[vtkusers] Problems porting from Python to C++

[Ketan Mehta]

Hi Lucas,

I have also faced similar problems in tcl examples.
There are mainly due to strong type checking in C++.

Check whether
1) You have included vtkWarpScaler.h in code.
2) try to type case it, but not sure whether it is proper here.

bye
Ketan

> Lucas Peetz Dulley wrote:
> 
> Using Python I did some testings before I went to the C++ version of my code.
>  But, for my surprise , I got some type checking problems... :(
> 
> Here are the codes:
> 
> Python:
> 
> (...)
> dem = vtk.vtkVolume16Reader()
> dem.SetDataDimensions(480, 600)
> dem.SetDataByteOrderToLittleEndian()
> dem.SetFilePrefix("brasil")
> dem.SetDataSpacing(1000, 1000, 10)
> 
> geometry = vtk.vtkImageDataGeometryFilter()
> geometry.SetInput(dem.GetOutput())
> 
> warp = vtk.vtkWarpScalar()
> warp.SetInput(geometry.GetOutput())
> warp.SetScaleFactor(1)
> (...)
> 
> C++:
> 
> (...)
> vtkVolume16Reader *dem = vtkVolume16Reader::New();
>     dem->SetDataDimensions(480, 600);
>     dem->SetDataByteOrderToLittleEndian();
>     dem->SetFilePrefix("brasil");
>     dem->SetDataSpacing(1000, 1000, 10);
> 
> vtkImageDataGeometryFilter *geometry = vtkImageDataGeometryFilter::New();
>     geometry->SetInput(dem->GetOutput());
> 
> vtkWarpScalar *warp = vtkWarpScalar::New();
>         warp->SetInput(geometry->GetOutput());     // I get the error here!!!!
>         warp->SetScaleFactor(1);
> (...)
> 
> This is the error I get:
> 
> main.cc:33: no matching function for call to `vtkWarpScalar::SetInput(vtkPolyData*)'
> /usr/local/include/vtk/vtkPointSetToPointSetFilter.h:57: candidates are: void
>    vtkPointSetToPointSetFilter::SetInput(vtkPointSet*)
> 
> In all the examples (python or tcl) you can get the output from the
> "vtkImageDataGeometryFilter" and set it as the input to "vtkWarpScalar".
> But when I did it using C++ I got the error above.
> 
> Please, can anyone tell me what's wrong? ... I am stuck.
> Any suggestions are more than welcome!!!! :)
> 
> Thanks for you time and patience,
> 
> Lucas
> 
> --
> Lucas Peetz Dulley   <dulley at lsi.usp.br>
> Homepage: http://www.lsi.usp.br/~dulley/
> Virtual Reality Center - CAVERNA Digital
> LSI - POLI - USP   Tel: +55-11-3091-5374
> Av. Prof. Luciano Gualberto, 158 trav. 3
> CEP: 05508-900 - Sao Paulo - SP - Brazil

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