[vtkusers] vtkExtractROI wrong bounds ??

[Adeline Joliet]

Hello everyone,



I ran into a problem using vtkExtractROI filter. It seems that the bounds I set using "SetVOI" are not correct... They are too big.
To test I did something like that. I created a VOI with this bounds (30,106,0,80,0,60) and I displayed the obtained dataset. Then
I create a vtkCubeSource with the same bounds (except for the x like that the 2 objects are not overlapping and we can see who is who) and when I displayed
it we clearly see that the Z dimension are not the same !?!?! here a the piece of code to see what I'm doing


///// Creation of the VOI
vtkExtractVOI * extractor = vtkExtractVOI::New();

vtkImageData * originalMaskVtkImageData = GetMyImageData ();

	extractor->SetInput(originalMaskVtkImageData);

	extractor->SetVOI(30,106,0,80,0,60);
	extractor->Update();
vtkDataSetMapper *m = vtkDataSetMapper::New();
	m->SetInput(vtkDataSet::SafeDownCast(extractor->GetOutput()));
	vtkActor * v = vtkActor::New();
	v->SetMapper(m);
	m_renderer->AddActor(v);


////// Creation of the Cube
vtkCubeSource * cube = vtkCubeSource::New();
	b[0] = 0;
 b[1] = 106;
	b[2] = 0;
 b[3] = 80;
	b[4] = 0;
	b[5] = 60;

	cube->SetBounds(b);
	vtkPolyDataMapper *m2 = vtkPolyDataMapper::New();
	m2->SetInput(cube->GetOutput ());

	vtkActor * v2 = vtkActor::New();
	v2->SetMapper(m2);
	m_renderer->AddActor(v2);



here a screenshot showing the problem


<a target='_blank' title='ImageShack - Image And Video Hosting' href='http://img186.imageshack.us/i/errorpf.jpg/'><img src='http://img186.imageshack.us/img186/882/errorpf.jpg' border='0'/></a>


http://img186.imageshack.us/img186/882/errorpf.jpg


Does someone know why and how can I have the correct bounds ?


Regards,
Adeline






 		 	   		  
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