No, it doesn't work. The filter creates tets, which are visible in the wireframe representation, but when I select "Volume" representation the image disappears.
I can't imagine it is so difficult to render a volume in Paraview. I must be doing something wrong.... Regards, Bertwim On 10/13/2014 05:36 PM, Cory Quammen 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
