Clip and Slice Incorrect for Unstructured Polyhedron Mesh
I have unstructured mesh data based on an Octree mesh. I have written it to files using the Ensight Gold NFaced unstructured mesh element types.
When I attempt to clip or slice the data set I see a few issues.
- Slices often are missing whole cells in the data set.
- Clipping often shows either elements protruding from the clipping plane or recessed from the clipping plane depending on the plane normal.
The missing cells in the slice and the protruding/recessed cells in the clip are the same.
I am quite sure there are no issues in the mesh connectivity. I can visualize the data set well using either a volume rendering or by first using the Tetrahedralize filter. However, even when using the tetrahedralize filter I can generate spherical slices that show missing pieces that would correspond to the missing cells when slicing the original data set.
I've attached images showing the general element edge lattice (Extract Edges) and the described slicing and clipping behavior. I've also attached the EnSight gold case/geo/data file set as a tgz archive.
