Ich möchte mehrere vtkUnstructuredGrids in Paraview anzeigen

Question

Ich habe gerade angefangen zu lernen, VTK zu erhalten. VTU-Format-Dateien. Ich mache WriteVTU, die ein Beispiel für VTK ist. Ich habe den Code leicht modifiziert, so dass zwei Tetraeder in ParaView angezeigt werden, aber nur ein Tetraeder in ParaView angezeigt wird.

Offensichtlich vermisse ich etwas, aber ich kann nicht wo. Ich wäre dankbar für Hinweise.

Dies ist der Code.

#include <vtkVersion.h> 
#include <vtkSmartPointer.h> 
#include <vtkTetra.h> 
#include <vtkCellArray.h> 
#include <vtkXMLUnstructuredGridReader.h> 
#include <vtkDataSetMapper.h> 
#include <vtkActor.h> 
#include <vtkRenderer.h> 
#include <vtkRenderWindow.h> 
#include <vtkRenderWindowInteractor.h> 
#include <vtkXMLUnstructuredGridWriter.h> 
#include <vtkUnstructuredGrid.h> 
#include <vtkPointData.h> 
#include <vtkVertexGlyphFilter.h> 

int main(int argc, char *argv[]) 
{ 
    // Parse command line arguments 
    if(argc != 2) 
    { 
    std::cout << "Required arguments: OutputFilename" << std::endl; 
    return EXIT_FAILURE; 
    } 

    std::string filename = argv[1]; 

    vtkSmartPointer<vtkPoints> points = 
    vtkSmartPointer<vtkPoints>::New(); 
    points->InsertNextPoint(0, 0, 0); 
    points->InsertNextPoint(1, 0, 0); 
    points->InsertNextPoint(1, 1, 0); 
    points->InsertNextPoint(0, 1, 1); 

    points->InsertNextPoint(-1, 0, 0); 
    points->InsertNextPoint(-1, -1, 0); 
    points->InsertNextPoint(0, -1, -1); 

vtkSmartPointer<vtkTetra> tetra = 
    vtkSmartPointer<vtkTetra>::New(); 

    tetra->GetPointIds()->SetId(0, 0); 
    tetra->GetPointIds()->SetId(1, 1); 
    tetra->GetPointIds()->SetId(2, 2); 
    tetra->GetPointIds()->SetId(3, 3); 

vtkSmartPointer<vtkTetra> tetra2 = 
    vtkSmartPointer<vtkTetra>::New(); 

    tetra->GetPointIds()->SetId(0, 0); 
    tetra->GetPointIds()->SetId(1, 4); 
    tetra->GetPointIds()->SetId(2, 5); 
    tetra->GetPointIds()->SetId(3, 6); 

    vtkSmartPointer<vtkCellArray> cellArray = 
    vtkSmartPointer<vtkCellArray>::New(); 
    cellArray->InsertNextCell(tetra); 
    cellArray->InsertNextCell(tetra2); 

    vtkSmartPointer<vtkUnstructuredGrid> unstructuredGrid = 
    vtkSmartPointer<vtkUnstructuredGrid>::New(); 
    unstructuredGrid->SetPoints(points); 
    unstructuredGrid->SetCells(VTK_TETRA, cellArray); 

    // Write file 
    vtkSmartPointer<vtkXMLUnstructuredGridWriter> writer = 
    vtkSmartPointer<vtkXMLUnstructuredGridWriter>::New(); 
    writer->SetFileName(filename.c_str()); 
#if VTK_MAJOR_VERSION <= 5 
    writer->SetInput(unstructuredGrid); 
#else 
    writer->SetInputData(unstructuredGrid); 
#endif 
    writer->Write(); 

    return EXIT_SUCCESS; 
} 

Dies ist die .vtu-Datei.

<?xml version="1.0"?> 
<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian" header_type="UInt32" compressor="vtkZLibDataCompressor"> 
    <UnstructuredGrid> 
    <Piece NumberOfPoints="7"     NumberOfCells="2"     > 
     <PointData> 
     </PointData> 
     <CellData> 
     </CellData> 
     <Points> 
     <DataArray type="Float32" Name="Points" NumberOfComponents="3" format="appended" RangeMin="0"     RangeMax="1.4142135624"   offset="0"     /> 
     </Points> 
     <Cells> 
     <DataArray type="Int64" Name="connectivity" format="appended" RangeMin=""      RangeMax=""      offset="56"     /> 
     <DataArray type="Int64" Name="offsets" format="appended" RangeMin=""      RangeMax=""      offset="108"     /> 
     <DataArray type="UInt8" Name="types" format="appended" RangeMin=""      RangeMax=""      offset="152"     /> 
     </Cells> 
    </Piece> 
    </UnstructuredGrid> 
    <AppendedData encoding="base64"> 
    _AQAAAACAAABUAAAAGAAAAA==eJxjYEAGDfaobGz8hv1IYvux8QElFQn3AQAAAACAAABAAAAAFAAAAA==eJxjYIAAFijNCqXZGIgDAAMAABA=AQAAAACAAAAQAAAADgAAAA==eJxjYYAADigNAACQAA0=AQAAAACAAAACAAAACgAAAA==eJzj4gIAACAAFQ== 
    </AppendedData> 
</VTKFile> 

Answer 1

Entschuldigung. Es ist nur ein Tippfehler.

vtkSmartPointer<vtkTetra> tetra2 = 
    vtkSmartPointer<vtkTetra>::New(); 

    tetra2->GetPointIds()->SetId(0, 0); 
    tetra2->GetPointIds()->SetId(1, 4); 
    tetra2->GetPointIds()->SetId(2, 5); 
    tetra2->GetPointIds()->SetId(3, 6);