add manifold check

pyvista/core/pointset.py

@@ -848,6 +848,26 @@ def n_open_edges(self):
         alg.Update()
         return alg.GetOutput().GetNumberOfCells()
 
+    @property
+    def is_manifold(self) -> bool:
+        """Return if the mesh is manifold (no open edges).
+
+        Examples
+        --------
+        Show a sphere is manifold.
+
+        >>> import pyvista
+        >>> pyvista.Sphere().is_manifold
+        True
+
+        Show a plane is not manifold.
+
+        >>> pyvista.Plane().is_manifold
+        False
+
+        """
+        return self.n_open_edges == 0
+
     def __del__(self):
         """Delete the object."""
         if hasattr(self, '_obbTree'):

tests/test_filters.py

@@ -1737,6 +1737,11 @@ def test_reconstruct_surface_poly(sphere):
     assert surf.is_all_triangles
 
 
+def test_is_manifold(sphere, plane):
+    assert sphere.is_manifold
+    assert not plane.is_manifold
+
+
 def test_reconstruct_surface_unstructured(datasets):
     mesh = examples.load_hexbeam().reconstruct_surface()
     assert isinstance(mesh, pyvista.PolyData)