[Paraview] plotting only the viewable part of a very large dataset

[David E DeMarle]

Streaming and AdaptiveParaView do that like so:

reader supplies meta information including piece bounding boxes

a filter, vtkVisibilityPrioritizer, is inserted at the end of the pipeline

vtkVisibiltyPrioritizer gets the camera/viewport and the bounding
boxes (if they are not transformed by the intermediate filters) and
rejects pieces that are offscreen so that they are never
read/processed at all

AdaptiveParaView goes one step further and progressively increases the
sampling resolution of each piece

some very recent work by Jon Woodring @ LANL goes further and uses the
screen resolution to improve the resolution sampling algorithm and
works with unstructured data of a particular format

Feel free to try/extend and or borrow from those two experimental
ParaView applications.

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109



On Wed, Apr 28, 2010 at 11:53 AM, Felipe Bordeu Weldt
<felipe.bordeu at ec-nantes.fr> wrote:
> Hi everybody,
>
> I have a very large dataset (structuregrid). (1E4 X 1E4 X 1E4 X 3 )
> I will like to know if is possible for the reader (home made reader) to know
> the resolution of the screen and the volume of space that the camera is
> looking at.
>
> I will like to generate de data only for the viewable portion of the space
> (at the right resolution).
>
> The idea is to have something like "google hearth".
>
> Felipe_______________________________________________
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