[vtkusers] LOD Advice

Moreland, Kenneth kmorel at sandia.gov
Wed Jul 18 14:36:55 EDT 2007

I believe ParaView uses the vtkQuadricDecimation filter to create the
low level of detail.  It also uses its own implementation of an actor:
vtkPVLODActor, which is in the ParaView source code.  The problem with
the default mechanism in vtkLODActor, which uses rendering timings, is
that it can be easily confused about which is the lower level of detail
when the delta on the rendering times is low or there is a "hiccup" that
causes the lower level of detail to rendering slower for a frame or two.


> -----Original Message-----
> From: vtkusers-bounces+kmorel=sandia.gov at vtk.org [mailto:vtkusers-
> bounces+kmorel=sandia.gov at vtk.org] On Behalf Of Mark Kobine
> Sent: Wednesday, July 18, 2007 10:34 AM
> To: vtkusers at vtk.org
> Subject: [vtkusers] LOD Advice
> Hi,
> I am trying to implement Level Of Detail rendering in Vtk. I initially
> took the approach of replacing my vtkActors with vtkLODActors. This
> displays my geometry as a set of sampled points when I move it.
> What I'd really like is the approach that Paraview takes which is to
> reduce the number of polygons rendered while the geometry is moved.
> Can anyone give me any advice on how to do this?
> Many thanks,
> Mark
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