[Insight-users] Problem trying to visualize vtkImageMarchingCubes

[Juan Ramírez]

Hello, I am working in the extraction of surfaces with 
vtkImageMarchingCubes but I cannot visualize the result.  The
following is the process.

1. First i capture the image itk and pass it to vtk.
2. I pass the vtkImage how input of vtkImageMarchingCubes.
3. I apply the filter and pass it to vtkPolyDataMapper.
4. vtkPolyDataMapper to vtkActor and after to  vtkRenderer.

The code is the following
////////////////////
void CDlgFiltroExtSup::OnMarchingCubes()
{
	this->marcher->SetInput(this->connector->GetOutput());
	double *value = this->connector->GetOutput()->GetScalarRange();
	double isovalue = 0.5*(value[0]+value[1]);
	marcher->SetValue(0,isovalue);
	try{
		marcher->Update();	
		marching=true;
	}
	catch( itk::ExceptionObject & exp )
	{
		MessageBox("Alerta",exp.what(),MB_OK);
	}
}


//////////// for render
if(marching==true)
{
	//this->vtkIToPDF->SetInput(this->marcher->GetOutput());
	this->Mapper->SetInput(this->marcher->GetOutput());
	this->m_Actor->SetMapper(this->Mapper);
	this->m_ren->SetBackground(0,0,0);
	this->m_ren->AddActor(this->m_Actor);
	this->marching=false;
        this->m_RenderWindow->Render();
}

//////////////////////////////

if you can suggest something to me I am thankful to them
--
Juan G. Ramírez
Estudiante Ingenieria de Sistemas UPTC.
Colombia.