[vtkusers] vtkGeometryFilter::UnstructuredGridExecute() : BUG ?

[John Biddiscombe]

>the cells in poly data. We could add a flag/ivar "Ordered" in vtkPolyData. 

PolyDataMapper -> OpenGL might take a serious performance hit if swapping
between triangle/line/polygon/strip became frequent.

could use the code from vtkCleanPolyData to make vtkOrderedPolyDataFilter
which skimmed through the cells and rearranged them into verts/lines/polys etc

JB