[vtkusers] Using an octree

[Francois Bertel]

Also, if you are looking for an octree as a spatial search object,
don't use vtkHyperOctree, it's a dataset, use vtkCellLocator instead.

On Tue, Feb 10, 2009 at 12:21 PM, David Thompson <dcthomp at sandia.gov> wrote:
> I should add that VTK provides the vtkHyperOctree class (see
> http://www.vtk.org/doc/nightly/html/classvtkHyperOctree.html ) which
> provides a similar type of storage. The difference is that the octree
> templates in the Utilities directory allow an arbitrary structure to be
> stored at every node instead of the usual scalar/vector data.
>
>        David
>
>>  No technical reason. (But as a best-practice convention, it's good
>> not to depend on the API of a VTK Utilities library remaining constant
>> from release to release. These classes are typically used exclusively
>> within VTK *.cxx files and not included by any VTK header files.)
>>
>>
>> In the VTK source tree, the only files that presently include
>> <octree/octree> (note: there is no .h at the end)
>> are Rendering/vtkLabelHierarchy.cxx
>> and Rendering/vtkLabelHierarchyPrivate.h. If a file is include only by
>> a VTK .cxx file or a header file clearly labelled "private" then it's
>> probably best not to rely on it from release to release.
>>
>>
>>
>> Perhaps you should just remove the ".h" and try again....
>>
>>
>>
>>
>> HTH,
>> David
>>
>>
>> On Tue, Feb 10, 2009 at 10:36 AM, David Doria <daviddoria at gmail.com>
>> wrote:
>>         If I include
>>         #include <octree/octree.h>
>>
>>         I get a whole bunch of these errors.
>>
>>         /home/doriad/src/ParaView3/VTK/Utilities/octree/octree.h:9:
>>         error:
>>         expected type-specifier before 'vtkstd'
>>         /home/doriad/src/ParaView3/VTK/Utilities/octree/octree.h:9:
>>         error:
>>         expected '>' before 'vtkstd'
>>         /home/doriad/src/ParaView3/VTK/Utilities/octree/octree.h:23:
>>         error:
>>         ISO C++ forbids declaration of 'octree_node' with no type
>>         /home/doriad/src/ParaView3/VTK/Utilities/octree/octree.h:23:
>>         error:
>>         expected ';' before '<' token
>>
>>         Any reason why I can't use the octree class?
>>
>>         --
>>         Thanks,
>>
>>         David
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>
>
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