[vtkusers] [VTKUser] Help! How to visualize F(x,y,z)=x^2

[wuhanzymail]

Hi everyone, I want to visualize a this function: F(x,y,z)=x^2 using the vtkContourFilter, but there is no output in my renderwindow. I am novice to the VTK, I don't know what's wrong with my c++ code. Would you please help me? Thank you very much!  // Create DateSet
 static float x[POINTS_DIM]={1,2,3,4,5,6,7,8,9,10};
 static float y[POINTS_DIM]={1,2,3,4,5,6,7,8,9,10};
 static float z[POINTS_DIM]={1,2,3,4,5,6,7,8,9,10};
  vtkUnstructuredGrid *dataSet = vtkUnstructuredGrid::New();
  vtkPoints *newPts = vtkPoints::New();
  vtkFloatArray *newScalars = vtkFloatArray::New();  int index = 0; for(int i=0; i<POINTS_DIM; i++){
  for(int j=0; j<POINTS_DIM; j++){
   for(int k=0; k<POINTS_DIM; k++){
      newPts->InsertPoint(index++, x[i], y[j], z[k]);
      newScalars->InsertValue(index, pow(x[i],2));
   }
  }
 }  dataSet->SetPoints(newPts);
  dataSet->GetPointData()->SetScalars(newScalars);  newPts->Delete(); //reference counted - it's okay
  newScalars->Delete();   // Construct pipeline
  vtkContourFilter *popSurface = vtkContourFilter::New();
    popSurface->SetInput(dataSet);
    popSurface->GenerateValues(5,1,100);
  vtkPolyDataMapper *popMapper = vtkPolyDataMapper::New();
    popMapper->SetInputConnection(popSurface->GetOutputPort());
    popMapper->ScalarVisibilityOff();
  vtkActor *popActor = vtkActor::New();
    popActor->SetMapper(popMapper);
    popActor->GetProperty()->SetOpacity(0.3);
    popActor->GetProperty()->SetColor(.9,.9,.9);  // Create an instance of vtkRenderer
 vtkRenderer *ren1= vtkRenderer::New();
 ren1->SetBackground( 1, 1, 1 );
 ren1->AddActor(popActor); // Create an instance of vtkRenderWindow
 vtkRenderWindow *renWin = vtkRenderWindow::New();
 renWin->AddRenderer( ren1 );
 renWin->SetSize( 300, 300 ); // Create an instance of vtkRenderWindowInteractor
 vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
     iren->SetRenderWindow(renWin); iren->Initialize(); renWin->Render();
 iren->Start();
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