craigtaverner commented on code in PR #13980:
URL: https://github.com/apache/lucene/pull/13980#discussion_r1832435160
##########
lucene/core/src/java/org/apache/lucene/geo/Tessellator.java:
##########
@@ -390,12 +377,108 @@ private static final void eliminateHole(
}
}
+ /** Choose a common vertex between the polygon and the hole if it exists,
otherwise return null */
Review Comment:
The comment and method name do not match the behaviour. This method does not
find and return a common point. Instead it finds a common point and if it
exists, merges the hole(s) into the outer polygon and returns true so that the
alternative approach of Eberly's, does not need to run. Perhaps a name like
`mergeHolesWithSharedVertices` would work better?
##########
lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java:
##########
@@ -928,12 +848,42 @@ public void testComplexPolygon55() throws Exception {
public void testComplexPolygon56() throws Exception {
String geoJson = GeoTestUtil.readShape("github-12352-2.geojson.gz");
Polygon[] polygons = Polygon.fromGeoJSON(geoJson);
- for (Polygon polygon : polygons) {
- List<Tessellator.Triangle> tessellation =
- Tessellator.tessellate(polygon, random().nextBoolean());
- assertEquals(area(polygon), area(tessellation), 0.0);
- // don't check edges as it takes several minutes
- }
+ checkMultiPolygon(polygons, 3e-11);
+ }
+
+ public void testComplexPolygon57() throws Exception {
+ String geoJson = GeoTestUtil.readShape("github-13841-1.geojson.gz");
+ Polygon[] polygons = Polygon.fromGeoJSON(geoJson);
+ checkMultiPolygon(polygons, 3e-11);
+ }
+
+ @Nightly
+ public void testComplexPolygon58() throws Exception {
+ String wkt = GeoTestUtil.readShape("github-13841-2.geojson.gz");
+ checkMultiPolygon(wkt);
+ }
+
+ @Nightly
+ public void testComplexPolygon59() throws Exception {
+ String wkt = GeoTestUtil.readShape("github-13841-3.geojson.gz");
+ Polygon[] polygons = (Polygon[]) SimpleWKTShapeParser.parse(wkt);
+ checkMultiPolygon(polygons, 1e-11);
+ }
+
+ public void testComplexPolygon60() throws Exception {
+ String wkt =
+ "POLYGON((0 0, 5 1, 10 0, 11 5, 10 10,5 11, 0 10, 1 5, 0 0),"
Review Comment:
Nice test, this polygon is quite a work of art! Lots of holes with common
edges and a wide range of angles.
##########
lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java:
##########
@@ -928,12 +848,42 @@ public void testComplexPolygon55() throws Exception {
public void testComplexPolygon56() throws Exception {
String geoJson = GeoTestUtil.readShape("github-12352-2.geojson.gz");
Polygon[] polygons = Polygon.fromGeoJSON(geoJson);
- for (Polygon polygon : polygons) {
- List<Tessellator.Triangle> tessellation =
- Tessellator.tessellate(polygon, random().nextBoolean());
- assertEquals(area(polygon), area(tessellation), 0.0);
- // don't check edges as it takes several minutes
Review Comment:
I see you added back the edges check here, so perhaps this comment was not
valid and this test is not taking several minutes?
##########
lucene/core/src/java/org/apache/lucene/geo/Tessellator.java:
##########
@@ -350,30 +349,18 @@ private static final Node eliminateHoles(
}
/** Finds a bridge between vertices that connects a hole with an outer ring,
and links it */
- private static final void eliminateHole(
+ private static void eliminateHole(
final Node holeNode,
Node outerNode,
double holeMinX,
double holeMaxX,
double holeMinY,
double holeMaxY) {
- // Attempt to find a common point between the HoleNode and OuterNode.
- Node next = outerNode;
- do {
- if (Rectangle.containsPoint(
- next.getY(), next.getX(), holeMinY, holeMaxY, holeMinX, holeMaxX)) {
- Node sharedVertex = getSharedVertex(holeNode, next);
- if (sharedVertex != null) {
- // Split the resulting polygon.
- Node node = splitPolygon(next, sharedVertex, true);
- // Filter the split nodes.
- filterPoints(node, node.next);
- return;
- }
- }
- next = next.next;
- } while (next != outerNode);
+ // Attempt to find a common point between the HoleNode and OuterNode.
Review Comment:
This comment and method name should probably change, as discussed in the
other comment.
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