earcut - npm Package Compare versions

Comparing version 3.2.2 to 3.2.3

dist/earcut.dev.js

@@ -912,3 +912,2 @@ (function (global, factory) {
     if (n < 6) return;
-    const V = coords.length / dim;
     ensureScratch(n);
@@ -927,3 +926,3 @@ gen++;              // bumping the generation logically empties the hash (no clearing)
         const lo = a < b ? a : b, hi = a < b ? b : a;
-        let h = ((hi * V + lo) * 0x9e3779b1 >>> 0) & hMask;
+        let h = (Math.imul(lo, 0x9e3779b1) ^ Math.imul(hi, 0x85ebca6b)) & hMask;
         while (hStamp[h] === gen) {
@@ -978,4 +977,4 @@ const s = hTable[h];
             // already queued (edgeStamp), which also keeps the stack bounded by n.
-            if (he[a]  !== -1 && edgeStamp[a]  === 0) { edgeStamp[a]  = 1; edgeStack[i++] = a; }
-            if (he[b]  !== -1 && edgeStamp[b]  === 0) { edgeStamp[b]  = 1; edgeStack[i++] = b; }
+            if (hbl    !== -1 && edgeStamp[a]  === 0) { edgeStamp[a]  = 1; edgeStack[i++] = a; }
+            if (har    !== -1 && edgeStamp[b]  === 0) { edgeStamp[b]  = 1; edgeStack[i++] = b; }
             if (he[al] !== -1 && edgeStamp[al] === 0) { edgeStamp[al] = 1; edgeStack[i++] = al; }
@@ -999,3 +998,9 @@ if (he[br] !== -1 && edgeStamp[br] === 0) { edgeStamp[br] = 1; edgeStack[i++] = br; }
     const ap = dx * dx + dy * dy, bp = ex * ex + ey * ey, cp = fx * fx + fy * fy;
-    return dx * (ey * cp - bp * fy) - dy * (ex * cp - bp * fx) + ap * (ex * fy - ey * fx) <= 0;
+    // A near-cocircular quad is a legal Delaunay tie, but roundoff can flag both an edge and its
+    // flip as illegal, cascading into an endless flip loop (#205) — so treat a determinant within
+    // a small margin of zero as a tie. The determinant's worst-case roundoff error is provably
+    // below 9e-16·(ap + bp + cp)² (Shewchuk-style bound), so the margin guarantees every executed
+    // flip is illegal in exact arithmetic, and Lawson flipping always terminates.
+    const s = ap + bp + cp;
+    return dx * (ey * cp - bp * fy) - dy * (ex * cp - bp * fx) + ap * (ex * fy - ey * fx) <= 1e-13 * s * s;
 }
@@ -1002,0 +1007,0 @@

dist/earcut.min.js

@@ -1,1 +0,1 @@
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package.json

 {
   "name": "earcut",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "The fastest and smallest JavaScript polygon triangulation library for your WebGL apps",
@@ -5,0 +5,0 @@ "main": "src/earcut.js",

README.md

@@ -22,3 +22,3 @@ # Earcut
 import earcut from 'earcut';
-const triangles = earcut([10,0, 0,50, 60,60, 70,10]); // returns [1,0,3, 3,2,1]
+const triangles = earcut([10,0, 0,50, 60,60, 70,10]); // returns [1,0,3, 1,3,2]
 ```
@@ -29,3 +29,3 @@
 The library implements a modified ear slicing algorithm,
-optimized by [z-order curve](http://en.wikipedia.org/wiki/Z-order_curve) and spatial hashing
+optimized by [z-order curve](https://en.wikipedia.org/wiki/Z-order_curve) and spatial hashing
 and extended to handle holes, twisted polygons, degeneracies and self-intersections
@@ -36,4 +36,4 @@ in a way that doesn't _guarantee_ correctness of triangulation,
 It's based on ideas from
-[FIST: Fast Industrial-Strength Triangulation of Polygons](http://www.cosy.sbg.ac.at/~held/projects/triang/triang.html) by Martin Held
-and [Triangulation by Ear Clipping](http://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf) by David Eberly.
+[FIST: Fast Industrial-Strength Triangulation of Polygons](https://www.cosy.sbg.ac.at/~held/projects/triang/triang.html) by Martin Held
+and [Triangulation by Ear Clipping](https://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf) by David Eberly.
 
@@ -45,4 +45,4 @@ ## Performance
 benchmark of **119,680 real-world polygons** (1.9M vertices) drawn from a window of map tiles
-through zooms 4–16, it triangulates the whole set in **~445 ms** on a Macbook Pro M1 Pro (2021),
-with optional Delaunay refinement taking additional **~176 ms**.
+through zooms 4–16, it triangulates the whole set in **~445 ms** on a MacBook Pro M1 Pro (2021),
+with optional Delaunay refinement taking additional **~168 ms**.
 You can run the benchmark yourself with `npm run bench`.
@@ -101,7 +101,7 @@
 earcut([0,0, 100,0, 100,100, 0,100,  20,20, 80,20, 80,80, 20,80], [4]);
-// [3,0,4, 5,4,0, 3,4,7, 5,0,1, 2,3,7, 6,5,1, 2,7,6, 6,1,2]
+// [0,4,7, 5,4,0, 5,0,1, 5,1,2, 3,0,7, 3,7,6, 6,5,2, 6,2,3]
 
 // triangulating a polygon with 3d coords
 earcut([10,0,1, 0,50,2, 60,60,3, 70,10,4], null, 3);
-// [1,0,3, 3,2,1]
+// [1,0,3, 1,3,2]
 ```
@@ -132,3 +132,3 @@
 
-If your input is a multi-dimensional array (e.g. [GeoJSON Polygon](http://geojson.org/geojson-spec.html#polygon)),
+If your input is a multi-dimensional array (e.g. [GeoJSON Polygon](https://geojson.org/geojson-spec.html#polygon)),
 you can convert it to the format expected by Earcut with `flatten`:
@@ -159,3 +159,3 @@
 - [measuredweighed/SwiftEarcut](https://github.com/measuredweighed/SwiftEarcut) (Swift)
-- [goswinr/Earcut](https://github.com/goswinr/Earcut/)(F# / .NET)
+- [goswinr/Earcut](https://github.com/goswinr/Earcut/) (F# / .NET)
 - [tenyoru/earcut.zig](https://github.com/tenyoru/earcut.zig) (Zig)

src/earcut.js

@@ -906,3 +906,2 @@ /**
     if (n < 6) return;
-    const V = coords.length / dim;
     ensureScratch(n);
@@ -921,3 +920,3 @@ gen++;              // bumping the generation logically empties the hash (no clearing)
         const lo = a < b ? a : b, hi = a < b ? b : a;
-        let h = ((hi * V + lo) * 0x9e3779b1 >>> 0) & hMask;
+        let h = (Math.imul(lo, 0x9e3779b1) ^ Math.imul(hi, 0x85ebca6b)) & hMask;
         while (hStamp[h] === gen) {
@@ -972,4 +971,4 @@ const s = hTable[h];
             // already queued (edgeStamp), which also keeps the stack bounded by n.
-            if (he[a]  !== -1 && edgeStamp[a]  === 0) { edgeStamp[a]  = 1; edgeStack[i++] = a; }
-            if (he[b]  !== -1 && edgeStamp[b]  === 0) { edgeStamp[b]  = 1; edgeStack[i++] = b; }
+            if (hbl    !== -1 && edgeStamp[a]  === 0) { edgeStamp[a]  = 1; edgeStack[i++] = a; }
+            if (har    !== -1 && edgeStamp[b]  === 0) { edgeStamp[b]  = 1; edgeStack[i++] = b; }
             if (he[al] !== -1 && edgeStamp[al] === 0) { edgeStamp[al] = 1; edgeStack[i++] = al; }
@@ -993,3 +992,9 @@ if (he[br] !== -1 && edgeStamp[br] === 0) { edgeStamp[br] = 1; edgeStack[i++] = br; }
     const ap = dx * dx + dy * dy, bp = ex * ex + ey * ey, cp = fx * fx + fy * fy;
-    return dx * (ey * cp - bp * fy) - dy * (ex * cp - bp * fx) + ap * (ex * fy - ey * fx) <= 0;
+    // A near-cocircular quad is a legal Delaunay tie, but roundoff can flag both an edge and its
+    // flip as illegal, cascading into an endless flip loop (#205) — so treat a determinant within
+    // a small margin of zero as a tie. The determinant's worst-case roundoff error is provably
+    // below 9e-16·(ap + bp + cp)² (Shewchuk-style bound), so the margin guarantees every executed
+    // flip is illegal in exact arithmetic, and Lawson flipping always terminates.
+    const s = ap + bp + cp;
+    return dx * (ey * cp - bp * fy) - dy * (ex * cp - bp * fx) + ap * (ex * fy - ey * fx) <= 1e-13 * s * s;
 }
@@ -996,0 +1001,0 @@

No alert changes

Improved metrics

Total package byte prevSize

107933

0.97%

Lines of code

1890

0.53%

No dependency changes