[vtkusers] Object size differs with two vtk actors

[Gishara Indeewarie]

Hi all,

I have a vtk render window where I am creating a surface using
vtkVoxelContoursToSurfaceFilter and display.
The surface displays well.
I want to add another vtk object which defines the outline of the surface.
I created it using vtk lines.
My problem is that when I add the second one, the first object becomes very
small,(not the actual size)
How could I fix this issue?

Below is a part of my code demonstrate the problem.


   vtkSmartPointer<vtkCellArray> cells =
vtkSmartPointer<vtkCellArray>::New();

   for (int i=0; i< (t_val-1) ;i++){
   for (int j=0; j< (n+m-2);j++){
   cells->InsertNextCell(4);
cells->InsertCellPoint((i*(n+m-1))+j);
cells->InsertCellPoint((i*(n+m-1))+(j+1));
cells->InsertCellPoint(((i+1)*(n+m-1))+(j+1));
cells->InsertCellPoint(((i+1)*(n+m-1)) +j);

   }
   }

   vtkSmartPointer<vtkPolyData> poly = vtkSmartPointer<vtkPolyData>::New();
  poly->SetPoints(points);
  poly->SetPolys(cells);
  CArray <double,double> *ScalarValues =
doc->get_CFD_ScalarValues(pAirfoil,m_value);
  poly->GetPointData()->SetScalars(weights);


  vtkSmartPointer<vtkVoxelContoursToSurfaceFilter> contoursToSurface =
vtkSmartPointer<vtkVoxelContoursToSurfaceFilter>::New();
 contoursToSurface->SetInput(poly);

vtkSmartPointer<vtkPoints> points_sections =
vtkSmartPointer<vtkPoints>::New();
vtkSmartPointer<vtkCellArray> cells_sections =
vtkSmartPointer<vtkCellArray>::New();
vtkSmartPointer<vtkPolyData> polyData_sections =
vtkSmartPointer<vtkPolyData>::New();
polyData_sections->Allocate();
connectivity = new vtkIdType[a+b];

for(unsigned int c = 0; c < (a+b); c++)
    {
    connectivity[c] = c+i*(a+b);

    }
  polyData_sections->InsertNextCell(VTK_LINE,(a+b),connectivity);

}



 vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(poly->GetProducerPort());
  mapper->ScalarVisibilityOn();
  mapper->SetColorModeToMapScalars();
  mapper->SetLookupTable(colorLookupTable);
  mapper->SetScalarMaterialModeToDefault();
  mapper->SetScalarRange(min,max);

  polyData_sections->SetPoints(points_sections);
  vtkSmartPointer<vtkPolyDataMapper> mapper_sections =
vtkSmartPointer<vtkPolyDataMapper>::New();

  mapper_sections->SetInput(polyData_sections);
   vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->Modified();

  vtkSmartPointer<vtkActor> actor_sections =
vtkSmartPointer<vtkActor>::New();
  actor_sections->SetMapper(mapper_sections);
 actor_sections->GetProperty()->SetColor(255, 0, 0);
  actor_sections->Modified();


   renderer->RemoveAllViewProps();
   renderer->Modified();
renderer->AddActor(actor);
renderer->AddActor(actor_sections);
renderer->ResetCamera();
renderer->SetBackground(1,1,1);

renderer->ResetCamera();
renWin->Render();

Please help me.
Thanks.
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