Fixed order of computeFields recomputations; fixes #124 (#125)

Co-authored-by: Alexander Milevski <[email protected]>

src/subdivide_segments.js

@@ -41,7 +41,7 @@ export default function subdivide(eventQueue, subject, clipping, sbbox, cbbox, o
       if (next) {
         if (possibleIntersection(event, next.key, eventQueue) === 2) {
           computeFields(event, prevEvent, operation);
-          computeFields(event, next.key, operation);
+          computeFields(next.key, event, operation);
         }
       }
 

test/genericTestCases/issue124.geojson

@@ -0,0 +1,32 @@
+{
+  "features": [
+    {
+      "geometry": {
+        "coordinates": [[[0, 10], [0, -10], [30, -10], [30, 10], [0, 10]]],
+        "type": "Polygon"
+      },
+      "properties": {},
+      "type": "Feature"
+    },
+    {
+      "geometry": {
+        "coordinates": [[[10, 10], [10, -10], [20, -10], [20, 10], [10, 10]]],
+        "type": "Polygon"
+      },
+      "properties": {},
+      "type": "Feature"
+    },
+    {
+      "geometry": {
+        "coordinates": [
+          [[[0, -10], [10, -10], [10, 10], [0, 10], [0, -10]]],
+          [[[20, -10], [30, -10], [30, 10], [20, 10], [20, -10]]]
+        ],
+        "type": "MultiPolygon"
+      },
+      "properties": {"operation": "diff"},
+      "type": "Feature"
+    }
+  ],
+  "type": "FeatureCollection"
+}