[vtkusers] QVTKWidget slow rendering

[Daniele Giunchi]

Dear All,
I try some example in VTK-5.6 compiled with VS2008 on WIndows XP,
using Qt-4.7.2.
In particular I tested a vtk Structured Points (~50 Mb) in two
different examples, using basically this code:

-------------------------------------------------------------------------------------------
/Load dataSet
 vtkDataSetReader *reader = vtkDataSetReader::New();
 reader->SetFileName("vtkTestVolume.vtk");
 reader->Update();

 vtkContourFilter* cf = vtkContourFilter::New();
 cf->UseScalarTreeOn();
 cf->SetInputConnection(reader->GetOutputPort());
 cf->SetNumberOfContours(1);
 cf->SetValue(0, 30000);

 // Mapper
 VTK_CREATE(vtkPolyDataMapper, mapper);
 mapper->ImmediateModeRenderingOn();
 mapper->SetInputConnection(cf->GetOutputPort());
------------------------------------------------------------------------------

and the two examples are:

1) Cone5.cxx (direct opengl rendering)
2) SimpleView.cxx (using QVTKWidget rendering)

The same data, on first example render with an acceptable frame rate,
while the second is incredibly slow.
Using the widget also in our test application, we notice the same latency.
Have you got any suggestion for this ?

best,
Daniele Giunchi


----------------------------------------
Dott. Daniele Giunchi
BioComputing Competence Centre
SCS srl
Via Parini 1, 40033 Casalecchio di Reno BO, Italy
http://bit.ly/czAFT3
http://www.scsolutions.it
mailto:d.giunchi at scsolutions.it
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