[vtkusers] mesh properties from a camera view

[marco]

Thank you very much David,
this is a good example, I need to study it , but I think I can make it 
work for my needs.

In this example has been used the vtkInteractorStyleTrackballCameraMarco,
can I use just the camera position and the object position?

Marco

On 08/12/2013 12:42 PM, David Doria wrote:
> On Fri, Aug 9, 2013 at 5:33 PM, picci <piccima at gmail.com 
> <mailto:piccima at gmail.com>> wrote:
>
>     Hello All,
>     I have the following problem.
>     I need to calculate and possibly save the information about a 3D
>     object
>     from a determined view.
>     For example if I have a cube I can get the QualityMesure of the
>     mesh on
>     the entire object.
>     I want to calculate the QualityMeasure just on the visible part of the
>     object, from that camera position.
>     Then I'd like to save the visible part of 3D object, but not as image,
>     instead as PolyData so I can still get the QualityMeasure.
>     Or as MetaImage, but I don't know if I can still get the
>     QualityMeasure
>     from a MeatImage format.
>
>     I'm new with vtk and I still have some problem to use all the data
>     format of the library.
>
>     Thank you very much for your help
>
>     I'd like to know how can be your approach at this problem
>
>     Marco
>
>
> Give this a try:
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filtering/ExtractVisibleCells
>
> David

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