vtkSMPContourGrid produces artifacts
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Under certain conditions, the vtkSMPContourGrid filter produces isosurfaces that are patchy and have buggy vertex connections. In these examples, I was using a composite dataset containing vtkUnstructuredGrids (disk_ref_out.ex2) and contouring at 0.000718448 in data array CH4.
The attached images show combinations of:
- MergePieces (merge)
- ScalarTree -- vtkSpanSpace (tree)
merge-off-tree-off produces the correct output.
merge-on-tree-off and merge-off-tree-on both have problems.
Additionally, some polygons flicker in-and-out as subsequent frames are rendered. Uninitialized memory access maybe?