[vtkusers] How to get all visible Triangles?

[s61500 at htw-dresden.de]

Hello,

I've found the error in the example code.

int* temp = this->Interactor->GetRenderWindow()->GetSize();
unsigned int windowSize[4];
for(unsigned int i = 0; i < 4; i++)
{
   windowSize[i] = temp[i];
}


There you get an array with [300, 300, 1, 1] and there is a problem when
you set the area in this order.
Either you have to write the coordinates in the code or you have to switch
the order of the elements in the array.

But the result of the selection is not perfect. Some visible triangles are
deleted (see the screenshot).
Maybe someone knows where the problem is, could it be the regularity of
the model or something else?

Stefan


> n Mon, Oct 11, 2010 at 9:38 AM, Eric E. Monson <emonson at cs.duke.edu>
> wrote:
>> That basic idea seems to work for me. To try it quickly I did it in
>> Python instead, and I just printed out the SelectionList from the
>> vtkSelectionNode that's attached to the vtkSelection returned by the
>> hardware selector instead of trying to use vtkExtractSelection. The
>> "UserEvent" looks for the "u" key.
>
> Thanks Eric. I added a python example:
> http://www.vtk.org/Wiki/VTK/Examples/Python/Visualization/HardwareSelector
>
> Stefan, once you get it working in c++ if you could update the c++
> example that would be great. I still think we should get it to work
> with the ExtractSelection filter, but hopefully this will work for you
> for now.
>
> David
>
>
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