[vtkusers] isosurface update issue

[newcfd]

Thanks for your reply. mapSphere was a typing error and should be mapper.
I made the following changes and still have the same problem.

void MyApp::redraw( const double value )
{
    if ( m_pActor == nullptr )
    {
       m_pActor = vtkActor::New();
      vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
       mapper->SetScalarRange(0.0, 1.0);
       m_pActor->SetMapper( mapper );

       renderer->AddActor( m_pActor );
       renderer->SetBackground(1,1,1); // Background color white
   }

   vtkStructuredGrid * mesh =...

  vtkSmartPointer<vtkContourFilter> filter =
  vtkSmartPointer<vtkContourFilter>::New();
  filter->SetInputData( mesh );
  filter->SetNumberOfContours( 1 );
  filter->Setvalue( 0, value ); // value is passed in

  m_pActor->GetMapper()->SetInputConnection( filter->GetOutputPort() );
  renderWindow->Render();
}

It may not be a good idea to delete the actor and make a new one in every
call.



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