I believe that is correct. Run the Tetrahedralize filter and see if that works.
- Aashish On Mon, Oct 13, 2014 at 11:36 AM, Cory Quammen <[email protected]> wrote: > Bertwim, > > I'm not sure that the volume renderer can handle VTK_HEXAHEDRON > elements. Try the "Tetrahedralize" filter on your source and see if > the Volume representation works. > > Thanks, > Cory > > On Mon, Oct 13, 2014 at 10:19 AM, B.W.H. van Beest <[email protected]> wrote: > > Hi, > > > > I'm struggling to get a proper 3D view of my model system (yes, > > embarrassing!) > > but must admit my defeat. > > After stripping almost everything, keeping the minimum to exhibit the > > issue, > > I'm left with the following: > > > > I have created a simple box source. To get a 3D representation, I > > sub-classed > > the code for this Source from vtkUnstructuredGridAlgorithm. > > > > In the RequestData method, I define the 8 point of the unit cube. I > > added the points to the > > underlying unstructed grid, and I specified the cell topology. > > > > This all seems to work: when instantiating this box Source, I *do* get > the > > expected cube in the representations (Surface, wireframe, Points). > > > > However, when I select the "Volume" representation, *the image > disappears* > > What am I doing wrong? > > > > As the code is not too long and very simple, I take the freedom to paste > > it below. > > > > Kind regards. > > Bertwim > > > > ========================================= > > > > int sphBoxSourceC::RequestData( vtkInformation *vtkNotUsed(request), > > vtkInformationVector > > **vtkNotUsed(inputVector), > > vtkInformationVector *outputVector) > > { > > // Get the info object > > vtkInformation *outInfo = outputVector->GetInformationObject(0); > > vtkUnstructuredGrid *umesh = vtkUnstructuredGrid::SafeDownCast( > > outInfo->Get( vtkDataObject::DATA_OBJECT() ) ); > > > > // Pre-allocate some memory > > umesh->Allocate( 1024 ); > > > > // Specify points. > > double r0[] = { 0.0, 0.0, 0.0 }; > > double r1[] = { 1.0, 0.0, 0.0 }; > > double r2[] = { 0.0, 1.0, 0.0 }; > > double r3[] = { 1.0, 1.0, 0.0 }; > > double r4[] = { 0.0, 0.0, 1.0 }; > > double r5[] = { 1.0, 0.0, 1.0 }; > > double r6[] = { 0.0, 1.0, 1.0 }; > > double r7[] = { 1.0, 1.0, 1.0 }; > > > > // Collect the points in a vtk data structures. > > { > > vtkSmartPointer<vtkPoints> points = > vtkSmartPointer<vtkPoints>::New(); > > points->SetDataType( VTK_DOUBLE ); > > > > points->InsertNextPoint( r0 ); > > points->InsertNextPoint( r1 ); > > points->InsertNextPoint( r2 ); > > points->InsertNextPoint( r3 ); > > points->InsertNextPoint( r4 ); > > points->InsertNextPoint( r5 ); > > points->InsertNextPoint( r6 ); > > points->InsertNextPoint( r7 ); > > > > // Transfer points to umesh. > > umesh->SetPoints( points ); > > } > > > > // Cell Topology > > vtkIdType vtx[8] = { 0, 1, 3, 2, 4, 5, 7, 6 }; > > umesh->InsertNextCell( VTK_HEXAHEDRON, 8, vtx ); > > > > return 1; > > } > > > > > > > > _______________________________________________ > > Powered by www.kitware.com > > > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > > > Follow this link to subscribe/unsubscribe: > > http://public.kitware.com/mailman/listinfo/paraview > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > -- *| Aashish Chaudhary | Technical Leader | Kitware Inc. * *| http://www.kitware.com/company/team/chaudhary.html <http://www.kitware.com/company/team/chaudhary.html>*
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