Improve smesh GUI display() speed for viewing mesh
Primarily, VTKViewer_GeometryFilter
is delegated to vtkGeometryFilter
used by ParaView.
At this point typical performance improvements are 5-10x over
the mesh display, this dependes if multithreaded version of
ParaView (consequently VTK) is used or not
Use old routines for nonlinear cells (quadratic 1D and 2D):
This should fix arc visulization
for quadratic elements
Bypass to old method for Polyhedron datat:
Multi-threding of VTK causes problems
for Polyhedron data, the code at the
moment does not seem stable. To be
investigated in future, if VTK can be
patched.
Addition to non-delegation list:
Add all 3d quadratic, biquadratic and
triquadratic elements to the list of
elements which have to be handled
natively.
