- Add test case issue #11

alexbol99 · Jun 12, 2021 · d7c637d · d7c637d
1 parent 8a7aa40
commit d7c637d
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Showing 3 changed files with 127 additions and 22 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -42,9 +42,10 @@
     "node": ">=4.2.4"
   },
   "dependencies": {
+
   },
   "peerDependencies": {
-    "@flatten-js/core": "^1.2.16"
+    "@flatten-js/core": "^1.2.23"
   },
   "devDependencies": {
     "@babel/cli": "^7.2.3",

diff --git a/test/test.js b/test/test.js
@@ -226,5 +226,88 @@ describe('#Algorithms.Offset Polygon', function () {
 
         expect(offsetPolygon.faces.size).to.be.equal(1);
         expect(offsetPolygon.edges.size).to.be.equal(8);
-    })
+    });
+    it('Offset sometimes not working Issue #11', () => {
+        let points = [
+            [554.4, 420.1],
+            [637.3, 414.7],
+            [710.3, 411.7],
+            [746.5, 408.9],
+            [782.5, 404.1],
+            [808.1, 398],
+            [833.2, 390.2],
+            [857.7, 381],
+            [881.6, 370.2],
+            [903.4, 358.1],
+            [924.3, 344.6],
+            [944.4, 330],
+            [963.8, 314.3],
+            [992.6, 286.4],
+            [1019, 256.1],
+            [1036.8, 233.7],
+            [1053, 210.2],
+            [1065.6, 188.6],
+            [1077, 166.4],
+            [1108.7, 95.7],
+            [872.4, 0],
+            [845.2, 48],
+            [833.4, 66.9],
+            [820.3, 84.9],
+            [801.9, 104.7],
+            [781.4, 122.6],
+            [766.8, 132.7],
+            [751.4, 141.1],
+            [733.1, 149.2],
+            [714, 155],
+            [690.1, 158.5],
+            [666, 160.2],
+            [617.5, 161.4],
+            [554.4, 162.3],
+            [491.2, 161.4],
+            [442.8, 160.2],
+            [418.7, 158.5],
+            [394.8, 155],
+            [375.6, 149.2],
+            [357.3, 141.1],
+            [341.9, 132.7],
+            [327.3, 122.6],
+            [306.8, 104.7],
+            [288.4, 84.9],
+            [275.3, 66.9],
+            [263.5, 48],
+            [236.4, 0],
+            [0, 95.7],
+            [31.7, 166.4],
+            [43.1, 188.6],
+            [55.7, 210.2],
+            [71.9, 233.7],
+            [89.7, 256.1],
+            [116.2, 286.4],
+            [144.9, 314.3],
+            [164.3, 330],
+            [184.4, 344.6],
+            [205.3, 358.1],
+            [227.1, 370.2],
+            [251, 381],
+            [275.5, 390.2],
+            [300.7, 398],
+            [326.2, 404.1],
+            [362.2, 408.9],
+            [398.4, 411.7],
+            [471.4, 414.7]
+        ]
+
+        for (let scale = 0.3; scale <= 1; scale += 0.025) {
+            // const scale = 0.6;
+            const scaledPoints = points.map((pp) => [pp[0] * scale, pp[1] * scale]);
+
+            // Calculate offset.
+            const polygon = new Polygon(scaledPoints);
+
+            const offsetPolygon = offset(polygon, -3);
+
+            expect(offsetPolygon.faces.size).to.be.equal(1);
+        }
+
+    });
 });