @ts-ignore
+fetch = async (path: string) => {
+  // @ts-ignore
+  const fs = await import("fs");
+  return {
+    json: () => JSON.parse(fs.readFileSync(`public/${path}`)),
+  };
+};
+
+const parser = await Parser.instance();
+
+console.log(JSON.stringify(await parser.parse(10394)));

browser/src/parser/parser.ts

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+import "./utils/extensions.ts";
+import { handleTurnAtFix } from "./utils/handleTurnAtFix.ts";
+import * as geolib from "geolib";
+import geojson from "geojson";
+
+class Parser {
+  private static _instance: Parser;
+
+  private waypoints: Waypoint[];
+  private runways: Runway[];
+  private terminals: Terminal[];
+
+  public static AC_SPEED = 250;
+
+  private constructor(
+    waypoints: Waypoint[],
+    runways: Runway[],
+    terminals: Terminal[]
+  ) {
+    this.waypoints = waypoints;
+    this.runways = runways;
+    this.terminals = terminals;
+  }
+
+  public static instance = async () => {
+    if (!Parser._instance) {
+      const waypoints = await (await fetch("navdata/Waypoints.json")).json();
+      const runways = await (await fetch("navdata/Runways.json")).json();
+      const terminals = await (await fetch("navdata/Terminals.json")).json();
+
+      Parser._instance = new Parser(waypoints, runways, terminals);
+    }
+
+    return Parser._instance;
+  };
+
+  public parse = async (terminalID: number) => {
+    // Private functions
+    /**
+     * @param line Line segments
+     */
+    const updateLastCourse = (line: LineSegment[]) => {
+      lastCourse = geolib.getGreatCircleBearing(
+        {
+          latitude: line.at(-2)![1],
+          longitude: line.at(-2)![0],
+        },
+        {
+          latitude: line.at(-1)![1],
+          longitude: line.at(-1)![0],
+        }
+      );
+    };
+
+    // Get Procedure main
+    const terminal = this.terminals.find(({ ID }) => ID === terminalID);
+    if (!terminal) throw new Error("Procedure does not exists");
+    // Get runway this procedure is for
+    const runway = this.runways.find(({ ID }) => ID === terminal.RwyID);
+    if (!runway) throw new Error("Procedure links to non existent Runway");
+    // Load procedure
+    const procedure = (await (
+      await fetch(`navdata/TermID_${terminalID}.json`)
+    ).json()) as TerminalEntry[];
+
+    // Output variables
+    const navFixes: NavFix[] = [];
+    const lineSegments: { line: LineSegment[] }[] = [];
+
+    // Initials
+    navFixes.push({
+      latitude: runway.Latitude,
+      longitude: runway.Longitude,
+      altitude: runway.Elevation,
+      speed: 0,
+      name: runway.Ident,
+    });
+    let lastCourse = runway.TrueHeading;
+
+    // Main
+    for (let index = 0; index < procedure.length; index++) {
+      const leg = procedure[index];
+      const previousFix = navFixes.at(-1)!;
+      const waypoint = this.waypoints.filter(({ ID }) => ID === leg.WptID)[0];
+
+      switch (leg.TrackCode) {
+        case "AF":
+        case "CA":
+        case "CD":
+          break;
+        case "CF": {
+          const _leg = leg as CFTerminalEntry;
+          const targetFix: NavFix = {
+            latitude: _leg.WptLat,
+            longitude: _leg.WptLon,
+            name: waypoint?.Ident ?? undefined,
+            "marker-color": _leg.IsFlyOver ? "#ff0000" : undefined,
+            isFlyOver: _leg.IsFlyOver,
+            altitude: previousFix.altitude,
+          };
+          navFixes.push(targetFix);
+
+          const line = handleTurnAtFix(
+            _leg.Course.toTrue(previousFix),
+            _leg.Course.toTrue(previousFix),
+            lastCourse,
+            previousFix,
+            targetFix,
+            _leg.TurnDir
+          );
+
+          lineSegments.push({ line });
+          updateLastCourse(lineSegments.at(-1)!.line);
+          break;
+        }
+        case "CI":
+        case "CR":
+        case "DF":
+        case "FA":
+        case "FC":
+        case "FD":
+        case "FM":
+        case "HA":
+        case "HF":
+        case "HM":
+        case "IF":
+        case "PI":
+        case "RF":
+        case "TF":
+        case "VA":
+        case "VD":
+        case "VI":
+        case "VM":
+        case "VR":
+        default:
+          console.error("Unknown TrackCode", leg.TrackCode);
+          break;
+      }
+    }
+
+    return geojson.parse([...navFixes, ...lineSegments], {
+      Point: ["latitude", "longitude"],
+      LineString: "line",
+    });
+  };
+}
+
+export default Parser;

browser/src/parser/terminators/AF.ts

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+export const TerminatorsAF = () => {};

browser/src/parser/utils/computeIntersection.ts

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+/**
+ * @param  p1 Point 1
+ * @param brng1 Bearing from Point 1
+ * @param  p2 Point 2
+ * @param brng2 bearing from Point 2
+ * @returns Intersection point
+ */
+export const computeIntersection = (
+  p1: NavFix,
+  brng1: number,
+  p2: NavFix,
+  brng2: number
+): NavFix | null => {
+  if (isNaN(brng1)) throw new TypeError(`invalid brng1 ${brng1}`);
+  if (isNaN(brng2)) throw new TypeError(`invalid brng2 ${brng2}`);
+
+  const π = Math.PI;
+
+  // see www.edwilliams.org/avform.htm#Intersection
+
+  const φ1 = p1.latitude.toRadians(),
+    λ1 = p1.longitude.toRadians();
+  const φ2 = p2.latitude.toRadians(),
+    λ2 = p2.longitude.toRadians();
+  const θ13 = Number(brng1).toRadians(),
+    θ23 = Number(brng2).toRadians();
+  const Δφ = φ2 - φ1,
+    Δλ = λ2 - λ1;
+
+  // angular distance p1-p2
+  const δ12 =
+    2 *
+    Math.asin(
+      Math.sqrt(
+        Math.sin(Δφ / 2) * Math.sin(Δφ / 2) +
+          Math.cos(φ1) * Math.cos(φ2) * Math.sin(Δλ / 2) * Math.sin(Δλ / 2)
+      )
+    );
+  if (Math.abs(δ12) < Number.EPSILON) return p1; // coincident points
+
+  // initial/final bearings between points
+  const cosθa =
+    (Math.sin(φ2) - Math.sin(φ1) * Math.cos(δ12)) /
+    (Math.sin(δ12) * Math.cos(φ1));
+  const cosθb =
+    (Math.sin(φ1) - Math.sin(φ2) * Math.cos(δ12)) /
+    (Math.sin(δ12) * Math.cos(φ2));
+  const θa = Math.acos(Math.min(Math.max(cosθa, -1), 1)); // protect against rounding errors
+  const θb = Math.acos(Math.min(Math.max(cosθb, -1), 1)); // protect against rounding errors
+
+  const θ12 = Math.sin(λ2 - λ1) > 0 ? θa : 2 * π - θa;
+  const θ21 = Math.sin(λ2 - λ1) > 0 ? 2 * π - θb : θb;
+
+  const α1 = θ13 - θ12; // angle 2-1-3
+  const α2 = θ21 - θ23; // angle 1-2-3
+
+  if (Math.sin(α1) == 0 && Math.sin(α2) == 0) return null; // infinite intersections
+  if (Math.sin(α1) * Math.sin(α2) < 0) return null; // ambiguous intersection (antipodal/360°)
+
+  const cosα3 =
+    -Math.cos(α1) * Math.cos(α2) + Math.sin(α1) * Math.sin(α2) * Math.cos(δ12);
+
+  const δ13 = Math.atan2(
+    Math.sin(δ12) * Math.sin(α1) * Math.sin(α2),
+    Math.cos(α2) + Math.cos(α1) * cosα3
+  );
+
+  const φ3 = Math.asin(
+    Math.min(
+      Math.max(
+        Math.sin(φ1) * Math.cos(δ13) +
+          Math.cos(φ1) * Math.sin(δ13) * Math.cos(θ13),
+        -1
+      ),
+      1
+    )
+  );
+
+  const Δλ13 = Math.atan2(
+    Math.sin(θ13) * Math.sin(δ13) * Math.cos(φ1),
+    Math.cos(δ13) - Math.sin(φ1) * Math.sin(φ3)
+  );
+  const λ3 = λ1 + Δλ13;
+
+  const lat = φ3.toDegrees();
+  const lon = λ3.toDegrees();
+
+  return { ...p1, latitude: lat, longitude: lon, name: "INTC" };
+};

browser/src/parser/utils/extensions.ts

@@ -0,0 +1,27 @@
+import { magvar } from "magvar";
+
+Number.prototype.toRadians = function () {
+  return ((this as number) * Math.PI) / 180;
+};
+Number.prototype.toDegrees = function () {
+  return ((this as number) * 180) / Math.PI;
+};
+Number.prototype.reciprocalCourse = function () {
+  let inv = (this as number) + 180;
+  inv = inv >= 360 ? inv - 360 : inv;
+  return inv;
+};
+Number.prototype.normaliseDegrees = function () {
+  return (this as number) >= 360
+    ? (this as number) - 360
+    : (this as number) < 0
+    ? (this as number) + 360
+    : (this as number);
+};
+Number.prototype.toTrue = function (fix) {
+  const _magvar = magvar(fix.latitude, fix.longitude); //Magvar is returned + for East
+  return ((this as number) + _magvar).normaliseDegrees();
+};
+Number.prototype.toMetre = function () {
+  return (this as number) * 1852.0;
+};

browser/src/parser/utils/generatePerformanceArc.ts

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+import * as geolib from "geolib";
+import Parser from "../parser.ts";
+
+/**
+ * @param crsIntoEndpoint Course into arc endpoint
+ * @param crsFromOrigin Course from arc origin point
+ * @param start Arc origin point
+ * @param turnDir Turn direction
+ * @returns Line segments
+ */
+export const generatePerformanceArc = (
+  crsIntoEndpoint: number,
+  crsFromOrigin: number,
+  start: NavFix,
+  turnDir?: TurnDirection
+) => {
+  const line: LineSegment[] = [[start.longitude, start.latitude]];
+
+  // Check if there even is an arc
+  if (crsIntoEndpoint !== crsFromOrigin) {
+    // Turn Dir
+    if (!turnDir || turnDir === "E") {
+      let prov = crsFromOrigin - crsIntoEndpoint;
+      prov = prov > 180 ? prov - 360 : prov <= -180 ? prov + 360 : prov;
+      turnDir = prov > 0 ? "L" : "R";
+    }
+
+    // Generate arc
+    while (crsFromOrigin !== crsIntoEndpoint) {
+      if (turnDir === "R") {
+        const delta = (crsIntoEndpoint - crsFromOrigin).normaliseDegrees();
+        crsFromOrigin += delta < 1 ? delta : 1;
+        crsFromOrigin = crsFromOrigin.normaliseDegrees();
+      } else {
+        const delta = (crsFromOrigin - crsIntoEndpoint).normaliseDegrees();
+        crsFromOrigin -= delta < 1 ? delta : 1;
+        crsFromOrigin = crsFromOrigin.normaliseDegrees();
+      }
+
+      const arcFix = geolib.computeDestinationPoint(
+        {
+          latitude: line.at(-1)![1],
+          longitude: line.at(-1)![0],
+        },
+        (Parser.AC_SPEED / 3600).toMetre(),
+        crsFromOrigin
+      );
+
+      line.push([arcFix.longitude, arcFix.latitude]);
+    }
+  }
+
+  return line;
+};

browser/src/parser/utils/generateTangentArc.ts

@@ -0,0 +1,105 @@
+import * as geolib from "geolib";
+import { computeIntersection } from "./computeIntersection.ts";
+
+/**
+ * @param crsIntoEndpoint Course into arc endpoint
+ * @param crsFromOrigin Course from arc origin point
+ * @param start Arc origin point
+ * @param end Leg endpoint
+ * @param turnDir Turn direction
+ * @returns Line segments forming arc from `start`to `end`
+ */
+export const generateTangentArc = (
+  crsIntoEndpoint: number,
+  crsFromOrigin: number,
+  start: NavFix,
+  end: NavFix,
+  turnDir?: TurnDirection
+) => {
+  const line: LineSegment[] = [[start.longitude, start.latitude]];
+
+  // Check if there even is an arc
+  if (crsFromOrigin !== crsIntoEndpoint) {
+    // Course to the end of the arc
+    let crsFromStartToEnd;
+    if (!turnDir || turnDir === "E") {
+      let prov = crsFromOrigin - crsIntoEndpoint;
+      prov = prov > 180 ? prov - 360 : prov <= -180 ? prov + 360 : prov;
+      turnDir = prov > 0 ? "L" : "R";
+    }
+    if (turnDir === "R") {
+      const delta = (360 - crsFromOrigin + crsIntoEndpoint).normaliseDegrees();
+      crsFromStartToEnd = (crsFromOrigin + delta / 2).normaliseDegrees();
+    } else {
+      const delta = (crsFromOrigin + 360 - crsIntoEndpoint).normaliseDegrees();
+      crsFromStartToEnd = (crsFromOrigin - delta / 2).normaliseDegrees();
+    }
+
+    // Arc end
+    const intcArcOnCrsIntoEndpoint = computeIntersection(
+      start,
+      crsFromStartToEnd,
+      end,
+      crsIntoEndpoint.reciprocalCourse()
+    );
+    if (!intcArcOnCrsIntoEndpoint) return null;
+
+    let crsOrthogonalOnOrigin;
+    let crsOrthogonalOnEndpoint;
+    if (turnDir === "R") {
+      crsOrthogonalOnOrigin = (crsFromOrigin + 90).normaliseDegrees();
+      crsOrthogonalOnEndpoint = (crsIntoEndpoint + 90).normaliseDegrees();
+    } else {
+      crsOrthogonalOnOrigin = (crsFromOrigin - 90).normaliseDegrees();
+      crsOrthogonalOnEndpoint = (crsIntoEndpoint - 90).normaliseDegrees();
+    }
+
+    // Generate arc
+    const arcCenter = computeIntersection(
+      start,
+      crsOrthogonalOnOrigin,
+      intcArcOnCrsIntoEndpoint,
+      crsOrthogonalOnEndpoint
+    );
+    if (!arcCenter) return null;
+    const arcRad = geolib.getDistance(arcCenter, start);
+
+    crsOrthogonalOnOrigin = crsOrthogonalOnOrigin.reciprocalCourse();
+    crsOrthogonalOnEndpoint = crsOrthogonalOnEndpoint.reciprocalCourse();
+    // Start turn immediately
+    if (turnDir === "R") {
+      crsOrthogonalOnOrigin +=
+        crsOrthogonalOnOrigin < 1 ? crsOrthogonalOnOrigin : 1;
+    } else {
+      crsOrthogonalOnOrigin -=
+        crsOrthogonalOnOrigin < 1 ? crsOrthogonalOnOrigin : 1;
+    }
+
+    while (crsOrthogonalOnOrigin !== crsOrthogonalOnEndpoint) {
+      if (turnDir === "R") {
+        const delta = (
+          crsOrthogonalOnEndpoint - crsOrthogonalOnOrigin
+        ).normaliseDegrees();
+        crsOrthogonalOnOrigin += delta < 1 ? delta : 1;
+        crsOrthogonalOnOrigin = crsOrthogonalOnOrigin.normaliseDegrees();
+      } else {
+        const delta = (
+          crsOrthogonalOnOrigin - crsOrthogonalOnEndpoint
+        ).normaliseDegrees();
+        crsOrthogonalOnOrigin -= delta < 1 ? delta : 1;
+        crsOrthogonalOnOrigin = crsOrthogonalOnOrigin.normaliseDegrees();
+      }
+      if (crsOrthogonalOnOrigin === crsOrthogonalOnEndpoint) break;
+
+      const arcFix = geolib.computeDestinationPoint(
+        arcCenter,
+        arcRad,
+        crsOrthogonalOnOrigin
+      );
+
+      line.push([arcFix.longitude, arcFix.latitude]);
+    }
+  }
+
+  return line;
+};

browser/src/parser/utils/handleTurnAtFix.ts

@@ -0,0 +1,68 @@
+import * as geolib from "geolib";
+import { generateTangentArc } from "./generateTangentArc.ts";
+import { generatePerformanceArc } from "./generatePerformanceArc.ts";
+
+/**
+ * @param crsIntoEndpoint Course into endpoint
+ * @param crsIntoIntercept Course into intercept point (only fo intercept type legs)
+ * @param crsFromOrigin Course from arc origin point
+ * @param start Waypoint where leg starts
+ * @param end Waypoint where leg ends
+ * @param turnDir Turn direction
+ * @returns Line segments from `start` to `end`
+ */
+export const handleTurnAtFix = (
+  crsIntoEndpoint: number,
+  crsIntoIntercept: number,
+  crsFromOrigin: number,
+  start: NavFix,
+  end: NavFix,
+  turnDir?: TurnDirection
+) => {
+  const line: LineSegment[] = [];
+
+  // Overfly turn
+  if (start.isFlyOver) {
+    const arc1 = generateTangentArc(
+      crsIntoEndpoint,
+      crsFromOrigin,
+      start,
+      end,
+      turnDir
+    );
+
+    const arc2 = generatePerformanceArc(
+      crsIntoIntercept,
+      crsFromOrigin,
+      start,
+      turnDir
+    );
+
+    // Decide on arc
+    let arc;
+    if (arc1) {
+      const endCrs = geolib.getGreatCircleBearing(
+        {
+          latitude: arc1.at(-1)![1],
+          longitude: arc1.at(-1)![0],
+        },
+        end
+      );
+
+      if (endCrs <= crsIntoEndpoint + 1 && endCrs >= crsIntoEndpoint - 1)
+        arc = arc1;
+      else arc = arc2;
+    } else {
+      arc = arc2;
+    }
+    line.push(...arc);
+    line.push([end.longitude, end.latitude]);
+  }
+  // FIXME: Procedural turn
+  else {
+    // Direct line for now
+    line.push([start.longitude, start.latitude], [end.longitude, end.latitude]);
+  }
+
+  return line;
+};

browser/src/types/extensions.d.ts

@@ -0,0 +1,29 @@
+export declare global {
+  interface Number {
+    /**
+     * @returns Value converted from degrees to radians
+     */
+    toRadians: () => number;
+    /**
+     * @returns Value converted from radians to degrees
+     */
+    toDegrees: () => number;
+    /**
+     * @returns Reciprocal course of value
+     */
+    reciprocalCourse: () => number;
+    /**
+     * @returns Normalises to [0,360)
+     */
+    normaliseDegrees: () => number;
+    /**
+     * @param fix Fix for magnetic declination
+     * @returns Value referencing true north
+     */
+    toTrue: (fix: { latitude: number; longitude: number }) => number;
+    /**
+     * @returns Value converted from nmi to metres
+     */
+    toMetre: () => number;
+  }
+}

browser/src/types/geojson.d.ts

@@ -0,0 +1,3 @@
+declare module "geojson" {
+  export const parse: (data: any, format: any) => any;
+}

browser/src/types/magvar.d.ts

@@ -0,0 +1,3 @@
+declare module "magvar" {
+  export const magvar: (latitude: number, longitude: number) => number;
+}

browser/src/types/terminators/AF.d.ts

@@ -0,0 +1,18 @@
+export declare global {
+  type AFTerminalEntry = Required<
+    Pick<
+      TerminalEntry,
+      | "TurnDir"
+      | "WptID"
+      | "WptLat"
+      | "WptLon"
+      | "NavID"
+      | "NavLat"
+      | "NavLon"
+      | "NavBear"
+      | "NavDist"
+      | "Course"
+    >
+  > &
+    TerminalEntry;
+}

browser/src/types/terminators/CF.d.ts

@@ -0,0 +1,18 @@
+export declare global {
+  type CFTerminalEntry = Required<
+    Pick<
+      TerminalEntry,
+      | "WptID"
+      | "WptLat"
+      | "WptLon"
+      | "NavID"
+      | "NavLat"
+      | "NavLon"
+      | "NavBear"
+      | "NavDist"
+      | "Course"
+      | "Distance"
+    >
+  > &
+    TerminalEntry;
+}

browser/src/types/types.d.ts

@@ -0,0 +1,91 @@
+export declare global {
+  type Waypoint = {
+    ID: number;
+    Ident: string;
+  };
+
+  type Runway = {
+    ID: number;
+    Latitude: number;
+    Longitude: number;
+    Elevation: number;
+    Ident: string;
+    TrueHeading: number;
+  };
+
+  type TrackCode =
+    | "AF"
+    | "CA"
+    | "CD"
+    | "CF"
+    | "CI"
+    | "CR"
+    | "DF"
+    | "FA"
+    | "FC"
+    | "FD"
+    | "FM"
+    | "HA"
+    | "HF"
+    | "HM"
+    | "IF"
+    | "PI"
+    | "RF"
+    | "TF"
+    | "VA"
+    | "VD"
+    | "VI"
+    | "VM"
+    | "VR";
+
+  type TurnDirection = "E" | "L" | "R";
+
+  type TerminalEntry = {
+    ID: number;
+    TerminalID: number;
+    Type: string;
+    Transition: string;
+    TrackCode: TrackCode;
+    WptID?: number;
+    WptLat?: number;
+    WptLon?: number;
+    TurnDir?: TurnDirection;
+    NavID?: number;
+    NavLat?: number;
+    NavLon?: number;
+    NavBear?: number;
+    NavDist?: number;
+    Course?: number;
+    Distance?: number;
+    Alt?: string;
+    Vnav: unknown;
+    CenterID?: number;
+    CenterLat?: number;
+    CenterLon?: number;
+    IsFlyOver: boolean;
+    SpeedLimit?: string;
+    IsFAF: boolean;
+    IsMAP: boolean;
+  };
+
+  type Terminal = {
+    ID: number;
+    FullName: string;
+    ICAO: string;
+    RwyID: number;
+  };
+
+  type NavFix = {
+    latitude: number;
+    longitude: number;
+    altitude?: number;
+    speed?: number;
+    name?: string;
+    isFlyOver?: boolean;
+    "marker-color"?: string;
+    altitudeConstraint?: string;
+    speedConstraint?: string;
+  };
+
+  type LineSegment = [number, number];
+}

browser/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

browser/tsconfig.app.json

@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "typeRoots": ["node_modules/@types", "src/types/**"],
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}

browser/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}

browser/tsconfig.node.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "typeRoots": ["node_modules/@types", "src/types/**"],
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}

browser/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react-swc'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})