feat: 氧化铝数字孪生系统监控大屏完成

node_modules/delaunator/LICENSE

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+ISC License
+
+Copyright (c) 2026, Mapbox
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.

node_modules/delaunator/README.md

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+# Delaunator [![CI](https://github.com/mapbox/delaunator/actions/workflows/node.yml/badge.svg)](https://github.com/mapbox/delaunator/actions/workflows/node.yml) [![](https://img.shields.io/badge/simply-awesome-brightgreen.svg)](https://github.com/mourner/projects) [![](https://badgen.net/bundlephobia/minzip/delaunator)](https://unpkg.com/delaunator)
+
+An incredibly fast and robust JavaScript library for
+[Delaunay triangulation](https://en.wikipedia.org/wiki/Delaunay_triangulation) of 2D points.
+
+- [Interactive Demo](https://mapbox.github.io/delaunator/demo.html)
+- [Guide to data structures](https://mapbox.github.io/delaunator/)
+
+<img src="delaunator.png" alt="Delaunay triangulation example" width="600" />
+
+### Projects based on Delaunator
+
+- [d3-delaunay](https://github.com/d3/d3-delaunay) for Voronoi diagrams, search, traversal and rendering (a part of [D3](https://d3js.org)).
+- [d3-geo-voronoi](https://github.com/Fil/d3-geo-voronoi) for Delaunay triangulations and Voronoi diagrams on a sphere (e.g. for geographic locations).
+
+## Example
+
+```js
+const coords = [377,479,  453,434,  326,387,  444,359,  511,389,
+                586,429,  470,315,  622,493,  627,367,  570,314];
+const delaunay = new Delaunator(coords);
+console.log(delaunay.triangles);
+// [4,3,1,  4,6,3,  1,5,4,  4,9,6,  2,0,1,  1,7,5,
+//  5,9,4,  6,2,3,  3,2,1,  5,8,9,  0,7,1,  5,7,8]
+```
+
+<img src="docs/example.png" alt="Delaunay triangulation example with labeled points" width="600" />
+
+## Install
+
+Install with NPM (`npm install delaunator`) or Yarn (`yarn add delaunator`), then import as an ES module:
+
+```js
+import Delaunator from 'delaunator';
+```
+
+To use as a module in a browser:
+
+```html
+<script type="module">
+    import Delaunator from 'https://cdn.skypack.dev/delaunator@5.0.0';
+</script>
+```
+
+Or use a browser UMD build that exposes a `Delaunator` global variable:
+
+```html
+<script src="https://unpkg.com/delaunator@5.0.0/delaunator.min.js"></script>
+```
+
+## API Reference
+
+#### new Delaunator(coords)
+
+Constructs a delaunay triangulation object given an array of point coordinates of the form:
+`[x0, y0, x1, y1, ...]` (use a typed array for best performance).
+
+#### Delaunator.from(points[, getX, getY])
+
+Constructs a delaunay triangulation object given an array of points (`[x, y]` by default).
+`getX` and `getY` are optional functions of the form `(point) => value` for custom point formats.
+Duplicate points are skipped.
+
+#### delaunay.triangles
+
+A `Uint32Array` array of triangle vertex indices (each group of three numbers forms a triangle).
+All triangles are directed counterclockwise.
+
+To get the coordinates of all triangles when using `Delaunator.from(points)`, use:
+
+```js
+for (let i = 0; i < triangles.length; i += 3) {
+    coordinates.push([
+        points[triangles[i]],
+        points[triangles[i + 1]],
+        points[triangles[i + 2]]
+    ]);
+}
+```
+
+To get the coordinates of all triangles when using `new Delaunator(coords)`, use:
+
+```js
+for (let i = 0; i < triangles.length; i += 3) {
+    coordinates.push([
+        [coords[2 * triangles[i]],     coords[2 * triangles[i] + 1]],
+        [coords[2 * triangles[i + 1]], coords[2 * triangles[i + 1] + 1]],
+        [coords[2 * triangles[i + 2]], coords[2 * triangles[i + 2] + 1]]
+    ]);
+}
+```
+
+#### delaunay.halfedges
+
+A `Int32Array` array of triangle half-edge indices that allows you to traverse the triangulation.
+`i`-th half-edge in the array corresponds to vertex `triangles[i]` the half-edge is coming from.
+`halfedges[i]` is the index of a twin half-edge in an adjacent triangle
+(or `-1` for outer half-edges on the convex hull).
+
+The flat array-based data structures might be counterintuitive,
+but they're one of the key reasons this library is fast.
+
+#### delaunay.hull
+
+A `Uint32Array` array of indices that reference points on the convex hull of the input data, counter-clockwise.
+
+#### delaunay.coords
+
+An array of input coordinates in the form `[x0, y0, x1, y1, ....]`,
+of the type provided in the constructor (or `Float64Array` if you used `Delaunator.from`).
+
+#### delaunay.update()
+
+Updates the triangulation if you modified `delaunay.coords` values in place, avoiding expensive memory allocations.
+Useful for iterative relaxation algorithms such as [Lloyd's](https://en.wikipedia.org/wiki/Lloyd%27s_algorithm).
+
+## Performance
+
+Benchmark results against other Delaunay JS libraries
+(`npm run bench` on Macbook Pro Retina 15" 2017, Node v10.10.0):
+
+&nbsp; | uniform 100k | gauss 100k | grid 100k | degen 100k | uniform 1&nbsp;million | gauss 1&nbsp;million | grid 1&nbsp;million | degen 1&nbsp;million
+:-- | --: | --: | --: | --: | --: | --: | --: | --:
+**delaunator** | 82ms | 61ms | 66ms | 25ms | 1.07s | 950ms | 830ms | 278ms
+[faster&#8209;delaunay](https://github.com/Bathlamos/delaunay-triangulation) | 473ms | 411ms | 272ms | 68ms | 4.27s | 4.62s | 4.3s | 810ms
+[incremental&#8209;delaunay](https://github.com/mikolalysenko/incremental-delaunay) | 547ms | 505ms | 172ms | 528ms | 5.9s | 6.08s | 2.11s | 6.09s
+[d3&#8209;voronoi](https://github.com/d3/d3-voronoi) | 972ms | 909ms | 358ms | 720ms | 15.04s | 13.86s | 5.55s | 11.13s
+[delaunay&#8209;fast](https://github.com/darkskyapp/delaunay-fast) | 3.8s | 4s | 12.57s | timeout | 132s | 138s | 399s | timeout
+[delaunay](https://github.com/darkskyapp/delaunay) | 4.85s | 5.73s | 15.05s | timeout | 156s | 178s | 326s | timeout
+[delaunay&#8209;triangulate](https://github.com/mikolalysenko/delaunay-triangulate) | 2.24s | 2.04s | OOM | 1.51s | OOM | OOM | OOM | OOM
+[cdt2d](https://github.com/mikolalysenko/cdt2d) | 45s | 51s | 118s | 17s | timeout | timeout | timeout | timeout
+
+## Papers
+
+The algorithm is based on ideas from the following papers:
+
+- [A simple sweep-line Delaunay triangulation algorithm](http://www.academicpub.org/jao/paperInfo.aspx?paperid=15630), 2013, Liu Yonghe, Feng Jinming and Shao Yuehong
+- [S-hull: a fast radial sweep-hull routine for Delaunay triangulation](http://www.s-hull.org/paper/s_hull.pdf), 2010, David Sinclair
+- [A faster circle-sweep Delaunay triangulation algorithm](http://cglab.ca/~biniaz/papers/Sweep%20Circle.pdf), 2011, Ahmad Biniaz and Gholamhossein Dastghaibyfard
+
+## Robustness
+
+Delaunator should produce valid output even on highly degenerate input. It does so by depending on [robust-predicates](https://github.com/mourner/robust-predicates), a modern port of Jonathan Shewchuk's robust geometric predicates, an industry standard in computational geometry.
+
+## Ports to other languages
+
+- [delaunator-rs](https://github.com/mourner/delaunator-rs) (Rust)
+- [fogleman/delaunay](https://github.com/fogleman/delaunay) (Go)
+- [delaunator-cpp](https://github.com/abellgithub/delaunator-cpp) (C++)
+- [delaunator-sharp](https://github.com/nol1fe/delaunator-sharp) (C#)
+- [delaunator-ruby](https://github.com/hendrixfan/delaunator-ruby) (Ruby)
+- [Delaunator-Python](https://github.com/HakanSeven12/Delaunator-Python) (Python)
+- [torch-delaunay](https://github.com/ybubnov/torch_delaunay) (Python/Torch)
+- [ricardomatias/delaunator](https://github.com/ricardomatias/delaunator) (Kotlin)
+- [delaunator-java](https://github.com/waveware4ai/delaunator-java) (Java)
+- [delaunay-Stata](https://github.com/asjadnaqvi/stata-delaunay-voronoi) (Stata/Mata)
+- [Delaunator.jl](https://github.com/JuliaGeometry/Delaunator.jl) (Julia)

node_modules/delaunator/delaunator.js

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+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+typeof define === 'function' && define.amd ? define(factory) :
+(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Delaunator = factory());
+})(this, (function () { 'use strict';
+
+const epsilon = 1.1102230246251565e-16;
+const splitter = 134217729;
+const resulterrbound = (3 + 8 * epsilon) * epsilon;
+
+// fast_expansion_sum_zeroelim routine from oritinal code
+function sum(elen, e, flen, f, h) {
+    let Q, Qnew, hh, bvirt;
+    let enow = e[0];
+    let fnow = f[0];
+    let eindex = 0;
+    let findex = 0;
+    if ((fnow > enow) === (fnow > -enow)) {
+        Q = enow;
+        enow = e[++eindex];
+    } else {
+        Q = fnow;
+        fnow = f[++findex];
+    }
+    let hindex = 0;
+    if (eindex < elen && findex < flen) {
+        if ((fnow > enow) === (fnow > -enow)) {
+            Qnew = enow + Q;
+            hh = Q - (Qnew - enow);
+            enow = e[++eindex];
+        } else {
+            Qnew = fnow + Q;
+            hh = Q - (Qnew - fnow);
+            fnow = f[++findex];
+        }
+        Q = Qnew;
+        if (hh !== 0) {
+            h[hindex++] = hh;
+        }
+        while (eindex < elen && findex < flen) {
+            if ((fnow > enow) === (fnow > -enow)) {
+                Qnew = Q + enow;
+                bvirt = Qnew - Q;
+                hh = Q - (Qnew - bvirt) + (enow - bvirt);
+                enow = e[++eindex];
+            } else {
+                Qnew = Q + fnow;
+                bvirt = Qnew - Q;
+                hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+                fnow = f[++findex];
+            }
+            Q = Qnew;
+            if (hh !== 0) {
+                h[hindex++] = hh;
+            }
+        }
+    }
+    while (eindex < elen) {
+        Qnew = Q + enow;
+        bvirt = Qnew - Q;
+        hh = Q - (Qnew - bvirt) + (enow - bvirt);
+        enow = e[++eindex];
+        Q = Qnew;
+        if (hh !== 0) {
+            h[hindex++] = hh;
+        }
+    }
+    while (findex < flen) {
+        Qnew = Q + fnow;
+        bvirt = Qnew - Q;
+        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+        fnow = f[++findex];
+        Q = Qnew;
+        if (hh !== 0) {
+            h[hindex++] = hh;
+        }
+    }
+    if (Q !== 0 || hindex === 0) {
+        h[hindex++] = Q;
+    }
+    return hindex;
+}
+
+function estimate(elen, e) {
+    let Q = e[0];
+    for (let i = 1; i < elen; i++) Q += e[i];
+    return Q;
+}
+
+function vec(n) {
+    return new Float64Array(n);
+}
+
+const ccwerrboundA = (3 + 16 * epsilon) * epsilon;
+const ccwerrboundB = (2 + 12 * epsilon) * epsilon;
+const ccwerrboundC = (9 + 64 * epsilon) * epsilon * epsilon;
+
+const B = vec(4);
+const C1 = vec(8);
+const C2 = vec(12);
+const D = vec(16);
+const u = vec(4);
+
+function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
+    let acxtail, acytail, bcxtail, bcytail;
+    let bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
+
+    const acx = ax - cx;
+    const bcx = bx - cx;
+    const acy = ay - cy;
+    const bcy = by - cy;
+
+    s1 = acx * bcy;
+    c = splitter * acx;
+    ahi = c - (c - acx);
+    alo = acx - ahi;
+    c = splitter * bcy;
+    bhi = c - (c - bcy);
+    blo = bcy - bhi;
+    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+    t1 = acy * bcx;
+    c = splitter * acy;
+    ahi = c - (c - acy);
+    alo = acy - ahi;
+    c = splitter * bcx;
+    bhi = c - (c - bcx);
+    blo = bcx - bhi;
+    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+    _i = s0 - t0;
+    bvirt = s0 - _i;
+    B[0] = s0 - (_i + bvirt) + (bvirt - t0);
+    _j = s1 + _i;
+    bvirt = _j - s1;
+    _0 = s1 - (_j - bvirt) + (_i - bvirt);
+    _i = _0 - t1;
+    bvirt = _0 - _i;
+    B[1] = _0 - (_i + bvirt) + (bvirt - t1);
+    u3 = _j + _i;
+    bvirt = u3 - _j;
+    B[2] = _j - (u3 - bvirt) + (_i - bvirt);
+    B[3] = u3;
+
+    let det = estimate(4, B);
+    let errbound = ccwerrboundB * detsum;
+    if (det >= errbound || -det >= errbound) {
+        return det;
+    }
+
+    bvirt = ax - acx;
+    acxtail = ax - (acx + bvirt) + (bvirt - cx);
+    bvirt = bx - bcx;
+    bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
+    bvirt = ay - acy;
+    acytail = ay - (acy + bvirt) + (bvirt - cy);
+    bvirt = by - bcy;
+    bcytail = by - (bcy + bvirt) + (bvirt - cy);
+
+    if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
+        return det;
+    }
+
+    errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
+    det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
+    if (det >= errbound || -det >= errbound) return det;
+
+    s1 = acxtail * bcy;
+    c = splitter * acxtail;
+    ahi = c - (c - acxtail);
+    alo = acxtail - ahi;
+    c = splitter * bcy;
+    bhi = c - (c - bcy);
+    blo = bcy - bhi;
+    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+    t1 = acytail * bcx;
+    c = splitter * acytail;
+    ahi = c - (c - acytail);
+    alo = acytail - ahi;
+    c = splitter * bcx;
+    bhi = c - (c - bcx);
+    blo = bcx - bhi;
+    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+    _i = s0 - t0;
+    bvirt = s0 - _i;
+    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+    _j = s1 + _i;
+    bvirt = _j - s1;
+    _0 = s1 - (_j - bvirt) + (_i - bvirt);
+    _i = _0 - t1;
+    bvirt = _0 - _i;
+    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+    u3 = _j + _i;
+    bvirt = u3 - _j;
+    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+    u[3] = u3;
+    const C1len = sum(4, B, 4, u, C1);
+
+    s1 = acx * bcytail;
+    c = splitter * acx;
+    ahi = c - (c - acx);
+    alo = acx - ahi;
+    c = splitter * bcytail;
+    bhi = c - (c - bcytail);
+    blo = bcytail - bhi;
+    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+    t1 = acy * bcxtail;
+    c = splitter * acy;
+    ahi = c - (c - acy);
+    alo = acy - ahi;
+    c = splitter * bcxtail;
+    bhi = c - (c - bcxtail);
+    blo = bcxtail - bhi;
+    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+    _i = s0 - t0;
+    bvirt = s0 - _i;
+    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+    _j = s1 + _i;
+    bvirt = _j - s1;
+    _0 = s1 - (_j - bvirt) + (_i - bvirt);
+    _i = _0 - t1;
+    bvirt = _0 - _i;
+    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+    u3 = _j + _i;
+    bvirt = u3 - _j;
+    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+    u[3] = u3;
+    const C2len = sum(C1len, C1, 4, u, C2);
+
+    s1 = acxtail * bcytail;
+    c = splitter * acxtail;
+    ahi = c - (c - acxtail);
+    alo = acxtail - ahi;
+    c = splitter * bcytail;
+    bhi = c - (c - bcytail);
+    blo = bcytail - bhi;
+    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+    t1 = acytail * bcxtail;
+    c = splitter * acytail;
+    ahi = c - (c - acytail);
+    alo = acytail - ahi;
+    c = splitter * bcxtail;
+    bhi = c - (c - bcxtail);
+    blo = bcxtail - bhi;
+    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+    _i = s0 - t0;
+    bvirt = s0 - _i;
+    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+    _j = s1 + _i;
+    bvirt = _j - s1;
+    _0 = s1 - (_j - bvirt) + (_i - bvirt);
+    _i = _0 - t1;
+    bvirt = _0 - _i;
+    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+    u3 = _j + _i;
+    bvirt = u3 - _j;
+    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+    u[3] = u3;
+    const Dlen = sum(C2len, C2, 4, u, D);
+
+    return D[Dlen - 1];
+}
+
+function orient2d(ax, ay, bx, by, cx, cy) {
+    const detleft = (ay - cy) * (bx - cx);
+    const detright = (ax - cx) * (by - cy);
+    const det = detleft - detright;
+
+    const detsum = Math.abs(detleft + detright);
+    if (Math.abs(det) >= ccwerrboundA * detsum) return det;
+
+    return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
+}
+
+const EPSILON = Math.pow(2, -52);
+const EDGE_STACK = new Uint32Array(512);
+
+/** @template {ArrayLike<number>} T */
+class Delaunator {
+
+    /**
+     * Constructs a delaunay triangulation object given an array of points (`[x, y]` by default).
+     * `getX` and `getY` are optional functions of the form `(point) => value` for custom point formats.
+     *
+     * @template P
+     * @param {P[]} points
+     * @param {(p: P) => number} [getX]
+     * @param {(p: P) => number} [getY]
+     */
+    // @ts-expect-error TS2322
+    static from(points, getX = defaultGetX, getY = defaultGetY) {
+        const n = points.length;
+        const coords = new Float64Array(n * 2);
+
+        for (let i = 0; i < n; i++) {
+            const p = points[i];
+            coords[2 * i] = getX(p);
+            coords[2 * i + 1] = getY(p);
+        }
+
+        return new Delaunator(coords);
+    }
+
+    /**
+     * Constructs a delaunay triangulation object given an array of point coordinates of the form:
+     * `[x0, y0, x1, y1, ...]` (use a typed array for best performance). Duplicate points are skipped.
+     *
+     * @param {T} coords
+     */
+    constructor(coords) {
+        const n = coords.length >> 1;
+        if (n > 0 && typeof coords[0] !== 'number') throw new Error('Expected coords to contain numbers.');
+
+        this.coords = coords;
+
+        // arrays that will store the triangulation graph
+        const maxTriangles = Math.max(2 * n - 5, 0);
+        /** @private */ this._triangles = new Uint32Array(maxTriangles * 3);
+        /** @private */ this._halfedges = new Int32Array(maxTriangles * 3);
+
+        // temporary arrays for tracking the edges of the advancing convex hull
+        /** @private */ this._hashSize = Math.ceil(Math.sqrt(n));
+        /** @private */ this._hullPrev = new Uint32Array(n); // edge to prev edge
+        /** @private */ this._hullNext = new Uint32Array(n); // edge to next edge
+        /** @private */ this._hullTri = new Uint32Array(n); // edge to adjacent triangle
+        /** @private */ this._hullHash = new Int32Array(this._hashSize); // angular edge hash
+
+        // temporary arrays for sorting points
+        /** @private */ this._ids = new Uint32Array(n);
+        /** @private */ this._dists = new Float64Array(n);
+
+        /** @private */ this.trianglesLen = 0;
+        /** @private */ this._cx = 0;
+        /** @private */ this._cy = 0;
+        /** @private */ this._hullStart = 0;
+
+
+        /** A `Uint32Array` array of indices that reference points on the convex hull of the input data, counter-clockwise. */
+        this.hull = this._triangles;
+        /** A `Uint32Array` array of triangle vertex indices (each group of three numbers forms a triangle). All triangles are directed counterclockwise. */
+        this.triangles = this._triangles;
+        /**
+         * A `Int32Array` array of triangle half-edge indices that allows you to traverse the triangulation.
+         * `i`-th half-edge in the array corresponds to vertex `triangles[i]` the half-edge is coming from.
+         * `halfedges[i]` is the index of a twin half-edge in an adjacent triangle (or `-1` for outer half-edges on the convex hull).
+         */
+        this.halfedges = this._halfedges;
+
+        this.update();
+    }
+
+    /**
+     * Updates the triangulation if you modified `delaunay.coords` values in place, avoiding expensive memory allocations.
+     * Useful for iterative relaxation algorithms such as Lloyd's.
+     */
+    update() {
+        const {coords, _hullPrev: hullPrev, _hullNext: hullNext, _hullTri: hullTri, _hullHash: hullHash} =  this;
+        const n = coords.length >> 1;
+
+        // populate an array of point indices; calculate input data bbox
+        let minX = Infinity;
+        let minY = Infinity;
+        let maxX = -Infinity;
+        let maxY = -Infinity;
+
+        for (let i = 0; i < n; i++) {
+            const x = coords[2 * i];
+            const y = coords[2 * i + 1];
+            if (x < minX) minX = x;
+            if (y < minY) minY = y;
+            if (x > maxX) maxX = x;
+            if (y > maxY) maxY = y;
+            this._ids[i] = i;
+        }
+        const cx = (minX + maxX) / 2;
+        const cy = (minY + maxY) / 2;
+
+        let i0 = 0, i1 = 0, i2 = 0;
+
+        // pick a seed point close to the center
+        for (let i = 0, minDist = Infinity; i < n; i++) {
+            const d = dist(cx, cy, coords[2 * i], coords[2 * i + 1]);
+            if (d < minDist) {
+                i0 = i;
+                minDist = d;
+            }
+        }
+        const i0x = coords[2 * i0];
+        const i0y = coords[2 * i0 + 1];
+
+        // find the point closest to the seed
+        for (let i = 0, minDist = Infinity; i < n; i++) {
+            if (i === i0) continue;
+            const d = dist(i0x, i0y, coords[2 * i], coords[2 * i + 1]);
+            if (d < minDist && d > 0) {
+                i1 = i;
+                minDist = d;
+            }
+        }
+        let i1x = coords[2 * i1];
+        let i1y = coords[2 * i1 + 1];
+
+        let minRadius = Infinity;
+
+        // find the third point which forms the smallest circumcircle with the first two
+        for (let i = 0; i < n; i++) {
+            if (i === i0 || i === i1) continue;
+            const r = circumradius(i0x, i0y, i1x, i1y, coords[2 * i], coords[2 * i + 1]);
+            if (r < minRadius) {
+                i2 = i;
+                minRadius = r;
+            }
+        }
+        let i2x = coords[2 * i2];
+        let i2y = coords[2 * i2 + 1];
+
+        if (minRadius === Infinity) {
+            // order collinear points by dx (or dy if all x are identical)
+            // and return the list as a hull
+            for (let i = 0; i < n; i++) {
+                this._dists[i] = (coords[2 * i] - coords[0]) || (coords[2 * i + 1] - coords[1]);
+            }
+            quicksort(this._ids, this._dists, 0, n - 1);
+            const hull = new Uint32Array(n);
+            let j = 0;
+            for (let i = 0, d0 = -Infinity; i < n; i++) {
+                const id = this._ids[i];
+                const d = this._dists[id];
+                if (d > d0) {
+                    hull[j++] = id;
+                    d0 = d;
+                }
+            }
+            this.hull = hull.subarray(0, j);
+            this.triangles = new Uint32Array(0);
+            this.halfedges = new Int32Array(0);
+            return;
+        }
+
+        // swap the order of the seed points for counter-clockwise orientation
+        if (orient2d(i0x, i0y, i1x, i1y, i2x, i2y) < 0) {
+            const i = i1;
+            const x = i1x;
+            const y = i1y;
+            i1 = i2;
+            i1x = i2x;
+            i1y = i2y;
+            i2 = i;
+            i2x = x;
+            i2y = y;
+        }
+
+        const center = circumcenter(i0x, i0y, i1x, i1y, i2x, i2y);
+        this._cx = center.x;
+        this._cy = center.y;
+
+        for (let i = 0; i < n; i++) {
+            this._dists[i] = dist(coords[2 * i], coords[2 * i + 1], center.x, center.y);
+        }
+
+        // sort the points by distance from the seed triangle circumcenter
+        quicksort(this._ids, this._dists, 0, n - 1);
+
+        // set up the seed triangle as the starting hull
+        this._hullStart = i0;
+        let hullSize = 3;
+
+        hullNext[i0] = hullPrev[i2] = i1;
+        hullNext[i1] = hullPrev[i0] = i2;
+        hullNext[i2] = hullPrev[i1] = i0;
+
+        hullTri[i0] = 0;
+        hullTri[i1] = 1;
+        hullTri[i2] = 2;
+
+        hullHash.fill(-1);
+        hullHash[this._hashKey(i0x, i0y)] = i0;
+        hullHash[this._hashKey(i1x, i1y)] = i1;
+        hullHash[this._hashKey(i2x, i2y)] = i2;
+
+        this.trianglesLen = 0;
+        this._addTriangle(i0, i1, i2, -1, -1, -1);
+
+        for (let k = 0, xp = 0, yp = 0; k < this._ids.length; k++) {
+            const i = this._ids[k];
+            const x = coords[2 * i];
+            const y = coords[2 * i + 1];
+
+            // skip near-duplicate points
+            if (k > 0 && Math.abs(x - xp) <= EPSILON && Math.abs(y - yp) <= EPSILON) continue;
+            xp = x;
+            yp = y;
+
+            // skip seed triangle points
+            if (i === i0 || i === i1 || i === i2) continue;
+
+            // find a visible edge on the convex hull using edge hash
+            let start = 0;
+            for (let j = 0, key = this._hashKey(x, y); j < this._hashSize; j++) {
+                start = hullHash[(key + j) % this._hashSize];
+                if (start !== -1 && start !== hullNext[start]) break;
+            }
+
+            start = hullPrev[start];
+            let e = start, q;
+            while (q = hullNext[e], orient2d(x, y, coords[2 * e], coords[2 * e + 1], coords[2 * q], coords[2 * q + 1]) >= 0) {
+                e = q;
+                if (e === start) {
+                    e = -1;
+                    break;
+                }
+            }
+            if (e === -1) continue; // likely a near-duplicate point; skip it
+
+            // add the first triangle from the point
+            let t = this._addTriangle(e, i, hullNext[e], -1, -1, hullTri[e]);
+
+            // recursively flip triangles from the point until they satisfy the Delaunay condition
+            hullTri[i] = this._legalize(t + 2);
+            hullTri[e] = t; // keep track of boundary triangles on the hull
+            hullSize++;
+
+            // walk forward through the hull, adding more triangles and flipping recursively
+            let n = hullNext[e];
+            while (q = hullNext[n], orient2d(x, y, coords[2 * n], coords[2 * n + 1], coords[2 * q], coords[2 * q + 1]) < 0) {
+                t = this._addTriangle(n, i, q, hullTri[i], -1, hullTri[n]);
+                hullTri[i] = this._legalize(t + 2);
+                hullNext[n] = n; // mark as removed
+                hullSize--;
+                n = q;
+            }
+
+            // walk backward from the other side, adding more triangles and flipping
+            if (e === start) {
+                while (q = hullPrev[e], orient2d(x, y, coords[2 * q], coords[2 * q + 1], coords[2 * e], coords[2 * e + 1]) < 0) {
+                    t = this._addTriangle(q, i, e, -1, hullTri[e], hullTri[q]);
+                    this._legalize(t + 2);
+                    hullTri[q] = t;
+                    hullNext[e] = e; // mark as removed
+                    hullSize--;
+                    e = q;
+                }
+            }
+
+            // update the hull indices
+            this._hullStart = hullPrev[i] = e;
+            hullNext[e] = hullPrev[n] = i;
+            hullNext[i] = n;
+
+            // save the two new edges in the hash table
+            hullHash[this._hashKey(x, y)] = i;
+            hullHash[this._hashKey(coords[2 * e], coords[2 * e + 1])] = e;
+        }
+
+        this.hull = new Uint32Array(hullSize);
+        for (let i = 0, e = this._hullStart; i < hullSize; i++) {
+            this.hull[i] = e;
+            e = hullNext[e];
+        }
+
+        // trim typed triangle mesh arrays
+        this.triangles = this._triangles.subarray(0, this.trianglesLen);
+        this.halfedges = this._halfedges.subarray(0, this.trianglesLen);
+    }
+
+    /**
+     * Calculate an angle-based key for the edge hash used for advancing convex hull.
+     *
+     * @param {number} x
+     * @param {number} y
+     * @private
+     */
+    _hashKey(x, y) {
+        return Math.floor(pseudoAngle(x - this._cx, y - this._cy) * this._hashSize) % this._hashSize;
+    }
+
+    /**
+     * Flip an edge in a pair of triangles if it doesn't satisfy the Delaunay condition.
+     *
+     * @param {number} a
+     * @private
+     */
+    _legalize(a) {
+        const {_triangles: triangles, _halfedges: halfedges, coords} = this;
+
+        let i = 0;
+        let ar = 0;
+
+        // recursion eliminated with a fixed-size stack
+        while (true) {
+            const b = halfedges[a];
+
+            /* if the pair of triangles doesn't satisfy the Delaunay condition
+             * (p1 is inside the circumcircle of [p0, pl, pr]), flip them,
+             * then do the same check/flip recursively for the new pair of triangles
+             *
+             *           pl                    pl
+             *          /||\                  /  \
+             *       al/ || \bl            al/    \a
+             *        /  ||  \              /      \
+             *       /  a||b  \    flip    /___ar___\
+             *     p0\   ||   /p1   =>   p0\---bl---/p1
+             *        \  ||  /              \      /
+             *       ar\ || /br             b\    /br
+             *          \||/                  \  /
+             *           pr                    pr
+             */
+            const a0 = a - a % 3;
+            ar = a0 + (a + 2) % 3;
+
+            if (b === -1) { // convex hull edge
+                if (i === 0) break;
+                a = EDGE_STACK[--i];
+                continue;
+            }
+
+            const b0 = b - b % 3;
+            const al = a0 + (a + 1) % 3;
+            const bl = b0 + (b + 2) % 3;
+
+            const p0 = triangles[ar];
+            const pr = triangles[a];
+            const pl = triangles[al];
+            const p1 = triangles[bl];
+
+            const illegal = inCircle(
+                coords[2 * p0], coords[2 * p0 + 1],
+                coords[2 * pr], coords[2 * pr + 1],
+                coords[2 * pl], coords[2 * pl + 1],
+                coords[2 * p1], coords[2 * p1 + 1]);
+
+            if (illegal) {
+                triangles[a] = p1;
+                triangles[b] = p0;
+
+                const hbl = halfedges[bl];
+
+                // edge swapped on the other side of the hull (rare); fix the half-edge reference
+                if (hbl === -1) {
+                    let e = this._hullStart;
+                    do {
+                        if (this._hullTri[e] === bl) {
+                            this._hullTri[e] = a;
+                            break;
+                        }
+                        e = this._hullPrev[e];
+                    } while (e !== this._hullStart);
+                }
+                this._link(a, hbl);
+                this._link(b, halfedges[ar]);
+                this._link(ar, bl);
+
+                const br = b0 + (b + 1) % 3;
+
+                // don't worry about hitting the cap: it can only happen on extremely degenerate input
+                if (i < EDGE_STACK.length) {
+                    EDGE_STACK[i++] = br;
+                }
+            } else {
+                if (i === 0) break;
+                a = EDGE_STACK[--i];
+            }
+        }
+
+        return ar;
+    }
+
+    /**
+     * Link two half-edges to each other.
+     * @param {number} a
+     * @param {number} b
+     * @private
+     */
+    _link(a, b) {
+        this._halfedges[a] = b;
+        if (b !== -1) this._halfedges[b] = a;
+    }
+
+    /**
+     * Add a new triangle given vertex indices and adjacent half-edge ids.
+     *
+     * @param {number} i0
+     * @param {number} i1
+     * @param {number} i2
+     * @param {number} a
+     * @param {number} b
+     * @param {number} c
+     * @private
+     */
+    _addTriangle(i0, i1, i2, a, b, c) {
+        const t = this.trianglesLen;
+
+        this._triangles[t] = i0;
+        this._triangles[t + 1] = i1;
+        this._triangles[t + 2] = i2;
+
+        this._link(t, a);
+        this._link(t + 1, b);
+        this._link(t + 2, c);
+
+        this.trianglesLen += 3;
+
+        return t;
+    }
+}
+
+/**
+ * Monotonically increases with real angle, but doesn't need expensive trigonometry.
+ *
+ * @param {number} dx
+ * @param {number} dy
+ */
+function pseudoAngle(dx, dy) {
+    const p = dx / (Math.abs(dx) + Math.abs(dy));
+    return (dy > 0 ? 3 - p : 1 + p) / 4; // [0..1]
+}
+
+/**
+ * Squared distance between two points.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ */
+function dist(ax, ay, bx, by) {
+    const dx = ax - bx;
+    const dy = ay - by;
+    return dx * dx + dy * dy;
+}
+
+/**
+ * Check whether point P is inside a circle formed by points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ * @param {number} px
+ * @param {number} py
+ */
+function inCircle(ax, ay, bx, by, cx, cy, px, py) {
+    const dx = ax - px;
+    const dy = ay - py;
+    const ex = bx - px;
+    const ey = by - py;
+    const fx = cx - px;
+    const fy = cy - py;
+
+    const ap = dx * dx + dy * dy;
+    const bp = ex * ex + ey * ey;
+    const cp = fx * fx + fy * fy;
+
+    return dx * (ey * cp - bp * fy) -
+           dy * (ex * cp - bp * fx) +
+           ap * (ex * fy - ey * fx) < 0;
+}
+
+/**
+ * Squared radius of the circle formed by points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ */
+function circumradius(ax, ay, bx, by, cx, cy) {
+    const dx = bx - ax;
+    const dy = by - ay;
+    const ex = cx - ax;
+    const ey = cy - ay;
+
+    const bl = dx * dx + dy * dy;
+    const cl = ex * ex + ey * ey;
+    const d = 0.5 / (dx * ey - dy * ex);
+
+    const x = (ey * bl - dy * cl) * d;
+    const y = (dx * cl - ex * bl) * d;
+
+    return x * x + y * y;
+}
+
+/**
+ * Get coordinates of a circumcenter for points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ */
+function circumcenter(ax, ay, bx, by, cx, cy) {
+    const dx = bx - ax;
+    const dy = by - ay;
+    const ex = cx - ax;
+    const ey = cy - ay;
+
+    const bl = dx * dx + dy * dy;
+    const cl = ex * ex + ey * ey;
+    const d = 0.5 / (dx * ey - dy * ex);
+
+    const x = ax + (ey * bl - dy * cl) * d;
+    const y = ay + (dx * cl - ex * bl) * d;
+
+    return {x, y};
+}
+
+/**
+ * Sort points by distance via an array of point indices and an array of calculated distances.
+ *
+ * @param {Uint32Array} ids
+ * @param {Float64Array} dists
+ * @param {number} left
+ * @param {number} right
+ */
+function quicksort(ids, dists, left, right) {
+    if (right - left <= 20) {
+        for (let i = left + 1; i <= right; i++) {
+            const temp = ids[i];
+            const tempDist = dists[temp];
+            let j = i - 1;
+            while (j >= left && dists[ids[j]] > tempDist) ids[j + 1] = ids[j--];
+            ids[j + 1] = temp;
+        }
+    } else {
+        const median = (left + right) >> 1;
+        let i = left + 1;
+        let j = right;
+        swap(ids, median, i);
+        if (dists[ids[left]] > dists[ids[right]]) swap(ids, left, right);
+        if (dists[ids[i]] > dists[ids[right]]) swap(ids, i, right);
+        if (dists[ids[left]] > dists[ids[i]]) swap(ids, left, i);
+
+        const temp = ids[i];
+        const tempDist = dists[temp];
+        while (true) {
+            do i++; while (dists[ids[i]] < tempDist);
+            do j--; while (dists[ids[j]] > tempDist);
+            if (j < i) break;
+            swap(ids, i, j);
+        }
+        ids[left + 1] = ids[j];
+        ids[j] = temp;
+
+        if (right - i + 1 >= j - left) {
+            quicksort(ids, dists, i, right);
+            quicksort(ids, dists, left, j - 1);
+        } else {
+            quicksort(ids, dists, left, j - 1);
+            quicksort(ids, dists, i, right);
+        }
+    }
+}
+
+/**
+ * @param {Uint32Array} arr
+ * @param {number} i
+ * @param {number} j
+ */
+function swap(arr, i, j) {
+    const tmp = arr[i];
+    arr[i] = arr[j];
+    arr[j] = tmp;
+}
+
+/** @param {[number, number]} p */
+function defaultGetX(p) {
+    return p[0];
+}
+/** @param {[number, number]} p */
+function defaultGetY(p) {
+    return p[1];
+}
+
+return Delaunator;
+
+}));

node_modules/delaunator/index.d.ts

@@ -0,0 +1,83 @@
+/** @template {ArrayLike<number>} T */
+export default class Delaunator<T extends ArrayLike<number>> {
+    /**
+     * Constructs a delaunay triangulation object given an array of points (`[x, y]` by default).
+     * `getX` and `getY` are optional functions of the form `(point) => value` for custom point formats.
+     *
+     * @template P
+     * @param {P[]} points
+     * @param {(p: P) => number} [getX]
+     * @param {(p: P) => number} [getY]
+     */
+    static from<P>(points: P[], getX?: (p: P) => number, getY?: (p: P) => number): Delaunator<Float64Array<ArrayBuffer>>;
+    /**
+     * Constructs a delaunay triangulation object given an array of point coordinates of the form:
+     * `[x0, y0, x1, y1, ...]` (use a typed array for best performance). Duplicate points are skipped.
+     *
+     * @param {T} coords
+     */
+    constructor(coords: T);
+    coords: T;
+    /** @private */ private _triangles;
+    /** @private */ private _halfedges;
+    /** @private */ private _hashSize;
+    /** @private */ private _hullPrev;
+    /** @private */ private _hullNext;
+    /** @private */ private _hullTri;
+    /** @private */ private _hullHash;
+    /** @private */ private _ids;
+    /** @private */ private _dists;
+    /** @private */ private trianglesLen;
+    /** @private */ private _cx;
+    /** @private */ private _cy;
+    /** @private */ private _hullStart;
+    /** A `Uint32Array` array of indices that reference points on the convex hull of the input data, counter-clockwise. */
+    hull: Uint32Array<ArrayBuffer>;
+    /** A `Uint32Array` array of triangle vertex indices (each group of three numbers forms a triangle). All triangles are directed counterclockwise. */
+    triangles: Uint32Array<ArrayBuffer>;
+    /**
+     * A `Int32Array` array of triangle half-edge indices that allows you to traverse the triangulation.
+     * `i`-th half-edge in the array corresponds to vertex `triangles[i]` the half-edge is coming from.
+     * `halfedges[i]` is the index of a twin half-edge in an adjacent triangle (or `-1` for outer half-edges on the convex hull).
+     */
+    halfedges: Int32Array<ArrayBuffer>;
+    /**
+     * Updates the triangulation if you modified `delaunay.coords` values in place, avoiding expensive memory allocations.
+     * Useful for iterative relaxation algorithms such as Lloyd's.
+     */
+    update(): void;
+    /**
+     * Calculate an angle-based key for the edge hash used for advancing convex hull.
+     *
+     * @param {number} x
+     * @param {number} y
+     * @private
+     */
+    private _hashKey;
+    /**
+     * Flip an edge in a pair of triangles if it doesn't satisfy the Delaunay condition.
+     *
+     * @param {number} a
+     * @private
+     */
+    private _legalize;
+    /**
+     * Link two half-edges to each other.
+     * @param {number} a
+     * @param {number} b
+     * @private
+     */
+    private _link;
+    /**
+     * Add a new triangle given vertex indices and adjacent half-edge ids.
+     *
+     * @param {number} i0
+     * @param {number} i1
+     * @param {number} i2
+     * @param {number} a
+     * @param {number} b
+     * @param {number} c
+     * @private
+     */
+    private _addTriangle;
+}

node_modules/delaunator/index.js

@@ -0,0 +1,607 @@
+
+const EPSILON = Math.pow(2, -52);
+const EDGE_STACK = new Uint32Array(512);
+
+import {orient2d} from 'robust-predicates';
+
+/** @template {ArrayLike<number>} T */
+export default class Delaunator {
+
+    /**
+     * Constructs a delaunay triangulation object given an array of points (`[x, y]` by default).
+     * `getX` and `getY` are optional functions of the form `(point) => value` for custom point formats.
+     *
+     * @template P
+     * @param {P[]} points
+     * @param {(p: P) => number} [getX]
+     * @param {(p: P) => number} [getY]
+     */
+    // @ts-expect-error TS2322
+    static from(points, getX = defaultGetX, getY = defaultGetY) {
+        const n = points.length;
+        const coords = new Float64Array(n * 2);
+
+        for (let i = 0; i < n; i++) {
+            const p = points[i];
+            coords[2 * i] = getX(p);
+            coords[2 * i + 1] = getY(p);
+        }
+
+        return new Delaunator(coords);
+    }
+
+    /**
+     * Constructs a delaunay triangulation object given an array of point coordinates of the form:
+     * `[x0, y0, x1, y1, ...]` (use a typed array for best performance). Duplicate points are skipped.
+     *
+     * @param {T} coords
+     */
+    constructor(coords) {
+        const n = coords.length >> 1;
+        if (n > 0 && typeof coords[0] !== 'number') throw new Error('Expected coords to contain numbers.');
+
+        this.coords = coords;
+
+        // arrays that will store the triangulation graph
+        const maxTriangles = Math.max(2 * n - 5, 0);
+        /** @private */ this._triangles = new Uint32Array(maxTriangles * 3);
+        /** @private */ this._halfedges = new Int32Array(maxTriangles * 3);
+
+        // temporary arrays for tracking the edges of the advancing convex hull
+        /** @private */ this._hashSize = Math.ceil(Math.sqrt(n));
+        /** @private */ this._hullPrev = new Uint32Array(n); // edge to prev edge
+        /** @private */ this._hullNext = new Uint32Array(n); // edge to next edge
+        /** @private */ this._hullTri = new Uint32Array(n); // edge to adjacent triangle
+        /** @private */ this._hullHash = new Int32Array(this._hashSize); // angular edge hash
+
+        // temporary arrays for sorting points
+        /** @private */ this._ids = new Uint32Array(n);
+        /** @private */ this._dists = new Float64Array(n);
+
+        /** @private */ this.trianglesLen = 0;
+        /** @private */ this._cx = 0;
+        /** @private */ this._cy = 0;
+        /** @private */ this._hullStart = 0;
+
+
+        /** A `Uint32Array` array of indices that reference points on the convex hull of the input data, counter-clockwise. */
+        this.hull = this._triangles;
+        /** A `Uint32Array` array of triangle vertex indices (each group of three numbers forms a triangle). All triangles are directed counterclockwise. */
+        this.triangles = this._triangles;
+        /**
+         * A `Int32Array` array of triangle half-edge indices that allows you to traverse the triangulation.
+         * `i`-th half-edge in the array corresponds to vertex `triangles[i]` the half-edge is coming from.
+         * `halfedges[i]` is the index of a twin half-edge in an adjacent triangle (or `-1` for outer half-edges on the convex hull).
+         */
+        this.halfedges = this._halfedges;
+
+        this.update();
+    }
+
+    /**
+     * Updates the triangulation if you modified `delaunay.coords` values in place, avoiding expensive memory allocations.
+     * Useful for iterative relaxation algorithms such as Lloyd's.
+     */
+    update() {
+        const {coords, _hullPrev: hullPrev, _hullNext: hullNext, _hullTri: hullTri, _hullHash: hullHash} =  this;
+        const n = coords.length >> 1;
+
+        // populate an array of point indices; calculate input data bbox
+        let minX = Infinity;
+        let minY = Infinity;
+        let maxX = -Infinity;
+        let maxY = -Infinity;
+
+        for (let i = 0; i < n; i++) {
+            const x = coords[2 * i];
+            const y = coords[2 * i + 1];
+            if (x < minX) minX = x;
+            if (y < minY) minY = y;
+            if (x > maxX) maxX = x;
+            if (y > maxY) maxY = y;
+            this._ids[i] = i;
+        }
+        const cx = (minX + maxX) / 2;
+        const cy = (minY + maxY) / 2;
+
+        let i0 = 0, i1 = 0, i2 = 0;
+
+        // pick a seed point close to the center
+        for (let i = 0, minDist = Infinity; i < n; i++) {
+            const d = dist(cx, cy, coords[2 * i], coords[2 * i + 1]);
+            if (d < minDist) {
+                i0 = i;
+                minDist = d;
+            }
+        }
+        const i0x = coords[2 * i0];
+        const i0y = coords[2 * i0 + 1];
+
+        // find the point closest to the seed
+        for (let i = 0, minDist = Infinity; i < n; i++) {
+            if (i === i0) continue;
+            const d = dist(i0x, i0y, coords[2 * i], coords[2 * i + 1]);
+            if (d < minDist && d > 0) {
+                i1 = i;
+                minDist = d;
+            }
+        }
+        let i1x = coords[2 * i1];
+        let i1y = coords[2 * i1 + 1];
+
+        let minRadius = Infinity;
+
+        // find the third point which forms the smallest circumcircle with the first two
+        for (let i = 0; i < n; i++) {
+            if (i === i0 || i === i1) continue;
+            const r = circumradius(i0x, i0y, i1x, i1y, coords[2 * i], coords[2 * i + 1]);
+            if (r < minRadius) {
+                i2 = i;
+                minRadius = r;
+            }
+        }
+        let i2x = coords[2 * i2];
+        let i2y = coords[2 * i2 + 1];
+
+        if (minRadius === Infinity) {
+            // order collinear points by dx (or dy if all x are identical)
+            // and return the list as a hull
+            for (let i = 0; i < n; i++) {
+                this._dists[i] = (coords[2 * i] - coords[0]) || (coords[2 * i + 1] - coords[1]);
+            }
+            quicksort(this._ids, this._dists, 0, n - 1);
+            const hull = new Uint32Array(n);
+            let j = 0;
+            for (let i = 0, d0 = -Infinity; i < n; i++) {
+                const id = this._ids[i];
+                const d = this._dists[id];
+                if (d > d0) {
+                    hull[j++] = id;
+                    d0 = d;
+                }
+            }
+            this.hull = hull.subarray(0, j);
+            this.triangles = new Uint32Array(0);
+            this.halfedges = new Int32Array(0);
+            return;
+        }
+
+        // swap the order of the seed points for counter-clockwise orientation
+        if (orient2d(i0x, i0y, i1x, i1y, i2x, i2y) < 0) {
+            const i = i1;
+            const x = i1x;
+            const y = i1y;
+            i1 = i2;
+            i1x = i2x;
+            i1y = i2y;
+            i2 = i;
+            i2x = x;
+            i2y = y;
+        }
+
+        const center = circumcenter(i0x, i0y, i1x, i1y, i2x, i2y);
+        this._cx = center.x;
+        this._cy = center.y;
+
+        for (let i = 0; i < n; i++) {
+            this._dists[i] = dist(coords[2 * i], coords[2 * i + 1], center.x, center.y);
+        }
+
+        // sort the points by distance from the seed triangle circumcenter
+        quicksort(this._ids, this._dists, 0, n - 1);
+
+        // set up the seed triangle as the starting hull
+        this._hullStart = i0;
+        let hullSize = 3;
+
+        hullNext[i0] = hullPrev[i2] = i1;
+        hullNext[i1] = hullPrev[i0] = i2;
+        hullNext[i2] = hullPrev[i1] = i0;
+
+        hullTri[i0] = 0;
+        hullTri[i1] = 1;
+        hullTri[i2] = 2;
+
+        hullHash.fill(-1);
+        hullHash[this._hashKey(i0x, i0y)] = i0;
+        hullHash[this._hashKey(i1x, i1y)] = i1;
+        hullHash[this._hashKey(i2x, i2y)] = i2;
+
+        this.trianglesLen = 0;
+        this._addTriangle(i0, i1, i2, -1, -1, -1);
+
+        for (let k = 0, xp = 0, yp = 0; k < this._ids.length; k++) {
+            const i = this._ids[k];
+            const x = coords[2 * i];
+            const y = coords[2 * i + 1];
+
+            // skip near-duplicate points
+            if (k > 0 && Math.abs(x - xp) <= EPSILON && Math.abs(y - yp) <= EPSILON) continue;
+            xp = x;
+            yp = y;
+
+            // skip seed triangle points
+            if (i === i0 || i === i1 || i === i2) continue;
+
+            // find a visible edge on the convex hull using edge hash
+            let start = 0;
+            for (let j = 0, key = this._hashKey(x, y); j < this._hashSize; j++) {
+                start = hullHash[(key + j) % this._hashSize];
+                if (start !== -1 && start !== hullNext[start]) break;
+            }
+
+            start = hullPrev[start];
+            let e = start, q;
+            while (q = hullNext[e], orient2d(x, y, coords[2 * e], coords[2 * e + 1], coords[2 * q], coords[2 * q + 1]) >= 0) {
+                e = q;
+                if (e === start) {
+                    e = -1;
+                    break;
+                }
+            }
+            if (e === -1) continue; // likely a near-duplicate point; skip it
+
+            // add the first triangle from the point
+            let t = this._addTriangle(e, i, hullNext[e], -1, -1, hullTri[e]);
+
+            // recursively flip triangles from the point until they satisfy the Delaunay condition
+            hullTri[i] = this._legalize(t + 2);
+            hullTri[e] = t; // keep track of boundary triangles on the hull
+            hullSize++;
+
+            // walk forward through the hull, adding more triangles and flipping recursively
+            let n = hullNext[e];
+            while (q = hullNext[n], orient2d(x, y, coords[2 * n], coords[2 * n + 1], coords[2 * q], coords[2 * q + 1]) < 0) {
+                t = this._addTriangle(n, i, q, hullTri[i], -1, hullTri[n]);
+                hullTri[i] = this._legalize(t + 2);
+                hullNext[n] = n; // mark as removed
+                hullSize--;
+                n = q;
+            }
+
+            // walk backward from the other side, adding more triangles and flipping
+            if (e === start) {
+                while (q = hullPrev[e], orient2d(x, y, coords[2 * q], coords[2 * q + 1], coords[2 * e], coords[2 * e + 1]) < 0) {
+                    t = this._addTriangle(q, i, e, -1, hullTri[e], hullTri[q]);
+                    this._legalize(t + 2);
+                    hullTri[q] = t;
+                    hullNext[e] = e; // mark as removed
+                    hullSize--;
+                    e = q;
+                }
+            }
+
+            // update the hull indices
+            this._hullStart = hullPrev[i] = e;
+            hullNext[e] = hullPrev[n] = i;
+            hullNext[i] = n;
+
+            // save the two new edges in the hash table
+            hullHash[this._hashKey(x, y)] = i;
+            hullHash[this._hashKey(coords[2 * e], coords[2 * e + 1])] = e;
+        }
+
+        this.hull = new Uint32Array(hullSize);
+        for (let i = 0, e = this._hullStart; i < hullSize; i++) {
+            this.hull[i] = e;
+            e = hullNext[e];
+        }
+
+        // trim typed triangle mesh arrays
+        this.triangles = this._triangles.subarray(0, this.trianglesLen);
+        this.halfedges = this._halfedges.subarray(0, this.trianglesLen);
+    }
+
+    /**
+     * Calculate an angle-based key for the edge hash used for advancing convex hull.
+     *
+     * @param {number} x
+     * @param {number} y
+     * @private
+     */
+    _hashKey(x, y) {
+        return Math.floor(pseudoAngle(x - this._cx, y - this._cy) * this._hashSize) % this._hashSize;
+    }
+
+    /**
+     * Flip an edge in a pair of triangles if it doesn't satisfy the Delaunay condition.
+     *
+     * @param {number} a
+     * @private
+     */
+    _legalize(a) {
+        const {_triangles: triangles, _halfedges: halfedges, coords} = this;
+
+        let i = 0;
+        let ar = 0;
+
+        // recursion eliminated with a fixed-size stack
+        while (true) {
+            const b = halfedges[a];
+
+            /* if the pair of triangles doesn't satisfy the Delaunay condition
+             * (p1 is inside the circumcircle of [p0, pl, pr]), flip them,
+             * then do the same check/flip recursively for the new pair of triangles
+             *
+             *           pl                    pl
+             *          /||\                  /  \
+             *       al/ || \bl            al/    \a
+             *        /  ||  \              /      \
+             *       /  a||b  \    flip    /___ar___\
+             *     p0\   ||   /p1   =>   p0\---bl---/p1
+             *        \  ||  /              \      /
+             *       ar\ || /br             b\    /br
+             *          \||/                  \  /
+             *           pr                    pr
+             */
+            const a0 = a - a % 3;
+            ar = a0 + (a + 2) % 3;
+
+            if (b === -1) { // convex hull edge
+                if (i === 0) break;
+                a = EDGE_STACK[--i];
+                continue;
+            }
+
+            const b0 = b - b % 3;
+            const al = a0 + (a + 1) % 3;
+            const bl = b0 + (b + 2) % 3;
+
+            const p0 = triangles[ar];
+            const pr = triangles[a];
+            const pl = triangles[al];
+            const p1 = triangles[bl];
+
+            const illegal = inCircle(
+                coords[2 * p0], coords[2 * p0 + 1],
+                coords[2 * pr], coords[2 * pr + 1],
+                coords[2 * pl], coords[2 * pl + 1],
+                coords[2 * p1], coords[2 * p1 + 1]);
+
+            if (illegal) {
+                triangles[a] = p1;
+                triangles[b] = p0;
+
+                const hbl = halfedges[bl];
+
+                // edge swapped on the other side of the hull (rare); fix the half-edge reference
+                if (hbl === -1) {
+                    let e = this._hullStart;
+                    do {
+                        if (this._hullTri[e] === bl) {
+                            this._hullTri[e] = a;
+                            break;
+                        }
+                        e = this._hullPrev[e];
+                    } while (e !== this._hullStart);
+                }
+                this._link(a, hbl);
+                this._link(b, halfedges[ar]);
+                this._link(ar, bl);
+
+                const br = b0 + (b + 1) % 3;
+
+                // don't worry about hitting the cap: it can only happen on extremely degenerate input
+                if (i < EDGE_STACK.length) {
+                    EDGE_STACK[i++] = br;
+                }
+            } else {
+                if (i === 0) break;
+                a = EDGE_STACK[--i];
+            }
+        }
+
+        return ar;
+    }
+
+    /**
+     * Link two half-edges to each other.
+     * @param {number} a
+     * @param {number} b
+     * @private
+     */
+    _link(a, b) {
+        this._halfedges[a] = b;
+        if (b !== -1) this._halfedges[b] = a;
+    }
+
+    /**
+     * Add a new triangle given vertex indices and adjacent half-edge ids.
+     *
+     * @param {number} i0
+     * @param {number} i1
+     * @param {number} i2
+     * @param {number} a
+     * @param {number} b
+     * @param {number} c
+     * @private
+     */
+    _addTriangle(i0, i1, i2, a, b, c) {
+        const t = this.trianglesLen;
+
+        this._triangles[t] = i0;
+        this._triangles[t + 1] = i1;
+        this._triangles[t + 2] = i2;
+
+        this._link(t, a);
+        this._link(t + 1, b);
+        this._link(t + 2, c);
+
+        this.trianglesLen += 3;
+
+        return t;
+    }
+}
+
+/**
+ * Monotonically increases with real angle, but doesn't need expensive trigonometry.
+ *
+ * @param {number} dx
+ * @param {number} dy
+ */
+function pseudoAngle(dx, dy) {
+    const p = dx / (Math.abs(dx) + Math.abs(dy));
+    return (dy > 0 ? 3 - p : 1 + p) / 4; // [0..1]
+}
+
+/**
+ * Squared distance between two points.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ */
+function dist(ax, ay, bx, by) {
+    const dx = ax - bx;
+    const dy = ay - by;
+    return dx * dx + dy * dy;
+}
+
+/**
+ * Check whether point P is inside a circle formed by points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ * @param {number} px
+ * @param {number} py
+ */
+function inCircle(ax, ay, bx, by, cx, cy, px, py) {
+    const dx = ax - px;
+    const dy = ay - py;
+    const ex = bx - px;
+    const ey = by - py;
+    const fx = cx - px;
+    const fy = cy - py;
+
+    const ap = dx * dx + dy * dy;
+    const bp = ex * ex + ey * ey;
+    const cp = fx * fx + fy * fy;
+
+    return dx * (ey * cp - bp * fy) -
+           dy * (ex * cp - bp * fx) +
+           ap * (ex * fy - ey * fx) < 0;
+}
+
+/**
+ * Squared radius of the circle formed by points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ */
+function circumradius(ax, ay, bx, by, cx, cy) {
+    const dx = bx - ax;
+    const dy = by - ay;
+    const ex = cx - ax;
+    const ey = cy - ay;
+
+    const bl = dx * dx + dy * dy;
+    const cl = ex * ex + ey * ey;
+    const d = 0.5 / (dx * ey - dy * ex);
+
+    const x = (ey * bl - dy * cl) * d;
+    const y = (dx * cl - ex * bl) * d;
+
+    return x * x + y * y;
+}
+
+/**
+ * Get coordinates of a circumcenter for points A, B, C.
+ *
+ * @param {number} ax
+ * @param {number} ay
+ * @param {number} bx
+ * @param {number} by
+ * @param {number} cx
+ * @param {number} cy
+ */
+function circumcenter(ax, ay, bx, by, cx, cy) {
+    const dx = bx - ax;
+    const dy = by - ay;
+    const ex = cx - ax;
+    const ey = cy - ay;
+
+    const bl = dx * dx + dy * dy;
+    const cl = ex * ex + ey * ey;
+    const d = 0.5 / (dx * ey - dy * ex);
+
+    const x = ax + (ey * bl - dy * cl) * d;
+    const y = ay + (dx * cl - ex * bl) * d;
+
+    return {x, y};
+}
+
+/**
+ * Sort points by distance via an array of point indices and an array of calculated distances.
+ *
+ * @param {Uint32Array} ids
+ * @param {Float64Array} dists
+ * @param {number} left
+ * @param {number} right
+ */
+function quicksort(ids, dists, left, right) {
+    if (right - left <= 20) {
+        for (let i = left + 1; i <= right; i++) {
+            const temp = ids[i];
+            const tempDist = dists[temp];
+            let j = i - 1;
+            while (j >= left && dists[ids[j]] > tempDist) ids[j + 1] = ids[j--];
+            ids[j + 1] = temp;
+        }
+    } else {
+        const median = (left + right) >> 1;
+        let i = left + 1;
+        let j = right;
+        swap(ids, median, i);
+        if (dists[ids[left]] > dists[ids[right]]) swap(ids, left, right);
+        if (dists[ids[i]] > dists[ids[right]]) swap(ids, i, right);
+        if (dists[ids[left]] > dists[ids[i]]) swap(ids, left, i);
+
+        const temp = ids[i];
+        const tempDist = dists[temp];
+        while (true) {
+            do i++; while (dists[ids[i]] < tempDist);
+            do j--; while (dists[ids[j]] > tempDist);
+            if (j < i) break;
+            swap(ids, i, j);
+        }
+        ids[left + 1] = ids[j];
+        ids[j] = temp;
+
+        if (right - i + 1 >= j - left) {
+            quicksort(ids, dists, i, right);
+            quicksort(ids, dists, left, j - 1);
+        } else {
+            quicksort(ids, dists, left, j - 1);
+            quicksort(ids, dists, i, right);
+        }
+    }
+}
+
+/**
+ * @param {Uint32Array} arr
+ * @param {number} i
+ * @param {number} j
+ */
+function swap(arr, i, j) {
+    const tmp = arr[i];
+    arr[i] = arr[j];
+    arr[j] = tmp;
+}
+
+/** @param {[number, number]} p */
+function defaultGetX(p) {
+    return p[0];
+}
+/** @param {[number, number]} p */
+function defaultGetY(p) {
+    return p[1];
+}

node_modules/delaunator/package.json

@@ -0,0 +1,50 @@
+{
+  "name": "delaunator",
+  "version": "5.1.0",
+  "description": "An incredibly fast JavaScript library for Delaunay triangulation of 2D points",
+  "main": "index.js",
+  "module": "index.js",
+  "type": "module",
+  "types": "index.d.ts",
+  "jsdelivr": "delaunator.min.js",
+  "unpkg": "delaunator.min.js",
+  "sideEffects": false,
+  "dependencies": {
+    "robust-predicates": "^3.0.2"
+  },
+  "devDependencies": {
+    "@rollup/plugin-node-resolve": "^16.0.3",
+    "@rollup/plugin-terser": "^1.0.0",
+    "eslint": "^10.1.0",
+    "eslint-config-mourner": "^4.1.0",
+    "rollup": "^4.59.1",
+    "typescript": "^5.9.3"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mapbox/delaunator.git"
+  },
+  "scripts": {
+    "lint": "eslint index.js test/test.js bench.js rollup.config.js docs/diagrams.js",
+    "pretest": "npm run lint",
+    "test": "tsc && node test/test.js",
+    "cov": "node --experimental-test-coverage test/test.js",
+    "bench": "node bench.js",
+    "build": "rollup -c",
+    "start": "rollup -cw",
+    "prepublishOnly": "npm test && npm run build"
+  },
+  "files": [
+    "index.js",
+    "index.d.ts",
+    "delaunator.js",
+    "delaunator.min.js"
+  ],
+  "keywords": [
+    "delaunay triangulation",
+    "computational geometry",
+    "algorithms"
+  ],
+  "author": "Vladimir Agafonkin",
+  "license": "ISC"
+}