Fix issue #1191

Fix the bug in LineString::getPointN, which causes the output point of GEOSGeomGetEndPoint loses the 'm' dimension
libgeos · Nov 15, 2024 · ef16ff8 · ef16ff8
1 parent 51c3b3d
commit ef16ff8
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/geom/LineString.cpp b/src/geom/LineString.cpp
@@ -181,7 +181,12 @@ LineString::getPointN(std::size_t n) const
 {
     assert(getFactory());
     assert(points.get());
-    return std::unique_ptr<Point>(getFactory()->createPoint(points->getAt(n)));
+    if (hasM())
+        return std::unique_ptr<Point>(getFactory()->createPoint(points->getAt<CoordinateXYZM>(n)));
+    else if (hasZ())
+        return std::unique_ptr<Point>(getFactory()->createPoint(points->getAt<Coordinate>(n)));
+    else
+        return std::unique_ptr<Point>(getFactory()->createPoint(points->getAt<CoordinateXY>(n)));
 }
 
 std::unique_ptr<Point>